瑞芬太尼预处理对非体外循环冠脉搭桥术患者血浆肌钙蛋白Ⅰ的影响

目的 应用心肌肌钙蛋白I(cTnI)评价瑞芬太尼预处理对非体外循环冠脉搭桥(OPCAB)患者的心肌保护作用.方法 选择24例行OPCAB的冠心病患者,随机分为瑞芬太尼预处理组(R组)和对照组(C组).所有患者术前口服安定10mg,肌肉注射吗啡10mg、东莨菪碱0.3 mg,全麻诱导静脉注射咪唑安定0.08 mg/kg,依托咪酯0.1～0.3 mg/kg,芬太尼5～10 μg/kg,罗库溴铵1 mg/kg诱导,吸人1 MAC异氟醚,持续静脉输注异丙酚0.8~2μ/ml;间断给予芬太尼5～10μg/kg,哌库溴铵0.05 mg/kg.R组:瑞芬太尼5 μg/kg溶于50 ml生理盐水,于麻醉诱导后10 min恒速泵完.C组:泵注同等容量生理盐水.测定术前、术毕及术后1、6、24、48h血浆cTnI水平.结果 各组内术后cTnI水平均明显增高(P<0.05).R组术后cTnI水平显著低于C组(P<0.05).结论 瑞芬太尼预处理可降低OPCAB患者的cTnI水平,减轻心肌损伤.

Abstract：

Objective To investigate the value of cardiac troponin I (cTnI) levels in assessing myocardial protection by remifentanil precondition against myocardial. injury induced by off-pump coronary artery bypass (OPCAB). Methods Twenty-four patients undergoing OPCAB were randomized into control and remifentanil preconditioning group (n=12). All the patients received pretreatment with oral diazepam (10 mg), intramuscular morphine (10 mg) and hyosine (0.3 mg). General anesthesia was induced with midazolam (0.08 mg/kg), etomidate (0.1-0.3 mg/kg), fentanyl (5-10 (μg/kg), and rocuronium (1mg/kg), and maintained with isoflurane inhalation and propofol infusion. Intermittent fentanyl and pipecuronium were given intravenously, In remifentanil preconditioning group, remifentanil (5 μg/kg in 50 ml normal saline) was infused in 10 min after anesthesia induction, and only NS was administered in the control group. Blood samples were obtained before and at 0, 2, 6,24, and 48 h after the operation to determine serum cTnI evels. Results In both of the two groups, the cTnI levels increased significantly at the postoperative time points (0, 2, 6, 24, and 48 h) as compared with those before the operation (P<0.05). The cTnI levels of remifentanil preconditioning group were markedly decreased after the operation in comparison with those of the control group (P<0.05). Conclusion Remifentanil preconditioning decreases the cTnI levels and reduces myocardial injury induced by OPCAB.

Remifentanil preconditioning lowers cardiac troponin I levels in patients undergoing off-pump coronary artery bypass graft surgery

Objective To investigate the value of cardiac troponin I (cTnI) levels in assessing myocardial protection by remifentanil precondition against myocardial injury induced by off-pump coronary artery bypass (OPCAB). Methods Twenty-four patients undergoing OPCAB were randomized into control and remifentanil preconditioning group (n=12). All the patients received pretreatment with oral diazepam (10 mg), intramuscular morphine (10 mg) and hyosine (0.3 mg). General anesthesia was induced with midazolam (0.08 mg/kg...