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Emergency And Acute Medicine – Retro-Orbital Hematoma
Retro-orbital hematoma (ROH), also known as retrobulbar hematoma, is a rare but vision-threatening complication of orbital trauma or facial surgery. It involves accumulation of blood behind the globe, leading to rapidly increasing intraorbital pressure and orbital compartment syndrome. Elevated pressure compromises venous outflow and arterial inflow to the retina and optic nerve, resulting in tissue ischemia. Permanent vision loss may occur within 90 minutes, with irreversible damage possible by 120 minutes. Prompt recognition and immediate decompression, often via lateral canthotomy and inferior cantholysis, are critical and may need to be performed in the emergency department. Frequent reassessment is mandatory because hematoma progression can be rapid, and some patients may be unconscious or unable to report symptoms.
Retro-orbital hematoma may occur following blunt or penetrating orbital trauma, orbital wall fractures, facial fracture repair, blepharoplasty, endoscopic sinus surgery, retrobulbar anesthesia, or other periocular procedures. Rapid bleeding into the confined orbital space increases pressure, leading to proptosis and stretching of the optic nerve, further contributing to decreased visual acuity.
Patients typically present with a history of recent orbital trauma or facial surgery and complaints of eye pain and vision changes. Examination findings include decreased visual acuity, proptosis, increased intraocular pressure (IOP), diplopia, pain with eye movement, decreased extraocular movements, and a relative afferent pupillary defect with preserved consensual response. Nausea and vomiting may occur due to increased orbital pressure. Because patients may be unconscious after trauma, a high index of suspicion is essential.
Diagnosis is primarily clinical. Immediate evaluation should include assessment of visual acuity, pupillary response, extraocular movements, and IOP measurement. CT scan of the orbits is the imaging gold standard but should never delay emergent decompression if orbital compartment syndrome is suspected. Bedside ultrasound may demonstrate the “guitar-pick” sign, reflecting posterior globe tenting, but sensitivity and specificity are not well established. There are no diagnostic laboratory tests.
The differential diagnosis includes orbital fracture, retro-orbital edema, orbital emphysema, blow-in fractures, orbital roof fractures with brain herniation, intracranial hemorrhage, globe rupture, and other causes of post-traumatic visual loss. A ruptured globe is a contraindication to lateral canthotomy and must be excluded before performing the procedure.
Management begins with airway, breathing, and circulation stabilization. Immediate ophthalmology consultation is required; however, consultation should not delay decompression when indicated. Emergent lateral canthotomy and inferior cantholysis is the definitive treatment for orbital compartment syndrome. Indications include markedly elevated IOP (typically >40 mm Hg), proptosis with decreased vision, afferent pupillary defect, or a tense orbit in an unconscious patient. The procedure involves antiseptic preparation, local anesthesia, clamping and incising the lateral canthus, and releasing the inferior canthal tendon to relieve pressure. Prompt decompression can be sight-saving.
Adjunctive medical therapies may include intravenous mannitol to reduce intraocular pressure, acetazolamide (unless contraindicated), and high-dose methylprednisolone, although these should not replace surgical decompression. Hyperbaric oxygen has been described but is not first-line therapy.
All patients with suspected retro-orbital hematoma require hospital admission for observation, definitive management, and evaluation for associated injuries. They should not be discharged from the emergency department. Delayed diagnosis is a major pitfall and may occur due to inadequate examination, lack of suspicion, absence of tonometry equipment, waiting for imaging, or delayed specialist arrival. Early recognition and rapid decompression are essential to prevent permanent vision loss.
Retro-orbital hematoma (ROH), also known as retrobulbar hematoma, is a rare but vision-threatening complication of orbital trauma or facial surgery. It involves accumulation of blood behind the globe, leading to rapidly increasing intraorbital pressure and orbital compartment syndrome. Elevated pressure compromises venous outflow and arterial inflow to the retina and optic nerve, resulting in tissue ischemia. Permanent vision loss may occur within 90 minutes, with irreversible damage possible by 120 minutes. Prompt recognition and immediate decompression, often via lateral canthotomy and inferior cantholysis, are critical and may need to be performed in the emergency department. Frequent reassessment is mandatory because hematoma progression can be rapid, and some patients may be unconscious or unable to report symptoms.
Retro-orbital hematoma may occur following blunt or penetrating orbital trauma, orbital wall fractures, facial fracture repair, blepharoplasty, endoscopic sinus surgery, retrobulbar anesthesia, or other periocular procedures. Rapid bleeding into the confined orbital space increases pressure, leading to proptosis and stretching of the optic nerve, further contributing to decreased visual acuity.
Patients typically present with a history of recent orbital trauma or facial surgery and complaints of eye pain and vision changes. Examination findings include decreased visual acuity, proptosis, increased intraocular pressure (IOP), diplopia, pain with eye movement, decreased extraocular movements, and a relative afferent pupillary defect with preserved consensual response. Nausea and vomiting may occur due to increased orbital pressure. Because patients may be unconscious after trauma, a high index of suspicion is essential.
Diagnosis is primarily clinical. Immediate evaluation should include assessment of visual acuity, pupillary response, extraocular movements, and IOP measurement. CT scan of the orbits is the imaging gold standard but should never delay emergent decompression if orbital compartment syndrome is suspected. Bedside ultrasound may demonstrate the “guitar-pick” sign, reflecting posterior globe tenting, but sensitivity and specificity are not well established. There are no diagnostic laboratory tests.
The differential diagnosis includes orbital fracture, retro-orbital edema, orbital emphysema, blow-in fractures, orbital roof fractures with brain herniation, intracranial hemorrhage, globe rupture, and other causes of post-traumatic visual loss. A ruptured globe is a contraindication to lateral canthotomy and must be excluded before performing the procedure.
Management begins with airway, breathing, and circulation stabilization. Immediate ophthalmology consultation is required; however, consultation should not delay decompression when indicated. Emergent lateral canthotomy and inferior cantholysis is the definitive treatment for orbital compartment syndrome. Indications include markedly elevated IOP (typically >40 mm Hg), proptosis with decreased vision, afferent pupillary defect, or a tense orbit in an unconscious patient. The procedure involves antiseptic preparation, local anesthesia, clamping and incising the lateral canthus, and releasing the inferior canthal tendon to relieve pressure. Prompt decompression can be sight-saving.
Adjunctive medical therapies may include intravenous mannitol to reduce intraocular pressure, acetazolamide (unless contraindicated), and high-dose methylprednisolone, although these should not replace surgical decompression. Hyperbaric oxygen has been described but is not first-line therapy.
All patients with suspected retro-orbital hematoma require hospital admission for observation, definitive management, and evaluation for associated injuries. They should not be discharged from the emergency department. Delayed diagnosis is a major pitfall and may occur due to inadequate examination, lack of suspicion, absence of tonometry equipment, waiting for imaging, or delayed specialist arrival. Early recognition and rapid decompression are essential to prevent permanent vision loss.
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