摘要:

Objective:This study aimed to better predict the early postoperative facial nerve (FN) function after acoustic neuroma (AN) resection.Study Design:This study was a prospective series.Setting:The surgery was conducted in a tertiary referral center.Patients:A total of 44 patients undergoing AN resection with cranial nerve monitoring were observed for at least 1 year after surgery.Main Outcome Measures:The predictive value of amplitude of the FN stimulus response on the early postoperative FN function was measured.Results:Cranial nerve monitoring in AN surgery was used to obtain the stimulation threshold and facial electromyograph response amplitudes to FN stimulation proximal and distal to the tumor at 0.2 V above threshold. Thirty-eight of forty-four patients studied had a low postresection threshold (< 0.1 V). Of these (10), 26% sustained a postoperative FN dysfunction of ouse-Brackmann (HB) grades 3-6. In an effort to improve the predictive value from cranial nerve monitoring, the response amplitude to suprathreshold stimulation was compared with the threshold and FN function. Eighty-nine percent of patients with an amplitude of >200 U.V had a grade 1-2 early postoperative FN function, whereas only 41% of patients with<200 uY had a grade 1-2 early postoperative FN function (p=0.00035). Eighty-eight percent of patients with both a low threshold and high amplitude had a grade 1-2 early postoperative FN function, whereas the remaining 12% of patients had a grade 3-6 FN function (p=0.0032). The false-positive rate of threshold alone in predicting a grade 1-2 FN function was 26% compared to 12% for low threshold and high amplitude combined.Conclusions:The use of FN threshold and amplitude together is superior to threshold alone as a predictor of early postoperative FN function.

ISSN:0192-9763    

出版商:OVID    

年代:1998

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1998

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1998

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1998

数据来源: OVID

ISSN:0192-9763    

出版商:OVID    

年代:1998

数据来源: OVID