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Emergency and Acute Medicine – Otologic Trauma
Otologic trauma involves injury to the external, middle, or inner ear and may result from blunt, penetrating, barotrauma, thermal, chemical, or blast mechanisms. Injuries to the pinna are particularly concerning because auricular cartilage lacks a direct blood supply and depends on the perichondrium for nutrition. Disruption of this relationship, especially from hematoma formation, can lead to ischemia, perichondritis, cartilage necrosis, and permanent deformity such as cauliflower ear. Penetrating injuries and bite wounds increase the risk of cartilage infection.
The middle ear is an air-filled cavity containing the ossicles and is vulnerable to pressure-related injuries such as blasts or diving accidents. Because it is bordered by the temporal and mastoid bones and adjacent to the cranial vault, fractures in this region may result in cerebrospinal fluid otorrhea or rhinorrhea and disruption of the vestibular system. The facial nerve traverses the middle ear, and injury can result in peripheral facial nerve paralysis. Pediatric patients with otologic trauma should always be evaluated for possible nonaccidental injury.
Patients may present with severe ear pain, bleeding, or visible deformity of the auricle. Auricular hematomas typically appear as bluish, fluctuant, or doughy swellings of the pinna and are associated with loss of normal contour. Lacerations, partial avulsions, or complete amputations may be seen. Signs of middle ear trauma include decreased hearing, tinnitus, vertigo, nystagmus, facial nerve weakness, and canal drainage. Partial hearing loss suggests tympanic membrane rupture, whereas complete hearing loss raises concern for ossicular chain or inner ear injury. Findings suggestive of basilar skull fracture include hemotympanum, Battle sign, and cerebrospinal fluid leakage from the ear or nose.
History should focus on the mechanism of injury, associated trauma, prior otologic disease, and medication use. Physical examination must include a complete head and neck evaluation with careful inspection of the pinna, external auditory canal, tympanic membrane, cranial nerves, and hearing assessment. Tuning fork tests such as Weber and Rinne are useful to differentiate conductive from sensorineural hearing loss. Concomitant injuries must always be excluded in trauma patients.
Diagnosis is primarily clinical. Wound cultures are reserved for signs of infection. Imaging with head or facial CT is indicated when intracranial injury or skull fracture is suspected, while CT of the temporal bone without contrast is recommended for significant middle ear injury or facial nerve involvement.
Initial management begins with standard trauma assessment and stabilization, including airway, breathing, and circulation. Injured ears should be covered with sterile dressings. If the auricle is amputated, it should be wrapped in moist gauze, placed in a plastic bag, and kept cool for possible reattachment. Adequate anesthesia is essential and may be achieved through auricular nerve blocks or a circumferential ring block at the base of the pinna.
Auricular hematomas require prompt drainage, ideally within 72 hours, to reapproximate the perichondrium and cartilage and prevent necrosis. Small, nonclotted hematomas may be aspirated, while larger or clotted collections are best managed with incision and drainage followed by a firm pressure dressing. Antistaphylococcal antibiotics are typically given for 7–10 days. Reaccumulation requires repeat drainage and possibly wick placement.
Lacerations should be thoroughly cleaned and debrided. Simple lacerations can be closed with nonabsorbable monofilament sutures and a pressure dressing, while exposed cartilage must be carefully covered to prevent perichondritis. Human or animal bite wounds warrant prophylactic antibiotics, most commonly amoxicillin–clavulanate. Small avulsions less than 2 cm may survive as grafts, but larger avulsions require urgent consultation with otolaryngology or plastic surgery.
Patients may be discharged if they can tolerate oral antibiotics, have no serious associated injuries, and can ensure close follow-up. Admission is indicated for patients with significant associated trauma, immunosuppression with infection, perichondritis, chondritis, or need for intravenous antibiotics. Follow-up is recommended within 24 hours for auricular hematomas to assess for reaccumulation and within five days for suture evaluation or removal.
A key clinical principle is that failure to promptly recognize and adequately treat auricular hematomas can result in permanent deformity. Early drainage, proper pressure dressing, and close follow-up are essential to prevent long-term complications.
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