Bedford R F
Anesthesiology. 1977 Jul;47(1):37-9. doi: 10.1097/00000542-197707000-00009.
Radial arterial function was evaluated in 108 patients following 24 hours of percutaneous cannulation with either 18- or 20-gauge cannulas. Arteriography, Doppler ultrasound examination, and Allen's test disclosed an 8 per cent incidence of radial-artery occlusion following cannulation with 20-gauge cannulas, compared with a 34 per cent incidence of occlusion with 18-gauge cannulas (P less than .05). Vessels that occluded were significantly smaller in diameter than were patent vessels (mean 2.00 +/- .09 mm SE vs. 2.22 +/- .05 mm, P less than .05). Occluded vessels also contained significantly greater amounts of thrombotic material (0-3+) just prior to decannulation than those that remained patent (2.42 +/- .13 vs. 1.20 +/- .11,P less than .001). The incidence of arterial occlusion increases linearly as the ratio of cannula outer diameter to vessel-lumen diameter increases.
对108例患者在使用18号或20号套管进行24小时经皮插管后评估桡动脉功能。血管造影、多普勒超声检查和艾伦试验显示，使用20号套管插管后桡动脉闭塞发生率为8%，而使用18号套管插管后闭塞发生率为34%（P<0.05）。闭塞的血管直径明显小于通畅的血管（平均2.00±0.09mm标准误 vs. 2.22±0.05mm，P<0.05）。在拔管前，闭塞血管内的血栓物质含量（0-3+）也明显高于通畅血管（2.42±0.13 vs. 1.20±0.11，P<0.001）。随着套管外径与血管腔直径之比的增加，动脉闭塞的发生率呈线性增加。
