22 January 2025 : Database Analysis
Role of the Carhart Effect and Outcomes from Surgery: A Retrospective Study of 532 Patients with Conductive Hearing Loss Due to Otosclerosis, Otitis Media with Effusion, and Chronic Otitis Media
Kamila Szpak
1ABCDEF, Agnieszka Wiatr 2BCDE, Maciej Wiatr 2ADEG*
DOI: 10.12659/MSM.947061
Med Sci Monit 2025; 31:e947061
Table 6 Association of depth of Carhart effect assessed preoperatively with change in average cochlear reserve after surgical treatment in patients with type 1 tympanoplasty.
| Carhart effect | n | ABG Delta Average (dB) | ABG Delta SD (dB) | ABG Delta Me (dB) | ABG Delta Min (dB) | ABG Delta Max (dB) | COM Type 1 tympanoplasty |
|---|---|---|---|---|---|---|---|
| <15 dBsmall TM defect, unrelated to the attachment of the malleus | 87 | 4.2 | 9.8 | 3.8 | −27.5 | 23.8 | |
| >15 dBlarge TM defect, covering its central part | 38 | 7.5 | 8.8 | 7.5 | −1.3 | 16.3 | =0.038 |
| COM – chronic otitis media; n – number of patients; ABG – air-bone gap; TM – tympanic membrane; dB – decibel; – significance level; SD – standard deviation; Me – median; Min – minimum; Max – maximum; Delta – shift in BC after performed treatment. | |||||||