Anesthesia and analgesia
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Anesthesia and analgesia · May 1986
Influence of moderate hypothermia on posterior tibial nerve somatosensory evoked potentials.
Posterior tibial nerve somatosensory evoked potentials (PTN-SSEP) were recorded in eight patients during cardiac surgery with cardiopulmonary bypass and moderate hypothermia (25-28 degrees C). There was no correlation between changes in amplitude and temperature; however, latencies of potentials recorded over the tibial nerve in the popliteal fossa, the lumbar spinal cord, and the cortex increased linearly as temperature decreased. ⋯ In this study P1 prolonged 1.15 msec/degree C (r = 0.89, P less than 0.001). This implies that a temperature decrease of 2-3 degrees C may prolong P1 latency by more than 3 msec.