Crit Care:经胸超声心动图是**估测危重患者心输出量的方法!

2017-06-10 xing.T MedSci原创

由此可见,危重病机械通气患者,CO-TTE是一种准确和精准的估算CO的方法,而且,CO-TTE可以准确地追踪CO的变量。

心输出量(CO)监测对危重病人的诊断和治疗有重要价值。在重症监护中,很少研究评估经胸超声心动图测得的CO(CO-TTE)与参考测量方法肺动脉导管测得的CO(CO-PAC)之间的一致性。近日,危重病医学领域权威杂志Critical Care上发表了一篇研究文章,该研究旨在评估危重病机械通气患者采用CO-TTE相对于CO-PAC的精度和准确性,以及评估经胸超声心动图在追踪CO变量上的能力。

研究人员在16个床位的大学医院ICU纳入了38例接受PAC的机械通气患者进行了前瞻性观察研究。通过间歇热稀释法测量CO-PAC是。同时,第二名调查者使用标准的TTE来估计CO-TTE 作为每搏输出量和心率的乘积。

研究人员比较64对CO-PAC和CO-TTE测量指标。两指标均显著相关(r=0.95,P<0.0001)。平均偏差为0.2L/min,一致性的限制(LOAs)是–1.3和1.8L/min,以及误差百分比为25%。CO-PAC和CO-TTE的精度分别为8%和9%。研究人员将26对患者的ΔCO指标进行了比较。ΔCO-PAC和ΔCO-TTE之间存在显著的相关性(r=0.92,P<0.0001)。平均偏差为–0.1L/min,LOAs为-1.3和+1.2 L/min。在15%的隔离区,四象限图有94%的符合率。在0.5L/min的隔离区,极坐标图平均极角为1°和误差百分比LOAs为-26.8到28.8°。在30至-30°之间的符合率为100%。当采用CO-TTE检测时,ΔCO-PAC增幅超过10%,接受者操作特征曲线下面积(95%可信区间)为0.82(0.62-0.94)(P<0.001)。ΔCO-TTE超过8%得到了检测ΔCO-PAC超过10%时88%的敏感性和66%的特异性。

由此可见,危重病机械通气患者,CO-TTE是一种准确和精准的估算CO的方法,而且,CO-TTE可以准确地追踪CO的变量。

原始出处:

Pablo Mercado,et al. Transthoracic echocardiography: an accurate and precise method for estimating cardiac output in the critically ill patient.Critical Care.2017. https://ccforum.biomedcentral.com/articles/10.1186/s13054-017-1737-7

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    2017-06-12 七九九八

    继续努力

    0

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    2017-06-11 杨利洪

    学习了,提高了

    0