摘要目的 观察阿片类药物用于刮宫产硬膜外术后自控镇痛(Patient-controlled epidural analgesia,PCEA)对血清髓鞘碱性蛋白(myelin basic protein,MBP)和下肢体感诱发电位(somatosensory evoked potential,SEP)的影响.方法 术后行PCEA的剖官产产妇120例,随机数字表法分为4组,每组30例:B组:0.008％布托啡诺；BR组:0.008％布托啡诺+0.2％罗哌卡因；MR组:0.004％吗啡+0.2％罗哌卡因；R组:0.2％罗哌卡因,观察记录孕妇术后2h(T1)、4h(T2)、8h(T3)、12h(T4)、24h(T5)和48h(T6)的VAS评分、OAA/S评分、不良反应发生情况、血清MBP浓度、下肢SEP和神经功能.结果 T3、T4、T5时点的VAS评分,BR组[(1.64±0.38)分,(1.86±0.62)分,(1.93±0.67)分]和MR组[(1.74±0.39)分,(1.91±0.58)分,(1.98±0.63)分]均低于B组[(4.6±0.5)分,(4.6±0.3)分,(4.7±0.3)分]和R组[(2.64±0.41)分,(2.83±0.91)分,(3.37±0.87)分(P＜0.05)]；各组各时点的OAA/S评分无差异(P＞0.05)；MR组的恶心(6例)、呕吐(2例)和腹胀(5例)的发生率高于其余3组(P＜0.05)；4组产妇术后48h的血清MBP浓度、SEP及神经功能与术前相比均差异无显著性(P＞0.05).结论 小剂量低浓度的阿片类药物用于PCEA对血清MBP和SEP无影响.

abstractsObjective To investigate the effect of patient-controlled epidural analgesia(PCEA) with opioids on serous myelin basic protein(MBP) and somatosensory evoked potential(SEP) of lower limbs in puerperants.Methods A total of 120 puerperants,after receiving cesarean section,were divided into four groups by random number table method as group B,BR,MR and R randomly,and each group included 30 cases.After surgery,each case received PCEA:group B received 0.008％ butrophanol;group BR received 0.008％ butrophanol + 0.2％ ropivacaine;group MR received 0.004％ morphine +0.2％ ropivacaine and group R received 0.2％ ropivacaine only.VAS score,OAA/S score,adverse effect occurrence,concentration changes of serous MBP,SEP of both lower limbs and neurological function were observed at 2h(T1 ),4h(T2),8 h(T3),12h(T4),24 h(T5) and 48h (T6) after surgery.Results VASscoresofgroupBR(1.64±0.38,1.86±0.62,1.93±0.67) and MR( 1.74 ±0.39,1.91±0.58,1.98 ±0.63) at T3,T4,T5 were lower than those of group B(4.6 ±0.5,4.6 ±0.3,4.7 ±0.3)and R(2.64 ±0.41,2.83 ±0.91,3.37 ±0.87) (P＜0.05).There was no significance in four groups in OAA/S score at each point (P ＞ 0.05 ).Incidence of nausea ( 6 cases),vomiting ( 2 cases) and abdominal distention ( 5cases) of group M was higher than that of other three groups(P＜0.05).There was no significant difference in concentrations of serous MBP,SEP and neurological function in all four groups between preoperative time and 48h after operation(P＞0.05).Conclusion Lower-dose and lower- concentration opioids used for PCEA have no influence on serum MBP and SEP.