Miyagawa I
Urol Int. 1984;39(6):327-31. doi: 10.1159/000281004.
We investigated the intraurethral pressure changes at the external sphincter zone during voiding act and during an attempt to contract the anal sphincter on 26 neurologically intact subjects (normal group) and 12 cases after intrapelvic surgery (6 after amputatio recti and 6 after radical hysterectomy) (disturbed group). During voiding the pressure was decreased in 25 of 26 cases of the normal group, but was increased in 11 of 12 cases of the disturbed group. In contracting the anal sphincter, urethral pressure rose in all cases of both normal and disturbed groups. A significant positive correlation (p less than 0.01) was found in the urethral pressure changes between voiding and during the attempt to contract the anal sphincter in the disturbed group, but not in the normal group. It is supposed that the pressure decreased during voiding is an indication of not only normally functioning external urethral sphincter but also non-underactive detrusor, and that the pressure increase means either underactive detrusor or spastic external urethral sphincter due to detrusor-sphincter dyssynergia. To measure the urethral pressure changes at the external sphincter zone during voiding is thought to be useful for assessment of the urethral resistance at that zone.
我们对26名神经功能正常的受试者（正常组）以及12例盆腔内手术后的患者（6例直肠切除术后和6例根治性子宫切除术后）（功能紊乱组）在排尿过程中以及试图收缩肛门括约肌时尿道外括约肌区域的尿道压力变化进行了研究。排尿时，正常组26例中有25例压力降低，而功能紊乱组12例中有11例压力升高。收缩肛门括约肌时，正常组和功能紊乱组的所有病例尿道压力均升高。在功能紊乱组中，排尿与试图收缩肛门括约肌时的尿道压力变化之间存在显著正相关（p<0.01），而正常组中则不存在。据推测，排尿时压力降低不仅表明尿道外括约肌功能正常，而且逼尿肌也无功能低下，而压力升高意味着逼尿肌功能低下或由于逼尿肌-括约肌协同失调导致尿道外括约肌痉挛。在排尿过程中测量尿道外括约肌区域的尿道压力变化被认为有助于评估该区域的尿道阻力。
