PMID: 11907395Mar 22, 2002Paper

Effects of hypothermia on median nerve somatosensory evoked potentials during spontaneous circulation

Journal of Neurosurgical Anesthesiology
Manfred LangDiethelm Hansen

Abstract

Perioperative-induced hypothermia is a common means of reducing ischemic injury in neurosurgical procedures and cardiac surgery, and it may occur accidentally. Somatosensory evoked potentials (SSEPs) are used frequently for neurophysiologic monitoring of these procedures. The effects of hypothermia on SSEPs have been studied widely in humans with cardiopulmonary bypass (CPB) during nonpulsatile flow. However, changes of latency and amplitude of early SSEP components during spontaneous circulation have not yet been studied. Median nerve SSEPs were recorded in 21 patients during rewarming from 32 to 36 degrees C core temperature. Latencies and amplitudes of N9, N13, N20, and central conduction time were registered at 32, 34, and 36 degrees C. Latencies of N9, N13, and N20 were prolonged at 32 degrees C compared with 36 degrees C (N9: 13.4 +/- 1.4 msec versus 11.8 +/- 1.4 msec, P <.05; N13: 17.6 +/- 1.9 msec versus 15.4 +/- 1.4 msec, P <.01; N20: 26.5 +/- 1.8 msec versus 22.4 +/- 1.6 msec, P <.001). Amplitude of N20 was higher at 32 degrees C compared with 36 degrees C (2.86 +/- 1.94 microV versus 2.07 +/- 1.47 microV, P < .05). Central conduction time decreased by 27%, and peripheral latency of N13 decreased by 14%. The increase ...Continue Reading

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Citations

Mar 24, 2012·Journal of Neurosurgical Anesthesiology·Jai MadhokXiaofeng Jia
Jun 15, 2007·Journal of the Neurological Sciences·Michael T Froehler, Romergryko G Geocadin
May 9, 2006·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Ivana StetkárováMarkus Kofler
May 31, 2017·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·Carolina B MacielDavid M Greer
Mar 27, 2003·Current Opinion in Critical Care·Harvey L EdmondsChristopher B Shields
Jan 8, 2020·Neurocritical Care·Brittany LachanceXiaofeng Jia
Feb 5, 2014·Journal of Neurosurgical Anesthesiology·Paolo ZanattaCarlo Sorbara
Nov 18, 2018·British Journal of Anaesthesia·E AzabouUNKNOWN GENeR** (Groupe d'Explorations Neurologiques en Réanimation)

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