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首页> 外文期刊>Journal of International Medical Research >Direct Measurement of Nitric Oxide during Experimental Cardiopulmonary Bypass
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Direct Measurement of Nitric Oxide during Experimental Cardiopulmonary Bypass

机译:在实验性心肺旁路手术中直接测量一氧化氮

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We developed a system to measure nitric oxide (NO) concentration during cardiopulmonary bypass in anaesthetized pigs (n = 6). A T-shaped connector, attached to an NO sensor, was mounted in the extra-corporeal circuit at two measuring sites: proximal to the membrane oxygenator (venous side) and distal to the arterial line filter (arterial side). After performing a preliminary validation study, we measured plasma NO concentration before and during total cardiopulmonary bypass circulation (non-pulsatile flow 1.5 l/min) and without pulmonary ventilation. After establishing bypass, PaO2 was 318-393 mmHg; when PaO2 was decreased to 80-100 mmHg, plasma NO concentration in the arterial circuit fell by 39.2 ± 15.6 nM. There was no observable change in plasma NO concentration at the venous circuit. This new system could be useful in monitoring NO concentration during cardiac surgery with cardiopulmonary bypass, and for understanding the possible pathophysiological roles of hyper-nitric oxaemia in cardiopulmonary bypass-related cardiovascular complications.
机译:我们开发了一种在麻醉的猪(n = 6)的体外循环过程中测量一氧化氮(NO)浓度的系统。将T型连接器连接到NO传感器上,安装在体外回路中的两个测量位置:膜式充氧器的近端(静脉侧)和动脉管路过滤器的远端(动脉侧)。进行初步验证研究后,我们在不进行肺通气的情况下,在体外循环全循环(非脉动流量1.5 l / min)之前和期间测量血浆NO浓度。建立旁路后,PaO2为318-393 mmHg;当PaO2降至80-100 mmHg时,动脉回路中的血浆NO浓度下降了39.2±15.6 nM。静脉回路中血浆NO浓度无明显变化。该新系统可用于监测有心肺分流术的心脏手术过程中的NO浓度,并有助于了解高血氧血症在心肺分流术相关的心血管并发症中可能的病理生理作用。

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