gms | German Medical Science

55. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e. V. (DGNC)
1. Joint Meeting mit der Ungarischen Gesellschaft für Neurochirurgie

Deutsche Gesellschaft für Neurochirurgie (DGNC) e. V.

25. bis 28.04.2004, Köln

Prognostic value of motor-evoked potentials in patients operated on space-occupying processes in the spinal canal

Interpretation von Potentialveränderungen beim intraoperativen Neuromonitoring von Hirnstammläsionen

Meeting Abstract

  • corresponding author György Istvan Csécsei - Department of Neurosurgery, University of Debrecen, Debrecen /H
  • P. Ruszthi - Department of Neurosurgery, University of Debrecen, Debrecen /H
  • L. Mikó - Department of Neurosurgery, University of Debrecen, Debrecen /H
  • G. Székely - Department of Neurosurgery, University of Debrecen, Debrecen /H

Deutsche Gesellschaft für Neurochirurgie. Ungarische Gesellschaft für Neurochirurgie. 55. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e.V. (DGNC), 1. Joint Meeting mit der Ungarischen Gesellschaft für Neurochirurgie. Köln, 25.-28.04.2004. Düsseldorf, Köln: German Medical Science; 2004. DocJM II.05

Die elektronische Version dieses Artikels ist vollständig und ist verfügbar unter: http://www.egms.de/de/meetings/dgnc2004/04dgnc0005.shtml

Veröffentlicht: 23. April 2004

© 2004 Csécsei 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

The clinical symptoms of cord compression do not always show an appropriate improvement after decompressive operation of the spinal canal. The authors searched for an objective electrophysiological indicator which could be used for predicting post-operative clinical improvement of these patients.

Methods

Latency and amplitude values of motor responses to transcranial magnetic stimulation (MEP) detected from the m. tibialis anterior have been determined. Values exceeding the average with more than +2.5 SD were established as pathological ones. The exceeding of the pathological values over the normal range was determined in percent.

Results

3 groups of patients with extramedullary space occupying processes in the spinal canal were separately examined:

1. no clinical sings and normal MEP values both prae- and postoperatively (No: 7);

2. praeoperative paresis with pathological MEP latencies which exceeded the upper limit of normal values by less than 30 %. Paresis recovered and MEP latencies returned to the normal range postoperatively (No: 9);

3. Pathological MEP latencies exceeded the upper limit of normal values by more than 30 %. Praeop paresis improved but not recovered completely, pathological MEP latencies shortened (No: 8).

Conclusions

According to our results, latency of preoperative MEP carry predictive value as far as postoperative recovery is concerned. No complete recovery of muscular strength is expected when MEP latencies exceed the upper limit of the normal range by more than 30 %.