Is Carhart notch an accurate predictor of otitis media with effusion?

Shishegar, Mahmood; Faramarzi, Mohammad; Esmaili, N.; Heydari, Seyed Taghi

doi:10.1016/j.ijporl.2009.09.040

Cited by 7 publications

(8 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Kumar et al detected glue fluid during myringotomy in 36 of 37 ears with SOM and CN, and found the ABG levels of the 47 patients were 10 dB and above(7). Shishegar et al reported the mean ABG level was 25.9 dB in CN-positive patients with SOM(11). In our study, we determined the preoperative ABG level was 23.8 dB in patients with SOM and CN positive.…”

mentioning

confidence: 51%

“…As a result, occlusion of the oval or round window for any reason may cause a false depression in BC at 2 kHz on the audiogram. (7,11). When we evaluated the improvement in the mean postoperative ABG and BC threshold values compared to the preoperative period, we found a significant decrease in ABG at the frequencies of 0.5 kHz, 1 kHz, 2 kHz, and 4 kHz (p<0.001).…”

Section: Discussionmentioning

confidence: 85%

“…In a study by Shishegar et al examining patients with SOM, the CN positivity rate was found to be 44.9%. The authors also separately discussed the CN-positive SOM cases based on the presence of dullness, redness, and swelling in the tympanic membrane and reported their rate as 25.3% (11). Kumar et al, evaluating 95 ears with SOM, detected CN in 37 (38.9%) ears (7).…”

Section: Discussionmentioning

confidence: 99%

“…The CN positivity rate might have been higher in our study considering that we used only 2 kHz frequency for CN positivity. Previous studies used different frequencies like 0.5, 1, 2 or 4 kHz to evaluate CN positivity (9,11). It may be suggested that the CN definition should be redefined in order to ensure integrity in the literature and for more accurate comparison of studies.…”

Section: Discussionmentioning

confidence: 99%

“…Kumar et al also stated that CN was a very important indicator providing an understanding of the presence of glue fluid in myringotomy in patients with SOM and concluded that myringotomy should be performed in cases with CN positivity, type B curve in the tympanogram, and an ABG of ≥30 dB(7). Similarly, in a study by Shishegar et al, a strong correlation was found between the presence of glue fluid in the middle ear and CN positivity, type B tympanogram, and ABG >20 dB(11).…”

mentioning

confidence: 92%

See 4 more Smart Citations

Evaluation of Carhart’s Notch in Patients with Serous Otitis Media

Dinç¹,

Kumbul²,

Bilgin³

et al. 2022

tr-ent

View full text Add to dashboard Cite

Objective: To investigate the changes in bone-conduction and air-bone gap in patients with serous otitis media and to evaluate the presence of Carhart's notch. Material and Methods: Patients with unilateral serous otitis media were included in the study. Audiometric evaluation comprised air-conduction and bone-conduction hearing thresholds, and air-bone gap values. The preoperative and postoperative pure tone audiometry results of 45 patients were compared in terms of the air-bone gap and bone-conduction thresholds. Results: Carhart's notch was present in 17 (37.8%) patients preoperatively. For pure tone audiometry, there was a statistically significant decrease in air-bone gap at all frequencies postoperatively. The postoperative decrease in the bone-conduction thresholds was statistically significant only at 2 kHz. In the postoperative period, a 4.7 dB improvement was observed in the bone-conduction threshold at 2 kHz for patients with Carhart's notch. Conclusion:Carhart's notch may be present in patients with serous otitis media. It is not specific to otosclerosis.

show abstract

mentioning

confidence: 51%

Section: Discussionmentioning

confidence: 85%