Gehani A A, Davies A, Stoodley K, Ashley S, Brook S G, Rees M R
Cardiac Research Unit, Killingbeck Hospital, Leeds, UK.
Cardiovasc Intervent Radiol. 1991 Jul-Aug;14(4):222-7; discussion 227-9. doi: 10.1007/BF02578463.
Angioscopy was used to evaluate the "self-centering" ability of three Kensey catheters (KC) with different flexibility: one 8Fr "peripheral" and two 5Fr "coronary" (I & II). Angioscopic observations were made inside arteries, 5-18 mm in diameter. There was a good correlation between flexibility and self-centering of the KC [r = 0.83, p less than 0.05]. Increasing the flow rate of rinsing solution from 18 to 60 ml/min prolonged coaxial position from 8.9 +/- 3.3 to 36 +/- 2.2 sec/min of activation [p less than 0.001]. A smaller effect on coaxial position was exerted by increasing cam speed from 5.2 +/- 0.7 to 19.2 +/- 1.6 sec/min (p less than 0.001). In conclusion, angioscopy showed that the KC has a limited ability to maintain a coaxial position inside the arterial lumen and operators cannot rely on its self-centering property.
采用血管内镜评估三种不同柔韧性的肯西导管（KC）的“自定心”能力：一根8Fr“外周型”和两根5Fr“冠状动脉型”（I和II）。在直径5 - 18毫米的动脉内进行血管内镜观察。KC的柔韧性与自定心能力之间存在良好的相关性[r = 0.83，p < 0.05]。将冲洗液流速从18毫升/分钟提高到60毫升/分钟，激活时的同轴位置从8.9±3.3秒延长至36±2.2秒/分钟[p < 0.001]。将凸轮速度从5.2±0.7秒/分钟提高到19.2±1.6秒/分钟，对同轴位置的影响较小（p < 0.001）。总之，血管内镜显示KC在动脉腔内维持同轴位置的能力有限，操作者不能依赖其自定心特性。
