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Detrusor muscle

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https://www.readbyqxmd.com/read/28419532/electromyography-in-the-assessment-and-therapy-of-lower-urinary-tract-dysfunction-in-adults
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
https://www.readbyqxmd.com/read/28294142/inosine-attenuates-spontaneous-activity-in-the-rat-neurogenic-bladder-through-an-a2b-pathway
#15
Claire Doyle, Vivian Cristofaro, Bryan S Sack, Stefan N Lukianov, Mattias Schäfer, Yeun Goo Chung, Maryrose P Sullivan, Rosalyn M Adam
Neurogenic detrusor overactivity (NDO) is among the most challenging complications of spinal cord injury (SCI). A recent report by us demonstrated an improvement in NDO in SCI rats following chronic systemic treatment with the purine nucleoside inosine. The objective of this study was to investigate the mechanism of action of inosine underlying improvement of NDO. Male Sprague-Dawley rats underwent complete spinal cord transection at T8. Inosine (1 mM) delivered intravesically to SCI rats during conscious cystometry significantly decreased the frequency of spontaneous non-voiding contractions...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28293750/factors-affecting-the-surgical-outcomes-of-tethered-cord-syndrome-in-adults-a-retrospective-study
#16
Anas Abdallah, Erhan Emel, Betül Güler Abdallah, Murad Asiltürk, Özden Erhan Sofuoğlu
This study aimed to find the factors that may affect the surgical outcomes of congenital tethered cord syndrome (TCS) in adults by evaluating the long-term surgical outcomes of 25 consecutive cases. Medical records of 79 TCS cases which underwent surgery in Bakırköy Research and Training Hospital for Neurology, Neurosurgery and Psychiatry (BRSHH), during an 11-year period from 2005 to 2015, were retrospectively reviewed. All adult cases (patient age > 18 years) were selected as the core sample used for this study...
March 14, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28254749/expression-and-localization-of-pannexin-1-and-calhm1-in-porcine-bladder-and-their-involvement-in-modulating-atp-release
#17
Hafiz Sana-Ur-Rehman, Irit Markus, Kate Hilda Moore, Kylie Jan Mansfield, Lu Liu
ATP release from urinary bladder is vital for afferent signaling. The aims of this study were to localize CALHM1 and pannexin-1 expression and to determine their involvement in mediating ATP release in the bladder. Gene expression by PCR and immunohistochemistry were performed in the porcine bladder. CALHM1 and pannexin-1 mediated ATP release in response to hypotonic solution (0.45% NaCl) induced stretch and extracellular Ca(2+) depletion ([Ca(2+)]0) was measured in isolated urothelial, suburothelial and detrusor muscle cells...
March 2, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28221218/underactive-bladder-detrusor-underactivity-definition-symptoms-epidemiology-etiopathogenesis-and-risk-factors
#18
Reem Aldamanhori, Christopher R Chapple
PURPOSE OF REVIEW: Lower urinary tract symptoms are bothersome and significantly impair patient's quality of life. Incomplete bladder emptying affects both men and women, and has shown to increase in incidence with aging. Incomplete bladder emptying is consequent upon an inability of the detrusor muscle to adequately contract to completely empty the bladder, with or without an increased bladder outlet resistance; this can be defined urodynamically as detrusor underactivity (DUA). The symptom complex consequent upon DUA is referred to as underactive bladder (UAB)...
May 2017: Current Opinion in Urology
https://www.readbyqxmd.com/read/28194441/deletion-of-neuropilin-2-enhances-detrusor-contractility-following-bladder-outlet-obstruction
#19
Evalynn Vasquez, Vivian Cristofaro, Stefan Lukianov, Fiona C Burkhard, Ali Hashemi Gheinani, Katia Monastyrskaya, Diane R Bielenberg, Maryrose P Sullivan, Rosalyn M Adam
Chronic urethral obstruction and the ensuing bladder wall remodeling can lead to diminished bladder smooth muscle (BSM) contractility and debilitating lower urinary tract symptoms. No effective pharmacotherapy exists to restore BSM contractile function. Neuropilin 2 (Nrp2) is a transmembrane protein that is highly expressed in BSM. Nrp2 deletion in mice leads to increased BSM contraction. We determined whether genetic ablation of Nrp2 could restore BSM contractility following obstruction. Partial bladder outlet obstruction (pBOO) was created by urethral occlusion in mice with either constitutive and ubiquitous, or inducible smooth muscle-specific deletion of Nrp2, and Nrp2-intact littermates...
February 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28166087/genitourinary-malformations-an-under-recognized-feature-of-ectrodactyly-ectodermal-dysplasia-and-cleft-lip-palate-syndrome
#20
Zerin Hyder, Victoria Beale, Ruth O'Connor, Jill Clayton-Smith
The ectodermal dysplasia and cleft lip/palate (EEC) syndrome describes the association of ectrodactyly, ectodermal dysplasia and orofacial clefting. As with many autosomal dominant disorders, there is variability in expression and not all of these three core features are present in every individual with the condition. Moreover, there may be additional associated features, which are under-recognized. One of these is the presence of genitourinary anomalies, some of which cause significant morbidity. This report details a further two patients with EEC syndrome and genitourinary involvement, including flaccid megacystis with detrusor muscle failure, bilateral hydronephrosis and megaureter, requiring significant renal and urological involvement during their childhood...
April 2017: Clinical Dysmorphology
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