Keywords Baroreflex sensitivity;hypotension, controlled;desoflurane;isoflurane;spinal cord function;spinal surgery;ankle clonus test;trachea mucosae stimulation;anesthesia depth;

• 压力敏感反射性;降压;控制性;脱氟烷;异氟烷;脊髓功能;脊柱手术;踝震挛试验;气道粘膜刺激试验;麻醉深度;