Hermieu J F, Ravery V, Le Coent R, Delmas V, Boccon-Gibod L
Clinique Urologique, Hôpital Bichat, Paris, France.
Prog Urol. 1998 Dec;8(6):1035-8.
To determine whether the presence of a 6F catheter in the urethra modifies uroflowmetric parameters in a population of men with benign prostatic hyperplasia.
260 patients, 45 to 86 years old, presenting with benign prostatic hyperplasia, underwent two uroflowmetries, one with the urethra free, the other with a 6F urethral catheter. Patients with a history of neurological disease, diabetes mellitus, prostatic cancer, lower urinary tract surgery or taking drugs likely to affect micturition, were excluded from the study. Maximum flow rate (Qmax) and voided volume were then compared during the 2 recordings, using Wilcoxon's non parametric test.
No significant difference was observed between voided volumes in the 2 groups (m: 207 ml versus m: 226 ml), but a very significant difference was observed for maximum flow rate measurements (m: 8.62 ml/s versus m: 6.97 ml/s p = 0.0001).
The presence of an urethral catheter, even small calibre (6F), modifies the flow rate by more than 1.5 ml/s. This element must be taken into account when performing and interpreting measurements of the pressure-flow relationship in men.
确定在患有良性前列腺增生的男性群体中，尿道内留置6F导管是否会改变尿流率参数。
260例年龄在45至86岁之间的良性前列腺增生患者接受了两次尿流率测定，一次是在尿道无导管时进行，另一次是在尿道留置6F导管时进行。有神经疾病、糖尿病、前列腺癌、下尿路手术史或正在服用可能影响排尿药物的患者被排除在研究之外。然后使用Wilcoxon非参数检验比较两次记录期间的最大尿流率（Qmax）和排尿量。
两组的排尿量之间未观察到显著差异（均值：207毫升对均值：226毫升），但在最大尿流率测量方面观察到非常显著的差异（均值：8.62毫升/秒对均值：6.97毫升/秒，p = 0.0001）。
即使是小口径（6F）的尿道导管，也会使尿流率改变超过1.5毫升/秒。在对男性进行压力 - 流率关系测量并进行解读时，必须考虑到这一因素。
