Trough-shaped curve in audiometry is seen in
Correct Answer: Congenital SNHL
Description: Trough shaped curve (B-type) in audiometry is seen in secretory otitis media. Type A -Normal tympanogram. Type As- Compliance is lower at or near ambient air pressure. Seen in fixation of ossicles, e.g. otosclerosis or malleus fixation. Type Ad- High compliance at or near ambient pressure. Seen in the ossicular discontinuity or thin and lax tympanic membrane. Type B - flat or dome-shaped graph- No change in compliance with pressure changes. Seen in middle ear fluid or thick tympanic membrane. Type C- Maximum compliance occurs with negative pressure in excess of 100 mm H2O. Seen in a retracted tympanic membrane and may show some fluid in middle ear. Ref: Dhingra; 6th Edition; pg no 24
Category:
ENT
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now