OBJECTIVES: To analyze changes in bone conduction (BC) thresholds before and after stapedotomy in @entity1 with clinical @entity8719 with a focus on the Carhart notch, which is defined as a significant loss of BC at a certain audiometric frequency. METHODOLOGY: Retrospective case review of pure tone audiometry (PTA) in 213 @entity1 who underwent a stapedotomy at a tertiary referral center between 2004 and 2011. The @entity1 were grouped by age and the frequency of the Carhart notch. The non-operated ear was also evaluated. RESULTS: The Carhart notch was present on pre-operative audiometry in 158 (74%) @entity1 at 0.5 (n = 18, 8.45%), 1 (n = 25, 11.70%), or 2 kHz (n = 115, 54.0%). We measured a mean postoperative improvement in BC of 7.5, 8.4, and 8.8 dB @entity1733 . Pre-operatively, 55 (25.8%) @entity1 did not exhibit a typical notch configuration. The mean gain in BC, defined on PTA according to the AAO-HNS criteria (0.5, 1, 2 and 3, or 4 kHz), was 1.8 dB @entity1733 after stapedotomy. CONCLUSION: The Carhart notch was not solely related to the 2 kHz frequency. The greatest gain in BC after stapedotomy for @entity8719 occurred at the notch frequency.

XXXX : Shift in bone conduction after stapedotomy.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity1733 :: ('MESH:C538324', 'Disease') :: ['HL'] @entity8719 :: ('MESH:D010040', 'Disease') :: ['otosclerosis']
@entity8719 :: (MESH:D010040,Disease) :: ['Otosclerosis']
