不同剂量右美托咪啶对腹腔镜卵巢囊肿剥除术患者七氟醚用量的影响

目的 评价不同剂量右美托咪啶对腹腔镜卵巢囊肿剥除术患者七氟醚用量的影响.方法 择期全麻下行腹腔镜卵巢囊肿剥除术患者80例,ASA分级Ⅰ或Ⅱ级,年龄25～50岁,体重指数18～ 25 kg/m2,采用随机数字表法,将患者随机分为4组(n=20):对照组(C组)于切皮前10 min静脉输注生理盐水20 ml；低、中和高剂量右美托咪啶组(DL组、DM组和DH组)于切皮前10 min分别静脉输注右美托咪啶0.3、0.6、0.9 μg/kg,输注时间10 min.吸入七氟醚维持麻醉,术中维持Narcotrend值40～50.于给予右美托咪啶前即刻(T1)、切皮(T2)、气腹即刻(T3)、气腹后10 min(T4)和术毕(T5)时测定呼气末七氟醚浓度(ETsev),记录单位时间七氟醚用量、苏醒时间和拔除气管导管时间,拔除气管导管后10 min观察躁动发生情况,于入室静卧10 min(T0)、T3～5时采集外周静脉血样,用快速血糖分析仪测定血糖,用放射免疫法测定血清皮质醇浓度.结果 C组、DL组、DM组和DH组单位时间七氟醚用量、T2～5时ETsev、T3～5时血糖和皮质醇浓度依次降低(P＜0.05)；与C组比较,DL组、DM组和DH组拔除气管导管时间、苏醒时间缩短,躁动发生率降低(P＜0.05).结论 右美托咪啶可呈剂量依赖性地减少腹腔镜卵巢囊肿剥除术患者七氟醚用量.

Effect of different doses of dexmedetomidine on sevoflurane consumption in patients undergoing laparoscopic oophorocystectomy

Objective To investigate the effect of different doses of dexmedetomidine(Dex)on sevoflurane consumption in patients undergoing laparoscopic oophorocystectomy.Methods Eighty ASA Ⅰ or Ⅱ patients aged 25-50 yr with body mass index 18-25 kg/m2 undergoing laparoscopic oophorocystectomy were randomly divided into 4 groups (n =20): control group (group C),low dose Dex group(group DL),medium dose Dex group(group DM) and high dose Dex group(group DH).Normal saline 20 ml and Dex 0.3,0.6,0.9μg/kg was infused iv over 10 min at 10 min before skin incision in groups C,DL,DM and DH,respectively.End-tidal sevoflurane concentration (ETsev) was recorded before Dex administration(T1 ),skin incision(T2 ),immediately after pneumoperitoneum (T3 ),10 min of pneumoperitoneum(T4 ) and the end of surgery (T5 ).Duration of anesthesia,consumption of sevoflurane,emergence time,extubation time were recorded and restlessness at 10 min after extubation was also recorded.The concentrations of blood glucose and corticosteroid were measured by quickly by glucose analyzer and radio-immunity gefore anethesia induction (T0) and at T3,T4,T5 respectively.Results The consumption of sevoflurane per hour,ETsev at T2-5,concentrations of blood glucose and corticosteroid at T3-5 were decreased gradually in groups C,DL,DM and DH ( P ＜ 0.05).The emergence time and extubation time were shorter and the incidence of restlessness was lower in groups DL,DM and DH than in group C ( P ＜ 0.05 ).Conclusion Dexmedetomidine can reduce the consumption of sevoflurane in a dose-dependent manner in patients undergoing laparoscopic oophorocystectomy.