076. Facial nerve monitoring in vestibular schwannoma surgery: Is the mechanical stimulation as reliable as the electric one ?

G. C. Modugno, G. G. Ferri, G. Magnani, A. Fioravanti, F. Calbucci, A. Rinaldi Ceroni

Research output: Contribution to journalArticle

Abstract

Microsurgical techniques and intraoperative cranial nerve monitoring have considerably improved the results of vestibular schwannoma (VS) surgery. More in detail, the preservation of facial nerve (FN) function is generally accomplished in the great majority of the cases, at least for small and mediumsized tumours. Intraoperative FN monitoring is usually performed with electromyographic (EMG) devices, placing subdermal needle electrodes in the facial muscles and recording spontaneous or elicited EMG responses. After the tumour has been removed, the FN is electrically stimulated at its exit from the brain stem. Many studies have been performed, comparing the results of these electrophysiologic techniques, in terms of stimulation thresholds and response amplitudes, in order to predict early and long-term postoperative facial nerve function after VS resection. The common experience of surgeons is also that a mechanical stimulation of the nerve can evoke the typical "burst" responses, suggestive of FN integrity. In our experience when EMG activity is elicited during surgical procedures and after tumor removal stimulating mechanically the FN with a dissector, it is generally evocative of a good functional outcome. In order to confirm this observation, we performed a retrospective study of 250 patients affected by VS, consecutively operated on between 1989 and 2001 at our interdisciplinary centre. Preoperative charts, intraoperative data, and postoperative results were reviewed and statistically analysed in relation to the presence of EMG activity evoked by mechanical stimulation of the FN.

Original languageEnglish
Pages (from-to)29
Number of pages1
JournalSkull Base
Volume11
Issue numberSUPPL. 2
Publication statusPublished - 2001

Fingerprint

Acoustic Neuroma
Facial Nerve
Facial Muscles
Neoplasms
Cranial Nerves
Brain Stem
Needles
Electrodes
Retrospective Studies
Equipment and Supplies

ASJC Scopus subject areas

  • Clinical Neurology

Cite this

Modugno, G. C., Ferri, G. G., Magnani, G., Fioravanti, A., Calbucci, F., & Rinaldi Ceroni, A. (2001). 076. Facial nerve monitoring in vestibular schwannoma surgery: Is the mechanical stimulation as reliable as the electric one ? Skull Base, 11(SUPPL. 2), 29.

076. Facial nerve monitoring in vestibular schwannoma surgery : Is the mechanical stimulation as reliable as the electric one ? / Modugno, G. C.; Ferri, G. G.; Magnani, G.; Fioravanti, A.; Calbucci, F.; Rinaldi Ceroni, A.

In: Skull Base, Vol. 11, No. SUPPL. 2, 2001, p. 29.

Research output: Contribution to journalArticle

Modugno, GC, Ferri, GG, Magnani, G, Fioravanti, A, Calbucci, F & Rinaldi Ceroni, A 2001, '076. Facial nerve monitoring in vestibular schwannoma surgery: Is the mechanical stimulation as reliable as the electric one ?', Skull Base, vol. 11, no. SUPPL. 2, pp. 29.
Modugno GC, Ferri GG, Magnani G, Fioravanti A, Calbucci F, Rinaldi Ceroni A. 076. Facial nerve monitoring in vestibular schwannoma surgery: Is the mechanical stimulation as reliable as the electric one ? Skull Base. 2001;11(SUPPL. 2):29.
Modugno, G. C. ; Ferri, G. G. ; Magnani, G. ; Fioravanti, A. ; Calbucci, F. ; Rinaldi Ceroni, A. / 076. Facial nerve monitoring in vestibular schwannoma surgery : Is the mechanical stimulation as reliable as the electric one ?. In: Skull Base. 2001 ; Vol. 11, No. SUPPL. 2. pp. 29.
@article{8d7c6dd2f11042c5962fa52e327ddc6c,
title = "076. Facial nerve monitoring in vestibular schwannoma surgery: Is the mechanical stimulation as reliable as the electric one ?",
abstract = "Microsurgical techniques and intraoperative cranial nerve monitoring have considerably improved the results of vestibular schwannoma (VS) surgery. More in detail, the preservation of facial nerve (FN) function is generally accomplished in the great majority of the cases, at least for small and mediumsized tumours. Intraoperative FN monitoring is usually performed with electromyographic (EMG) devices, placing subdermal needle electrodes in the facial muscles and recording spontaneous or elicited EMG responses. After the tumour has been removed, the FN is electrically stimulated at its exit from the brain stem. Many studies have been performed, comparing the results of these electrophysiologic techniques, in terms of stimulation thresholds and response amplitudes, in order to predict early and long-term postoperative facial nerve function after VS resection. The common experience of surgeons is also that a mechanical stimulation of the nerve can evoke the typical {"}burst{"} responses, suggestive of FN integrity. In our experience when EMG activity is elicited during surgical procedures and after tumor removal stimulating mechanically the FN with a dissector, it is generally evocative of a good functional outcome. In order to confirm this observation, we performed a retrospective study of 250 patients affected by VS, consecutively operated on between 1989 and 2001 at our interdisciplinary centre. Preoperative charts, intraoperative data, and postoperative results were reviewed and statistically analysed in relation to the presence of EMG activity evoked by mechanical stimulation of the FN.",
author = "Modugno, {G. C.} and Ferri, {G. G.} and G. Magnani and A. Fioravanti and F. Calbucci and {Rinaldi Ceroni}, A.",
year = "2001",
language = "English",
volume = "11",
pages = "29",
journal = "Skull Base",
issn = "1531-5010",
publisher = "Thieme Medical Publishers",
number = "SUPPL. 2",

}

TY - JOUR

T1 - 076. Facial nerve monitoring in vestibular schwannoma surgery

T2 - Is the mechanical stimulation as reliable as the electric one ?

AU - Modugno, G. C.

AU - Ferri, G. G.

AU - Magnani, G.

AU - Fioravanti, A.

AU - Calbucci, F.

AU - Rinaldi Ceroni, A.

PY - 2001

Y1 - 2001

N2 - Microsurgical techniques and intraoperative cranial nerve monitoring have considerably improved the results of vestibular schwannoma (VS) surgery. More in detail, the preservation of facial nerve (FN) function is generally accomplished in the great majority of the cases, at least for small and mediumsized tumours. Intraoperative FN monitoring is usually performed with electromyographic (EMG) devices, placing subdermal needle electrodes in the facial muscles and recording spontaneous or elicited EMG responses. After the tumour has been removed, the FN is electrically stimulated at its exit from the brain stem. Many studies have been performed, comparing the results of these electrophysiologic techniques, in terms of stimulation thresholds and response amplitudes, in order to predict early and long-term postoperative facial nerve function after VS resection. The common experience of surgeons is also that a mechanical stimulation of the nerve can evoke the typical "burst" responses, suggestive of FN integrity. In our experience when EMG activity is elicited during surgical procedures and after tumor removal stimulating mechanically the FN with a dissector, it is generally evocative of a good functional outcome. In order to confirm this observation, we performed a retrospective study of 250 patients affected by VS, consecutively operated on between 1989 and 2001 at our interdisciplinary centre. Preoperative charts, intraoperative data, and postoperative results were reviewed and statistically analysed in relation to the presence of EMG activity evoked by mechanical stimulation of the FN.

AB - Microsurgical techniques and intraoperative cranial nerve monitoring have considerably improved the results of vestibular schwannoma (VS) surgery. More in detail, the preservation of facial nerve (FN) function is generally accomplished in the great majority of the cases, at least for small and mediumsized tumours. Intraoperative FN monitoring is usually performed with electromyographic (EMG) devices, placing subdermal needle electrodes in the facial muscles and recording spontaneous or elicited EMG responses. After the tumour has been removed, the FN is electrically stimulated at its exit from the brain stem. Many studies have been performed, comparing the results of these electrophysiologic techniques, in terms of stimulation thresholds and response amplitudes, in order to predict early and long-term postoperative facial nerve function after VS resection. The common experience of surgeons is also that a mechanical stimulation of the nerve can evoke the typical "burst" responses, suggestive of FN integrity. In our experience when EMG activity is elicited during surgical procedures and after tumor removal stimulating mechanically the FN with a dissector, it is generally evocative of a good functional outcome. In order to confirm this observation, we performed a retrospective study of 250 patients affected by VS, consecutively operated on between 1989 and 2001 at our interdisciplinary centre. Preoperative charts, intraoperative data, and postoperative results were reviewed and statistically analysed in relation to the presence of EMG activity evoked by mechanical stimulation of the FN.

UR - http://www.scopus.com/inward/record.url?scp=33747803598&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33747803598&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:33747803598

VL - 11

SP - 29

JO - Skull Base

JF - Skull Base

SN - 1531-5010

IS - SUPPL. 2

ER -