静脉血气分析及其临床应用进展

Venous blood gas analysis and its clinical significance

动脉血气分析是严重心肺疾病和许多代谢性疾病的重要检测手段 ,在血流动力学稳定状态下 ,动、静脉血气的CO2 气体含量和酸碱参数非常接近 ,但在循环功能衰竭等情况下 ,动、静脉血气出现分离现象 ,此时可能需同时作静脉血气。静脉血气分析对危重患者特别是循环衰竭的患者可以提供组织氧合和酸碱状态更切实的评价 ,并可能对有效复苏提供更好的指导。

The measurement of arterial blood gases is critically important in caring for patients with advanced cardiopulmonary disease and a variety of metabolic disorders. Under stable hemodynamic conditions the acid-base values in arterial blood are close to those in venous blood, However, the significant arteriovenous differences in pH and PaCO 2 were found in patients with circulatory compromise. The appropriate monitoring of acid-base composition and oxygenation in patients with circulatory failure requires venous blood sampling in addition to the sampling of arterial blood. Venous blood gases can provide an assessment of tissue acidity and oxygenation and may be taken as a better indication of the efficacy of resuscitation in patients with circulatory compromise.