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目的：认识膀胱输尿管返流（ＶＵＲ）出现在膀胱充盈期和排尿期的意义。方法：２０例ＶＵＲ患儿做排尿性膀胱尿道造影（ＭＣＵ）复查时，电视间断监视膀胱充盈期，发现返流拍片。另外，常规于排尿期拍片。结果：２０例患儿，２例返流消失，１８例仍有返流。其中８例双侧输尿管返流，１０例单侧返流，共２６侧返流。２６侧返流中，１２侧返流只出现于排尿期；余１４侧返流在膀胱充盈期就已出现，并且其返流程度在排尿期加重。结论：排尿期出现返流，是因膀胱输尿管抗返流结构有缺陷不能抵抗排尿压，使尿液在排尿期返流入输尿管。当抗返流结构的缺陷进一步加重，不能抵抗膀胱充盈期压，尿液就在较低的充盈压作用下返流入输尿管。充盈期出现返流，提示抗返流结构存在严重的缺陷。
Objective: To understand the significance of vesicoureteral reflux (VUR) in bladder filling and urination. Methods: Twenty patients with VUR underwent urinary bladder and urethroprography (MCU) review. The TV intermittently monitored bladder filling and found reflux film. In addition, routine filming in the voiding period. Results: In 20 cases, 2 cases of reflux disappeared and 18 cases still had reflux. 8 cases of bilateral ureteral reflux, 10 cases of unilateral reflux, a total of 26 side reflux. In 26 side regurgitation, 12 side regurgitation occurred only in the urination period; more than 14 side regurgitation occurred in the period of bladder filling, and the degree of regurgitation in the urinary exacerbation. CONCLUSIONS: During the urination, reflux occurs because the ureter anti-reflux structure is defective and can not resist the pressure of urination. Urine can be refluxed into the ureter during urination. When the anti-reflux structure defects further aggravate, can not resist the bladder filling pressure, urine in the filling pressure under the lower pressure into the ureter. Reflux during filling shows that the anti-reflux structure has serious defects.