Barbalias G A, Klauber G T, Blaivas J G
J Urol. 1983 Oct;130(4):720-3. doi: 10.1016/s0022-5347(17)51423-8.
The efficacy of Credé's maneuver to promote voiding was evaluated prospectively in 207 patients with a variety of lower urinary tract disorders. The normal response to Credé's maneuver was a contraction of the external urethral sphincter (the Credé effect), an increase in urethral pressure and maintained closure of the vesical neck. Relaxation of the external urethral sphincter and synchronous opening of the bladder neck during Credé's maneuver were seen in only 4 patients (2 per cent). We conclude that Credé's maneuver is an inefficient method of bladder emptying in the majority of patients and even when voiding is accomplished with Credé's maneuver it usually is grossly inefficient and associated with significant urethral obstruction.
前瞻性评估了克勒德手法促进排尿在207例患有各种下尿路疾病患者中的疗效。对克勒德手法的正常反应是尿道外括约肌收缩（克勒德效应）、尿道压力升高以及膀胱颈持续关闭。在克勒德手法过程中，仅4例患者（2%）出现尿道外括约肌松弛和膀胱颈同步开放。我们得出结论，在大多数患者中，克勒德手法是一种低效的膀胱排空方法，即使通过克勒德手法实现了排尿，通常也极其低效且伴有明显的尿道梗阻。
