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    Otologic Trauma

    Otologic Trauma is a topic covered in the 5-Minute Emergency Consult.

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    Basics

    Description

    Pinna
    • Ear cartilage has no blood supply and isnutritionally dependent on perichondrium
    • Hematomas often disrupt perichondrium and cartilage
      • Can lead to:
        • Ischemia
        • Perichondritis
        • Necrosis
        • Cauliflower ear
    • Penetrating injuries or bite wounds may lead to infection of cartilage

    Middle Ear
    • Air-space cavity containing ossicles; susceptible to injuries disrupting pressure (blast, diving)
    • Bordered by medial cranial fossa (including temporal and mastoid bones)
    • Traumatic fractures can lead to CSF leak (otorrhea/rhinorhea)
      • May disrupt enclosed vestibular system
    • Facial nerve passes through cavity—injury to cavity may cause peripheral nerve paralysis

    Etiology

    • Blunt trauma:
      • Contact sports such as wrestling
      • Motorcycle helmets
    • Penetrating trauma such as tympanic membrane (TM) perforation from cotton swabs
    • Human or animal bites
    • Blast injury
    • Lightning injury:
      • TM and ossicular disruptions occur in 50% of lightning strikes
    • Chemical exposure
    • Thermal injury
    • Diving injuries:
      • Inner ear barotrauma
      • TM rupture

    Pediatric Considerations
    Consider nonaccidental trauma

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    Citation

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    TY - ELEC T1 - Otologic Trauma ID - 307548 ED - Barkin,Adam Z, ED - Barkin,Roger M, ED - Hayden,Stephen R, ED - Rosen,Peter, ED - Schaider,Jeffrey J, ED - Shayne,Philip, ED - Wolfe,Richard E, BT - 5-Minute Emergency Consult UR - https://emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307548/all/Otologic_Trauma PB - Lippincott Williams & Wilkins ET - 5 DB - Emergency Central DP - Unbound Medicine ER -