[Results of chorda tympani nerve application or no in tympanoplasty].
OBJECTIVE
To demonstrate the effect of chorda tympani nerve used in tympanoplasty.


METHODS
One hundred and forty-one cases (154 ears) were divided into 3 groups: (1) chorda applying group (CA) 35 cases (41 ears): had perforation in pars tensa but chorda nerve still exist, the nerve were applied to spring and press a PORP or TORP prosthesis which were made by auto-osseous tissue and had a fine groove for nerve inlay. (2) residual pars tensa applying group (RTP) 67 cases (72 ears): residual pars tensa was used to spring and press prosthesis. (3) no applying group. (NA) 39 cases (41 ears). The effect measurement: ABG over 30 dB as excellent over 15 dB as effective; less than 10 dB as noneffective. Three groups were analyzed by S- t test.


RESULTS
Excellent, effective and noneffective ears (%): CA group: 29.3%, 51.2%, 19.5%; RPT group: 22.2%, 50.0%, 27.8%; NA group: 19.5%, 36.6%, 43.9%; the previous two groups contrast with NA group, P < 0.01. Pre- and post-operation ABG odds and paired contract: CA and NA, P < 0.05; RTP and NA, P < 0.05. In CA group only one ear had taste letdown temporarily and another ear had delayed and mild facial paralysis, both were auto-recovered within two weeks.


CONCLUSIONS
Chorda tympani nerve applied in tympanoplasty for spring and press prosthesis can make PORP or TORP prosthesis more steady and improve hearing.
Qiao
Yi
Y
Department of Otolaryngology, Branch of Shanghai First People's Hospital, Shanghai 200081, China. qiaoyi100@hotmail.com
Chen
Wenwen
W
Deng
Yaxin
Y
Tong
Jun
J
Zhong
Xiao
X
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D002648:Child; D002814:Chorda Tympani Nerve / Q000502:physiology* / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative; D014433:Tympanoplasty; D055815:Young Adult