Effect of hypothermia on median nerve somatosensory evoked potentials |
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| Institution: | 1. Department of Atmospheric and Oceanic Sciences, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China;2. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China;3. Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot 76100, Israel;4. IRDR International Center of Excellence on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China;1. Division of Pediatrics, Sidra Medicine, Doha, Qatar;2. Division of Pediatric Infectious Diseases, Sidra Medicine, Doha, Qatar;3. Division of Microbiology, Sidra Medicine, Doha, Qatar;4. Weill Cornell Medical College in Qatar, Doha, Qatar |
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| Abstract: | Median nerve sornatosensory evoked potentials (SEP) were monitored in ten patients undergoing cardiac surgery with hypothermic cardiopulmonary bypass (CPB). Anesthesia was induced and maintained with sufentanil, oxygen, and pancuronium. Esophageal, nasopharyngeal, rectal, and blood temperatures were continuously monitored. SEPs were recorded before induction of anesthesia, after induction, and during cooling and rewarming on CPB. There was a strong negative correlation between SEP latencies and temperature (except rectal) (r = −.91, P < .001), for cortical latency and esophageal temperature. A decrease in esophageal temperature of 1°C resulted in an increase in SEP latency of 1 ms. There was also a weak positive correlation between evoked potential amplitude and temperature (r = .19) for cortical amplitude and esophageal temperature. |
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