摘要
目的探讨右美托咪定在非体外循环冠状动脉旁路移植术(OPCABG)中对患者影响。方法择期行OPCABG患者60例,年龄50-65岁,ASAII或Ⅲ级,BMI%27kg/m^2,采用随机数字表法均分为右美托咪定组(D组)和对照组(C组)。D组于麻醉诱导前,静脉输注右美托咪定负荷剂量1μg/kg,10min输注完成,然后以0.5~0.7μg·kg^-1·h^-1的速率静脉输注至术毕;C组以同样的方式给予等量的生理盐水。分别于入室后(T0)、药物输注10min(T1)、气管插管后(T2)、锯胸骨时(T3)、吻合前降支时(T4)、吻合左旋支或对角支时(T5)、吻合右冠状动脉或后降支时(T6)、血管吻合完毕后15min(T7)、术毕(T8)、术后6h(Tg)、拔出气管导管后(T10)记录各项血流动力学指标。分别于T0、T3、T7、T8、T10时抽取桡动脉血1ml,测定血糖(Glu)浓度。于术前1d和术后7d采用简易精神状态量表和韦氏成人记忆及智力量表对患者进行术后认知功能测试。结果与T0时比较,C组T2~T4、T10时HR明显增快(P〈0.05);T2、T3、T10时MAP明显升高,而瓦时MAP明显降低(P〈0.05);两组T5、T6时CVP、T8~T10时CI明显升高(P〈0.05),而T6时左、右心每搏作功指数(LVSWI、RVSWI)明显降低(P〈0.05);T3、T7、T8和T10时Glu浓度明显升高(P〈0.05)。与C组比较,D组T1~T10时HR明显减慢(P〈0.05),T1~T3、R~T10时MAP,T1、T2、T4~T10时体循环阻力指数(SVRI),T1~T10时肺循环阻力指数(PVRI),T3、T7、T8时Glu浓度明显降低(P〈0.05)。C组POCD发生率为10例(33.3%),明显高于D组2例(6.7%)(P〈0.01)。结论静脉输注右美托咪定有利于稳定非体外循环冠状动脉旁路移植术患者围术期血流动力学,降低术后认知功能障碍的发生率。
Objective To investigate the effects of dexmedetomidine on postoperative cognitive function in patients undergoing off-pump coronary artery bypass grafting (OPCABG). Methods Sixty ASAⅡ or Ⅲ patients aged 50-65 yr BMI〈27 kg/m^2 undergoing OPCABG were randomized into 2 groups (n=30 each)., control group(group C) and dexmedetomidine group(group D). Dexmedetomindine 1 μg/kg was injected iv over 10 rain before anesthesia induction followed by 0.5-0. 7 μg· kg^-1· h^-1 infusion until operation finished. Group C received equal volume of normal saline. Hemo- dynamic variable were recorded at preoperative time(T0 ), after 10 min infusion(T1 ), end of induction (T2), sternotomy(T3 ), at anastomosis of left anterior descending (T4), at anastomosis of left circumflex coronary artery or diagonal artery (Ts), at anastomosis of right coronary artery or posterior descending artery (T6), at 15 rain after reestablishment of coronary blood flow (T7), end of operation (TB), 6 h after operation(T9 ) and after tracheal extubation(T10 ). Postoperative cognitive function was evaluated at 1 d before and 7 d after operation with Mini-mental state examination and Wechsler memory scale and Wechsler adult intelligence scale. Results There was significant difference between group D and group C in HR, MAP, SVRI, PVRI and GIu(P〈0.05). The incidence of POCD was significantly lower in group D than in group C(P〈0. 01). Conclusion Dexmedetomidine could obtain more stability hemodynamics and a lower incidence of POCD in patients undergoing OPCABG.
出处
《临床麻醉学杂志》
CAS
CSCD
北大核心
2014年第5期421-425,共5页
Journal of Clinical Anesthesiology
基金
辽宁省科学技术计划重点项目(2012225006)