远端缺血预处理在婴幼儿心脏外科手术中的心肺保护作用

目的 观察远端缺血预处理对婴幼儿心肺功能的保护作用.方法 将48例先天性心脏病患儿随机分为远端缺血预处理组(RIPC组)和对照组.分别在麻醉诱导后,超滤结束时,ICU1、3、6、12、24 h采集血标本,测定肌钙蛋白I(cTnI)浓度,记录动脉血氧分压、气道阻力、氧和指数、肺顺应性.结果 术后RIPC组血清cTnI升高水平低于对照组,但差异无统计学意义(P＞0.05),RIPC组ICU 3 h血清cTnI水平显著低于对照组(10.8±8.5比16.3±15.9,P＜0.01).ICU时间RIPC组高于对照组[(4±2)d比(3±1)d,P＜0.05).结论 远端缺血预处理对心肌的缺血再灌注损伤有保护作用,对肺功能未产生有利影响.

Abstract：

Objective To investigate the protective effect of remote ischemic preconditioning (RIPC) on infants subject to cardiac surgery. Methods Forty-eighty infants were randomized into two groups: RIPC group ( n = 24) and control group ( n = 24). Blood samples were taken after the induction of anesthesia, at the end of ultrafiltration, and at 1,3, 6, 12 and 24 h after ICU arrival for determination of plasma cardiac troponin I (cTnI) concentrations. The pulmonary functional data including artery blood oxygen pressure (PaO2), airway resistance, oxygenation index (OI) and pulmonary compliance were recorded. Results Levels of plasma cTnI were lower in RIPC group than in control group, but there was no significant difference ( P ＞ 0. 05). Levels of plasma cTnI at 3 h after ICU arrival in RIPC group were markedly lower than in control group ( 10. 8 ± 8.5 vs. 16. 3 ± 15.9,P ＜ 0. 01 ). The ICU time in RIPC group was significantly longer than in control group[(4 ± 2) days vs. (3 ± 1 ) days,P ＜ 0. 05 )]. Conclusion RIPC appears to protect the heart against ischemia-reperfusion injury, but can not improve the pulmonary function or the postoperative clinical course in the settings of cardiac surgery of infants.

Protective effect of remote ischemic preconditioning on infants undergoing open heart surgery

Objective To investigate the protective effect of remote ischemic preconditioning (RIPC) on infants subject to cardiac surgery. Methods Forty-eighty infants were randomized into two groups: RIPC group ( n = 24) and control group ( n = 24). Blood samples were taken after the induction of anesthesia, at the end of ultrafiltration, and at 1,3, 6, 12 and 24 h after ICU arrival for determination of plasma cardiac troponin I (cTnI) concentrations. The pulmonary functional data including artery blood oxygen pressure (PaO2), airway resistance, oxygenation index (OI) and pulmonary compliance were recorded. Results Levels of plasma cTnI were lower in RIPC group than in control group, but there was no significant difference ( P ＞ 0. 05). Levels of plasma cTnI at 3 h after ICU arrival in RIPC group were markedly lower than in control group ( 10. 8 ± 8.5 vs. 16. 3 ± 15.9,P ＜ 0. 01 ). The ICU time in RIPC group was significantly longer than in control group[(4 ± 2) days vs. (3 ± 1 ) days,P ＜ 0. 05 )]. Conclusion RIPC appears to protect the heart against ischemia-reperfusion injury, but can not improve the pulmonary function or the postoperative clinical course in the settings of cardiac surgery of infants.