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Emergency And Acute Medicine – Foreign Body in the ear
Basics Description
Foreign bodies lodged in the external auditory canal are common, particularly in children younger than 8 years. The canal is a cartilaginous and bony passage lined with highly sensitive periosteum, making removal painful; small children may require procedural sedation or general anesthesia. Foreign bodies often lodge at the junction of the cartilaginous and bony canal or at the isthmus. The canal is innervated by the facial, glossopharyngeal, and vagus nerves.
Inanimate objects often present late because children may delay reporting. The right ear is more commonly involved due to right-handedness. Predisposing factors include cerumen impaction, pica, and psychiatric illness.
Complications include canal laceration, tympanic membrane perforation (often iatrogenic), otitis externa, temporomandibular joint erosion, parapharyngeal abscess, mastoiditis, meningitis, and brain abscess. Button batteries are particularly dangerous due to electrical injury and pressure necrosis, often causing rapid tissue destruction.
Etiology
Children commonly insert beads, stones, paper, seeds, popcorn kernels, beans, toys, and button batteries. Adults more often present with cotton-swab tips, earplugs, insects (cockroaches most common in the US), or concealed illicit drugs.
Diagnosis Signs And Symptoms
Symptoms include unilateral ear pain, fullness, decreased hearing, crying in infants, buzzing or movement sensation with live insects, nausea, dizziness, ipsilateral tearing, itching, bleeding, or purulent discharge.
History should include prior removal attempts and possible trauma.
Physical examination requires careful otoscopy before and after removal to identify the object type, assess swelling risk, evaluate for otitis externa, retained fragments, or tympanic membrane perforation. A bilateral ear exam and inspection of nostrils are essential, especially in children and psychiatric patients. Concerning findings such as vertigo, nystagmus, hearing loss, facial nerve weakness, or severe pain warrant ENT consultation.
Essential Workup
A careful otoscopic examination is the cornerstone. Identify the foreign body and minimize patient discomfort before attempting removal.
Diagnosis Tests And Interpretation
Laboratory studies are not indicated. CT imaging is reserved for suspected infectious, erosive, or intracranial complications. Otomicroscopy may assist when standard techniques fail.
Differential Diagnosis
Cerumen impaction, otitis externa, canal hematoma, granuloma, trauma, tympanic membrane perforation, residual inflammation after self-removal, and tumors.
Treatment
Prehospital care for suspected live insects includes instillation of warm lidocaine or mineral oil to immobilize the insect; field removal attempts are discouraged.
In the emergency department, ensure adequate lighting, proper head immobilization, and analgesia. Lidocaine (1–2%) may be instilled topically or injected into the canal walls. Procedural sedation is recommended for children or uncooperative adults and should be used early to prevent traumatic repeated attempts.
Removal techniques depend on object type: irrigation for non–button battery objects; forceps, hooks, suction, Fogarty catheter, or cyanoacrylate glue for selected cases; acetone for Styrofoam or adhesive materials. Vegetable matter should not be irrigated. Button batteries must never be irrigated and require urgent removal. Live insects should be killed first with lidocaine, alcohol, or mineral oil before extraction. Sharp objects and complicated cases require ENT referral.
Medication
Analgesia or sedation may include fentanyl, ketamine, or midazolam. Topical antibiotic-steroid drops are indicated if canal abrasion or infection is suspected. Oral antibiotics are reserved for tympanic membrane perforation or secondary infection.
Follow Up Disposition
Admission is required for button batteries that cannot be removed.
Discharge is appropriate once the foreign body is removed or if a nonhazardous object cannot be safely removed in the ED.
ENT referral is indicated for failed removal, complications, immunocompromised patients, or significant trauma.
Follow Up Recommendations
Advise patients not to insert objects into the ear. Provide short-term analgesia after traumatic removal. Treat otitis externa with topical antimicrobials. Avoid water submersion if trauma or infection is present and arrange ENT follow-up when indicated.
Key Practice Insights And Avoidable Errors
Early use of procedural sedation improves success and reduces complications. Never irrigate an ear containing a button battery, as this can rapidly worsen tissue necrosis.
Basics Description
Foreign bodies lodged in the external auditory canal are common, particularly in children younger than 8 years. The canal is a cartilaginous and bony passage lined with highly sensitive periosteum, making removal painful; small children may require procedural sedation or general anesthesia. Foreign bodies often lodge at the junction of the cartilaginous and bony canal or at the isthmus. The canal is innervated by the facial, glossopharyngeal, and vagus nerves.
Inanimate objects often present late because children may delay reporting. The right ear is more commonly involved due to right-handedness. Predisposing factors include cerumen impaction, pica, and psychiatric illness.
Complications include canal laceration, tympanic membrane perforation (often iatrogenic), otitis externa, temporomandibular joint erosion, parapharyngeal abscess, mastoiditis, meningitis, and brain abscess. Button batteries are particularly dangerous due to electrical injury and pressure necrosis, often causing rapid tissue destruction.
Etiology
Children commonly insert beads, stones, paper, seeds, popcorn kernels, beans, toys, and button batteries. Adults more often present with cotton-swab tips, earplugs, insects (cockroaches most common in the US), or concealed illicit drugs.
Diagnosis Signs And Symptoms
Symptoms include unilateral ear pain, fullness, decreased hearing, crying in infants, buzzing or movement sensation with live insects, nausea, dizziness, ipsilateral tearing, itching, bleeding, or purulent discharge.
History should include prior removal attempts and possible trauma.
Physical examination requires careful otoscopy before and after removal to identify the object type, assess swelling risk, evaluate for otitis externa, retained fragments, or tympanic membrane perforation. A bilateral ear exam and inspection of nostrils are essential, especially in children and psychiatric patients. Concerning findings such as vertigo, nystagmus, hearing loss, facial nerve weakness, or severe pain warrant ENT consultation.
Essential Workup
A careful otoscopic examination is the cornerstone. Identify the foreign body and minimize patient discomfort before attempting removal.
Diagnosis Tests And Interpretation
Laboratory studies are not indicated. CT imaging is reserved for suspected infectious, erosive, or intracranial complications. Otomicroscopy may assist when standard techniques fail.
Differential Diagnosis
Cerumen impaction, otitis externa, canal hematoma, granuloma, trauma, tympanic membrane perforation, residual inflammation after self-removal, and tumors.
Treatment
Prehospital care for suspected live insects includes instillation of warm lidocaine or mineral oil to immobilize the insect; field removal attempts are discouraged.
In the emergency department, ensure adequate lighting, proper head immobilization, and analgesia. Lidocaine (1–2%) may be instilled topically or injected into the canal walls. Procedural sedation is recommended for children or uncooperative adults and should be used early to prevent traumatic repeated attempts.
Removal techniques depend on object type: irrigation for non–button battery objects; forceps, hooks, suction, Fogarty catheter, or cyanoacrylate glue for selected cases; acetone for Styrofoam or adhesive materials. Vegetable matter should not be irrigated. Button batteries must never be irrigated and require urgent removal. Live insects should be killed first with lidocaine, alcohol, or mineral oil before extraction. Sharp objects and complicated cases require ENT referral.
Medication
Analgesia or sedation may include fentanyl, ketamine, or midazolam. Topical antibiotic-steroid drops are indicated if canal abrasion or infection is suspected. Oral antibiotics are reserved for tympanic membrane perforation or secondary infection.
Follow Up Disposition
Admission is required for button batteries that cannot be removed.
Discharge is appropriate once the foreign body is removed or if a nonhazardous object cannot be safely removed in the ED.
ENT referral is indicated for failed removal, complications, immunocompromised patients, or significant trauma.
Follow Up Recommendations
Advise patients not to insert objects into the ear. Provide short-term analgesia after traumatic removal. Treat otitis externa with topical antimicrobials. Avoid water submersion if trauma or infection is present and arrange ENT follow-up when indicated.
Key Practice Insights And Avoidable Errors
Early use of procedural sedation improves success and reduces complications. Never irrigate an ear containing a button battery, as this can rapidly worsen tissue necrosis.
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