Yang L C, Jawan B, Chang K A, Lee J H
Department of Anesthesiology, Chang Gung Memorial Hospital, Kaohsiung Hsien, Taiwan, ROC.
Acta Anaesthesiol Scand. 1995 Oct;39(7):956-9. doi: 10.1111/j.1399-6576.1995.tb04204.x.
Somatosensory evoked potentials (SEPs) have been found to be useful for early detection of brain ischemia during hypothermic cardiopulmonary bypass in cardiac surgery. However, the relationship between temperature and latency period remains unclear. We prospectively analyzed SEPs obtained during hypothermic cardiopulmonary bypass in 20 patients who had valvular replacement. We concluded that i) a linear correlation was found between temperature and latency period during cooling and rewarming, ii) no hysteresis effect existed in cooling and rewarming, iii) there was a greater hypothermic effect on the synaptic transmission than on the conduction velocity, and iv) age had also more profound effect on relationship between temperature and latency of SEPs.
体感诱发电位（SEPs）已被发现有助于在心脏手术的低温体外循环期间早期检测脑缺血。然而，温度与潜伏期之间的关系仍不清楚。我们前瞻性地分析了20例行瓣膜置换术患者在低温体外循环期间获得的体感诱发电位。我们得出以下结论：i）在降温及复温过程中，温度与潜伏期之间呈线性相关；ii）降温及复温过程中不存在滞后效应；iii）低温对突触传递的影响大于对传导速度的影响；iv）年龄对体感诱发电位的温度与潜伏期之间的关系也有更深远的影响。
