Rhythmic pressure variations in urethra and anal canal: Investigations in healthy fertile female volunteers
✍ Scribed by Dr. S. Sørensen; H. Gregersen; S. M. Sørensen; J. C. Djurhuus; C. E. Constantinou
- Book ID
- 102540785
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 471 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0733-2467
No coin nor oath required. For personal study only.
✦ Synopsis
Ten healthy fertile female volunteers underwent one hour continuous urethral and anal canal pressure recordings. The recordings showed a median maximum urethral pressure (mMUP), of 74.0 cm H,O and a median maximum and canal pressure (mMAP) of 50.0 cm H,O. The anal canal pressure variations (APV) showed the same frequency domains as found in the urethra ranging from 0.001 to 0.03 Hz. Thc APV amplitude was correspondingly diminished and the two pressure tracings were out of phase indicating the urethral pressure variations (UPV) and APV to be separate intrinsic spontaneous activities of the urethra and anal canal.
Twenty-six months prior to the present study the women had a similar urethral pressure recording. Comparison of the mMUP, maximum urethral closure pressure (mMUCP), and UPV frequency and amplitude showed no difference between the two periods. The intraindividual variation was lower than the interindividual variation meaning that the individual woman had rather stable urethral pressures, whereas there was a considerable variation betwcen the women. The rhythmic UPV frequencies and amplitudes were stable during the two year period.
Consequently the study underlines the consistency of urethral pressure. The comparative investigations of urethral and anal pressure add evidence to our pressure statements that they originate from smooth muscle activity.