Thind P, Lose G
Department of Urology, Righospitalet, University of Copenhagen, Denmark.
Br J Urol. 1992 Jan;69(1):75-8. doi: 10.1111/j.1464-410x.1992.tb15463.x.
Urethral stress relaxation was induced by sudden forced dilatation. The stress relaxation parameter, Pt0.5, was defined as the relative pressure decrease 0.5 s after dilatation, where the pressures at 0.1 s and at the new equilibrium were set to 100% and 0% respectively. Pt0.5 was calculated in 28 healthy and 30 women with genuine stress incontinence. Measurements were performed at the bladder neck, in the high pressure zone and in the distal urethra. The measurements showed that all along the urethra, Pt0.5 was statistically significantly greater in the healthy women than in the incontinent women, the greatest difference being found at the bladder neck. Although there was a slight overlap in values between the 2 groups, this parameter seems useful in differentiating between competent and incompetent urethral sphincters.
通过突然强制扩张诱导尿道应力松弛。应力松弛参数Pt0.5定义为扩张后0.5秒时的相对压力下降，其中0.1秒时的压力和新平衡时的压力分别设定为100%和0%。在28名健康女性和30名真性压力性尿失禁女性中计算Pt0.5。在膀胱颈、高压区和尿道远端进行测量。测量结果表明，在整个尿道中，健康女性的Pt0.5在统计学上显著高于尿失禁女性，在膀胱颈处差异最大。尽管两组之间的值略有重叠，但该参数似乎有助于区分尿道括约肌功能正常和功能不全。
