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A probe which permits continuous measurement of the related values of pressure and cross-sectional area in the female urethra was used to provide a quantitative description of the adjunctive occlusive forces in terms of pressure and power (mWatt) generation. Measurements were carried out at the bladder neck, midurethrally and distally in the urethra in 30(More)
The continence mechanism of the female urethra has been investigated by a method that makes possible simultaneous recording of an induced intraurethral pressure and the related cross-sectional area. Muscular work, power and velocity of contraction could be calculated on the basis of these recordings at rest and during voluntary contractions of the pelvic(More)
The prevalence and type of urinary voiding problems were prospectively investigated in 77 men and four women (median age 36 years) with HIV infection or AIDS consecutively attending an outpatient clinic. Urologic symptoms were registered from replies to a questionnaire and urologic evaluation was made when indicated. All patients were neurologically(More)
A probe for measurement of related values of cross sectional area (c.a.) and pressure in the resting female urethra has been developed. C.a. can be measured in the range 0.07 to 0.79 cm2 by means of the field gradient principle. Pressure is measured in the range 0 to 150 cm H2O. Pressure needed for inflation and deflation of the balloon ranges from +4 to -5(More)
The aim of this retrospective study is to provide morphometric data which make grading of urinary bladder tumours objective and reproducible by stereological estimation of nuclear volume using the principle of estimating of the volume of particles of arbitrary shape. The study includes 92 specimens: 12 from normal bladder mucosa, and 80 from bladder tumours(More)
In a 10-year period, 15 patients were treated with bladder distension because of urinary symptoms associated with detrusor instability. All patients had failed to respond to previous drug therapy. Ten patients had previously undergone surgical procedures for urinary incontinence, also without success. Five patients had repeated bladder distensions performed(More)
UNLABELLED What's known on the subject? and What does the study add? In the 1980s and 1990s, a method for direct measurement of pressure and cross-sectional area in women and men was developed. It was successful in terms of obtaining meaningful results in several studies. But the technique, which was based on the field gradient principle, was never(More)
The field-gradient principle has been used in the development of a probe for the recording of related values of cross-sectional area and pressure in the resting female urethra. The probe is used in a manner that allows pressure to be increased in steps of 10 cm. water, distending the urethra up to a cross-sectional area of 0.79 cm.2. Recordings are(More)
A new probe was used to examine 16 female volunteers. The probe makes possible recording of related values of induced increasing and decreasing urethral pressures, and cross-sectional area in the resting female urethra. From diagrams showing these relationships urethral rigidity, defined as the change in urethral pressure divided by the change in(More)