Electrically evoked stapedius reflex threshold and its clinical contribution of cochlear implantations.
- Author:
Xue-jun JIANG
1
;
Hui-jun YANG
;
Lian HUI
;
Ning YANG
Author Information
- Publication Type:Journal Article
- MeSH: Adolescent; Adult; Auditory Threshold; Child; Child, Preschool; Cochlear Implantation; Cochlear Implants; Female; Humans; Infant; Male; Reflex, Acoustic; physiology; Stapedius; physiology; Young Adult
- From: Chinese Journal of Otorhinolaryngology Head and Neck Surgery 2007;42(10):735-738
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate and measure the electrically evoked stapedius reflex threshold (ESRT) and the maximum comfortable level (MCL), the feasibility of using objective index of the fitting of speech processor was evaluated.
METHODSThe relationship of ESRT and MCL was conducted by measuring the ESRT and MCL of 28 Medel Combi 40 + cochlear implant users from August 2003 to April 2006.
RESULTSThe incidence of ESRT of 10 patient during operation was 78.3% (94/120), and the incidence 3 months after the operation was 82.5% (99/120). The incidence of ESRT in 3 patients with Large vestibular aqueduct syndrome was 47.2% (17/36). The ESRT and MCL of each electrode of those 28 patients after operation were compared, the result was shown as following: (1) 247 electrodes' MCL were greater than ESRT; (2) 14 electrodes' MCL were equal to ESRT; (3) 46 electrodes' MCL were smaller than ESRT. The average of ESRT after operation was (677.1 +/- 109.8) cu, the average of MCL was (732.3 +/- 114.8) cu. ESRT was smaller than MCL (t = 11.37, P < 0.05).
CONCLUSIONSThe cochlear implantations must be in normal working condition when ESR was positive. ESRT is a useful method to map the fitting of speech processor.
