Gennis P R, Skovron M L, Aronson S T, Gallagher E J
Ann Emerg Med. 1985 Sep;14(9):845-9. doi: 10.1016/s0196-0644(85)80631-4.
The usefulness of peripheral venous sampling in determining acid-base status in acutely ill patients was studied. A total of 171 nonarrest patients and 12 patients in cardiac arrest had paired samples of arterial and venous blood compared for correlation of blood gas results. Linear equations relating arterial and venous values of pH, PCO2, and bicarbonate were developed in both groups of patients; however, the accuracy of predicting arterial values from venous values was limited. Severe acid-base disturbances were essentially ruled out by normal or nearly normal venous blood gases. Extremely abnormal venous levels reliably reflected comparable arterial abnormalities. The results suggest that immediate intravenous bicarbonate therapy should be considered for patients with pH less than or equal to 7.05 and PCO2 less than or equal to 40 torr despite the possibility of inadvertent venous sampling. A larger series is needed to verify these results in the setting of cardiac arrest.
研究了外周静脉采血在确定急性病患者酸碱状态方面的实用性。共有171名非心脏骤停患者和12名心脏骤停患者，对其动脉血和静脉血的配对样本进行血气结果相关性比较。两组患者均建立了pH、PCO2和碳酸氢盐的动脉值与静脉值之间的线性方程；然而，根据静脉值预测动脉值的准确性有限。正常或接近正常的静脉血气基本可排除严重的酸碱紊乱。静脉水平极度异常可靠地反映了相应的动脉异常。结果表明，尽管可能存在意外静脉采血的情况，但对于pH值小于或等于7.05且PCO2小于或等于40托的患者，应考虑立即进行静脉注射碳酸氢盐治疗。需要更大规模的系列研究来在心脏骤停情况下验证这些结果。
