gms | German Medical Science

57. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e. V. (DGNC)
Joint Meeting mit der Japanischen Gesellschaft für Neurochirurgie

Deutsche Gesellschaft für Neurochirurgie (DGNC) e. V.

11. bis 14.05.2006, Essen

Motor monitoring during surgery for intrinsic tumors of the insula

Motorisches Monitoring bei Operationen intrinsischer Inseltumoren

Meeting Abstract

Suche in Medline nach

  • corresponding author G. Neuloh - Klinik und Poliklinik für Neurochirurgie, Universität Bonn
  • J. Schramm - Klinik und Poliklinik für Neurochirurgie, Universität Bonn

Deutsche Gesellschaft für Neurochirurgie. Japanische Gesellschaft für Neurochirurgie. 57. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e.V. (DGNC), Joint Meeting mit der Japanischen Gesellschaft für Neurochirurgie. Essen, 11.-14.05.2006. Düsseldorf, Köln: German Medical Science; 2006. DocSA.10.07

Die elektronische Version dieses Artikels ist vollständig und ist verfügbar unter: http://www.egms.de/de/meetings/dgnc2006/06dgnc146.shtml

Veröffentlicht: 8. Mai 2006

© 2006 Neuloh et al.
Dieser Artikel ist ein Open Access-Artikel und steht unter den Creative Commons Lizenzbedingungen (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.de). Er darf vervielf&aauml;ltigt, verbreitet und &oauml;ffentlich zug&aauml;nglich gemacht werden, vorausgesetzt dass Autor und Quelle genannt werden.


Gliederung

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Objective: To assess the feasibility, validity and clinical usefulness of motor evoked potential (MEP) monitoring during surgery for intrinsic tumors of the insula. Such procedures carry a high risk for new motor deficit, due to the close relation of the tumors with the corona radiata and the internal capsule, as well as their vascular supply. MEP recording allows nearly continuous assessment of motor function in the anesthesized patient.

Methods: MEPs were successfully recorded during 60 procedures in 58 patients (29 female, 40.3 (9-73) years) with insular tumors (26 low-grade; 12 insulo-opercular, 48 insulo-paralimbic/limbic). In another 11 cases MEP recordings were unsuccessful (positioning of stimulating electrode).

Results: Stable MEPs (52%) always precluded new deficit. MEP deterioration during resection (43%) triggered intervention (stop resection, retractor, papaverine). Reversible deterioration (33%) indicated unimpaired function or transient deficit. Irreversible deterioration indicated in 6/9 cases (10% of all cases) permanent, otherwise transient new paresis. Severe permanent pareses (KPS<70, n=2) were due to postresectional ischemia. In 11 patients without successful monitoring, permant pareses occurred in 27%. An extent of resection of >90% was achieved in 55% and of <70% in 13% for monitored cases, and in 27% each for unmonitored cases.

Conclusions: MEP monitoring is feasible for insular tumors. It is a valid indicator of motor function. MEP deterioration is mostly reversible after early intervention, and indicates unimpaired function or transient new deficit. Permanent new pareses are always indicated by irreversible MEP deterioration or loss, severe new deficit is typically caused by postresectional ischemia. With MEP-Monitoring, the extent of resection appears to be higher, and the rate of new deficit appears to be lower.