Suter P M, Lindauer J M, Fairley H B, Schlobohm R M
Crit Care Med. 1975 Sep-Oct;3(5):175-81. doi: 10.1097/00003246-197509000-00001.
Blood gas values were obtained from Swan-Ganz pulmonary artery catheters in 25 patients with acute pulmonary failure, with the objective of evaluating the possibility of contamination with "arterialized" blood and examining the mechanism by which this might happen. Blood oxygen content increased significantly from the main to a segmental pulmonary artery, proportional to the withdrawal rate of the sample. At 3 ml/min, distal contents ranged from 100 to 116% of proximal values (p less than 0.01). At 23 ml/min the range was 100-140% of proximal values (p less than 0.001). Sampling of blood from a Swan-Ganz catheter in the usual position for "wedge" pressure measurement, but with a balloon deflated, may lead to large errors in calculation of cardiac output by the Fick method and in calculation of intrapulmonary shunt fraction.
对25例急性肺衰竭患者，通过Swan-Ganz肺动脉导管获取血气值，目的是评估“动脉化”血液污染的可能性，并研究其可能发生的机制。从主肺动脉到肺段动脉，血氧含量显著增加，与样本抽取速率成正比。抽取速率为3 ml/min时，远端血液含量为近端的100%至116%（p<0.01）。抽取速率为23 ml/min时，该范围为近端的100%至140%（p<0.001）。在测量“楔压”的常规位置、球囊未充气的情况下，从Swan-Ganz导管采血，可能会导致用Fick法计算心输出量以及计算肺内分流分数时出现较大误差。
