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  • 1
    Electronic Resource
    Electronic Resource
    Determinants of cure by endoscopic suspension of the bladder neck in the incontinent female patient (1986)
    Springer
    World journal of urology 4 (1986), S. 10-15 
    Details
    ISSN: 1433-8726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This paper reviews preoperative clinical observations that may predict the postoperative success of patients treated surgically for urinary incontinence. The impact of a surgical procedure on the bladder and urethra is evaluated using data obtained prospectively. All patients reviewed have been operated upon using endoscopic bladder neck suspension only. Parameters considered included the demonstration of urethral incontinence, history of urgency incontinence, prior urogenital surgery, and detrusor stability. The result of endoscopic suspension is evaluated in terms of cure rate or improvement one year after surgery. The postoperative outcome of bladder neck suspension is related to the preoperative considerations of detrusor stability, preoperative urgency and prior surgery. The results show that among the 161 patients complaining of incontinence only about half have demonstrable urethral incontinence. Of these, 23% have detrusor instability in addition to their urethral incontinence. The incidence of detrusor instability among the patients without demonstrable urethral incontinence was 48%. Patients with a stable detrusor preoperatively show the highest surgical cure rate (62% compared to 38% among patients with detrusor instability). Furthermore, patients without previous urogenital surgery that are stable report an even higher cure rate (90%). Presence of preoperative urgency compromises the possibility of complete surgical cure of incontinence. Urgency incontinence is present in approximately 48% of the patients whether stable or unstable. Endoscopic suspension will cure more than half of the patients with urgency incontinence if they have a stable detrusor function by urodynamic criteria preoperatively. However, patients with detrusor instability and urgency incontinence preoperatively are unlikely to report any improvement of their urgency incontinence following surgery. It is concluded that the determinants of successful bladder neck suspension are in order of priority: detrusor stability, preoperative urgency, and prior urogenital surgery.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00326734
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Selective grey level digitization of video images to analyze upper urinary tract dynamics (1988)
    Springer
    World journal of urology 6 (1988), S. 2-5 
    Details
    ISSN: 1433-8726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A method is presented to analyze video recordings of the dynamics of the upper urinary tract. Peristaltic fluid movements are visualized after surgical exposure of the rat ureter. Optical information is recorded through an operating microscope and stored on tape. The computer system reads and analyzes grey-levels upon user-defined measuring lines. One program is especially designed to measure the urine bolus length. The second program determines diameters at 20 equally distributed lines across the ureter. Data are displayed in two- or three-dimensional graphs, time-distance diagrams or series of rough drafts showing the changes of ureteral shape. Numeric values of measured parameters (bolus length and velocity, ureter diameter at 20 lines) can be listed. Diagrams of normal ureteral peristalsis and drafts of contraction-induced changes in ureteral shape (diameters) during acute distal obstruction are explained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00326833
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The origin and propagation of upper urinary tract contraction waves. A new in vitro methodology (1976)
    Springer
    Cellular and molecular life sciences 32 (1976), S. 266-267 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new in vitro experimental method which has enabled direct visualization of the upper urinary tract with minimal damage to the wall of the region is described. Evidence is presented which supports the concept of an autonomous pacemaker system located proximal to the pelviureteric junction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01937802
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Frequency gradient in the autorhythmicity of the pyeloureteral pacemaker system (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 614-615 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The pacemaker properties of the various regions of isolated segments of the rabbit renal pelvis were examined. The results show that pacemaker frequency and waveform of contraction change significantly within the renal pelvis. The highest frequency was encountered at the fornix, while the ureteropelvic junction is lowest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01936991
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Ureteral pacemaker potentials recorded with the sucrose gap technique (1975)
    Springer
    Cellular and molecular life sciences 31 (1975), S. 931-933 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Ureteral contractions occur at intervals which are integral multiples of the period of pacemaker potentials recorded in vitro from the renal pelvis with a sucrose gap, suggesting that a gating mechanism in the pyeloureter regulates the rate at which the pacemaker initiates contractions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02358859
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  • 6
    Electronic Resource
    Electronic Resource
    Velocity gradient and contraction frequency of the pyeloureteral system (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 791-792 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary An optical detection method, using video imaging, is used to quantitatively record the frequency and velocity profile of the renal pelvis of the rabbit. It is demonstrated that concentric waves originating at the periphery of the pelvis have an initial velocity of 3.2 cm/sec, accelerating toward the pelviureteral junction reaching a final velocity of 6.4 cm/sec.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01968251
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Chronic ureteric obstruction and its impact on the coordinating mechanisms of peristalsis (Pyeloureteric Pacemaker System) (1982)
    Springer
    Urological research 10 (1982), S. 267-270 
    Details
    ISSN: 1434-0879
    Keywords: Pyeloureteric Pacemaker ; Diuresis ; Obstruction ; Peristaltic Coordination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We present the results of a study designed to characterise urine transport in the healthy and chronically obstructed upper urinary tract. Fifteen healthy and 11 hydronephrotic pigs were used; experimental hydronephrosis was produced by partially obstructing the ureter. Data consisting of the peristaltic rate, bolus volume, and the urine flow rate were collected and related to varying increments of diuresis. The transmission characteristics of renal pelvic to ureteric contractions were studied by extracellular electrodes. Similarly, in hydronephrotic preparations we studied the transmission between the proximal and middle pelvis to the ureter. In healthy preparations, the contraction frequency of the renal pelvis and the ureter is identical, while in obstructive cases, the contraction frequency of the upper pelvis is not coordinated with the lower pelvis or ureter. While diuresis increased bolus volume to a maximum of 1,200% in the healthy and 660% in the hydronephrotic kidney, the peristaltic rate changed by only 45% and 50% respectively. The results of this study show that chronic ureteric obstruction alters the coordination of ureteric peristalsis and thereby disrupts the pacemaker mechanisms of the renal pelvis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255872
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    MRI of voluntary pelvic floor contractions in healthy female volunteers (1995)
    Springer
    International urogynecology journal 6 (1995), S. 138-152 
    Details
    ISSN: 1433-3023
    Keywords: Bladder ; Continence ; Levator ani ; Physiotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The dynamic anatomical response of the normal pelvic floor to voluntary pelvic floor contractions was documented using magnetic resonance imaging. Sequences of coronal, sagittal and transverse images in the relaxed and the contracted state were obtained from 17 young, asymptomatic volunteers trained to perform pelvic floor exercises correctly. The images were processed digitally and computer colored to indicate dynamic changes produced as a result of contractions. Gross transverse sections through a human female cadaver were photographed and digitized to provide a reference of pelvic anatomy. A 3D rendition of the processed MR images was made to illustrate the extent of pelvic floor contraction. The results illustrate the changes produced by voluntary pelvic floor contractions in all planes scanned. Quantitative measurements of selective structures around the bladder were made to show the magnitude of pelvic floor displacement during contraction. The dynamic imaging illustrates the extent of changes in the normal pelvic floor that are produced by pelvic floor exercises and give a measure of the displacement of the bladder and the levator ani.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01900574
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    Paper (German National Licenses)
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