Orthopaedic Surgery - Talus Fracture

Basics

The talus is a critical bone of the:

Hindfoot

that transmits body weight from the tibia to the:

Foot.

It articulates with the:

Tibia

Fibula

Calcaneus

and

Navicular.

Functional Importance

The talus plays an essential role in:

Ankle motion

Subtalar motion

and distribution of:

Weight-bearing forces.

Because of its importance to both the ankle and hindfoot, even relatively small abnormalities in talar alignment may substantially affect:

Foot function.

Articular Cartilage

Approximately:

60% of the talar surface

is covered with:

Articular cartilage.

This leaves relatively little surface area available for entry of:

Blood vessels.

Blood Supply

The talar blood supply enters through a limited number of:

Soft-tissue attachments

particularly around the:

Talar neck.

As a result, displaced fractures can interrupt vascular inflow and predispose the talus to:

Osteonecrosis.

Clinical Importance

Talus fractures can be difficult to:

Diagnose

and may have serious complications even when treated appropriately.

A high index of suspicion is important because delayed diagnosis can increase the risk of:

Malunion

Arthritis

and

Osteonecrosis.

Anatomical Types

Fractures may involve the:

Talar neck

Talar body

Posterior process

or

Lateral process.

Osteochondral injuries of the talar dome represent another important group of:

Talar injuries.

Talar Neck Classification

Talar neck fractures are commonly classified using the:

Modified Hawkins classification.

Hawkins Type I

Type I is a:

Nondisplaced talar neck fracture

with preserved alignment of the:

Subtalar

and

Tibiotalar joints.

Hawkins Type II

Type II consists of a displaced talar neck fracture with:

Subluxation or dislocation of the subtalar joint

while the:

Tibiotalar joint remains reduced.

Hawkins Type III

Type III involves a displaced talar neck fracture with dislocation of both the:

Subtalar joint

and

Tibiotalar joint.

This pattern carries a substantially greater risk of:

Osteonecrosis.

Hawkins Type IV

Type IV represents the most severe pattern, with displacement involving the talus and disruption of additional:

Peritalar articulations, classically including the talonavicular joint.

Severe cases may approach:

Talar extrusion.

Talar Body Fractures

Talar body fractures may be described according to the orientation of the:

Fracture plane.

Type I Talar Body Fracture

Type I fractures are primarily:

Coronal

or

Sagittal.

Type II Talar Body Fracture

Type II fractures are primarily:

Horizontal.

Talar Process Fractures

Process fractures include:

Posterior process fractures

and

Lateral process fractures.

Pediatric Considerations

Children have a relatively greater:

Cartilage-to-bone ratio

than adults.

The pediatric talus is therefore somewhat more capable of:

Deformation

before developing a complete:

Fracture.

Epidemiology

Talus fractures are:

Uncommon.

There is no strong universal association with:

Age

or

Sex.

Incidence

Talus fractures account for approximately:

3% of foot fractures.

About:

Half

involve the:

Talar neck.

Talar Body Fractures

Talar body fractures are less common.

Historical reports have estimated that they account for approximately:

7–38% of tarsal fractures

depending on the definition and study population.

Risk Factors

Important mechanisms and activities associated with talus fracture include:

Motor vehicle collisions

Falls from height

and

Snowboarding.

Pathophysiology

The fracture pattern depends on the:

Direction and magnitude of force.

Talar Neck Mechanism

Talar neck fractures commonly occur when the foot is forced into:

Extreme dorsiflexion.

The talar neck becomes impacted against the:

Anterior distal tibia

and may fracture.

Lateral Process Fracture

Lateral process fractures are particularly associated with:

Snowboarding.

A common mechanism is:

External rotation

applied to a:

Dorsiflexed foot

inside a rigid:

Boot.

Talar Body Fracture

Talar body fractures typically result from:

Axial compression

of the talus between the:

Tibia

and

Calcaneus.

Etiology

Most major talus fractures result from:

High-energy trauma.

The classic mechanism includes forceful:

Dorsiflexion of the forefoot and ankle

often combined with:

Axial loading.

Associated Conditions

Talar neck fractures may occur with:

Medial malleolus fractures

and other injuries involving the:

Ankle

Calcaneus

or

Midfoot.

High-Energy Trauma

Because many talar fractures follow high-energy mechanisms, the patient should also be evaluated for additional:

Lower-extremity

Pelvic

Spinal

or systemic:

Traumatic injuries.

Diagnosis

Diagnosis requires:

Careful examination

and appropriate:

Imaging.

Some talar fractures, particularly small process fractures, are easily:

Missed.

Signs and Symptoms

Typical symptoms include:

Severe ankle or hindfoot pain

after substantial:

Trauma.

Swelling

Marked:

Swelling

may develop around the:

Ankle and hindfoot.

Ecchymosis

Bruising may occur over the:

Ankle

Hindfoot

or

Midfoot.

Deformity

Displaced fractures may produce visible:

Deformity

or abnormal prominence of:

Talar fragments.

History

Common injury mechanisms include:

Motor vehicle collision

and

Fall from height.

Aviator’s Astragalus

Historically, talar neck fractures were associated with pilots who sustained violent dorsiflexion injuries while bracing their feet against:

Aircraft rudder pedals.

This led to the historic term:

Aviator’s astragalus.

Physical Examination

Examine the:

Ankle

and

Hindfoot

carefully.

Tenderness

Assess for:

Focal talar tenderness

including around the:

Talar neck

Lateral process

and

Posterior process.

Deformity

Look for:

Abnormal contour

Skin tenting

or displacement suggesting:

Dislocation or fracture-dislocation.

Motion

Assess ankle and subtalar motion carefully when safe.

Pain with:

Ankle

or

Subtalar movement

may indicate significant:

Talar injury.

Skin Examination

Because there is very little protective soft tissue around portions of the talus, displaced fragments may threaten:

Skin viability.

Look for:

Tenting

Blanching

Open wounds

or impending:

Skin necrosis.

Neurovascular Examination

Document:

Sensation

Motor function

Pulses

and

Capillary refill.

Missed Process Fractures

Lateral and posterior process fractures are frequently mistaken for:

Ankle sprains.

Persistent focal pain after an apparently routine ankle injury should lower the threshold for:

CT imaging.

Imaging

Plain Radiographs

Initial imaging usually includes:

AP and lateral ankle radiographs

and appropriate:

Foot views.

Talar Neck View

A specialized oblique view of the talar neck may improve visualization.

This is commonly obtained with the foot in:

Plantarflexion

and approximately:

15° of pronation.

This is often referred to as the:

Canale view.

CT

CT is extremely useful for determining:

Fracture displacement

Comminution

Articular involvement

and presence of:

Associated fractures.

Role of CT

CT is particularly valuable for:

Talar neck

Talar body

and

Process fractures

that are incompletely defined on:

Plain radiographs.

MRI

MRI is not usually the first study for an acute displaced fracture.

It is more useful later when evaluating:

Osteonecrosis

or occult injury when radiographs and CT are:

Nondiagnostic.

Pathological Findings

Occasionally a talar fracture occurs through:

Abnormal bone.

Possible underlying lesions include:

Bone cysts

or

Bone tumors.

Differential Diagnosis

Important differential diagnoses include:

Ankle fracture

Ankle dislocation

Talar dislocation

Calcaneus fracture

and

Navicular fracture.

Treatment

Treatment depends on:

Fracture location

Displacement

Joint congruity

Soft-tissue condition

and

Vascular risk.

Initial Stabilization

Initial treatment includes:

Immobilization

Elevation

and

Cold therapy

for swelling and pain.

Urgent Reduction

A displaced talar fracture or fracture-dislocation with threatened skin should undergo:

Urgent reduction.

The immediate priority is restoration of:

Alignment

and relief of pressure on:

Skin and neurovascular structures.

Importance of Early Reduction

Prompt reduction decreases the risk of:

Skin necrosis

Soft-tissue compromise

and secondary:

Infection.

Nondisplaced Fractures

Selected nondisplaced fractures may be treated with:

Cast or boot immobilization

and strict:

Non-weight-bearing.

Historical Immobilization

Traditional treatment of nondisplaced talar neck fractures may involve below-knee immobilization for up to approximately:

12 weeks

with at least:

6 weeks of non-weight-bearing.

Duration should be individualized according to:

Radiographic healing.

Hawkins Type II

Type II talar neck fractures require:

Anatomic reduction.

Reduction may be achieved by:

Closed

or

Open methods.

Hawkins Type III

Type III injuries almost always require:

Operative reduction and fixation

because of substantial:

Displacement and instability.

Talar Body Fractures

Displaced talar body fractures usually require:

Operative fixation

to restore:

Articular congruity.

Osteonecrosis Risk

Talar body fractures have a particularly high risk of:

Posttraumatic osteonecrosis

and

Posttraumatic arthritis.

Irreducible Fracture

A displaced fracture that cannot be reduced closed requires:

Open reduction and internal fixation.

Soft-Tissue Risk

Displaced talar fragments may create severe pressure against the thin overlying:

Skin.

This can cause:

Skin necrosis

and subsequent:

Infection.

Process Fractures

Small minimally displaced process fractures may often be treated:

Nonoperatively.

Small Process Fracture

A talar process fracture measuring less than approximately:

1 cm

and displaced less than:

2 mm

may be treated with:

Non-weight-bearing immobilization

for approximately:

6 weeks.

Larger Process Fracture

Larger or more displaced fragments may require:

Open reduction and internal fixation

or, in selected small symptomatic fragments,

Excision.

Pediatric Treatment

Nondisplaced pediatric fractures may be treated with:

Immobilization

for approximately:

6–8 weeks.

Acceptable Pediatric Alignment

Because children have greater remodeling capacity, small residual deformity may be acceptable.

Historical thresholds include less than approximately:

5 mm of displacement

and

5° of angulation

after reduction.

Activity

Patients are generally kept:

Non-weight-bearing

for at least:

4–6 weeks

and often longer depending on:

Fracture severity and healing.

Physical Therapy

Range-of-motion exercises are typically started after adequate fracture:

Stability

and removal of:

Immobilization.

Rehabilitation Goals

Therapy focuses on restoring:

Ankle motion

Subtalar motion

Strength

and

Gait.

Medication

Acute pain may initially require:

Short-term opioid analgesia.

As symptoms improve, treatment can transition to:

Acetaminophen

or

NSAIDs

when medically appropriate.

Surgery

The principal surgical goal is:

Anatomic reduction of the articular surfaces

with stable:

Internal fixation.

Surgical Approaches

Talar neck fractures may be approached through:

Medial

and

Lateral incisions.

Dual-Incision Technique

Displaced fractures often benefit from:

Combined anteromedial and anterolateral approaches

because visualization from both sides improves:

Reduction accuracy.

Fluoroscopy

Reduction and implant placement are confirmed with:

Intraoperative fluoroscopy.

Screw Fixation

Cannulated screws may be placed in:

Antegrade

or

Retrograde orientation

depending on fracture geometry.

Plate Fixation

Comminuted talar neck fractures may not provide adequate purchase for screws alone.

In these cases:

Low-profile plate fixation

may help maintain:

Length

Alignment

and

Rotation.

Talar Body Exposure

Talar body fractures can be more difficult to expose because of the surrounding:

Articular surfaces

and

Malleoli.

Medial Malleolar Osteotomy

A:

Medial malleolar osteotomy

may be required to obtain adequate visualization of selected:

Talar body fractures.

Articular Screw Placement

When screws pass through an articular surface, the heads should be:

Countersunk

to avoid damage to opposing:

Cartilage.

Process Fracture Fixation

Large or displaced process fractures may be stabilized using:

Small screws

or

Kirschner wires.

Compartment Syndrome

Severe hindfoot injuries may be associated with:

Foot compartment syndrome.

Monitoring for Compartment Syndrome

Watch for:

Progressive pain

Tense swelling

Pain with passive toe motion

and neurologic:

Changes.

Pressure Measurement

If the diagnosis remains uncertain, intracompartmental pressures may be:

Measured.

Fasciotomy

Confirmed compartment syndrome requires urgent:

Fasciotomy.

Postoperative Immobilization

After fixation, the extremity is placed in a:

Well-padded splint

until swelling decreases.

It may then be converted to a:

Below-knee cast or boot.

Weight Bearing After Surgery

Weight bearing is generally restricted until there is sufficient:

Fracture healing

and stability.

The duration varies according to:

Fracture pattern

Fixation

and evidence of:

Osteonecrosis.

Follow-Up

Long-term radiographic follow-up is important.

Duration

Nondisplaced fractures may be followed radiographically for at least:

18–24 months.

Displaced fractures and fractures complicated by:

Osteonecrosis

may require even longer:

Surveillance.

Prognosis

Outcome is strongly related to the:

Severity of the original injury.

Even with accurate reduction and fixation, severe initial disruption can lead to:

Osteonecrosis

and

Arthritis.

Talar Body Prognosis

Talar body fractures generally have a:

Less favorable prognosis

because of extensive:

Articular injury

and

Vascular disruption.

Historical Outcomes

Some historical series report that as many as:

88%

of patients with talar body fractures developed:

Osteonecrosis

Posttraumatic arthritis

or both.

Complications

Major complications include:

Foot compartment syndrome

Osteonecrosis

Skin necrosis

Infection

Delayed union

Nonunion

Malunion

and

Posttraumatic arthritis.

Osteonecrosis

Osteonecrosis is one of the most feared complications because the talus has a relatively:

Tenuous vascular supply.

Risk increases with:

Fracture displacement

Dislocation

and greater:

Soft-tissue disruption.

Delayed Union

Delayed healing is relatively common because of the limited:

Blood supply

and high proportion of:

Articular cartilage.

Nonunion

Nonunion may cause:

Persistent pain

and chronic:

Disability.

Treatment may require:

Revision fixation

Bone grafting

or

Fusion.

Malunion

Malunion alters normal:

Hindfoot mechanics

and redistributes force across the:

Ankle and subtalar joints.

This may result in:

Chronic pain

and progressive:

Arthritis.

Posttraumatic Arthritis

Arthritis may develop in the:

Tibiotalar

Subtalar

or

Talonavicular joints.

It may occur with or without:

Osteonecrosis.

Salvage Procedures

Severe symptomatic arthritis or talar collapse may ultimately require:

Subtalar fusion

Tibiotalar fusion

or

Pantalar fusion.

Patient Monitoring

Follow-up should assess:

Fracture union

Alignment

Joint congruity

and evidence of:

Talar vascularity.

Hawkins Sign

The:

Hawkins sign

is a subchondral radiolucent band that may appear in the:

Talar dome

during follow-up.

Meaning of Hawkins Sign

It represents:

Subchondral bone resorption

and therefore indicates that at least some:

Talar blood supply is preserved.

Clinical Significance

The presence of a Hawkins sign is reassuring and makes:

Osteonecrosis less likely.

Its absence, however, does not by itself prove:

Osteonecrosis.

MRI for Osteonecrosis

MRI can help confirm or further assess suspected:

Talar osteonecrosis

when radiographic findings are:

Uncertain.

Key Principle

Talus fractures are uncommon but potentially severe hindfoot injuries because much of the talus is covered by articular cartilage and its vascular supply is relatively vulnerable.

Fractures may involve the:

Neck, body, lateral process, or posterior process, with talar neck injuries commonly classified by the:

Modified Hawkins system.

Displaced fractures require:

Urgent reduction to protect the skin, soft tissues, joints, and remaining vascular supply, followed by stable fixation when indicated.

CT is particularly valuable for defining:

Displacement, comminution, and articular involvement.

The most important long-term complications are:

Osteonecrosis, posttraumatic arthritis, malunion, nonunion, and hindfoot stiffness.

Long-term radiographic surveillance is essential, with the:

Hawkins sign serving as a reassuring indicator of preserved talar vascularity when present.

Orthopaedic Surgery - Syndactyly

Basics

Syndactyly is a congenital condition characterized by:

Webbing or fusion of adjacent fingers or toes.

It is usually evident:

At birth.

Synonym

Another term is:

Webbed digits.

Classification

Syndactyly can be classified according to:

The tissues involved

and

The extent of fusion.

Simple Syndactyly

Simple syndactyly involves fusion of:

Skin and soft tissue only

without underlying:

Bony fusion.

Complex Syndactyly

Complex syndactyly includes abnormalities involving:

Bone

Joint

or other deeper structures.

The adjacent bones may be partially or completely:

Fused.

Complete Syndactyly

Complete syndactyly extends along essentially the:

Entire length of the involved digits

to the:

Fingertips.

Incomplete Syndactyly

Incomplete syndactyly involves only a:

Portion of the digit length

with separation present distally or proximally.

Fenestrated Syndactyly

Fenestrated syndactyly describes digits that are:

Separated proximally

but remain joined:

Distally.

Epidemiology

Syndactyly is one of the more common congenital:

Hand abnormalities.

Incidence

It occurs in approximately:

1 in 2,000 live births.

Bilateral Involvement

Approximately:

50% of cases

involve both:

Hands or feet.

Sex and Population

Historical studies have reported syndactyly more frequently in:

Males

and in:

White populations.

Risk Factors

The presence of other congenital abnormalities may increase the likelihood that syndactyly is part of a:

Recognizable syndrome.

Genetics

Most cases are:

Sporadic.

Approximately:

10–40%

have been reported to show a:

Familial pattern.

Sporadic Cases

Historical series suggest that up to approximately:

80%

of cases occur without an obvious:

Family history.

Inheritance

Familial syndactyly can demonstrate:

Autosomal dominant inheritance

in some families, although inheritance depends on the specific:

Syndrome or genetic subtype.

Etiology

Syndactyly results from failure of normal:

Separation of adjacent digits

during embryologic development.

Embryology

Finger and toe separation normally occurs during approximately the:

Sixth to eighth weeks of gestation.

Failure of programmed tissue separation during this period produces:

Persistent webbing.

Cause

In most isolated cases, the precise cause is:

Unknown.

Isolated Versus Syndromic Disease

Syndactyly may occur:

As an isolated congenital abnormality

or as part of a:

Genetic or congenital syndrome.

Most cases are:

Isolated.

Associated Conditions

Conditions associated with syndactyly include:

Apert syndrome

Poland syndrome

Congenital constriction band syndrome

and selected other:

Genetic disorders.

Apert Syndrome

Apert syndrome is characterized by:

Craniosynostosis

and severe:

Complex syndactyly

of the hands and feet.

It has historically been termed:

Acrocephalosyndactyly.

Poland Syndrome

Poland syndrome may include:

Absence or hypoplasia of the pectoralis major muscle

with ipsilateral:

Upper-extremity abnormalities

including:

Syndactyly or brachydactyly.

Congenital Constriction Band Syndrome

Amniotic or congenital constriction bands may produce:

Syndactyly

Distal swelling

Digital deformity

or even:

Amputation.

Neurofibromatosis

Some historical reports describe a slightly increased occurrence of syndactyly with:

Neurofibromatosis

although this is not among its major defining features.

Diagnosis

Diagnosis is usually made by:

Physical examination at birth.

Imaging helps determine whether the condition is:

Simple or complex.

Signs and Symptoms

Syndactyly itself is generally:

Painless.

Functional limitation depends on:

Which digits are involved

and the degree of:

Soft-tissue or bony fusion.

Physical Examination

The examination should assess:

Extent of webbing

Digit length

Joint motion

Independent movement

Nail development

and associated:

Congenital abnormalities.

Joint Motion

Evaluate both:

Active

and

Passive range of motion

at each joint of the involved digits.

Independent Digital Movement

Ask the patient, when developmentally able, to move the two involved digits:

Separately.

Independent motion suggests that major:

Bony fusion

or extensive tendon interconnection is less likely.

Skin Availability

The amount of available skin between the digits is important for planning:

Surgical reconstruction.

A deficiency of local skin may increase the need for:

Skin grafting.

Nail Examination

Inspect the nails for:

Separate nail plates

or

Nail fusion.

Joined nails may suggest more extensive:

Distal skeletal involvement.

Rotational and Angular Deformity

The surgeon should assess for:

Rotation

Angular deformity

and unequal:

Digit length.

These findings may complicate:

Reconstruction.

Imaging

Plain Radiographs

Radiographs are useful for distinguishing:

Simple syndactyly

from

Complex syndactyly.

Radiographic Findings

Imaging can identify:

Bony fusion

Abnormal phalanges

Joint abnormalities

and differences in:

Digit length or alignment.

Vascular Imaging

In difficult complex cases, evaluation of the:

Digital vascular anatomy

may occasionally be required.

MRA or Angiography

MR angiography or conventional angiography may help define:

Neurovascular branching patterns

when standard anatomy is uncertain.

Distal Vascular Bifurcation

If the shared digital artery divides:

Very distally

separation may threaten the blood supply to one of the:

Digits.

This can limit how completely the digits can be:

Separated.

Pathological Findings

Syndactyly may be associated with:

Insufficient skin

between the involved digits.

Fascial Abnormalities

There may be abnormal connections between:

Fascial planes.

Tendon Interconnections

The:

Flexor

and

Extensor tendons

may have abnormal cross-connections between:

Adjacent digits.

Bone and Joint Abnormalities

Complex cases may demonstrate:

Fused phalanges

Abnormal joints

Delta phalanx

or other congenital:

Skeletal abnormalities.

Differential Diagnosis

The major diagnostic distinction is between:

Simple

and

Complex syndactyly.

Other congenital conditions that may resemble or accompany digital fusion include:

Constriction band syndrome

Symbrachydactyly

and syndromic:

Hand malformations.

Treatment

Treatment depends on:

Digits involved

Severity

Functional limitation

Growth asymmetry

and whether the syndactyly is:

Simple or complex.

General Measures

Not every syndactyly requires:

Surgery.

Mild Webbing

Minor incomplete webbing that causes little functional or cosmetic concern may be managed with:

Observation.

Goals of Release

Surgical separation may improve:

Finger independence

Grasp

Pinch

Digit growth

and

Cosmetic appearance.

Border Digits

Syndactyly involving digits of substantially different lengths can lead to:

Growth tethering

and secondary:

Angular deformity.

This is particularly important for:

Thumb-index

and

Ring-small finger syndactyly.

Timing of Surgery

Timing depends on which digits are involved and the complexity of:

The deformity.

Border-Digit Syndactyly

For border digits, release is often performed after approximately:

6 months of age

because unequal digit lengths may produce progressive:

Growth distortion.

Central-Digit Syndactyly

For central digits, surgery is commonly delayed until approximately:

12 months of age

or later when there is less urgency related to:

Growth imbalance.

Complex Cases

Complex syndactyly may require earlier or staged treatment depending on:

Bone fusion

Nail abnormalities

Digit length discrepancy

and

Vascular anatomy.

Physical Therapy

Formal therapy is usually:

Not required before surgery.

Postoperative Therapy

Hand therapy may be useful for:

Scar management

Web-space splinting

and

Range-of-motion exercises.

Surgery

The operative technique depends on:

Extent of webbing

Skin availability

Bony involvement

and

Vascular anatomy.

Web-Space Reconstruction

A properly shaped commissure or web space must be created to reproduce the normal:

Interdigital cleft.

Dorsal Flap

For simple syndactyly, a broad:

Dorsal commissural flap

is commonly used.

The flap is designed with a wider:

Proximal base

to preserve:

Blood supply.

Zigzag Incisions

Interdigitating:

Z-plasty or zigzag skin incisions

are frequently used along the digits.

These reduce the risk of:

Linear scar contracture.

Skin Grafting

After separation, there is often insufficient local skin to cover both digits completely.

Therefore:

Full-thickness skin grafting

may be necessary.

Graft Donor Sites

Potential donor sites include:

Groin

Wrist crease

or other areas providing suitable:

Full-thickness skin.

Graft-Free Techniques

Some modern techniques use local flaps designed to minimize or eliminate the need for:

Skin grafts

in selected simple cases.

Complex Syndactyly

When bones are fused, surgical treatment may require:

Bony separation

in addition to:

Soft-tissue reconstruction.

Tendon and Ligament Reconstruction

Abnormal:

Tendon

Ligament

or

Joint structures

may also need to be:

Reconstructed.

Neurovascular Considerations

Each separated digit must retain an adequate:

Digital artery

and intact:

Digital nerve supply.

Staged Release

When three adjacent digits are joined, separation is often performed in:

Stages.

This helps preserve at least one intact:

Neurovascular bundle

on each side of a digit during healing.

Postoperative Dressing

Postoperative dressing is a critical part of:

Treatment.

Immobilization

The hand and arm may be immobilized in a:

Bulky protective dressing

with or without an:

Above-elbow cast.

Duration of Dressing

The initial protective dressing is commonly maintained for approximately:

2–3 weeks

depending on:

Wound healing

and surgeon preference.

Follow-Up

Patients require follow-up to assess:

Wound healing

Skin graft survival

Digit perfusion

and

Web-space shape.

Long-Term Follow-Up

As the child grows, monitoring should continue for:

Scar contracture

Web creep

Angular deformity

and recurrent:

Syndactyly appearance.

Prognosis

The prognosis after appropriate treatment is generally:

Good.

Cosmetic Outcome

Minor differences in:

Finger width

Nail shape

Skin appearance

or

Web depth

may remain after reconstruction.

Functional Outcome

Most children achieve useful:

Independent finger motion

and improved:

Hand function.

Complications

Potential complications include:

Stiffness

Wound dehiscence

Scar contracture

Partial web recurrence

and rare:

Vascular compromise.

Web Creep

One of the more common long-term complications is:

Web creep.

This refers to gradual distal migration of the reconstructed:

Web space

as the child grows.

Scar Contracture

Linear or hypertrophic scars can produce:

Contracture

and restrict:

Finger motion.

Wound Dehiscence

Separation of the surgical wound can occur, particularly when:

Skin tension

is excessive.

Digital Stiffness

Complex reconstruction may occasionally result in loss of:

Joint motion.

Circulatory Compromise

Damage to shared digital vessels can cause:

Ischemia

and in severe cases:

Loss of the digit.

This complication is:

Rare.

Prevention of Vascular Injury

Risk can be reduced by carefully preserving at least one:

Collateral digital vascular supply

and avoiding simultaneous release on both sides of a digit when this would endanger:

Perfusion.

Patient Monitoring

Children should be monitored throughout growth for:

Web creep

Scar contracture

Joint stiffness

Digit angulation

and evolving:

Functional limitation.

Key Principle

Syndactyly is a congenital failure of separation of adjacent digits during approximately the sixth to eighth weeks of embryonic development.

It may be:

Simple or complex

and

Complete or incomplete.

Most cases are isolated, although syndactyly may occur with conditions such as:

Apert syndrome, Poland syndrome, or congenital constriction band syndrome.

Surgical release is performed when the deformity affects:

Function, growth, or appearance, with earlier treatment often preferred for border digits because unequal digit lengths may cause progressive:

Angular deformity.

Successful reconstruction requires careful management of:

Skin coverage, neurovascular anatomy, web-space formation, and postoperative scar control.

Orthopaedic Surgery - Swan Neck Deformity

Basics

Swan neck deformity is a characteristic digital deformity consisting of:

Hyperextension of the proximal interphalangeal joint

combined with:

Flexion of the distal interphalangeal joint.

There may also be compensatory:

Flexion at the metacarpophalangeal joint.

Characteristic Posture

The classic deformity therefore consists of:

MCP flexion

PIP hyperextension

and

DIP flexion.

Not every patient demonstrates abnormalities at all three joints.

Mechanism

The deformity develops when the balance between:

Flexion

and

Extension forces

across the finger becomes abnormal.

The essential biomechanical feature is excessive:

Extension force across the PIP joint

relative to available:

Flexion restraint.

Traumatic Causes

Traumatic causes include:

Mallet finger

Flexor digitorum superficialis laceration

and injuries involving the:

Extensor mechanism around the PIP joint.

Other Causes

Swan neck deformity may also result from:

Intrinsic muscle contracture

Volar plate laxity

or

Volar subluxation of the MCP joint.

These mechanisms are particularly important in:

Rheumatoid arthritis.

Epidemiology

Swan neck deformity can occur after:

Trauma

or as part of chronic:

Inflammatory joint disease.

Rheumatoid Arthritis

Among patients with rheumatoid arthritis, the deformity is reported more commonly in:

Women

than in men.

This partly reflects the greater overall prevalence of rheumatoid arthritis in:

Women.

Incidence

Rheumatoid arthritis affects approximately:

0.5–1% of the general population.

Among patients with established rheumatoid arthritis, swan neck deformity may eventually develop in a substantial proportion.

Historical series have reported occurrence in up to:

Approximately half of patients

during the course of longstanding disease.

Short-Term Incidence

Some studies have reported an incidence of approximately:

8% over 2 years

among patients with rheumatoid disease.

Risk Factors

Important risk factors include:

Rheumatoid arthritis

Mallet finger

Digital laceration

Intrinsic muscle tightness

Neurologic spasticity

and

Volar plate laxity.

Sports Injury

Sports participation may predispose to:

Mallet finger

through closed avulsion injury of the:

Distal extensor tendon.

A chronic untreated mallet finger can subsequently lead to:

Swan neck deformity.

Digital Laceration

Dorsal or volar lacerations may disrupt:

Extensor

or

Flexor structures

and alter normal force balance across the:

PIP joint.

Neurologic Disorders

Intrinsic muscle tightness may occur with:

Traumatic brain injury

Stroke

or other conditions producing:

Spasticity.

This can contribute to excessive:

PIP extension.

Rheumatoid Disease

Rheumatoid arthritis may create multiple contributing abnormalities, including:

Intrinsic muscle contracture

Volar plate attenuation

MCP subluxation

and progressive destruction of:

Joint stabilizers.

Etiology

The deformity develops when the net forces acting across the:

PIP joint

favor excessive:

Extension.

This is accompanied by secondary alteration in the:

Distal extensor mechanism

producing:

DIP flexion.

Mallet Finger Mechanism

In chronic mallet finger, loss of terminal extensor function at the:

DIP joint

allows the extensor mechanism to redistribute proximally.

This can increase extension force across the:

PIP joint

and eventually produce:

Swan neck posture.

FDS Injury

Injury or loss of function of the:

Flexor digitorum superficialis

removes an important flexion restraint at the:

PIP joint.

This predisposes the joint to:

Hyperextension.

Volar Plate Laxity

The:

Volar plate

normally resists excessive PIP:

Hyperextension.

Attenuation or laxity permits the PIP joint to move beyond its normal:

Extension limit.

Intrinsic Tightness

Tight intrinsic muscles can increase:

PIP extension

and alter the balance of:

Digital tendon forces.

Associated Conditions

The principal associated systemic disorder is:

Rheumatoid arthritis.

Other associated conditions may include:

Neurologic spasticity

and chronic post-traumatic:

Tendon imbalance.

Diagnosis

Diagnosis is usually made by:

Clinical examination.

The clinician should determine both:

The underlying cause

and whether the deformity remains:

Flexible or fixed.

Signs and Symptoms

The most obvious finding is:

PIP hyperextension

with

DIP flexion.

Functional Symptoms

Patients may report difficulty with:

Grasping objects

Making a fist

Pinch activities

or placing the hand into:

Pockets or gloves.

Pain

Pain may arise from:

Inflammatory arthritis

PIP joint degeneration

or associated:

Tendon pathology.

Some flexible deformities may produce relatively little:

Pain.

History

A detailed history should address:

Prior finger trauma

Mallet finger

Digital lacerations

and symptoms of:

Inflammatory arthritis.

Rheumatologic History

Ask about:

Joint swelling

Morning stiffness

Multiple-joint pain

and personal or family history of:

Rheumatoid arthritis or other inflammatory disease.

Physical Examination

Examine:

MCP

PIP

and

DIP joints

of the affected finger.

Both:

Active

and

Passive range of motion

should be documented.

Comparison Examination

The affected digit should be compared with:

Adjacent fingers

and the corresponding digit of the:

Contralateral hand.

Flexible Deformity

Early swan neck deformity may remain:

Passively correctable.

The patient may also retain nearly full:

Active motion.

Fixed Deformity

With chronic progression, the joints may develop:

Capsular contracture

Tendon shortening

and

Articular degeneration.

The deformity then becomes:

Stiff or fixed.

Finochietto–Bunnell Test

The:

Finochietto–Bunnell test

helps distinguish:

Intrinsic muscle tightness

from

PIP capsular restriction.

Test Technique

Passively flex the:

PIP joint

while comparing motion with the:

MCP joint extended

and then:

Flexed.

Capsular Restriction

If PIP flexion remains equally limited regardless of MCP position, the problem is more consistent with:

Capsular restriction.

Intrinsic Tightness

If PIP flexion improves when the MCP joint is:

Flexed

the limitation is more consistent with:

Intrinsic muscle tightness.

Joint Stability

The PIP joint should also be assessed for:

Volar plate laxity

and excessive:

Hyperextension.

Tendon Examination

Evaluate:

Terminal extensor function

at the DIP joint and function of the:

Flexor digitorum superficialis.

This helps identify the mechanical cause of the:

Deformity.

Imaging

Plain Radiographs

Standard radiographs should include:

PA

Lateral

and

Oblique views.

Radiographic Assessment

Imaging can identify:

Joint-space narrowing

Articular destruction

Subluxation

Fracture

and

Bony mallet injury.

Rheumatoid Disease

In rheumatoid arthritis, radiographs may demonstrate:

Erosions

Joint-space loss

MCP subluxation

and other features of:

Inflammatory arthropathy.

Differential Diagnosis

Important differential diagnoses include:

Boutonnière deformity

Mallet finger

PIP dislocation

and

Nonunion of proximal or middle phalanx fractures.

Boutonnière Deformity

Boutonnière deformity is essentially the opposite digital posture:

PIP flexion

with

DIP hyperextension.

This distinction is important because the underlying tendon imbalance and treatment are:

Different.

Mallet Finger

Mallet finger consists primarily of:

DIP flexion

due to loss of terminal extensor function.

A chronic mallet injury may progress to:

Swan neck deformity.

PIP Dislocation

Prior PIP dislocation may cause:

Volar plate injury

and chronic:

Hyperextension instability.

Treatment

Management depends on:

Cause

Flexibility of the deformity

Joint condition

Symptoms

and

Functional impairment.

General Measures

Flexible deformities can often be managed initially with:

Nonoperative treatment.

Ring Splints

A:

Double-ring splint

or other anti-hyperextension splint may prevent excessive:

PIP extension.

This can substantially improve:

Finger function.

Extension-Block Splint

An:

Extension-block splint

allows PIP flexion while preventing excessive:

Hyperextension.

DIP Splinting

Progressive splinting may also be used to address:

Persistent DIP flexion deformity

and improve:

Distal joint extension.

Hand Therapy

Hand therapy is useful for:

Passive stretching

Joint mobilization

Splint fabrication

and maintenance of:

Functional motion.

Flexible Versus Fixed Deformity

Nonoperative treatment is most effective when the deformity remains:

Flexible

and the articular surfaces are relatively:

Preserved.

Medication

Pain relief may include:

Acetaminophen

or

NSAIDs

when medically appropriate.

Acute Tendon Repair

If an acute extensor or flexor tendon injury requires repair, a:

Digital nerve block

or other suitable anesthesia may be used.

Rheumatoid Arthritis Treatment

When the deformity is secondary to:

Rheumatoid arthritis

management of the systemic disease is essential.

DMARD Therapy

Treatment may require:

Disease-modifying antirheumatic drugs

under the care of a:

Rheumatologist.

Other Rheumatoid Medications

Depending on disease severity, treatment may also include:

Glucocorticoids

NSAIDs

and other:

Analgesics.

Controlling the underlying inflammatory disease may slow progression of:

Joint destruction and deformity.

Surgery

Surgery is considered when there is:

Persistent functional limitation

Pain

Failure of splinting

or progressive:

Fixed deformity.

Flexible Deformity Surgery

When passive motion is preserved, surgery focuses on restoring:

Tendon balance

and preventing excessive:

PIP hyperextension.

Volar Plate Advancement

The volar plate may be:

Advanced or tightened

to improve restraint against:

PIP hyperextension.

Central Slip Tenotomy

Selected deformities may be treated with:

Central slip tenotomy

to reduce excessive extension force across the:

PIP joint.

Intrinsic Release

When intrinsic muscle tightness is the major cause, an:

Intrinsic release

may improve:

PIP flexion.

FDS Tenodesis

The:

Flexor digitorum superficialis

may be used as a:

Tenodesis

to limit excessive:

PIP extension.

Volar Skin Procedure

A:

Volar skin ellipse

at the PIP joint may occasionally be used to restrict:

Hyperextension.

Late-Stage Disease

In advanced disease, chronic deformity may be accompanied by:

Joint arthrosis

and loss of:

Passive correctability.

Arthrodesis

A severely painful or destroyed PIP joint may require:

Fusion

in a functional position.

Arthroplasty

Joint replacement may be considered in selected patients with:

Advanced arthritic destruction

where preservation of some:

Motion

is desirable.

Follow-Up

Patients should be reassessed for:

Progression of deformity

Splint effectiveness

Range of motion

and

Functional improvement.

Rheumatology Follow-Up

Patients with inflammatory arthritis require continued:

Rheumatologic management

to control the underlying:

Systemic disease.

Hand Surgeon Referral

Referral to a:

Hand surgeon

is appropriate when the deformity is:

Progressive

Functionally limiting

Painful

or likely to require:

Operative reconstruction.

Prognosis

Both nonoperative and surgical treatment can produce:

Meaningful deformity correction

and improved:

Hand function.

Recurrence

Recurrence is relatively common because the deformity often results from persistent underlying:

Tendon imbalance

Joint laxity

or

Inflammatory disease.

Flexible Deformities

Flexible deformities generally have a better prognosis with:

Splinting

and

Soft-tissue reconstruction.

Fixed Deformities

Chronic fixed deformities are more difficult to correct because of:

Capsular contracture

Tendon shortening

and

Arthrosis.

Complications

Incomplete Correction

The deformity may not be completely corrected by either:

Splinting

or

Surgery.

Recurrence

Even after successful treatment, excessive PIP extension may:

Recur.

PIP Stiffness

Overcorrection or postoperative scarring may result in:

PIP stiffness.

Loss of DIP Extension

Excessive alteration of extensor balance may produce:

Loss of DIP extension.

Surgical Imbalance

Because correction requires redistribution of complex tendon forces, excessive correction in one direction may produce a new:

Digital imbalance.

Patient Monitoring

Monitoring should include:

Active and passive MCP motion

PIP motion

DIP motion

Joint stability

and progression of:

Functional limitation.

Key Principle

Swan neck deformity is characterized by:

PIP hyperextension with DIP flexion, sometimes accompanied by MCP flexion.

It results from an imbalance in digital tendon forces, commonly associated with:

Rheumatoid arthritis, chronic mallet finger, FDS injury, volar plate laxity, or intrinsic muscle tightness.

The:

Finochietto–Bunnell test

helps distinguish intrinsic tightness from capsular restriction.

Flexible deformities are commonly treated with:

Ring splints, extension-block splints, stretching, and hand therapy.

When deformity is persistent or advanced, surgery may involve:

Volar plate advancement, central slip tenotomy, intrinsic release, FDS tenodesis, arthrodesis, or arthroplasty, depending on the:

Stage of disease and condition of the joint.

Orthopaedic Surgery - Supracondylar Elbow Fracture

Basics

A supracondylar humerus fracture occurs through the:

Distal humeral metaphysis

just proximal to the:

Elbow joint.

The fracture commonly passes through the relatively thin region of bone surrounding the:

Olecranon fossa.

Age-Related Injury Pattern

The same hyperextension mechanism produces different injury patterns according to age.

In:

Children

it commonly produces a:

Supracondylar humerus fracture.

In:

Toddlers

injury may instead involve the:

Distal humeral physis.

In:

Adults

a comparable mechanism more commonly results in:

Elbow dislocation

or other distal humeral fracture patterns.

Classification by Mechanism

Supracondylar fractures are classified as:

Extension type

or

Flexion type.

Extension-Type Fracture

Approximately:

95%

are extension-type injuries.

They typically occur after a:

Fall on an outstretched hand

with the elbow forced into:

Hyperextension.

Flexion-Type Fracture

Flexion-type fractures are:

Uncommon.

They usually result from a direct fall onto a:

Flexed elbow.

Gartland Classification

The:

Gartland classification

is the most commonly used system for extension-type supracondylar fractures.

Gartland Type I

Type I fractures are:

Nondisplaced.

Overall alignment is maintained, although an occult fracture may be suggested by:

Elbow effusion or posterior fat-pad sign.

Gartland Type II

Type II fractures are:

Displaced but retain some cortical continuity.

A posterior cortical hinge is typically preserved.

Gartland Type III

Type III fractures are:

Completely displaced

with no meaningful cortical contact between the:

Proximal and distal fragments.

These injuries have a substantially greater risk of:

Neurovascular complications.

Gartland Type IV

Type IV fractures are unstable in both:

Flexion

and

Extension.

This multidirectional instability usually reflects:

Complete periosteal disruption.

Synonym

A broader term is:

Distal humerus fracture

although this includes several other fracture patterns besides supracondylar injuries.

Epidemiology

Supracondylar humerus fracture is one of the most common:

Elbow fractures in children.

Age

The mean age at injury is approximately:

6 years.

Most occur in children between approximately:

5 and 7 years of age.

Sex

The injury occurs in both sexes with an approximately:

Equal distribution.

Adults

True supracondylar fractures are:

Uncommon in adults.

Adult distal humeral fractures overall have historically occurred at rates around:

5–6 per 100,000 persons per year.

Risk Factors

The principal risk factor is:

Fall on an outstretched upper extremity.

Participation in activities associated with falls, such as:

Playground activity

Sports

and

Cycling

may increase exposure to the typical mechanism.

Etiology

The classic mechanism is:

Fall on an outstretched hand

with the elbow driven into:

Hyperextension.

Extension Mechanism

During hyperextension, the:

Olecranon

acts as a fulcrum against the:

Olecranon fossa.

This concentrates force through the thin distal humeral metaphysis and produces:

Fracture.

Flexion Mechanism

Rarely, a direct fall onto a:

Flexed elbow

drives the distal fragment:

Anteriorly

and produces a:

Flexion-type supracondylar fracture.

Associated Conditions and Injuries

Important associated injuries include:

Ipsilateral forearm fracture

Brachial artery injury

and injuries to the:

Median

Anterior interosseous

Radial

or

Ulnar nerves.

Floating Elbow

A supracondylar fracture associated with an ipsilateral:

Forearm fracture

is sometimes called a:

Floating elbow.

This combination requires particularly careful monitoring for:

Compartment syndrome.

Diagnosis

Diagnosis is based on:

Trauma history

Physical examination

and

Radiographs.

Signs and Symptoms

Patients usually present after an acute injury with:

Severe elbow pain

Swelling

and refusal or inability to:

Move the arm.

Deformity

Displaced fractures may produce obvious:

Elbow deformity.

Ecchymosis

Bruising may develop in the:

Antecubital fossa

within several hours after injury.

Nerve Injury

Neurologic injury may present as inability to perform normal:

Finger

Thumb

or

Wrist movements.

Arterial Injury

Brachial artery compromise may produce:

Absent pulse

Pallor

Coolness

Delayed capillary refill

and, in severe ischemia,

Loss of motor function.

Physical Examination

The examination should be systematic and include:

Inspection

Palpation

Motor testing

Sensory testing

and careful:

Vascular assessment.

Swelling

Substantial swelling around the:

Elbow

is common.

Rapidly increasing swelling requires concern for:

Vascular injury or compartment syndrome.

Type III Deformity

A completely displaced fracture may create an:

S-shaped appearance

around the elbow and can sometimes resemble:

Elbow dislocation.

Skin Assessment

Inspect for:

Skin puckering

Tenting

Open injury

or threatened:

Skin viability.

Neurovascular Examination

A thorough neurovascular examination should be performed:

Before and after any reduction.

Documentation is essential because nerve and vascular injury are relatively:

Common.

Motor Examination

Motor testing should include the:

Median nerve

Anterior interosseous nerve

Radial nerve

and

Ulnar nerve.

Anterior Interosseous Nerve

The anterior interosseous nerve can be tested by asking the patient to make an:

“OK” sign

using the:

Thumb and index finger.

Weakness may produce a flattened:

Pinch posture.

Median Nerve

Median nerve motor function can be assessed by:

Thumb opposition

or finger flexion, depending on the child’s cooperation.

Radial Nerve

Ask the patient to:

Extend the wrist or fingers.

Ulnar Nerve

Ask the patient to:

Abduct or adduct the fingers

when cooperation permits.

Sensory Examination

Sensation should be tested in the:

Median

Radial

and

Ulnar nerve distributions.

Vascular Examination

Assess:

Radial pulse

Skin color

Temperature

and

Capillary refill.

Pulseless Hand

A child may have a:

Pulseless but well-perfused hand

after supracondylar fracture.

This situation requires urgent orthopaedic evaluation and careful reassessment after:

Reduction.

Poorly Perfused Hand

A pulseless hand that is:

Pale

Cool

or has poor capillary refill represents a:

Vascular emergency.

Compartment Syndrome

Severe pain with passive stretch of the:

Fingers

may indicate evolving:

Forearm compartment syndrome.

Other concerning findings include:

Increasing analgesic requirement

Tense swelling

and worsening:

Neurovascular status.

Imaging

Plain Radiographs

Standard:

AP

and

Lateral radiographs

of the distal humerus and elbow are usually sufficient.

Imaging Technique

Because the injured child may be unable to fully extend the elbow, imaging should be centered carefully on the:

Distal humerus.

Posterior Fat-Pad Sign

In an occult nondisplaced fracture, the only radiographic clue may be a:

Posterior fat-pad sign.

Visualization of a posterior fat pad after trauma strongly suggests:

Intra-articular fracture.

Anterior Humeral Line

On the lateral radiograph, the:

Anterior humeral line

should normally pass through the middle portion of the:

Capitellum.

Posterior displacement of the distal fragment may cause the line to pass anterior to the:

Capitellum.

Baumann Angle

The:

Baumann angle

on the AP radiograph can help assess:

Coronal alignment

and risk of:

Varus malunion.

Differential Diagnosis

Important alternative diagnoses include:

Elbow dislocation

Lateral condyle fracture

Medial condyle fracture

Intercondylar or bicondylar distal humerus fracture

and, in toddlers,

Distal humeral physeal injury.

Treatment

Treatment depends on:

Fracture displacement

Stability

Neurovascular status

and

Soft-tissue condition.

Initial Stabilization

Until definitive orthopaedic assessment, the elbow should be immobilized in a:

Well-padded splint

with the elbow in modest flexion.

Flexion During Initial Splinting

Approximately:

20–30° of elbow flexion

may be used when swelling or vascular status is concerning.

The goal is to avoid additional:

Displacement

and

Neurovascular compromise.

Excessive Flexion

Elbow flexion beyond approximately:

90°

can increase:

Forearm compartment pressure

and potentially compromise:

Brachial artery flow.

Therefore, excessive flexion should be avoided, particularly in:

Swollen displaced fractures.

Gartland Type I Treatment

Type I injuries are generally treated with:

Immobilization.

A long-arm splint or cast is typically used for approximately:

3 weeks

depending on healing and symptoms.

Gartland Type II Treatment

Type II injuries may be treated with:

Closed reduction

followed by:

Casting

or

Percutaneous pin fixation

depending on:

Alignment

Rotational stability

Swelling

and reliability of:

Cast position.

Gartland Type III Treatment

Type III injuries generally require:

Closed reduction and percutaneous pinning.

Gartland Type IV Treatment

Type IV fractures are multidirectionally unstable and typically require:

Operative reduction and pin fixation.

Analgesia

Pain control may include:

Acetaminophen

and, when necessary,

Short-term opioid analgesia.

Physical Therapy

Formal physical therapy is generally:

Not routinely required in children.

Most children recover elbow motion spontaneously after:

Fracture healing and cast removal.

Adult Rehabilitation

In adults, structured physical therapy is more commonly used because elbow stiffness is:

More problematic.

Surgery

Closed reduction should be attempted under appropriate:

Sedation or anesthesia

for displaced unstable fractures.

Reduction Goals

The goals are to restore:

Sagittal alignment

Coronal alignment

Rotation

and normal relationship of the:

Distal humeral fragments.

Open Reduction

Open reduction may be required when:

Closed reduction fails

or when there is concern for:

Entrapped soft tissue

Open fracture

Persistent vascular compromise

or another mechanical block.

Timing of Surgery

In a child with a well-perfused limb and no urgent complication, fixation can often be performed:

Urgently but not necessarily immediately overnight.

A delay of less than approximately:

24 hours

has not consistently been associated with worse outcomes when:

Neurovascular status is stable.

Percutaneous Pinning

Unstable fractures are commonly stabilized with:

Kirschner wires.

Lateral Pinning

Two or three:

Lateral-entry pins

can provide stable fixation while avoiding direct risk to the:

Ulnar nerve.

Crossed Pinning

Crossed medial and lateral pins may provide excellent:

Mechanical stability

but placement of a medial pin increases the risk of:

Iatrogenic ulnar nerve injury.

Pin Selection

The configuration is chosen according to:

Fracture pattern

Stability after reduction

and surgeon:

Preference.

Flexion-Type Fractures

Flexion-type supracondylar fractures are generally treated with:

Reduction and pin fixation

when significantly displaced.

Postoperative Immobilization

After fixation, the elbow is usually immobilized for approximately:

3–4 weeks.

Pin Removal

Percutaneous pins are commonly removed around:

3–4 weeks

once adequate healing is present, although timing may vary according to:

Fracture pattern

and

Radiographic healing.

Vascular Injury

After reduction and fixation, perfusion should be reassessed by examining:

Pulse

Capillary refill

Color

and

Temperature.

Persistent Poor Perfusion

If the hand remains:

Pulseless and poorly perfused

after reduction, urgent:

Vascular exploration

may be necessary.

Compartment Syndrome

Prompt recognition of vascular compromise and excessive swelling helps reduce the risk of:

Compartment syndrome.

If established compartment syndrome develops, urgent:

Fasciotomy

is required.

Follow-Up

Children require clinical and radiographic follow-up to verify:

Maintenance of reduction

and

Fracture healing.

Early Monitoring

Early follow-up should reassess:

Neurovascular status

Cast or splint condition

and

Alignment.

After Healing

Following fracture union, the patient should be assessed for:

Elbow motion

Carrying angle

and residual:

Deformity.

Prognosis

The prognosis is generally:

Excellent

when alignment and neurovascular status are restored promptly.

Motion Recovery

Most children gradually regain near-normal:

Elbow range of motion

without formal therapy.

Malunion

Poor alignment during healing may cause:

Angular deformity.

The most characteristic is:

Cubitus varus.

Complications

Nerve Injury

Transient nerve injuries are relatively common.

The:

Anterior interosseous branch of the median nerve

is frequently affected in extension-type injuries.

The:

Radial nerve

and

Ulnar nerve

may also be injured depending on:

Fracture displacement and type.

Nerve Recovery

Most traumatic neurapraxias recover spontaneously over:

Weeks to months.

Persistent deficits require further:

Evaluation.

Brachial Artery Injury

The:

Brachial artery

may be stretched, kinked, trapped, or injured by displaced fracture fragments.

Compartment Syndrome

Compromised arterial flow or severe swelling may lead to:

Forearm compartment syndrome.

Volkmann Ischemic Contracture

Untreated compartment syndrome can result in:

Volkmann ischemic contracture

with permanent:

Muscle fibrosis

Joint contracture

and

Neurologic dysfunction.

Cubitus Varus

Malunion can produce:

Cubitus varus

or a:

Gunstock deformity.

This is primarily caused by:

Coronal and rotational malalignment

rather than growth disturbance.

Elbow Stiffness

Temporary stiffness is common after immobilization, but persistent stiffness is relatively:

Uncommon in children

when the fracture heals in good alignment.

Trochlear Osteonecrosis

Rarely, vascular disturbance of the trochlea may produce:

Osteonecrosis

and a late:

Fishtail deformity.

Iatrogenic Ulnar Nerve Injury

Medial pin placement can injure the:

Ulnar nerve.

This risk is reduced when fixation can be achieved using:

Lateral-entry pins alone.

Patient Monitoring

Patients should be monitored for:

Pain

Swelling

Neurovascular status

Alignment

Fracture healing

and recovery of:

Elbow motion.

Key Principle

Supracondylar humerus fracture is a common pediatric elbow injury occurring through the distal humeral metaphysis, usually after a fall on an outstretched hand with hyperextension.

The most widely used classification is the:

Gartland system, ranging from Type I nondisplaced fractures to Type IV multidirectionally unstable injuries.

The most important early concern is:

Neurovascular injury, particularly involving the brachial artery and anterior interosseous, median, radial, or ulnar nerves.

Type I fractures are usually treated with:

Immobilization, whereas displaced unstable Type II, Type III, and Type IV fractures commonly require:

Closed reduction and percutaneous pin fixation.

Major complications include:

Nerve palsy, vascular compromise, compartment syndrome, Volkmann ischemic contracture, cubitus varus, and rare trochlear osteonecrosis.

Orthopaedic Surgery - Subungual Hematoma

Basics

A subungual hematoma is a:

Collection of blood beneath the nail plate

and above the:

Nail bed

of a finger or toe.

It usually follows:

Blunt trauma

that injures the underlying nail-bed soft tissues while the nail plate remains:

Intact or largely intact.

Pain Mechanism

Blood trapped beneath the rigid nail plate creates:

Pressure

against the sensitive:

Nail bed and distal phalanx.

This can produce:

Severe throbbing pain.

Nail-Bed Injury Patterns

Underlying nail-bed injury may consist of:

Simple linear laceration

Stellate laceration

or

Crush injury.

Epidemiology

Subungual hematoma is one of the most common:

Distal digit injuries

seen in:

Emergency departments

and

Outpatient practice.

Age

The injury commonly affects:

Older children

Adolescents

and

Young adults

although it can occur at:

Any age.

Most Commonly Injured Digit

The:

Middle finger

is commonly injured because it projects farther than the adjacent digits and is frequently exposed to:

Crush trauma.

Etiology

The usual cause is:

Blunt trauma to the distal phalanx.

Common Mechanisms

Typical mechanisms include:

Finger caught in a door

Crushing between two objects

Impact from a heavy object

and injuries involving:

Tools or machinery.

Associated Conditions

The most important associated injury is:

Distal phalanx fracture.

Nail-bed laceration may also coexist with:

Crush injury

or

Open fracture.

Diagnosis

Diagnosis is usually based on:

History

and

Physical examination.

Signs and Symptoms

Patients typically present shortly after injury with:

Localized distal finger or toe pain

and a clear history of:

Trauma.

Pain

Pain is often:

Throbbing

and may be disproportionately severe because of:

Pressure beneath the nail plate.

Visible Hematoma

Inspection reveals a:

Dark red

Purple

or

Black discoloration

visible beneath the:

Nail plate.

Nail Deformity

A nail deformity is usually a:

Late finding

and may indicate a previously unrecognized:

Nail-bed injury

or disruption of the:

Nail matrix.

Physical Examination

The examination should evaluate:

Nail integrity

Nail-fold disruption

Extent of hematoma

Tenderness

Swelling

and

Neurovascular status.

Nail Plate

Determine whether the nail plate is:

Intact

Split

Displaced

or detached from the:

Nail folds.

Nail Folds

Inspect the:

Eponychial fold

and

Lateral nail folds

for:

Laceration

or disruption.

Distal Phalanx

Diffuse swelling and marked bony tenderness raise concern for:

Associated distal phalanx fracture.

Neurovascular Examination

Document:

Sensation

Capillary refill

and distal:

Perfusion.

Imaging

Plain Radiographs

Radiographs should be considered when there is concern for:

Distal phalanx fracture

based on mechanism, tenderness, deformity, or substantial crush injury.

Recommended Views

Typical imaging includes:

AP

Lateral

and

Oblique views

of the affected digit.

Differential Diagnosis

Important alternatives include:

Distal phalanx contusion

Distal phalanx fracture without subungual bleeding

Subungual melanoma

and

Pyogenic granuloma.

Subungual Melanoma

A dark lesion under the nail without a convincing history of:

Trauma

or one that persists and evolves should raise concern for:

Melanocytic pathology.

Pyogenic Granuloma

A pyogenic granuloma may develop near the:

Nail fold

and can bleed easily.

It may follow:

Minor penetrating trauma

or manipulation of the:

Cuticle.

Treatment

Management depends on:

Pain

Nail integrity

Associated fracture

and evidence of:

Nail-bed disruption.

General Measures

A painful acute subungual hematoma beneath an intact nail can usually be treated with:

Trephination.

The purpose is to:

Decompress the hematoma

and rapidly reduce:

Pain.

Trephination

Trephination creates one or more small openings in the:

Nail plate

allowing trapped blood to:

Drain.

Modern Size Considerations

Historically, hematomas involving more than approximately:

50% of the nail surface

were treated with nail removal and nail-bed repair.

Modern practice is less dependent on:

Hematoma size alone.

If the nail plate and nail folds are intact and there is no displaced fracture or obvious nail-bed disruption, even a:

Large hematoma

may often be managed successfully with:

Simple trephination.

Indications for Trephination

Trephination is most useful when the hematoma is:

Acute

Painful

and the nail plate remains:

Intact.

Timing

Trephination is most effective during the:

First 24–48 hours

before the blood becomes extensively:

Clotted.

Preparation

The digit and nail should be cleaned using:

Sterile or clean antiseptic technique.

Anesthesia

A digital nerve block is usually:

Not required

for uncomplicated trephination because the nail plate itself is:

Insensitive.

Trephination Methods

The nail may be decompressed using:

Electrocautery

or a carefully rotated:

Large-bore needle.

Electrocautery

A battery-powered cautery device can rapidly create a hole through the:

Nail plate.

The operator stops as soon as blood begins to:

Drain.

Needle Technique

A needle may be rotated gently through the nail plate until the:

Hematoma cavity

is reached.

Care should be taken to avoid injuring the underlying:

Nail bed.

Number of Holes

Usually:

One or two openings

are sufficient for drainage.

Additional openings may be created if drainage remains:

Incomplete.

Pain Relief

Successful decompression typically produces:

Rapid and substantial pain relief.

When Nail Removal Is Appropriate

Nail removal and direct nail-bed inspection may be indicated when there is:

Nail avulsion

Nail-fold disruption

Major nail-plate laceration

Displaced distal phalanx fracture

or obvious:

Nail-bed injury requiring repair.

Associated Fracture

A nondisplaced distal phalanx fracture may be treated with:

Protective splinting

in addition to management of the:

Nail injury.

Displaced Fracture

A displaced fracture may require:

Reduction

and occasionally:

Operative fixation.

Activity

Activity may continue:

As tolerated

provided the injured digit is adequately:

Protected.

Protective Splinting

Patients with associated fracture or substantial fingertip tenderness may benefit from a:

Tip protector

or

Distal phalanx splint.

Physical Therapy

Formal therapy is rarely needed for an uncomplicated:

Subungual hematoma.

Hand Therapy

A hand therapist may provide a custom:

Fingertip protector

when hypersensitivity interferes with:

Work or activity.

Medication

Pain control may include:

Acetaminophen

or

NSAIDs

when medically appropriate.

Antibiotics

Routine prophylactic antibiotics are generally:

Not necessary

after uncomplicated trephination or a clean closed injury.

They may be considered when there is:

Open contamination

Significant soft-tissue injury

or another specific infection-related indication.

Nail-Bed Repair

When a significant nail-bed laceration requires repair, the nail plate may need to be:

Removed.

Anesthesia for Repair

A:

Digital nerve block

provides adequate regional anesthesia for most:

Nail-bed repairs.

Nail Removal

The distal nail edge is gently elevated and separated from the:

Nail bed

and

Eponychial fold

while minimizing additional:

Tissue trauma.

Irrigation

The wound should be thoroughly:

Irrigated

before repair.

Nail-Bed Suturing

Nail-bed lacerations are typically repaired using:

Fine absorbable sutures

such as approximately:

6-0 or 7-0 material.

Nail-Fold Splinting

After nail removal, maintaining the space beneath the:

Proximal nail fold

can help prevent adhesions and later:

Nail deformity.

Nail Replacement

The original nail plate may sometimes be replaced as a:

Biologic splint

if sufficiently intact.

Alternative Splint

If the native nail cannot be used, an appropriate sterile substitute may be placed beneath the:

Eponychial fold.

Dressing

The nail bed should be covered with a:

Nonadherent dressing

followed by protective:

Gauze or fingertip dressing.

Follow-Up

Follow-up depends on the:

Severity of injury.

After Simple Trephination

Patients treated by trephination alone often require only:

As-needed follow-up

if symptoms rapidly improve.

After Nail-Bed Repair

Patients undergoing nail-bed repair should generally be reviewed within approximately:

1 week.

Wound Care

Patients should keep the digit:

Clean

and monitor for:

Increasing redness

Drainage

Swelling

or

Fever.

Prognosis

The prognosis is generally:

Excellent

when associated nail-bed and bony injuries are identified and treated appropriately.

Nail Regrowth

A fingernail may require several:

Months

to grow completely.

Toenails generally take:

Longer.

Complications

Nail Deformity

Damage to the nail bed or matrix may lead to:

Ridging

Fissuring

Splitting

or abnormal:

Nail growth.

Eponychial Adhesions

Failure to preserve the space beneath the:

Eponychial fold

after nail removal may result in:

Adhesion formation

and subsequent:

Nail deformity.

Split Nail

A poorly healed nail-bed laceration may cause a:

Split nail

or a nail that does not adhere normally to the:

Nail bed.

Infection

Infection is uncommon with proper:

Wound care.

However, contaminated injuries or improper drainage can occasionally lead to:

Soft-tissue infection

or

Osteomyelitis.

Persistent Pain

Persistent pain after decompression should raise concern for:

Associated fracture

Incomplete drainage

or another:

Underlying injury.

Patient Monitoring

Patients should be monitored for:

Pain relief

Wound healing

Infection

and normal:

Nail regrowth.

Key Principle

A subungual hematoma is a collection of blood beneath the nail plate following trauma to the nail bed, often producing:

Severe throbbing pain from pressure within the confined nail space.

For an acute painful hematoma with an intact nail and nail folds, treatment usually consists of:

Simple nail trephination, which provides rapid decompression and pain relief.

The historical rule that hematomas involving more than:

50% of the nail

require nail removal is no longer applied rigidly; management depends more on:

Nail integrity, nail-fold injury, associated fracture, and evidence of significant nail-bed disruption.

Nail removal and repair are reserved for injuries with:

Avulsion, major nail disruption, displaced fracture, or a clearly repairable nail-bed laceration.

The overall prognosis is:

Excellent, although inadequately treated nail-bed injuries may lead to:

Permanent nail deformity.

Orthopaedic Surgery - Subtrochanteric Fracture

⸻

Basics

A subtrochanteric fracture is a fracture of the proximal femur occurring between the:

Lesser trochanter

and a point approximately:

5 cm distal to it.

This region is subjected to very high:

Compressive

and

Tensile forces

during normal weight bearing.

⸻

Classification

Numerous classification systems have been described.

From a practical and prognostic standpoint, one of the most important characteristics is:

Fracture stability.

⸻

Stable Versus Unstable Fracture

Stability depends largely on preservation of the:

Medial

and

Posteromedial cortices.

These regions normally resist substantial:

Compressive loading.

⸻

Unstable Fracture

Comminution of the:

Medial or posteromedial cortex

removes an important structural buttress and makes the fracture:

Mechanically unstable.

This increases the risk of:

Varus collapse

Loss of fixation

and

Nonunion.

⸻

General Prevention

Preventive measures include:

Fall prevention in older adults

and

Seat-belt use in motor vehicles.

⸻

Bone Health

Because many low-energy subtrochanteric fractures occur in patients with weakened bone, appropriate evaluation and treatment of:

Osteoporosis

and other metabolic bone disorders can reduce future:

Fragility fracture risk.

⸻

Epidemiology

Subtrochanteric fractures demonstrate a:

Bimodal age distribution.

⸻

Younger Patients

Approximately:

One-third

occur in patients younger than or equal to:

50 years.

These injuries are typically caused by:

High-energy trauma.

⸻

Older Patients

In geriatric patients, subtrochanteric fractures more commonly follow:

Low-energy trauma

such as a:

Fall from standing height.

⸻

Incidence

Historical series report that subtrochanteric fractures account for approximately:

10–34% of proximal femoral or hip fractures.

Reported percentages vary according to how the:

Subtrochanteric region

is defined.

⸻

Risk Factors

Any disorder that decreases:

Bone strength

may predispose to subtrochanteric fracture.

⸻

Generalized Bone Weakness

Examples include:

Osteoporosis

Osteomalacia

and other:

Metabolic bone diseases.

⸻

Focal Bone Weakness

Local structural weakening may occur with:

Metastatic disease

Primary bone tumor

Fibrous dysplasia

or other focal:

Bone lesions.

⸻

Etiology

The injury mechanism differs according to:

Age

and

Bone quality.

⸻

High-Energy Trauma

In young patients with normal bone, common mechanisms include:

Motor vehicle collisions

Falls from significant height

and

Gunshot wounds.

⸻

Low-Energy Trauma

In older patients with osteoporotic bone, a minor fall may generate sufficient force to produce a:

Subtrochanteric fracture.

⸻

Pathological Fracture

A pathological fracture may occur when structurally abnormal bone can no longer tolerate:

Normal physiologic loading.

Potential causes include:

Metastatic carcinoma

Multiple myeloma

Primary bone tumor

and

Metabolic bone disease.

⸻

Biomechanics

The subtrochanteric region experiences some of the highest mechanical forces in the:

Femur.

This contributes to both:

Fracture instability

and the risk of:

Fixation failure.

⸻

Associated Injuries

High-energy subtrochanteric fractures may occur with injuries involving:

The ipsilateral femur

Hip

Pelvis

Spine

Head

or other body regions.

⸻

Trauma Evaluation

Patients with a high-energy mechanism require a:

Complete trauma assessment.

⸻

Hemorrhage

Femoral fractures can be associated with substantial:

Blood loss.

Patients should be monitored for:

Hemodynamic instability

and

Hypovolemic shock.

⸻

Thigh Compartment Syndrome

Compartment syndrome of the thigh is:

Rare

but possible after severe trauma.

Increasing pain, tense swelling, and neurologic abnormalities should prompt:

Urgent evaluation.

⸻

Suspicion for Pathological Fracture

An underlying neoplasm or bone disorder should be considered when the fracture occurs after:

Minimal trauma

or when the patient reports preceding:

Thigh pain

Hip pain

or

Limp.

⸻

Biopsy

If a pathological lesion is suspected, the diagnostic plan should be established before definitive fixation.

In selected cases, this may include:

Biopsy

performed in a manner consistent with future:

Oncologic treatment.

⸻

Diagnosis

The clinical presentation often resembles a:

Femoral shaft

or

Intertrochanteric fracture.

⸻

Signs and Symptoms

Typical findings include:

Severe proximal thigh or hip pain

Swelling

Deformity

and inability to:

Bear weight.

⸻

Nondisplaced Fractures

Some fractures may initially be:

Nondisplaced

and therefore produce less obvious:

Deformity.

⸻

History

The usual history includes:

Trauma

or

Fall.

In pathological fractures, trauma may be:

Minimal or absent.

⸻

Physical Examination

The injured extremity often appears:

Shortened

and the thigh may be:

Swollen.

⸻

Deformity

Varus and rotational deformity may be apparent because of the powerful:

Muscle forces

acting across the fracture.

⸻

Neurovascular Examination

A complete neurovascular examination should document:

Motor function

Sensation

Peripheral pulses

and

Capillary refill.

⸻

Open Fracture

The skin should be examined carefully to exclude:

Open injury.

Even a small wound may communicate with the:

Fracture.

⸻

Laboratory Tests

⸻

Complete Blood Count

A CBC is useful to evaluate:

Hemoglobin

and

Hematocrit

because significant blood loss may accompany:

Femoral fractures.

⸻

Preoperative Testing

Patients likely to undergo surgery should receive appropriate:

Preoperative laboratory evaluation

based on age and:

Medical comorbidity.

⸻

Multiple Myeloma Evaluation

When a pathological fracture is suspected, selected testing may include:

Serum protein electrophoresis

and

Urine protein electrophoresis

to evaluate for:

Plasma-cell disorders.

⸻

Imaging

⸻

Plain Radiographs

Imaging should include:

AP pelvis

AP hip

Lateral hip

and

Full-length AP and lateral femur radiographs.

⸻

Entire Femur Imaging

The entire femur should be visualized because associated fractures may occur and because definitive fixation often requires knowledge of:

Femoral anatomy.

⸻

Femoral Neck

The femoral neck should be assessed carefully for an associated:

Ipsilateral femoral neck fracture.

This is particularly important after:

High-energy trauma.

⸻

Cross-Table Lateral

A:

Cross-table lateral hip view

is preferred in the acute setting.

A frog-leg lateral should generally be avoided because positioning can cause:

Pain

and potentially worsen:

Fracture displacement.

⸻

CT

CT may be useful in selected complex injuries to define:

Fracture morphology

or associated:

Pelvic or proximal femoral injury.

⸻

Pathophysiology of Deformity

Characteristic deformity occurs because the proximal and distal fragments are pulled in different directions by:

Muscle forces.

⸻

Proximal Fragment

The proximal femoral fragment is typically pulled into:

Flexion

Abduction

and

External rotation.

⸻

Flexion

The:

Iliopsoas

pulls the proximal fragment into:

Flexion.

⸻

Abduction

The:

Gluteus medius and minimus

contribute to proximal fragment:

Abduction.

⸻

External Rotation

The short external rotators contribute to:

External rotation

of the proximal fragment.

⸻

Distal Fragment

The distal fragment is pulled:

Proximally

and often into:

Adduction and varus.

⸻

Shortening

Muscular pull across the fracture produces:

Femoral shortening.

⸻

Varus Deformity

Loss of medial support and muscular forces predispose the fracture to:

Varus malalignment.

Recognition of these predictable deforming forces is important during:

Fracture reduction.

⸻

Differential Diagnosis

The major distinction is between:

Traumatic fracture

and

Pathological fracture.

⸻

Additional Differential Considerations

Other proximal femoral injuries include:

Intertrochanteric fracture

Femoral neck fracture

and

Proximal femoral shaft fracture.

⸻

Treatment

⸻

General Measures

Initial management follows standard principles of:

Trauma stabilization.

⸻

ATLS

For patients with major trauma, evaluation should follow:

ATLS principles

with treatment of immediately life-threatening conditions before definitive:

Fracture fixation.

⸻

Temporary Stabilization

Temporary immobilization may help reduce:

Pain

Bleeding

and further:

Soft-tissue injury.

⸻

Traction

Skeletal traction was historically used when definitive fixation was delayed or when nonoperative treatment was planned.

Modern practice generally favors:

Early surgical fixation

when medically feasible.

⸻

Nonoperative Treatment

Nonoperative management is uncommon and is usually reserved for:

Patients who cannot tolerate surgery

or other exceptional situations.

⸻

Limitations of Nonoperative Care

Traction or cast bracing frequently leads to:

Shortening

Rotational deformity

Varus malunion

Delayed union

or

Nonunion.

⸻

Medical Optimization

Important perioperative issues include:

Fluid and blood-volume management

Venous thromboembolism prophylaxis

Pain control

and treatment of:

Pre-existing medical conditions.

⸻

Venous Thromboembolism Prevention

Appropriate prophylaxis should be planned while considering the timing of:

Definitive surgery.

⸻

Activity

Before definitive stabilization, the patient is generally:

Non-weight-bearing.

⸻

Postoperative Weight Bearing

Weight-bearing recommendations depend on:

Fracture stability

Quality of reduction

Fixation construct

and

Bone quality.

⸻

Younger Patients

Historically, younger patients were often started with:

Toe-touch or protected weight bearing

using:

Crutches

or

A walker

during the early postoperative period.

Progression toward full weight bearing was guided by:

Clinical and radiographic healing.

⸻

Older Patients

Older patients are often allowed:

Weight bearing as tolerated

after stable fixation because prolonged restriction may be difficult and can increase:

Medical complications.

⸻

Physical Therapy

Rehabilitation should begin early after stabilization.

⸻

Range of Motion

Patients can usually begin:

Hip

and

Knee range-of-motion exercises

during the early postoperative period.

⸻

Strengthening

Progressive strengthening emphasizes:

Hip abductors

Quadriceps

and overall:

Lower-extremity function.

⸻

Gait Training

Physical therapy also includes:

Transfer training

Walking with assistive devices

and progression toward:

Independent mobility.

⸻

Medication

Significant acute pain often requires:

Short-term opioid analgesia.

⸻

Multimodal Pain Control

Whenever possible, pain treatment should use:

Multimodal analgesia

including:

Acetaminophen

and other appropriate adjuncts to reduce reliance on:

Opioids.

⸻

Surgery

Operative fixation is the treatment of choice for most:

Subtrochanteric fractures.

⸻

Goals of Surgery

The major objectives are to restore:

Femoral length

Rotational alignment

and

Coronal alignment

while preserving the:

Hip abductor lever arm.

⸻

Varus Prevention

Avoidance of:

Varus malreduction

is particularly important because varus increases mechanical stress across:

The fracture

and

Implant.

⸻

Intramedullary Fixation

Modern treatment most commonly uses a:

Cephalomedullary intramedullary nail.

This fixation method places the implant closer to the mechanical axis of the:

Femur

and is advantageous for many:

Unstable fracture patterns.

⸻

Cephalomedullary Nail

A cephalomedullary nail usually includes:

Proximal fixation into the femoral head and neck

and

Distal locking screws.

⸻

Posteromedial Comminution

Cephalomedullary fixation is particularly useful when there is:

Loss of posteromedial cortical support.

⸻

Interlocking Nail

Static interlocking nails may be used in selected patterns when the:

Proximal trochanteric anatomy

permits stable fixation.

⸻

Plate Fixation

A:

95° angled blade plate

is a historical and still occasionally useful option for selected complex fractures or:

Revision procedures.

⸻

Mechanical Environment

Because the subtrochanteric femur experiences high:

Tensile

and

Compressive forces

implant fatigue is a major concern when reduction is poor or healing is:

Delayed.

⸻

Reduction Quality

Successful fixation depends heavily on obtaining:

Near-anatomic alignment

especially restoration of the:

Medial cortex

and avoidance of:

Varus.

⸻

Pediatric Considerations

Subtrochanteric femur fractures are relatively uncommon in:

Children.

⸻

Mechanism in Children

Unless bone is weakened by disorders such as:

Simple bone cyst

Fibrous dysplasia

or

Osteoporosis

these fractures generally result from:

High-energy trauma.

⸻

Femoral Head Blood Supply

Unlike femoral neck fractures, typical pediatric subtrochanteric fractures do not directly endanger the:

Femoral head blood supply.

⸻

Leg-Length Discrepancy

Children may develop:

Leg-length discrepancy

even when no obvious physeal injury is present.

⸻

Rotational Alignment

Attention to:

Leg length

and

Femoral rotation

is especially important during pediatric treatment.

⸻

Pediatric Treatment Options

Treatment may include:

Closed reduction with spica casting

External fixation

or

Internal fixation

depending on:

Age

Fracture pattern

and

Body size.

⸻

Pediatric Intramedullary Nailing

In skeletally immature patients, traditional piriformis-entry rigid nails may endanger the:

Femoral head blood supply.

Alternative entry points or fixation methods are therefore preferred when the:

Proximal femoral physis remains open.

⸻

Follow-Up

Patients should be reviewed soon after:

Surgical fixation.

⸻

Early Review

An initial follow-up around:

1–2 weeks

may assess:

Wound healing

Alignment

and

Implant position.

⸻

Serial Follow-Up

Subsequent visits monitor:

Pain

Weight-bearing progression

Fracture callus

and evidence of:

Union.

⸻

Radiographic Monitoring

Radiographs are typically repeated at regular intervals until:

Solid healing

is demonstrated.

⸻

Prognosis

With appropriate reduction and stable fixation, many patients can return toward their:

Preinjury level of activity.

⸻

Older Patients

In frail geriatric patients, prognosis is also strongly influenced by:

Age

Comorbidities

and

Prefracture mobility.

Historical series of low-energy fractures have demonstrated substantial:

One-year mortality

and loss of:

Independence.

⸻

Historical Outcomes

One older series of patients treated with cephalomedullary nails reported approximately:

34.5% mortality at 1 year.

Among survivors, increased use of:

Walking aids

and greater:

Social dependence

were common.

These values reflect a frail historical population and should not be interpreted as a universal prognosis for every patient.

⸻

Residual Pain

Some survivors continue to experience:

Hip discomfort

although severe disabling pain is less common.

⸻

Reoperation

Historical data have reported reoperation in approximately:

9%

of patients in some geriatric cohorts.

⸻

Nonunion

Nonunion is uncommon with appropriate fixation but remains an important complication because of the high mechanical stresses in this region.

Historical reports have described rates around:

2%

in some modern nail series.

⸻

Complications

The principal complications include:

Nonunion

Malunion

Shortening

and

Implant failure.

⸻

Nonunion

Nonunion should be suspected when there is persistent:

Pain

Tenderness

and lack of radiographic progression toward healing over:

Several months.

⸻

Timing

Persistent symptoms and absent healing at approximately:

3–6 months

may raise concern for:

Delayed union or nonunion.

⸻

Risk Factors for Nonunion

Important factors include:

Varus malreduction

Medial cortical deficiency

Poor fixation

Smoking

Poor bone biology

and premature:

Excessive loading.

⸻

Malunion

Malunion may result in:

Limp

Rotational deformity

Varus alignment

and

Leg-length discrepancy.

⸻

Shortening

Loss of fracture alignment may produce:

Femoral shortening

and compromise:

Gait mechanics.

⸻

Implant Failure

Hardware failure is more likely when the fracture remains:

Unstable

or develops:

Nonunion.

⸻

Plate Failure

Plate constructs may fail through:

Screw pullout

especially in:

Osteoporotic bone.

Revision may require conversion to an:

Intramedullary device

with restoration of:

Alignment and biology.

⸻

Intramedullary Nail Failure

Potential causes include:

Inadequate distal locking

Undersized nail

Poor reduction

and

Fracture extension near the entry site.

⸻

Distal Cortical Penetration

An intramedullary nail may occasionally penetrate the:

Anterior distal femoral cortex

particularly when there is a mismatch between the:

Femoral bow

and

Implant geometry.

⸻

Revision Surgery

Symptomatic nonunion or malunion may require:

Revision fixation

Bone grafting

and occasionally:

Corrective valgus osteotomy.

⸻

Osteotomy

A valgus-producing osteotomy may improve mechanical loading by converting excessive:

Shear forces

into more favorable:

Compressive forces.

⸻

Pediatric Osteonecrosis

Osteonecrosis of the femoral head is uncommon in the fracture itself but may occur in a child if a rigid intramedullary nail is introduced through the:

Piriformis fossa

while the proximal femoral blood supply remains vulnerable.

⸻

Patient Monitoring

Follow-up should assess:

Pain

Wound healing

Neurovascular status

Alignment

Leg length

Rotation

Weight-bearing ability

and progression toward:

Fracture union.

⸻

Key Principle

A subtrochanteric fracture is a proximal femoral fracture extending from the lesser trochanter to approximately 5 cm distally.

The region experiences very high:

Mechanical forces, and loss of the medial or posteromedial cortex makes the fracture particularly:

Unstable.

Young patients usually sustain these injuries through:

High-energy trauma, whereas older patients typically sustain them after:

Low-energy falls in osteoporotic bone.

Most fractures are treated surgically, commonly with a:

Cephalomedullary intramedullary nail, with the goals of restoring:

Femoral length, rotation, and alignment while avoiding varus deformity.

Important complications include:

Nonunion, malunion, shortening, implant failure, and persistent functional impairment.

Orthopaedic Surgery - Subacromial Injection

Basics

Subacromial injection is a commonly used office-based procedure designed to:

Reduce pain and inflammation

within the:

Subacromial space.

By improving pain and shoulder motion, the injection may allow patients to participate more effectively in:

Physical therapy

and regain:

Strength and function.

Role of Exercise

Injection therapy is generally more effective when combined with:

Exercise-based rehabilitation.

Physical therapy helps address:

Rotator cuff weakness

Scapular dyskinesis

and limitations in:

Range of motion.

Common Uses

Subacromial injection is commonly used for:

Rotator cuff tendinopathy

Calcific tendinopathy

Subacromial bursitis

Subacromial impingement

and selected cases of:

Adhesive capsulitis.

Diagnostic and Therapeutic Uses

The injection may be used as:

A therapeutic treatment

or

A diagnostic test.

Therapeutic Injection

Therapeutic injections usually include:

Corticosteroid

with or without:

Local anesthetic.

The primary goal is reduction of:

Pain and inflammation.

Diagnostic Injection

A local anesthetic such as:

Lidocaine

may be used to determine whether the patient’s symptoms originate from the:

Subacromial space.

Marked short-term pain relief after injection supports the diagnosis of a:

Subacromial pain generator.

Emerging Injectates

Other agents such as:

Platelet-rich plasma

and

Hyaluronic acid

have been investigated for shoulder disorders.

Their role in routine subacromial treatment remains:

Less established than corticosteroid injection.

Multimodal Treatment

Subacromial injection is usually used after or together with:

Physical therapy

NSAIDs

Activity modification

and other:

Nonoperative measures.

Injection Approaches

Common approaches include:

Posterior

Lateral

and

Anterior approaches.

Posterior and lateral approaches are particularly common and generally demonstrate:

Similar clinical effectiveness.

Ultrasound Guidance

Ultrasound may be used to improve confidence that the needle enters the:

Subacromial-subdeltoid bursa.

Landmark-guided injections can also be effective when performed by an:

Experienced clinician.

Indications

Potential indications include:

Subacromial bursitis

Rotator cuff tendinopathy

Partial rotator cuff tears

Subacromial impingement

Painful os acromiale

and selected cases of:

Calcific tendinopathy.

Adhesive Capsulitis

Subacromial injection may occasionally be used in patients with:

Adhesive capsulitis.

However, because the primary pathology is within the:

Glenohumeral capsule

an:

Intra-articular glenohumeral injection

may be more directly beneficial.

Rotator Cuff Tears

Subacromial injection can reduce associated:

Bursal inflammation

and

Pain.

However, it does not repair the underlying:

Tendon tear.

Treatment