Comparison Of The Duration Of Intrathecal Different Narcotic

【Objective】Knee arthroscope operation is minimally invasive surgery,so Patientsexpect to be able to walk as soon as possible.Although the traditionaldose of narcotic can meet surgery requirements，the duration of recovery istoo long which makes the patients feel discomfortable.The aim of this study is todetermine motor block and functional recovery of locomotion after intrathecaldifferent narcotic under the knee arthroscope operation.【Methods】Ninety patients presenting for knee arthroscope operation wereassigned to three groups by double blind randomization.Group Areceived intrathecal1.5ml of0.5%bupivacaine, plus0.6ml saline(Group A，n=30，contro1); Group B received intrathecal1.5ml of0.5%bupivacaine，plus0.6ml1%lidocaine (Group B，n=30，contro1); GroupC received intrathecal1.5ml of0.5%ropivacaine,plus0.6ml saline(GroupC， n=30， control)． Time was recorded for sensory block， peaksensory block level， the times to two—segment， LI and S2regressionfrom peak sensory block，motor blocks level at peak sensory block，Ll，and S2regressions， and the time to Bromage0. The intraoperative andpostoperative complications associated with spinal anesthesia wererecorded such as hypotension，bradycardia， nausea， vomiting， creatingheadaches，urinary retention and CNSC. 【Results】1.Time to pain block for Group B was less than those for Group A orGroup C.2.Times to peak sensory block were similar in Group A and Group B;The peaksensory block in Group C is inferior to Group A and Group B;It takes moretime for Group C to reach the peak sensory block.3.Times to two-segment, L1, and S2regressions from peak sensory block, and timeto Bromage0were Significantly extended in Group B compared to Group A andGroup C; Group C has the lowest grade in all the time points, as well asthe shortest time reaching Bromage0.4.The shivering during operation in Group B was significantly higher than Group C.【Conclusion】We conclude that lidocaine (6mg) mixed to spinal bupivacaine (7.5mg) can notshorten the duration of bupivacaine spinal anesthesia, therefore can not provide morerapid recovery from the spinal anesthesia compared to the same dose of bupivacaine(7.5mg) alone. A small dose of ropivacaine makes the lower motor blockand the patients enjoy a faster recovery.