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ENT · Nose: acoustic rhinometry
Sample itemA surgeon wants an objective, non-invasive measurement of the cross-sectional area and volume of the nasal cavity before and after turbinate surgery. Which test provides this?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Acoustic rhinometry
Acoustic rhinometry sends a sound pulse into the nose and analyses the reflections to plot cross-sectional area against distance, identifying the narrowest area (usually the nasal valve or head of the inferior turbinate). It needs no active airflow, unlike rhinomanometry.
Option by option
A. Acoustic rhinometry (correct)
Correct. Sound reflections give area against distance.
B. Saccharin test
The saccharin test assesses mucociliary clearance.
C. Rhinomanometry
Rhinomanometry measures resistance, not area.
D. Skin prick test
Skin prick testing detects allergy.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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