Low J A, Armstrong J B, Mauger G M
Department of Obstetrics and Gynecology, Queen's University, Kingston, Ontario, Canada.
Obstet Gynecol. 1989 Jul;74(1):69-74.
The clinical and urodynamic characteristics of 54 women with unstable urethras (falls of urethral pressures of at least 20 cm H2O) were compared with those of 171 patients with stable urethras. The unstable-urethra patients were younger and presented with an increased incidence of marked urgency and a lower incidence of genuine stress incontinence. The average urethral pressure fall was preceded by a 6-cm increase in maximum urethral pressure. The mean (+/- SD) fall of urethral pressure was 30 +/- 12 cm H2O and the average duration of the event was 8 seconds. The level of the urethral pressure fall was not influenced by bladder volume but correlated positively with higher maximum urethral pressures. The present findings suggest that the unstable urethra plays a limited role in genuine stress incontinence but may be linked with the unstable detrusor.
将54例尿道不稳定（尿道压力下降至少20 cm H₂O）女性的临床和尿动力学特征与171例尿道稳定患者的特征进行了比较。尿道不稳定的患者更年轻，明显尿急的发生率增加，而真正压力性尿失禁的发生率较低。在平均尿道压力下降之前，最大尿道压力增加了6 cm。尿道压力的平均（±标准差）下降为30±12 cm H₂O，事件的平均持续时间为8秒。尿道压力下降的程度不受膀胱容量的影响，但与较高的最大尿道压力呈正相关。目前的研究结果表明，不稳定尿道在真正压力性尿失禁中起的作用有限，但可能与逼尿肌不稳定有关。
