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https://www.readbyqxmd.com/read/28538709/minimal-invasive-cystometry-and-intra-abdominal-pressure-assessments-in-rodents-a-novel-animal-study
#1
Yafei Yang, Jin Yang, Lin Chen, Jianyun Hu, Shasha Xing, Bastian Amend, Arnulf Stenzl, Xin Wei, Haifeng Hu
BACKGROUND The abdominal straining pattern can act as a novel parameter for improving the prediction of bladder outlet obstruction (BOO). To preserve detrusor function in the early stage of urinary system impairment, such as BOO, we establish a novel method for cystometry and Intra-abdominal pressure (IAP) assessments in rodents without cystostomy. MATERIAL AND METHODS Twenty mice and rats were divided into three groups (control, sham-operated and BOO group) respectively. The cystometry and IAP assessments were measured by the pediatric venous indwelling sheath and coronary dilatation catheter connected to Laborie urodynamic system on postoperative day 7...
May 24, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28537696/electron-microscopic-changes-of-detrusor-in-benign-enlargement-of-prostate-and-its-clinical-correlation
#2
Sher Singh Yadav, Rohit Bhattar, Lokesh Sharma, Gautam Banga, Trilok Chandra Sadasukhi
AIMS: To study the ultra structural changes in bladder musculature in cases of BPE and their clinical relevance. MATERIAL AND METHODS: In this descriptive longitudinal, controlled, observational study patients were enrolled into three groups, group 1, group 2A and group 2B. Control group (group-1) consisted of age matched normal male patients, who underwent surveillance or diagnostic cystoscopy for microscopic hematuria or irritative symptoms. Case group (group-2) comprised of patients with BPE, undergoing TURP...
May 23, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/28511871/effect-of-distigmine-on-the-contractile-response-of-guinea-pig-urinary-bladder-to-electrical-field-stimulation
#3
Keisuke Obara, Yurina Kobayashi, Daisuke Chino, Yoshio Tanaka
Distigmine bromide (distigmine) is a reversible carbamate group cholinesterase (ChE) inhibitor. Although mainly used clinically for the treatment of myasthenia gravis, distigmine is also indicated for detrusor underactivity in Japan. According to the pharmacological classification of distigmine, its therapeutic effect against detrusor underactivity appears to be produced by enhanced urinary bladder smooth muscle (UBSM) contractility due to an increased concentration of acetylcholine between parasympathetic nerve endings and UBSM cells...
May 13, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28506097/a-computational-model-of-the-ca-2-transients-and-influence-of-buffering-in-guinea-pig-urinary-bladder-smooth-muscle-cells
#4
Vijay Dave, Rohit Manchanda
Many cellular events including electrical activity and muscle contraction are regulated and coordinated by intracellular [Formula: see text] concentration ([[Formula: see text]][Formula: see text]. In detrusor smooth muscle (DSM) cells, [[Formula: see text]]i is normally maintained at very low levels and rises transiently during signalling processes as a result of (i) influx from the extracellular space (mainly via L-type and T-type [Formula: see text] channels) and (ii) [Formula: see text] release from sarcoplasmic reticulum (SR) into the cytoplasm...
April 20, 2017: Journal of Bioinformatics and Computational Biology
https://www.readbyqxmd.com/read/28490527/reversible-plasticity-of-detrusor-smooth-muscle-evidence-for-a-key-role-of-slipping-actomyosin-crossbridges-in-the-control-of-urinary-bladder-compliance
#5
https://www.readbyqxmd.com/read/28437806/potential-of-bryophyllum-pinnatum-as-a-detrusor-relaxant-an-in-vitro-exploratory-study
#6
Simon Bachmann, Cornelia Betschart, Julia Gerber, Karin Fürer, Mónica Mennet, Matthias Hamburger, Olivier Potterat, Ursula von Mandach, Ana Paula Simões-Wüst
An earlier prospective, randomised, placebo-controlled clinical trial had suggested that Bryophyllum pinnatum might have potential in the treatment of overactive bladder. Here we investigated the effects of B. pinnatum leaf press juice, fractions enriched in flavonoids and bufadienolides, and a flavonoid aglycon mixture and individual aglycons on detrusor contractility as a major target in overactive bladder treatment. The strength of the detrusor contractions was investigated using porcine muscle strips stimulated with KCl...
April 24, 2017: Planta Medica
https://www.readbyqxmd.com/read/28419532/electromyography-in-the-assessment-and-therapy-of-lower-urinary-tract-dysfunction-in-adults
#7
REVIEW
Jan Krhut, Roman Zachoval, Peter F W M Rosier, Beth Shelly, Peter Zvara
AIM: To present the teaching module "Electromyography in the assessment and therapy of lower urinary tract dysfunction in adults." This teaching module embodies a presentation, in combination with this manuscript. This manuscript serves as a scientific background review; the evidence base made available on ICS website to summarize current knowledge and recommendations. METHODS: This review has been prepared by a Working Group of The ICS Urodynamics Committee. The methodology used included comprehensive literature review, consensus formation by the members of the Working Group, and review by members of the ICS Urodynamics Committee core panel...
April 18, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28417339/expression-and-function-of-the-small-conductance-ca-2-activated-k-channel-is-decreased-in-urinary-bladder-smooth-muscle-cells-from-female-guinea-pig-with-partial-bladder-outlet-obstruction
#8
Ning Li, Honglin Ding, Xiaoning He, Zizheng Li, Yili Liu
PURPOSE: Overactive bladder (OAB), usually accompanied by partial bladder outlet obstruction (PBOO), is associated with detrusor overactivity (DO) which is related to the increased urinary bladder smooth muscle (UBSM) cells excitability. Small-conductance Ca(2+)-activated K(+) (SK) channels play a constitutive regulatory role of UBSM excitability and contractility. PBOO is associated with the decreased SK channels mRNA expression and the attenuated regulative effect of SK channels on UBSM contractility...
April 17, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28413135/a-systematic-review-of-the-diagnosis-and-treatment-of-patients-with-neurogenic-hyperactivity-of-the-detrusor-muscle
#9
A Borau, J M Adot, M Allué, S Arlandis, D Castro, M Esteban, J Salinas
BACKGROUND: Neurogenic detrusor hyperactivity (NDH) is a urodynamic observation characterised by involuntary detrusor contractions during the filling phase that are caused by an underlying neurological disease. The common and severe complications that can result from NDH warrant the preparation of healthcare protocols for the proper management of patients with NDH. OBJECTIVE: The aim of this study is to standardise the criteria for the decision-making process in the management of patients with diagnosed or suspected NDH, providing personalised medical care...
April 13, 2017: Actas Urologicas Españolas
https://www.readbyqxmd.com/read/28398951/challenges-in-pathologic-staging-of-bladder-cancer-proposals-for-fresh-approaches-of-assessing-pathologic-stage-in-light-of-recent-studies-and-observations-pertaining-to-bladder-histoanatomic-variances
#10
REVIEW
Gladell P Paner, Rodolfo Montironi, Mahul B Amin
The paradigm of pathologic stage (pT) categorization in bladder cancer remains the depth of invasion into the different histologic layers of the bladder wall. However, the approaches to assigning pT stage category toward an enhanced outcome stratification have been marked by challenges and innovations, due in part to our growing appreciation of the surprisingly perplexing bladder histoanatomy. Upstaging of pT1 tumors after radical cystectomy is substantial and underscores the potential value of pT1 substaging in transurethral resection (TUR) specimens...
May 2017: Advances in Anatomic Pathology
https://www.readbyqxmd.com/read/28396595/p2y6-deficiency-increases-micturition-frequency-and-attenuates-sustained-contractility-of-the-urinary-bladder-in-mice
#11
Satoru Kira, Mitsuharu Yoshiyama, Sachiko Tsuchiya, Eiji Shigetomi, Tatsuya Miyamoto, Hiroshi Nakagomi, Keisuke Shibata, Tsutomu Mochizuki, Masayuki Takeda, Schuichi Koizumi
The role of the P2Y6 receptor in bladder function has recently attracted a great deal of attention in lower urinary tract research. We conducted this study to determine contributions of the P2Y6 receptor in lower urinary tract function of normal phenotypes by comparing P2Y6-deficient mice and wild-type mice. In in vivo experiments, P2Y6-deficient mice had more frequent micturition with smaller bladder capacity compared to wild-type mice; however, there was no difference between these groups in bladder-filling pressure/volume relationships during cystometry under decerebrate, unanaesthetized conditions...
April 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28394495/effect-of-naftopidil-on-bladder-microcirculation-in-a-rat-model-of-bladder-outlet-obstruction
#12
Tsuyoshi Majima, Tokunori Yamamoto, Yasuhito Funahashi, Shun Takai, Yoshihisa Matsukawa, Masaki Yoshida, Momokazu Gotoh
OBJECTIVES: To evaluate the effect of naftopidil on bladder capillary blood flow using bladder outlet obstruction model rats. METHODS: Female Sprague-Dawley rats were divided into three groups: control group, bladder-outlet-obstruction group, and bladder-outlet-obstruction + naftopidil group. Bladder-outlet-obstruction surgery was performed in the bladder-outlet-obstruction and bladder-outlet-obstruction + naftopidil groups. The control group received sham-operation...
May 2017: Lower Urinary Tract Symptoms
https://www.readbyqxmd.com/read/28381080/bladder-endometriosis-a-summary-of-current-evidence
#13
Carlo Saccardi, Amerigo Vitagliano, Pietro Litta
Bladder endometriosis is a specific form of endometriosis characterized by the presence of endometrial glands and stroma in the detrusor muscle. Such disease may involve different sites of the bladder, most frequently the base and the dome, with various grade of infiltration. Bladder nodules typically coexists with other localizations of deep pelvic endometriosis, resulting in a wide variety of abdominal and urinary symptoms that may be overlooked by clinicians. In spite of advances in understanding the genetic and molecular development of endometriosis, the clinical approach to bladder lesions is very challenging and may require the use of different diagnostic tools in order to set up a comprehensive diagnostic workup and direct towards the most appropriate treatment...
April 4, 2017: Minerva Ginecologica
https://www.readbyqxmd.com/read/28380161/associated-factors-to-urinary-incontinence-in-women-undergoing-urodynamic-testing
#14
Juliana Cristina Pereira da Silva, Zaida Aurora Sperli Geraldes Soler, Anneliese DominguesWysocki
OBJECTIVE: Analyzing factors associated with urinary incontinence (UI) among women submitted to urodynamic testing. METHOD: A cross-sectional study of 150 women attended at a urological center. Data were analyzed using univariate and multivariate statistics. RESULTS: White women (79.3%), overweight (45.3%), menopausal (53.3%), who drink coffee (82.7%), sedentary (65.3%), who had vaginal birth (51.4%), with episiotomy (80%), and who underwent the Kristeller maneuver (69%)...
April 3, 2017: Revista da Escola de Enfermagem da U S P
https://www.readbyqxmd.com/read/28361520/on-the-site-and-mechanism-of-action-of-%C3%AE-3-adrenoceptor-agonists-in-the-bladder
#15
REVIEW
Karl Erik Andersson
The clinical success of mirabegron as the first β3-adrenoceptor (AR) agonist for treatment of the overactive bladder (OAB) syndrome, has resulted in substantial interest in its site and mechanism of action. Even if the adrenergic innervation of the bladder and urethra has been well studied, the location(s) of β3-ARs in different structures within the bladder wall and urethra, and the mode(s) of action of β3-AR stimulation have still not been established. The recent demonstration of β3-ARs on cholinergic nerve terminals with no immunoreactivity in urothelium or detrusor smooth muscle, is not in agreement with previous morphological studies, and functional data strongly suggest that β3-ARs can be found these structures...
March 24, 2017: International Neurourology Journal
https://www.readbyqxmd.com/read/28361518/ketanserin-and-naftopidil-enhance-the-potentiating-effect-of-alpha-methyl-serotonin-on-the-neurally-induced-contraction-of-human-isolated-urinary-bladder-muscle-strips
#16
Tsuyoshi Hattori, Philippe Lluel, Céline Rouget, Moèz Rekik, Mitsuharu Yoshiyama
PURPOSE: The aim of this study was to assess the potential involvement of a specific subtype of 5-hydroxytryptamine (5-HT), 5HT2 receptors in neurally-induced contractions of the human detrusor. METHODS: Contractile responses to electrical field stimulation (EFS) were examined in human isolated urinary bladder muscle strips. The potentiation of EFS-induced detrusor contraction was examined by adding cumulative concentrations of a 5-HT and 5-HT2 receptor agonist, α-methyl-serotonin (α-Me-5-HT) (1nM-100μM) in the presence or absence of a 5-HT2 antagonist, ketanserin (5-HT2A>5-HT2C) or naftopidil (5-HT2B>5-HT2A) (0...
March 24, 2017: International Neurourology Journal
https://www.readbyqxmd.com/read/28356291/slowly-cycling-rho-kinase-dependent-actomyosin-crossbridge-slippage-explains-intrinsic-high-compliance-of-detrusor-smooth-muscle
#17
Christopher J Neal, Jia Bao Lin, Tanner Hurley, Amy S Miner, John E Speich, Adam P Klausner, Paul H Ratz
Biological soft tissues are viscoelastic because they display time-independent pseudo-elasticity and time-dependent viscosity. Upon an imposed ramp increase then decrease in strain, the resultant stress changes, termed loading and unloading respectively, produce nonlinear stress-strain curves and a reversible reduction in the stress-strain work area that identifies viscosity. However, there is evidence that bladder may also display plasticity; an increase in strain that is unrecoverable unless work is done by the muscle...
March 29, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28346720/videourodynamic-analysis-of-the-urethral-sphincter-overactivity-and-the-poor-relaxing-pelvic-floor-muscles-in-women-with-voiding-dysfunction
#18
Chung-Hsin Peng, Sheng-Fu Chen, Hann-Chorng Kuo
AIMS: Voiding dysfunction due to dysfunctional voiding (DV) and poor relaxation of the external sphincter (PRES) are commonly found among adult women with lower urinary tract symptoms (LUTS) during videourodynamic study (VUDS). This study analyzed the VUDS characteristics of DV and PRES in female voiding dysfunction. METHODS: This retrospective study involved 1914 women aged >18 years with refractory LUTS. The medical records and the VUDS parameters were reviewed...
March 27, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28343086/modeling-the-influence-of-acute-changes-in-bladder-elasticity-on-pressure-and-wall-tension-during-filling
#19
Firdaweke G Habteyes, S Omid Komari, Anna S Nagle, Adam P Klausner, Rebecca L Heise, Paul H Ratz, John E Speich
Tension-sensitive nerves in the bladder wall are responsible for providing bladder sensation. Bladder wall tension, and therefore nerve output, is a function of bladder pressure, volume, geometry and material properties. The elastic modulus of the bladder is acutely adjustable, and this material property is responsible for adjustable preload tension exhibited in human and rabbit detrusor muscle strips and dynamic elasticity revealed during comparative-fill urodynamics in humans. A finite deformation model of the bladder was previously used to predict filling pressure and wall tension using uniaxial tension test data and the results showed that wall tension can increase significantly during filling with relatively little pressure change...
February 20, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28332134/clinical-characteristics-of-bladder-cancer-in-patients-with-spinal-cord-injury-the-experience-from-a-single-centre
#20
Ralf Böthig, Ines Kurze, Kai Fiebag, Albert Kaufmann, Wolfgang Schöps, Thura Kadhum, Michael Zellner, Klaus Golka
INTRODUCTION: Life expectancy for people with spinal cord injury has shown a marked increase due to modern advances in treatment methods and in neuro-urology. However, since life expectancy of people with paralysis increases, the risk of developing of urinary bladder cancer is gaining importance. MATERIALS AND METHODS: Single-centre retrospective evaluation of patient data with spinal cord injuries and proven urinary bladder cancer and summary of the literature...
March 22, 2017: International Urology and Nephrology
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