目的:探讨床旁超声监测左室功能参数结合临床相关指标对静脉-动脉体外膜肺氧合（VA-ECMO）患者的应用价值。方法:采用回顾性研究方法，选取2018年6月至2020年1月在武汉大学人民医院使用VA-ECMO辅助支持的24例患者作为研究对象。收集ECMO支持1 d和脱机前1 d床旁超声心动图检查结果，同时获取脱机前相关临床指标。观察是否脱机成功两组临床参数的差异；采用单因素Logistic回归分析筛选出影响脱机的相关因素，并比较是否脱机成功两组患者左室功能参数的差异。结果:16例患者脱机成功，8例患者脱机失败。与脱机失败组比较，脱机成功组连续性肾脏替代治疗（CRRT）患者数明显减少（例：4比6，n P<0.05），脱机前平均动脉压（MAP）更高〔mmHg（1 mmHg＝0.133 kPa）：84.64±9.55比62.30±8.79，n P<0.05〕，脉搏血氧饱和度（SpOn 2）也更高（0.966±0.670比0.866±0.061，n P<0.05），正性肌力药剂量评分（VIS）、血肌酐（SCr）及血乳酸（Lac）水平更低〔VIS（分）：7.27±1.42比16.93±8.52，SCr（μmol/L）：123.60±83.64比213.10±117.39，Lac（mmol/L）：1.94±0.91比5.62±5.48，均n P<0.05〕。单因素Logstic回归分析显示，脱机前MAP、VIS、SCr、Lac、SpOn 2是影响脱机的相关因素〔优势比（n OR）分别为0.306、-0.740、-0.011、-0.632、-4.069，95%可信区间（95%n CI）分别为1.065～1.732、0.235～0.899、0.979～0.999、0.285～0.992、0.001～0.208，n P值分别为0.014、0.022、0.038、0.047、0.002〕。脱机成功组脱机前1 d左室射血分数（LVEF）、收缩期二尖瓣环侧壁位点运动速度（LatSa）、主动脉最大前向血流速度（AV-Vmax）、左室流出道速度-时间积分（VTI）、左室整体纵向应变（LVGLS）、左室整体纵向应变率（LVGLSr）均较ECMO 1 d明显增加〔LVEF：0.40±0.05比0.28±0.07，LatSa（cm/s）：6.81±0.91比4.62±1.02，AV-Vmax（cm/s）：104.81±33.98比64.44±16.85，VTI（cm）：14.56±3.11比7.96±1.98，LVGLS：（-8.95±2.59）%比(-5.26±1.28)%，LVGLSr（1/s）：-0.48±0.11比-0.29±0.09〕，而ECMO流量显著降低（L/min：1.46±0.47比2.64±0.31），差异均有统计学意义（均n P<0.05）。而脱机失败组ECMO 1 d与脱机前1 d左室功能参数比较差异均无统计学意义。与脱机失败组比较，ECMO脱机前1 d，脱机成功组有更高的LVEF、LatSa、AV-Vmax、VTI、LVGLS、LVGLSr 〔LVEF：0.40±0.05比0.26±0.07，LatSa（cm/s）：6.81±0.91比4.31±1.03，AV-Vmax（cm/s）：104.81±33.98比67.67±18.46，VTI（cm）：14.56±3.11比7.75±2.77，LVGLS：（-8.95±2.59）%比（-4.84±1.81）%，LVGLSr（1/s）：-0.48±0.11比-0.30±0.10，均n P<0.05〕，更低的ECMO流量（L/min：1.46±0.47比2.20±0.62，n P<0.05）。n 结论:床旁超声心动图左室功能参数（LVEF、LatSa、AV-Vmax、VTI、LVGLS、LVGLSr）结合临床指标（MAP、VIS、SCr、Lac、SpOn 2）有助于评价接受VA-ECMO支持患者的疗效，并能为VA-ECMO患者脱机时机的选择和预后判断提供重要指导价值。n “,”Objective:To explore the monitoring value of left ventricular functional parameters obtained by bedside ultrasound combined with clinically relevant indicators in patients with veno-arterial extracorporeal membrane oxygenation (VA-ECMO).Methods:A retrospective study was conducted. A total of 24 patients receiving VA-ECMO adjuvant support in Renmin Hospital of Wuhan University from June 2018 to January 2020 were selected. The bedside ultrasound was performed on the first day of ECMO support, the day before weaning, the clinical indicators before weaning were obtained. The differences in clinical indicators and the left ventricular functional parameters between the two groups of whether weaning successfully were compared; univariate Logistic regression analysis was used to screen out the related factors affecting weaning.Results:Sixteen patients were successful weaned and 8 patients failed. Compared with the weaning failure group, patients in the weaning success group required less continuous renal replacement therapy (CRRT, cases: 4 vs. 6, n P < 0.05), mean arterial pressure (MAP) before weaning was higher [mmHg (1 mmHg = 0.133 kPa): 84.64±9.55 vs. 62.30±8.79, n P < 0.05], and the pulse oxygen saturation (SpOn 2) was also higher (0.966±0.670 vs. 0.866±0.061, n P < 0.05), while vasoactive-inotropic score (VIS), serum creatinine (SCr) and serum lactic acid (Lac) were lower [VIS score: 7.27±1.42 vs. 16.93±8.52, SCr (μmol/L): 123.60±83.64 vs. 213.10±117.39, Lac (mmol/L): 1.94±0.91 vs. 5.62±5.48, all n P < 0.05]. Univariate Logistic regression analysis showed that the MAP, VIS, SCr, Lac, SpO n 2 before weaning were the related factors affecting weaning [odds ratio (n OR) were 0.306, -0.740, -0.011, -0.632, -4.069; 95% confidence interval (95%n CI) were 1.065-1.732, 0.235-0.899, 0.979-0.999, 0.285-0.992 and 0.001-0.208; n P values were 0.014, 0.022, 0.038, 0.047, 0.002]. In the weaning success group, left ventricular ejection fraction (LVEF), velocity of mitralannulus in systolic (LatSa), maximum flow velocity of aortic valve (AV-Vmax), velocity-time integral (VTI), left ventricular global longitudinal strain (LVGLS), left ventricular global longitudinal strain rate (LVGLSr) were all increased on the day before ECMO weaning compared with the first day of ECMO support [LVEF: 0.40±0.05 vs. 0.28±0.07, LatSa (cm/s): 6.81±0.91 vs. 4.62±1.02, AV-Vmax (cm/s): 104.81±33.98 vs. 64.44±16.85, VTI (cm): 14.56±3.11 vs. 7.96±1.98, LVGLS: (-8.95±2.59)% vs. (-5.26±1.28)%, LVGLSr (1/s): -0.48±0.11 vs. -0.29±0.09], whereas the ECMO flow was significantly reduced (L/min: 1.46±0.47 vs. 2.64±0.31), the differences were statistically significant (alln P < 0.05). There was no significant difference in left ventricular functional parameters between the first day of ECMO support and the day before ECMO weaning in the weaning failure group. Compared with the weaning failure group, the weaning success group had higher LVEF, LatSa, AV-Vmax, VTI, LVGLS, LVGLSr on the day before ECMO weaning [LVEF: 0.40±0.05 vs. 0.26±0.07, LatSa (cm/s): 6.81±0.91 vs. 4.31±1.03, AV-Vmax (cm/s): 104.81±33.98 vs. 67.67±18.46, VTI (cm): 14.56±3.11 vs. 7.75±2.77, LVGLS: (-8.95±2.59)% vs. (-4.81±1.81)%, LVGLSr (1/s): -0.48±0.11 vs. -0.30±0.10, all n P < 0.05] and lower ECMO flow (L/min: 1.46±0.47 vs. 2.20±0.62, n P < 0.05).n Conclusion:Bedside echocardiographic left ventricular function parameters (LVEF, LatSa, AV-Vmax, VTI, LVGLS, LVGLSr) combined with clinical indicators (MAP, VIS, SCr, Lac, SpOn 2) were helpful to evaluate the therapeutic effect of patients receiving VA-ECMO support and can provide important guiding value in the selection of VA-ECMO weaning timing and the judgment of prognosis.n