乌司他丁对心脏瓣膜置换术患者体外循环期间全身炎性反应的影响

目的 探讨乌司他丁对心脏瓣膜置换术患者体外循环期间全身炎性反应的影响.方法 拟行心脏瓣膜置换术的风湿性心脏病患者40例,性别不限,体重39～72kg,年龄27～44岁,ASAⅡ或Ⅲ级,随机分为2组(n=20):对照组(C组)和乌司他丁组(U组).U组于CPB前10 min静脉注射乌司他丁1万U/kg,CPB预充液中加入1万U/kg,C组以等容量生理盐水替代乌司他丁.于CPB前15 min(T1)、CPB 10 min(T2)、CPB结束后30 min(T3)、60 min(T4)时测定血浆白细胞介素6(IL-6)、IL-8、IL-10及肿瘤坏死因子α(TNF-α)的浓度.结果 与C组比较,U组CPB期间和CPB结束后血浆IL-6、IL8和TNF-α的浓度降低,IL-10浓度升高(P<0.05或0.01);与T1比较,T2,3时两组血浆IL-6、IL-8、IL-10、TNF-α的浓度升高(P<0.01).结论 乌司他丁可减低心脏瓣膜置换术患者CPB期间促炎-抗炎反应失衡,减轻全身炎性反应.     

乌司他丁后处理及其联合预先给药对CPB下心脏瓣膜置换术患者心肌炎性反应的影响

目的 评价乌司他丁后处理及其联合预先给药对CPB下心脏瓣膜置换术患者心肌炎性反应的影响.方法 择期行CPB下心脏瓣膜置换术患者80例,性别不限,年龄21～59岁,心功能分级Ⅱ或Ⅲ级.采用随机数字表法,将患者随机分为4组(n=20):生理盐水对照组(C组)、乌司他丁预先给药组(U1组)、乌司他丁后处理组(U2组)和乌司他丁预先给药联合后处理组(U3组).U1组于气管插管后至升主动脉阻断前10 min经中心静脉输注乌司他丁500～ 1000 U·kg-1·min-(剂量20 000U/kg);U2组于主动脉开放前5～7 min经主动脉根部灌注乌司他丁4000～5000 U·kg-1·min-1(剂量10 000 U/kg);U3组进行乌司他丁预先给药联合后处理;C组给予等容量生理盐水.分别于升主动脉阻断前10 min(T1)、升主动脉阻断后40 min(T2)、主动脉开放后45 min(T3)和术毕(T4)时采集动脉血样,测定血浆IL- 10、IL-1、IL-6和TNF-α的浓度,并进行中性粒细胞(PMN)计数.于主动脉开放后45min时取右心耳组织,采用免疫组化法测定IL-6和IL-1β的表达.结果 与C组比较,U1组、U2组和U3组血浆IL-10浓度升高,血浆IL-1、IL-6、TNF-α的浓度和PMN计数降低,心肌组织IL-1β和IL-6表达下调(P＜ 0.05);与U1组和U2组比较,U3组T2-4时血浆IL-10浓度升高,血浆IL-1、IL-6、TNF-α的浓度和PMN计数降低,心肌组织IL-1β和IL-6表达下调(P＜0.05).结论 乌司他丁后处理可抑制CPB下心脏瓣膜置换术患者心肌炎性反应,联合预先给药时其效应增强.     

乌司他丁对心脏瓣膜置换术病人脑损伤的影响

目的探讨乌司他丁对心脏瓣膜置换术病人脑损伤的影响及其机制。方法24例心脏瓣膜置换术病人,随机分为乌司他丁组(U组)和对照组(C组),每组12例。U组于麻醉诱导后即刻静脉注射乌司他丁1.2万U/kg,另0.6万U/kg加于体外循环(CPB)预充液中,0.6万U/kg于主动脉开放前约5 min加入CPB机内。C组用等容积生理盐水代替。于麻醉后手术前(T1)、复温至36℃(T2)、停CPB 30 min(T3)、CPB后6 h(T4)抽取颈静脉球血,用放免法测定神经元特异性烯醇化酶(NSE) 浓度、用ELISA法测定S100β蛋白(S100β)浓度,用硫代巴比妥法测丙二醛(MDA)浓度,用黄嘌呤氧化酶法测定超氧化物歧化酶(SOD)活性;于T1、T3、T4用放免法测定肿瘤坏死因子-α(TNF-α)、白细胞介素6(IL-6)、白细胞介累8(IL-8)浓度,用ELISA法测定IL-10浓度。结果两组S100β、NSE、MDA浓度在T2-4时高于T1,TNF-α、IL-6、IL-8、IL-10浓度在T3,4时高于T1(P<0.01);U组S100β、NSE、TNF-α、IL-6、IL- 8浓度在T3、4时低于C组(P<0.05或0.01);T2-4时,U组SOD活性高于C组,MDA浓度低于C组(P< 0.05或0.01);U组IL-10浓度在T4时高于C组(P<0.05或0.01)。结论乌司他丁可减轻心脏瓣膜置换术病人的脑损伤,其机制可能与其减少促炎细胞因子释放、增加抗炎细胞因子生成及抗氧化作用有关。     

乌司他丁对体外循环心脏手术患者肺炎性反应的影响

目的 研究乌司他丁（ulinastatin,uti)对心肺转流（CPB）心脏手术患者肺炎性反应的影响。方法 择期心脏瓣膜置换患者60例，随机分成对照组（I组，n=20),uti 1万U／kg组（Ⅱ组,n=20),uti 2万U／kg组（Ⅲ组,n=20)。在CPB前主动脉开放心脏复跳1、3、5、10min分别采右心房与肺静脉血检测PMN、CD11b、IL－8、IL－10、MDA和SOD水平。结果 主动脉开放心脏复跳后对照组右心房和肺静脉血中上述指标的水平较CPB前显著性升高（P＜0．05），与对照组比较，乌司他丁两组肺静脉血上述指标的水平明显下降（P＜0．05）。结论 （1）体外循环过程中肺发生了炎性反应；（2）乌司他丁能减轻CPB肺部的炎性反应，其2万U／kg组抑制炎性反应的效果优于1万U／kg组。     

乌司他丁预处理对CPB下心脏瓣膜置换术患者鱼精蛋白诱发肺损伤的影响

目的 评价乌司他丁预处理对CPB下心脏瓣膜置换术患者鱼精蛋白诱发肺损伤的影响.方法 择期CPB下行心脏瓣膜置换术患者60例,性别不限,年龄21～59岁,心功能分级Ⅱ或Ⅲ级,ASA分级Ⅱ或Ⅲ级.采用随机数字表法,将患者分为3组(n=20):鱼精蛋白中心静脉给药对照组(C1组)、鱼精蛋白升主动脉给药对照组(C2组)和乌司他丁预处理组(U组).U组于气管插管后至上腔静脉和下腔静脉阻断前10 min经中心静脉输注乌司他丁20 000 U/kg.3组脱离CPB后10 min时均经8 min给予鱼精蛋白4 mg/kg;C1组及U组经右颈内静脉给药,C2组经主动脉根部给药.分别于给予鱼精蛋白前5 min和给予鱼精蛋白后15 min时采集左心房和右心房血样,进行血小板计数(Plt)和中性粒细胞计数(PMN),测定血浆血栓烷B2(TXB2)、6-酮-前列腺素F1α(6-keto-PGF1α)的浓度;采集左心房血样,测定TNF-α、IL-1、IL-8、CD1 1b/CD18、C3a、C5a、SOD和MDA的水平,进行血气分析,测定肺泡-动脉氧分压差(A-aDO2),计算呼吸指数(RI)和氧合指数(OI),并记录肺动脉压(PAP).结果 与右心房血比较,C1组给予鱼精蛋白后15 min时左心房血Plt和PMN降低,血浆TXB2浓度升高,C2组和U组血浆6-keto-PGF1α、SOD水平升高(P＜0.05);与C1组比较,C2组和U组给予鱼精蛋白后15 min时Ph、PMN、血浆6-keto-PGF1α浓度升高,血浆TXB2、TXB2/6-keto-PGF1α、TNF-α、IL-1、IL-8、C3a、C5a、MDA水平、PAP、A-aDO2和RI降低,CD1 1b/CD18表达下调,OI升高(P＜0.05);U组和C2组间上述指标差异无统计学意义(P＞0.05).结论 乌司他丁预处理可抑制CPB下心脏瓣膜置换术患者鱼精蛋白诱发肺损伤,其作用与经主动脉途径给予鱼精蛋白相似.     

盐酸戊乙奎醚复合乌司他丁对体外循环心脏瓣膜置换术患者肺损伤的影响

目的 评价盐酸戊乙奎醚复合乌司他丁对体外循环(CPB)心脏瓣膜置换术患者肺损伤的影响.方法 择期行CPB心脏瓣膜置换术患者60例,年龄33～64岁,体重47～81 kg,性别不限,ASA分级Ⅱ或Ⅲ级,心功能分级Ⅱ或Ⅲ级,随机分为4组(n=15):对照组(C组)、乌司他丁组(U组)、盐酸戊乙奎醚组(P组)和盐酸戊乙奎醚复合乌司他丁组(PU组).CPB结束后30 min时,C组将PEEP增至8 cm H2O;U组、P组和PU组分别静脉注射乌司他丁2万U/kg、盐酸戊乙奎醚0.05 mg/kg、盐酸戊乙奎醚0.05 mg/kg和乌司他丁2万U/kg,然后将PEEP增至8 cm H2O.于CPB结束后30 min、3、6 h、术后12和24 h时,测定PaO2,计算氧合指数;于上述时点记录气道峰压和气道平台压,计算肺顺应性;于上述各时点采用ELISA法测定血清TNF-αIL-6、IL-8及IL-10的浓度;于CPB结束后6 h和术后12、24 h时行肺损伤评分.结果 与C组比较,U组、P组和PU组氧合指数和肺顺应性升高,肺损伤评分降低(P＜0.05或0.01);与U组和P组比较,PU组氧合指数和顺应性升高,肺损伤评分降低(P＜0.05).与C组比较,U组、P组和PU组血清TNF-α、IL-6和IL-8的浓度降低,IL-10浓度升高(P＜0.05或0.01);与U组和P组比较,PU组血清TNF-α、IL-6和IL-8的浓度降低,IL-10浓度升高(P＜0.05).U组和P组间上述标比较差异无统计学意义(P＞0.05).结论 盐酸戊乙奎醚复合乌司他丁可减轻CPB心脏瓣膜置换术患者肺损伤,其机制可能与抑制炎性反应有关.     

乌司他丁后处理及其联合预处理对体外循环下心脏瓣膜置换术患者心肌细胞凋亡的影响

目的 评价乌司他丁后处理及其联合预处理对CPB下心脏瓣膜置换术患者心肌细胞凋亡的影响.方法 择期CPB下心脏瓣膜置换术患者80例,性别不限,年龄21～59岁,心功能分级Ⅱ或Ⅲ级.采用随机数字表法,将患者随机分为4组(n=20):生理盐水对照组(C组)、乌司他丁预处理组(U1组)、乌司他丁后处理组(U2组)和乌司他丁预处理联合后处理组(U3组).U1组进行乌司他丁预处理:于气管插管后～升主动脉阻断前10 min经中心静脉输注乌司他丁500～ 1000 U·kg-1·min-1(剂量20000U/kg),U2组进行乌司他丁后处理:于主动脉开放前5～7 min经主动脉根部灌注乌司他丁4000～5000 U·kg-1·min-1(剂量l0000U/kg),U3组进行乌司他丁预处理联合后处理,C组给予等容量生理盐水.分别于升主动脉阻断前10 min、升主动脉阻断后40 min、升主动脉开放后45 min和术毕时采集动脉血样,分离血浆,测定血浆肿瘤坏死因子-α (TNF-α)和可溶性肿瘤坏死因子受体l( sTNF-R1)浓度.于升主动脉开放后45 min时取右心耳心肌组织,测定TNF-α、Bcl-2、Bax、caspase-3表达和细胞凋亡情况,并计算Bcl-2与Bax的比值(Bcl-2/Bax比率)和凋亡指数(AI).结果 与C组比较,U1组、U2组和U3组血浆TNF-α和sTNF-R1的浓度及AI降低,心肌组织TNF-α、Bax、caspase-3表达下调,Bcl-2表达上调,Bcl-2/Bax比率升高(P＜0.05);与U1组和U2组比较,U3组血浆TNF-α和sTNF-R1的浓度和AI降低,心肌组织TNF-α、Bax和caspase-3表达下调,Bcl-2表达上调,Bcl-2/Bax比率升高(P＜0.05).结论 乌司他丁后处理可抑制CPB下心脏瓣膜置换术患者心肌细胞凋亡,联合预处理时其效应增强,其机制与平衡心肌细胞Bcl-2与Bax表达及下调TNF-α及其受体表达有关.     

乌司他丁和抑肽酶对体外循环小儿炎性反应及心肌损伤的影响

目的研究乌司他丁和抑肽酶对体外循环（CPB）小儿炎性反应及心肌损伤的影响。方法选择拟行CPB的先天性心脏病患儿90例,随机分成6组,每组15例：对照组（C组,不使用乌司他丁及抑肽酶）、小剂量乌司他丁组（UL组,乌司他丁1万U/kg）、大剂量乌司他丁组（UH组,乌司他丁2万U/kg）、小剂量抑肽酶组（AL组,抑肽酶7．5万KIU/kg）、大剂量抑肽酶组（AH组,抑肽酶15万KIU/ kg）、小剂量乌司他丁复合小剂量抑肽酶组（UL＋AL组,乌司他丁1万U/kg＋抑肽酶7．5万KIU/kg）。乌司他丁或/和抑肽酶按各组要求剂量在转机前一次性加入预充液中。于CPB前（T1）、升主动脉开放5 min（T2）、CPB结束后30 min（T3）、4 h（T4）抽取动脉血,测定血浆IL-6、IL-8、IL-10、TNF-α、cTnI浓度及CK-MB活性,记录术后辅助通气时间、24 h引流量、心脏复跳情况及围术期多巴胺使用情况。结果与C组比较,在T2～T4时,UH组、AH组、UL＋AL,组血浆IL-6、IL-8、TNF-α、cTnI浓度及CK-MB活性降低;AH组、UL＋AL组IL-10增高（P＜0．05）;UL＋AL组心脏自动复跳率（100％）增高,血管活性药物使用率较低,术后辅助通气时间较短（P＜0．05）;AH组术后出血量较少（P＜0．05）。结论大剂量乌司他丁、大剂量抑肽酶及小剂量乌司他丁复合小剂量抑肽酶,均可通过抑制CPB炎性反应、减轻小儿心肌损伤,小剂量乌司他丁复合小剂量抑肽酶效果更佳。     

乌司他丁对体外循环心脏手术后病人肾功能的影响

目的 观察乌司他丁对体外循环(CPB)心脏手术后病人肾功能的影响。方法 24例择期心脏瓣膜替换术病人随机分成对照组(C组，n=12)和药物组(U组，n=12)；药物组术中予乌司他丁(UTI)30万U注入预充液中随机转入体内，术后1～3d均予UTI 30万U静滴。对照组予等量生理盐水。分别于术前(T0)、术后ld(T1)、3d(T3)、5d(T5)、7d(T7)检测尿中视黄醇结合蛋白(RBP)、尿中N-乙酰-β-D-氨基葡萄糖苷酶(NAG)、尿中β2-微球蛋白(β2-MG)、血清β2-MG、血清肌酐(Cr)、血清尿素氮(BUN)。结果①尿RBP：C组术后各时点值以及U组T1、T3值明显高于T0值(P＜0．01、P＜0．05)，两组术后各时点值比较，U组明显低于C组(P＜0．01)；②尿NAG：C组术后各时点值显著高于T0(P＜0．01)，U组术后各时点值逐渐升高，T5、T7与T0比较差异有显著性(P＜0．05、P＜0．01)，两组间术后各时点值比较差异有显著性(P＜0．01)；③尿β2-MG：C组术后各时点值显著高于T0值(P＜0．01)，U组T1、T3明显高于T0值(P＜0．05)，两组间术后各同一时点值比较差异有显著性(P＜0．01)；④血β2-MG：C组术后仅T3明显高于T0值及U组同一时点值(P＜0．05)；⑤BUN、Cr：C组术后仅T2、T3显著高于T0及U组同一时点值(P＜0．05)。结论 UTI对CPB心脏手术后病人肾脏功能具有保护作用。     

N-乙酰半胱氨酸对体外循环下心脏瓣膜置换术患者心肌缺血再灌注损伤的影响

Objective To investigate the effects of N-acetylcysteine(NAC)on myocardial ischemia-reperfusion(I/R)injury in patients undergoing cardiac valve replacement under cardiopulmonary bypass(CPB).Methods Twenty-two ASA Ⅱ or Ⅲ patients of both sexes aged 21-60 yr undergoing cardiac valve replacement under CPB were randomly assigned to one of 2 groups(n=11 each):control group(group C)and NAC group.In NAC group NAC 100 mg/kg was added to the priming solution and 50 mg/kg to crystalloid eardioplegic solution,while in control group normal was used instead of NAC.Swan-Gang catheter was placed.Heart rate(HR),mean arterial pressure(MAP),central venous pressure(CVP),pulmonary medal pressure(PAP),pulmonary capillary wedg pressure(PCWP),cardiac output(CO)and cardiac index(CI)were recorded at 10 min beforeanesthesia induction and at the end of operation.Blood samples were collected before operation and at 0.5,6,12 and 24 h after release of the aortic cross-clamp for determination of blood gas analysis,plasma IL-6,TNF-α,MDA and cTnI concentrations and SOD activity.Myocardial specimens were obtained from right atrium for detection of apeptosis(by TUNEL)and examination of ultrastructure with scanning electron microscope.Results There was no significant difference in HR,MAP,CVP,PAP,PCWP,PaO2,Hct,PaCO2,pH value and BE between bothgroups.The plasma concentrations of MDA,IL-6,TNF-α and eTnI weFe significantly lower,while plasma SOD activity CO and CI were higher in group NAC than in group C.NAC significantly decreased myocardial apeptosis and damage induced by myocardial I/R during CPB.Conclusion NAC can protect myocardium against I/R injury induced by CPB.     

N-乙酰半胱氨酸对体外循环下心脏瓣膜置换术患者心肌缺血再灌注损伤的影响

Objective To investigate the effects of N-acetylcysteine(NAC)on myocardial ischemia-reperfusion(I/R)injury in patients undergoing cardiac valve replacement under cardiopulmonary bypass(CPB).Methods Twenty-two ASA Ⅱ or Ⅲ patients of both sexes aged 21-60 yr undergoing cardiac valve replacement under CPB were randomly assigned to one of 2 groups(n=11 each):control group(group C)and NAC group.In NAC group NAC 100 mg/kg was added to the priming solution and 50 mg/kg to crystalloid eardioplegic solution,while in control group normal was used instead of NAC.Swan-Gang catheter was placed.Heart rate(HR),mean arterial pressure(MAP),central venous pressure(CVP),pulmonary medal pressure(PAP),pulmonary capillary wedg pressure(PCWP),cardiac output(CO)and cardiac index(CI)were recorded at 10 min beforeanesthesia induction and at the end of operation.Blood samples were collected before operation and at 0.5,6,12 and 24 h after release of the aortic cross-clamp for determination of blood gas analysis,plasma IL-6,TNF-α,MDA and cTnI concentrations and SOD activity.Myocardial specimens were obtained from right atrium for detection of apeptosis(by TUNEL)and examination of ultrastructure with scanning electron microscope.Results There was no significant difference in HR,MAP,CVP,PAP,PCWP,PaO2,Hct,PaCO2,pH value and BE between bothgroups.The plasma concentrations of MDA,IL-6,TNF-α and eTnI weFe significantly lower,while plasma SOD activity CO and CI were higher in group NAC than in group C.NAC significantly decreased myocardial apeptosis and damage induced by myocardial I/R during CPB.Conclusion NAC can protect myocardium against I/R injury induced by CPB.     

N-乙酰半胱氨酸对体外循环下心脏瓣膜置换术患者心肌缺血再灌注损伤的影响

Objective To investigate the effects of N-acetylcysteine(NAC)on myocardial ischemia-reperfusion(I/R)injury in patients undergoing cardiac valve replacement under cardiopulmonary bypass(CPB).Methods Twenty-two ASA Ⅱ or Ⅲ patients of both sexes aged 21-60 yr undergoing cardiac valve replacement under CPB were randomly assigned to one of 2 groups(n=11 each):control group(group C)and NAC group.In NAC group NAC 100 mg/kg was added to the priming solution and 50 mg/kg to crystalloid eardioplegic solution,while in control group normal was used instead of NAC.Swan-Gang catheter was placed.Heart rate(HR),mean arterial pressure(MAP),central venous pressure(CVP),pulmonary medal pressure(PAP),pulmonary capillary wedg pressure(PCWP),cardiac output(CO)and cardiac index(CI)were recorded at 10 min beforeanesthesia induction and at the end of operation.Blood samples were collected before operation and at 0.5,6,12 and 24 h after release of the aortic cross-clamp for determination of blood gas analysis,plasma IL-6,TNF-α,MDA and cTnI concentrations and SOD activity.Myocardial specimens were obtained from right atrium for detection of apeptosis(by TUNEL)and examination of ultrastructure with scanning electron microscope.Results There was no significant difference in HR,MAP,CVP,PAP,PCWP,PaO2,Hct,PaCO2,pH value and BE between bothgroups.The plasma concentrations of MDA,IL-6,TNF-α and eTnI weFe significantly lower,while plasma SOD activity CO and CI were higher in group NAC than in group C.NAC significantly decreased myocardial apeptosis and damage induced by myocardial I/R during CPB.Conclusion NAC can protect myocardium against I/R injury induced by CPB.     

N-乙酰半胱氨酸对体外循环下心脏瓣膜置换术患者心肌缺血再灌注损伤的影响

Objective To investigate the effects of N-acetylcysteine(NAC)on myocardial ischemia-reperfusion(I/R)injury in patients undergoing cardiac valve replacement under cardiopulmonary bypass(CPB).Methods Twenty-two ASA Ⅱ or Ⅲ patients of both sexes aged 21-60 yr undergoing cardiac valve replacement under CPB were randomly assigned to one of 2 groups(n=11 each):control group(group C)and NAC group.In NAC group NAC 100 mg/kg was added to the priming solution and 50 mg/kg to crystalloid eardioplegic solution,while in control group normal was used instead of NAC.Swan-Gang catheter was placed.Heart rate(HR),mean arterial pressure(MAP),central venous pressure(CVP),pulmonary medal pressure(PAP),pulmonary capillary wedg pressure(PCWP),cardiac output(CO)and cardiac index(CI)were recorded at 10 min beforeanesthesia induction and at the end of operation.Blood samples were collected before operation and at 0.5,6,12 and 24 h after release of the aortic cross-clamp for determination of blood gas analysis,plasma IL-6,TNF-α,MDA and cTnI concentrations and SOD activity.Myocardial specimens were obtained from right atrium for detection of apeptosis(by TUNEL)and examination of ultrastructure with scanning electron microscope.Results There was no significant difference in HR,MAP,CVP,PAP,PCWP,PaO2,Hct,PaCO2,pH value and BE between bothgroups.The plasma concentrations of MDA,IL-6,TNF-α and eTnI weFe significantly lower,while plasma SOD activity CO and CI were higher in group NAC than in group C.NAC significantly decreased myocardial apeptosis and damage induced by myocardial I/R during CPB.Conclusion NAC can protect myocardium against I/R injury induced by CPB.     

N-乙酰半胱氨酸对体外循环下心脏瓣膜置换术患者心肌缺血再灌注损伤的影响

Objective To investigate the effects of N-acetylcysteine(NAC)on myocardial ischemia-reperfusion(I/R)injury in patients undergoing cardiac valve replacement under cardiopulmonary bypass(CPB).Methods Twenty-two ASA Ⅱ or Ⅲ patients of both sexes aged 21-60 yr undergoing cardiac valve replacement under CPB were randomly assigned to one of 2 groups(n=11 each):control group(group C)and NAC group.In NAC group NAC 100 mg/kg was added to the priming solution and 50 mg/kg to crystalloid eardioplegic solution,while in control group normal was used instead of NAC.Swan-Gang catheter was placed.Heart rate(HR),mean arterial pressure(MAP),central venous pressure(CVP),pulmonary medal pressure(PAP),pulmonary capillary wedg pressure(PCWP),cardiac output(CO)and cardiac index(CI)were recorded at 10 min beforeanesthesia induction and at the end of operation.Blood samples were collected before operation and at 0.5,6,12 and 24 h after release of the aortic cross-clamp for determination of blood gas analysis,plasma IL-6,TNF-α,MDA and cTnI concentrations and SOD activity.Myocardial specimens were obtained from right atrium for detection of apeptosis(by TUNEL)and examination of ultrastructure with scanning electron microscope.Results There was no significant difference in HR,MAP,CVP,PAP,PCWP,PaO2,Hct,PaCO2,pH value and BE between bothgroups.The plasma concentrations of MDA,IL-6,TNF-α and eTnI weFe significantly lower,while plasma SOD activity CO and CI were higher in group NAC than in group C.NAC significantly decreased myocardial apeptosis and damage induced by myocardial I/R during CPB.Conclusion NAC can protect myocardium against I/R injury induced by CPB.     

N-乙酰半胱氨酸对体外循环下心脏瓣膜置换术患者心肌缺血再灌注损伤的影响

Objective To investigate the effects of N-acetylcysteine(NAC)on myocardial ischemia-reperfusion(I/R)injury in patients undergoing cardiac valve replacement under cardiopulmonary bypass(CPB).Methods Twenty-two ASA Ⅱ or Ⅲ patients of both sexes aged 21-60 yr undergoing cardiac valve replacement under CPB were randomly assigned to one of 2 groups(n=11 each):control group(group C)and NAC group.In NAC group NAC 100 mg/kg was added to the priming solution and 50 mg/kg to crystalloid eardioplegic solution,while in control group normal was used instead of NAC.Swan-Gang catheter was placed.Heart rate(HR),mean arterial pressure(MAP),central venous pressure(CVP),pulmonary medal pressure(PAP),pulmonary capillary wedg pressure(PCWP),cardiac output(CO)and cardiac index(CI)were recorded at 10 min beforeanesthesia induction and at the end of operation.Blood samples were collected before operation and at 0.5,6,12 and 24 h after release of the aortic cross-clamp for determination of blood gas analysis,plasma IL-6,TNF-α,MDA and cTnI concentrations and SOD activity.Myocardial specimens were obtained from right atrium for detection of apeptosis(by TUNEL)and examination of ultrastructure with scanning electron microscope.Results There was no significant difference in HR,MAP,CVP,PAP,PCWP,PaO2,Hct,PaCO2,pH value and BE between bothgroups.The plasma concentrations of MDA,IL-6,TNF-α and eTnI weFe significantly lower,while plasma SOD activity CO and CI were higher in group NAC than in group C.NAC significantly decreased myocardial apeptosis and damage induced by myocardial I/R during CPB.Conclusion NAC can protect myocardium against I/R injury induced by CPB.     

N-乙酰半胱氨酸对体外循环下心脏瓣膜置换术患者心肌缺血再灌注损伤的影响

Objective To investigate the effects of N-acetylcysteine(NAC)on myocardial ischemia-reperfusion(I/R)injury in patients undergoing cardiac valve replacement under cardiopulmonary bypass(CPB).Methods Twenty-two ASA Ⅱ or Ⅲ patients of both sexes aged 21-60 yr undergoing cardiac valve replacement under CPB were randomly assigned to one of 2 groups(n=11 each):control group(group C)and NAC group.In NAC group NAC 100 mg/kg was added to the priming solution and 50 mg/kg to crystalloid eardioplegic solution,while in control group normal was used instead of NAC.Swan-Gang catheter was placed.Heart rate(HR),mean arterial pressure(MAP),central venous pressure(CVP),pulmonary medal pressure(PAP),pulmonary capillary wedg pressure(PCWP),cardiac output(CO)and cardiac index(CI)were recorded at 10 min beforeanesthesia induction and at the end of operation.Blood samples were collected before operation and at 0.5,6,12 and 24 h after release of the aortic cross-clamp for determination of blood gas analysis,plasma IL-6,TNF-α,MDA and cTnI concentrations and SOD activity.Myocardial specimens were obtained from right atrium for detection of apeptosis(by TUNEL)and examination of ultrastructure with scanning electron microscope.Results There was no significant difference in HR,MAP,CVP,PAP,PCWP,PaO2,Hct,PaCO2,pH value and BE between bothgroups.The plasma concentrations of MDA,IL-6,TNF-α and eTnI weFe significantly lower,while plasma SOD activity CO and CI were higher in group NAC than in group C.NAC significantly decreased myocardial apeptosis and damage induced by myocardial I/R during CPB.Conclusion NAC can protect myocardium against I/R injury induced by CPB.     

N-乙酰半胱氨酸对体外循环下心脏瓣膜置换术患者心肌缺血再灌注损伤的影响

Objective To investigate the effects of N-acetylcysteine(NAC)on myocardial ischemia-reperfusion(I/R)injury in patients undergoing cardiac valve replacement under cardiopulmonary bypass(CPB).Methods Twenty-two ASA Ⅱ or Ⅲ patients of both sexes aged 21-60 yr undergoing cardiac valve replacement under CPB were randomly assigned to one of 2 groups(n=11 each):control group(group C)and NAC group.In NAC group NAC 100 mg/kg was added to the priming solution and 50 mg/kg to crystalloid eardioplegic solution,while in control group normal was used instead of NAC.Swan-Gang catheter was placed.Heart rate(HR),mean arterial pressure(MAP),central venous pressure(CVP),pulmonary medal pressure(PAP),pulmonary capillary wedg pressure(PCWP),cardiac output(CO)and cardiac index(CI)were recorded at 10 min beforeanesthesia induction and at the end of operation.Blood samples were collected before operation and at 0.5,6,12 and 24 h after release of the aortic cross-clamp for determination of blood gas analysis,plasma IL-6,TNF-α,MDA and cTnI concentrations and SOD activity.Myocardial specimens were obtained from right atrium for detection of apeptosis(by TUNEL)and examination of ultrastructure with scanning electron microscope.Results There was no significant difference in HR,MAP,CVP,PAP,PCWP,PaO2,Hct,PaCO2,pH value and BE between bothgroups.The plasma concentrations of MDA,IL-6,TNF-α and eTnI weFe significantly lower,while plasma SOD activity CO and CI were higher in group NAC than in group C.NAC significantly decreased myocardial apeptosis and damage induced by myocardial I/R during CPB.Conclusion NAC can protect myocardium against I/R injury induced by CPB.     

N-乙酰半胱氨酸对体外循环下心脏瓣膜置换术患者心肌缺血再灌注损伤的影响

Objective To investigate the effects of N-acetylcysteine(NAC)on myocardial ischemia-reperfusion(I/R)injury in patients undergoing cardiac valve replacement under cardiopulmonary bypass(CPB).Methods Twenty-two ASA Ⅱ or Ⅲ patients of both sexes aged 21-60 yr undergoing cardiac valve replacement under CPB were randomly assigned to one of 2 groups(n=11 each):control group(group C)and NAC group.In NAC group NAC 100 mg/kg was added to the priming solution and 50 mg/kg to crystalloid eardioplegic solution,while in control group normal was used instead of NAC.Swan-Gang catheter was placed.Heart rate(HR),mean arterial pressure(MAP),central venous pressure(CVP),pulmonary medal pressure(PAP),pulmonary capillary wedg pressure(PCWP),cardiac output(CO)and cardiac index(CI)were recorded at 10 min beforeanesthesia induction and at the end of operation.Blood samples were collected before operation and at 0.5,6,12 and 24 h after release of the aortic cross-clamp for determination of blood gas analysis,plasma IL-6,TNF-α,MDA and cTnI concentrations and SOD activity.Myocardial specimens were obtained from right atrium for detection of apeptosis(by TUNEL)and examination of ultrastructure with scanning electron microscope.Results There was no significant difference in HR,MAP,CVP,PAP,PCWP,PaO2,Hct,PaCO2,pH value and BE between bothgroups.The plasma concentrations of MDA,IL-6,TNF-α and eTnI weFe significantly lower,while plasma SOD activity CO and CI were higher in group NAC than in group C.NAC significantly decreased myocardial apeptosis and damage induced by myocardial I/R during CPB.Conclusion NAC can protect myocardium against I/R injury induced by CPB.