gms | German Medical Science

68. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie
90. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie
45. Tagung des Berufsverbandes der Fachärzte für Orthopädie in Zusammenarbeit mit dem Deutschen Verband für Physiotherapie – Zentralverband der Physiotherapeuten/Krankengymnasten

19. bis 23.10.2004, Berlin

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Results of monitoring the motor evoked potentials (MEPs) induced overcranially with the magnetic field and recorded over peroneal nerve branches during the scoliosis surgery

Meeting Abstract (DGOOC 2004)

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  • presenting/speaker J. Huber - Karol Marcinkowski University School of Medical Science, Department of Pathophysiology of Locomotor Organs, Poznan / Poland
  • M. Glowacki - Karol Marcinkowski University School of Medical Science, Department of Pediatric Orthopaedic, Poznan / Poland
  • M. Kaczmarek - Karol Marcinkowski University School of Medical Science, Department of Pathophysiology of Locomotor Organs, Poznan / Poland

Deutsche Gesellschaft für Unfallchirurgie. Deutsche Gesellschaft für Orthopädie und orthopädische Chirurgie. Berufsverband der Fachärzte für Orthopädie. 68. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 90. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie und 45. Tagung des Berufsverbandes der Fachärzte für Orthopädie. Berlin, 19.-23.10.2004. Düsseldorf, Köln: German Medical Science; 2004. Doc04dguE8-1525

The electronic version of this article is the complete one and can be found online at: http://www.egms.de/en/meetings/dgu2004/04dgu0256.shtml

Published: October 19, 2004

© 2004 Huber et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.en). You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.

Outline

Text

Introduction

Somatosensory evoked potentials recorded intraoperatively during surgery of scoliosis are very useful for assesment of the afferent spinal transmission. However their amplitudes are low and in some cases may cause doubts regarding the success of surgery. Therefore (MEPs) were tested in this study because of their larger amplitudes and more stable form, verifying transmission within cortico-spinal tracts and peripheral efferent transmission.

Methods

In 8 girls MEPs were recorded intraoperatively over peroneal nerve branches at the popliteal fossa during the scoliosis correction (C-D method). Potentials were induced with the magnetic field stimulator overcranially at the area of vertex. Normal amplitudes of MEPs were not less than 800 uV, their latencies with a mean of 29.1 ms and corresponding efferent conduction velocity was with 47.3 m/s.

Results

Fluctuations of amplitudes and latencies (from 500 to 1500 uV and from 32.3 to 37.8 ms, respectively) following distraction, derotation and compression procedures of spine were observed. Recovery of analyzed MEPs parameters comparing to those observed before surgery was initiated we found in all treated patients .

Conclusions

The effect of the surgical procedures performed during correction of scoliosis on the efferent transmission is transient as in cases of the somatosensory potential tests. MEPs recorded over the lower extremities nerve branches are always distinct enough to satisfactory confirm the proper efferent transmission no matter to the anaesthetics influence.