机构地区:[1]上海交通大学医学院附属瑞金医院麻醉科,上海200025
出 处:《上海医学》2017年第6期374-378,共5页Shanghai Medical Journal
摘 要:目的前瞻性评价脑氧饱和度(ScO2)与心功能之间的相关性及其临床价值。方法连续入选2014年6月—2015年1月拟在全身麻醉下行不停跳冠状动脉旁路移植术(OPCABG)的患者84例,美国麻醉医师协会(ASA)分级Ⅰ至Ⅳ级。采集患者左侧和右侧ScO2、血流动力学参数[心率(HR)、平均有创动脉压(MAP)、中心静脉压(CVP)、平均肺动脉压(MPAP)、肺动脉楔压(PAWP)]、连续心排量监测指标[心排血量(CO)、心脏指数(CI)、每搏量(SV)、每搏指数(SI)、体循环阻力(SVRI)、肺循环阻力(PVRI)、左心室每搏做功指数(LVSWI)、右心室每搏做功指数(RVSWI)、混合静脉血氧饱和度(SvO2)]、左心室射血分数(LVEF)。以CI中位数2.0为标准,将患者分为心功能正常组(CI>2)和心功能减退组(CI<2),每组42例。比较两组患者ScO2和上述指标的差异,并通过ROC曲线分析ScO2在心功能监测中的临床价值。结果 ScO2与LVEF(r=0.215,P=0.049)、MAP(r=0.248,P=0.023)和MAP与CVP压差(MAP-CVP,r=0.220,P=0.045)呈正相关,与MPAP(r=-0.478,P<0.001)呈负相关,与HR、CVP、PAWP均不相关(P值均>0.05);ScO2与连续心排量监测指标CO(r=0.347,P=0.001)、CI(r=0.276,P=0.011)、SV(r=0.320,P=0.003)、SI(r=0.249,P=0.022)和SvO2(r=0.225,P=0.040)呈正相关,与SVRI(r=-0.418,P<0.001)和PVRI(r=-0.531,P<0.001)呈负相关,与LVSWI和RVSWI均不相关(P值均>0.05)。心功能正常组的ScO2显著高于心功能减退组(P<0.01),CVP、MPAP、PAWP显著低于心功能减退组(P值分别<0.01、0.05)。由于两组以CI中位数进行分组,虽然CO、CI、SV、SI、SVRI、PVRI、LVSWI、RVSWI和SvO2之间的差异均有统计学意义(P值均<0.01),但无临床意义。以心功能评价金标准CI为参照,ROC曲线分析证实,ScO2对心功能监测的临床应用价值(AUC为0.648,95%CI为0.531~0.765,P=0.020)高于经胸心脏超声检查Simpson法计算的LVEF(AUC为0.492,95%CI为0.365~0.620,P=0.904),高于常规血流动力学指标HR(AUC为0.526,95%CI为0.399~0.652,P=0.687)、MAP(AObjective To prospectively evaluate the correlation between cerebral oxygen saturation (ScO2 ) and cardiac function and its clinical values. Methods Eighty-four consecutive American Society of Anesthesiologists (ASA) grade Ⅰ-Ⅳ patients undergoing off-pump coronary artery bypass grafting (OPCABG) receiving general anesthesia were included in this study. ScO2, hemodynamic parameters including heart rate (HR), mean arterial pressure (MAP), central venous pressure (CVP), mean pulmonary arterial pressure (MPAP) and pulmonary artery wedge pressure (PAWP), continuous invasive cardiac output monitoring parameters including cardiac output (CO), cardiac index (el), stroke volume (SV), stroke index (SI), systemic vascular resistance index (SVRI), pulmonary vascular resistance index (PVRI), left ventricular stroke work index (LVSWI), right ventricular stroke work index (RVSWI) and venous oxygen saturation (ScO2) and left ventricular ejection fraction (LVEF) were collected. The patients were divided into normal cardiac function group (n = 42, CI〉2) and cardiac dysfunction group (n=42, CI〈2) according to the median CI. The above-mentioned parameters were compared between the groups. Receiver operating characteristic (ROC) curve analysis was used tO identify the clinical value of ScO2 in the monitoring of cardiac function. Results ScO2 was positively correlated with LVEF (r=0. 215, P=0.049), MAP (r=0.248, P=0.023), differential pressure between MAP and CVP (MAP-CVP, r=0.220, P= 0.045), CO (r=0.347, P=0.001), CI (r=0.276, P=0.011), SV (r=0.320, P=0.003), SI (r=0.249, P = 0. 022) and ScO2 ( r = 0. 225, P = 0. 040). ScO2 was negatively correlated with MPAP ( r = - 0. 478, P〈0.001), SVRI (r= -0.418, P〈0.001) and PVRI (r= -0.531, P〈0.001). But ScO2 was not correlated with HR, CVP, PAWP, LVSWI or RVSWI (all P〉0.05). Compared with those in the cardiac dysfunction group, ScO2 was significan
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