Myrvold H E, Jonsson K O
Scand J Gastroenterol. 1979;14(6):753-9. doi: 10.3109/00365527909181949.
Water-perfused open-tip catheters were used to measure the pressure profiles in the nipple valve of the continent ileostomy. In in vitro studies the conditions required to measure the yield pressure in collapsed vessels like the nipple valve were determined. Flow rates below 4--5 ml/min should not be used when measuring the pressure with open-tip catheters size Ch 8. At lower flow rates the yield pressure was underestimated. When appropriate flow rates were used, a moderate increase of the perfusional flow rate did not increase the measured pressure notably. Measurements were performed in 31 patients with continent or incontinent ileostomy reservoirs. Nineteen patients had outlets with a nipple valve, and 12 patients outlets without such a valve. In most cases it was possible to distinguish a pressure zone in the outlet. The length of the pressure zone was fairly constant in consecutive measurements, whereas the pressure varied, presumably owing to contractile activity, in the outlet. In continent patients with nipple valve outlets the pressure was significantly higher than in patients who were incontinent owing to nipple valve sliding. In patients who were incontinent owing to fistula formation the pressure was of the same order of magnitude as in continent patients.
采用水灌注开放式尖端导管测量可控性回肠造口乳头瓣的压力曲线。在体外研究中，确定了测量如乳头瓣等塌陷血管屈服压力所需的条件。使用Ch 8尺寸的开放式尖端导管测量压力时，流速不应低于4 - 5毫升/分钟。流速较低时，屈服压力会被低估。当使用适当的流速时，灌注流速的适度增加不会显著提高测量压力。对31例有可控或不可控回肠造口贮袋的患者进行了测量。19例患者的出口有乳头瓣，12例患者的出口没有这种瓣膜。在大多数情况下，可以在出口处区分出一个压力区。连续测量时，压力区的长度相当恒定，而出口处的压力则可能由于收缩活动而变化。有乳头瓣出口的可控性患者的压力明显高于因乳头瓣滑动而不可控的患者。因瘘管形成而不可控的患者的压力与可控性患者的压力处于同一数量级。
