Diseases of the Ear — Flashcards

Flashcard 91: _____ is an important landmark to locate the mastoid antrum in mastoid surgery

Answer: MacEwens (suprameatal) triangle

Flashcard 92: In impedance audiometry (tympanometry), a **flat curve** (Type B tympanogram) is characteristically seen in:

Answer: Serous otitis media (SOM)

Extra: A Type B (flat) tympanogram indicates restricted mobility of the tympanic membrane (reduced compliance) with no discernable peak. **Common causes:** - **Serous otitis media (SOM)** / Otitis media with effusion (OME) - ASOM (stage of effusion) - Adhesive otitis media - Tympanic membrane perforation (presents with high ear canal volume) **Note on Type C:** A tympanogram with a peak **shifted to the negative side** (<-100 daPa) is **Type C**, typically seen in Eustachian tube dysfunction or early stages of SOM.

Flashcard 93: What is the treatment of tubal occlusion phase of ASOM?_____

Answer: Decongestants

Flashcard 94: What is the site of tenderness in acute mastoiditis?_____

Answer: McEwen's triangle

Flashcard 95: Keratosis obturans is associated with _____ of the meatus

Answer: widening

Flashcard 96: Glomus jugulare tumor invades the _____tympanum.

Answer: hypo

Flashcard 97: The fluid in Serous Otitis Media (SOM) is ______ (sterile/infected).

Answer: Sterile

Flashcard 98: ET block and retraction of TM is seen in the stage of _____ of ASOM

Answer: tubal occlusion

Flashcard 99: Schwartze sign is seen in _____

Answer: active otosclerosis

Flashcard 100: _____ abscess, can occur as a complication of mastoiditis, which forms when pus breaks through the medial tip of mastoid and into the sheath of SCM

Answer: Bezold