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• W1969244734 abstract "No AccessJournal of UrologyInvestigative Urology1 Aug 1995A Minipig Model for Urodynamic Evaluation of Infravesical Obstruction and its Possible Reversibilityis corrected byUrodynamic Evaluation of Intravesical Obstruction Zhichen Guan, George Kiruluta, Bo Coolsaet, and Mostafa* Elhilali Zhichen GuanZhichen Guan More articles by this author , George KirulutaGeorge Kiruluta More articles by this author , Bo CoolsaetBo Coolsaet More articles by this author , and Mostafa* ElhilaliMostafa* Elhilali More articles by this author View All Author Informationhttps://doi.org/10.1016/S0022-5347(01)67115-5AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract Purpose: The aim of our study was to create reproducible partial bladder outlet obstruction and to evaluate the resulting urodynamic changes. Materials and Methods: Thirty-one female Yucatan microswine were randomly divided into obstructed and control groups. In the obstructed group of 21 animals, an artificial 4.5-cm. sphincter cuff was placed around the bladder neck. Fourteen of these minipigs were eventually deobstructed. In the controls (unobstructed sham-operated group), the sphincter cuff was removed prior to closure. Urodynamic measurements were conducted at 2, 4, 8 and 12 weeks postobstruction in conscious animals restrained in specially designed adjustable cages. Results: (with all pressures in cm.H2 O): 1) Unobstructed sham controls: Pdet, open 28.8, Pdet (Qmax) 22.5, Qmax 30.8 ml. per second, Pdet, isv 61.7, urethral resistance relation (URA) 7.7 cm.H2 O, and Watts factor (WF) 4.7 W/m.2; 2) Obstructed group: P sub det, open 85.2; Pdet (Qmax) 94.4, Qmax 5.6 ml. per second, Pdet, isv 135.2, mean URA 74.3 cm.H2 O and WF 13.5 W/m.2; 3) De-obstructed group: Pdet, open 39.9, Pdet (Qmax) 25.9, Qmax 25.O ml. per second, Pdet, isv 58.0, mean URA 8.9 cm.H2 O and WF 5.4 W/m.2. Conclusion: This animal model of reversible infravesical obstruction has given consistent and reproducible pressure flow data in the conscious, upright state. References 1 : Changes in contractile properties in hypertrophic rat urinary bladder. J. Urol.1982; 128: 1340. Link, Google Scholar 2 : The effect of short-term obstruction on urinary bladder function in the rabbit. J. Urol.1984; 132: 789. Link, Google Scholar 3 : Creation of a feline model of obstructive uropathy. J. Urol.1991; 145: 859. Link, Google Scholar 4 : Experimental studies of ureteral peristaltic patterns in the pig: I. Similarity of pig and human ureter and bladder physiology. J. Urol.1961; 85: 145. Abstract, Google Scholar 5 : The pathogenesis of reflux nephropathy (chronic atrophic pyelonephritis). Br. J. Radiol.,1975; 13: 1. Google Scholar 6 : Reflux and renal scarring. Br. J. Radiol.1978; 1. Google Scholar 7 : An experimental model of detrusor instability in the obstructed pig. Br. J. Urol.1985; 57: 292. Google Scholar 8 : Some theoretical aspects of urethral resistance. Invest. Urol.1964; 1: 477. Medline, Google Scholar 9 : Cystometric, physiological and morphological studies after relief of bladder outflow obstruction in the pig. Br. J. Urol.1991; 68: 243. Google Scholar 10 : Hydrodynamics of micturition–Theory of steady flow through elastic-walled tubes. Med. Biol. Eng.1971; 9: 581. Google Scholar 11 : The assessment of prostatic obstruction from urodynamic measurements and from residual urine. Br. J. Urol.1979; 51: 129. Crossref, Medline, Google Scholar 12 : The contribution of bladder outlet to the relation between pressure and flow rate during micturition. In: Benign Prostatic Hypertrophy.. Edited by . New York-Heidelberg-Berlin: Springer1983: 470. Google Scholar 13 : Urodynamic assessment of bladder function. Br. J. Urol.1977; 49: 29. Google Scholar 14 : Synchronous video pressure-flow cystourethrography. Urol. Clin. North Am.1979; 6: 93. Google Scholar 15 : The stop-flow test. In: Principles of Bladder Function and Urodynamics.. Edited by . Utrecht: Lameris1981: 37. Google Scholar 16 : Quantification of urethral resistance and bladder function during voiding, with special reference to the effects of prostate size reduction on urethral obstruction due to benign prostatic hyperplasia. Neurourol. Urodyn.1989; 8: 17. Google Scholar 17 : A conscious minipig model for evaluating the lower urinary tract. Neurourol. Urodyn.1994; 13: 147. Google Scholar 18 : Acute biochemical and functional alterations in the partially obstructed rabbit. J. Urol.1986; 136: 1324. Abstract, Google Scholar 19 : Experimental bladder hyperreflexia in pigs. Urol. Res.1983; 11: 239. Google Scholar 20 : Detrusor properties related to prostatism. Neurourol. Urodyn.1986; 5: 435. Google Scholar Department of Urology, Norman Bethune University of Medical Science, Chang Chun, China, the Department of Urology, McGill University, Montreal, Quebec, Canada and the Department of Urology, Klina Hospital, Kapellen, Belgium.© 1995 by American Urological Association, Inc.FiguresReferencesRelatedDetailsCited byRULE A, JACOBSON D, McGREE M, GIRMAN C, LIEBER M and JACOBSEN S (2018) LONGITUDINAL CHANGES IN POST-VOID RESIDUAL AND VOIDED VOLUME AMONG COMMUNITY DWELLING MENJournal of Urology, VOL. 174, NO. 4 Part 1, (1317-1322), Online publication date: 1-Oct-2005.RODRIGUES P, LUCON A, FREIRE G and ARAP S (2018) URODYNAMIC PRESSURE FLOW STUDIES CAN PREDICT THE CLINICAL OUTCOME AFTER TRANSURETHRAL PROSTATIC RESECTIONJournal of Urology, VOL. 165, NO. 2, (499-502), Online publication date: 1-Feb-2001.O'Connor L, Vaughan E and Felsen D (2018) In Vivo Cystometric Evaluation of Progressive Bladder Outlet Obstruction in RatsJournal of Urology, VOL. 158, NO. 2, (631-635), Online publication date: 1-Aug-1997.Sullivan M and Yalla S (2018) Detrusor Contractility and Compliance Characteristics in Adult Male Patients With Obstructive and Nonobstructive Voiding DysfunctionJournal of Urology, VOL. 155, NO. 6, (1995-2000), Online publication date: 1-Jun-1996.Related articlesJournal of Urology9 Nov 2018Urodynamic Evaluation of Intravesical Obstruction Volume 154Issue 2August 1995Page: 580-586 Advertisement Copyright & Permissions© 1995 by American Urological Association, Inc.MetricsAuthor Information Zhichen Guan More articles by this author George Kiruluta More articles by this author Bo Coolsaet More articles by this author Mostafa* Elhilali More articles by this author Expand All Advertisement PDF downloadLoading ..." @default.
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