Anesth Analg:硬膜外导管的大小和流速是否影响不同程序化间歇硬膜外注射方式的注射压力:体外研究

2018-08-12 李华宇 罂粟花

用于分娩镇痛的最佳程序化间歇硬膜外推注方式仍然未知。一些研究表明硬膜外腔中更好的药物扩散是由于注射压力增加引起的; 然而,缺乏关于使用硬膜外输注泵对不同导管和流速所产生的最大压力的数据。

背景与目的

用于分娩镇痛的最佳程序化间歇硬膜外推注方式仍然未知。一些研究表明硬膜外腔中更好的药物扩散是由于注射压力增加引起的; 然而,缺乏关于使用硬膜外输注泵对不同导管和流速所产生的最大压力的数据。

方  法

我们评估了11种常用硬膜外导管的流速和压力特征,并结合3种不同的输液泵,根据设置的间歇性硬膜外推注方式进行硬膜外输注。在100,250和400m.h-1的流速下测量压力变化,且推注体积为10mL。为了避免重复测量,使用线性混合模型。通过逐步筛选特征,直到模型中仅剩下统计学上具有显着差异的变量。

结  果

我们进行了660次测量。对于不同的流速和导管设计,在推注期间产生的平均最大压力范围为86至863mmHg。流速和导管规格之间的相互作用导致18G,19G和20G导管的压力分别增加1.31,1.65和2.00mmHg,以1mL.h-1增加流速(P <.001)。包括对钢丝增强导管的分析显示,对于18G,19G和20G导管,以1mL.h-1增加流速,压力分别增加1.16,1.76和2.36 mmHg(P <.001)。在某些情况下,它会触发输注泵堵塞警报。

结  论

在各种导管和流速组合中的体外最大压力值中存在显着差异,对于研究中使用的钢丝增强导管压力值更高。最佳的流速和硬膜外导管组合可允许药物以高流速输注而不触发输注泵堵塞警报。

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    2019-07-02 AspirantSuo

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病例分享:硬膜外导管拔出困难一例

女,21岁,剖宫产术后。2013年4月24日入院,于当晚零时行剖宫产手术,25日1:00结束,麻醉按操作常规进行,L3~4行腰硬联合麻醉,麻醉操作顺利,平稳,手术顺利。术后行PCEA. 26日取泵,却无法拔出硬膜外导管,经两位医生共同协作摆不同体位仍然不能拔出。 拔管困难的原因分析: 1、脊柱关节突卡死硬膜外管,无法拔出。 2、硬膜外导管拔管时造成死结。 处理