Anesth Analg:剖宫产术中左右趾灌注指数预测腰麻后低血压的不同作用

2017-12-04 王贵龙 “罂粟花”微信号

妊娠子宫对下腔静脉的压迫和腰麻对交感神经的阻滞引起血管扩张是剖宫产术中腰麻后低血压的主要机制。手指灌注指数(PI)可通过反映基础血管张力从而预测腰麻后低血压,但不能反映下腔静脉的受压情况。本研究主要探讨腰麻前后足趾PI的变化是否可以预测腰麻后低血压的发生,以及是否可以反映妊娠子宫对下腔静脉的压迫情况。

背景与目的:妊娠子宫对下腔静脉的压迫和腰麻对交感神经的阻滞引起血管扩张是剖宫产术中腰麻后低血压的主要机制。手指灌注指数(PI)可通过反映基础血管张力从而预测腰麻后低血压,但不能反映下腔静脉的受压情况。本研究主要探讨腰麻前后足趾PI的变化是否可以预测腰麻后低血压的发生,以及是否可以反映妊娠子宫对下腔静脉的压迫情况。

方  法:本研究共纳入100名行择期剖宫产的产妇。腰麻后,将2只监测PI探头分别放在产妇的左右第二脚趾上,连续监测脚趾PI和灌注变异指数(PVI),血压测量间隔从每3分钟改为每1分钟一次,直到胎儿娩出,比较左右脚趾PIs数据。

结  果:左脚趾PI的ROC曲线下面积为0.81(95%CI:0.71~0.88),右脚趾PI的ROC曲线下面积为0.76(95%CI:0.66~0.84)。腰麻后,低血压状态下脚趾PIs并不会发生变化,但未发生低血压的产妇PIs会显着增加。

结  论:本研究表明剖宫产术期间基础脚趾PIs与低血压的发生呈反向变化。腰麻后持续PIs持续监测有助于预测低血压的发生及反映下腔静脉受压情况。

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    2017-12-11 AspirantSuo
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    2018-01-02 经常头晕
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