输尿管内支架对兔上尿路尿流动力学的影响

目的 探讨输尿管内支架对兔输尿管蠕动和肾盂压的影响及随时间的变化。方法 将40只青紫蓝兔随机分为对照组及留置输尿管内支架0、1、2、3、4、7、12周组，共8组，每组5只。对照组不留置内支架，其余各组经膀胱留置右侧输尿管内支架。0周组留置内支架后即进行实验，余下的各组依次在留管1、2、3、4、7、12周后进行实验，观察输尿管蠕动和肾盂压的变化。结果 留置内支架后肾盂压先升高，随着时间的推移逐渐下降；留置内支架期间末发现输尿管蠕动。结论 对正常的上尿路，内支架是一个梗阻因素。

Effects of ureteral stents on rabbit upper urinary tract urodynamics]

OBJECTIVE: To explore the effects of ureteral stent placement on ureteral peristalsis and the time course of renal pelvic pressure changes. METHOD: Forty rabbits were randomized equally into 8 groups, including a control group without placement of ureteral stents. The other 7 groups received ureteral stent placement, which were retained for 0, 1, 2, 3, 4, 7, and 12 weeks respectively. When the rabbits were bred for the specified time periods, ureteral peristalsis was observed and renal pelvic pressure measured. RESULT: The renal pelvic pressure was initially increased after the stent placement, but then followed by gradual decreases. Ureteral peristalsis was not observed after the stent placement. CONCLUSION: Ureteral stent is a factor for causing obstruction in normal ureter.