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Li M, Liu T, Wang B, Qiao P, Wang S. MR defecography in assessing stress urinary incontinence with or without symptomatic pelvic organ prolapse. World J Urol 2024; 42:321. [PMID: 38744781 DOI: 10.1007/s00345-024-05014-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 04/22/2024] [Indexed: 05/16/2024] Open
Abstract
PURPOSE Utilize magnetic resonance defecography (MRD) to analyze the primary pelvic floor dysfunctions in patients with stress urinary incontinence (SUI) associated with pelvic organ prolapse (POP), and in SUI patients with asymptomatic POP. METHOD We performed MRD in both SUI and POP subjects. As a primary analysis, the functional MR parameters were compared between the isolated POP and POP combined SUI groups. As a secondary analysis, the functional MR data were compared between the POP combined SUI and the SUI with asymptomatic POP (isolated SUI) groups. RESULTS MRD noted the main characteristics of SUI combined moderate or severe POP, including the shorter closed urethra length (1.87 cm vs. 2.50 cm, p < 0.001), more prevalent urethral hypermobility (112.31° vs. 85.67°, p = 0.003), bladder neck funneling (48.28% vs. 20.51%, p = 0.020), lower position of vesicourethral junction (2.11 cm vs. 1.67 cm, p = 0.030), and more severe prolapse of the posterior bladder wall (6.26 cm vs. 4.35 cm, p = 0.008). The isolated SUI patients showed the shortest length of the closed urethra (1.56 cm vs. 1.87 cm, p = 0.029), a larger vesicourethral angle (153.80° vs. 107.58°, p < 0.001), the more positive bladder funneling (84.85% vs. 48.28%, p = 0.002) and a special urethral opening sign (45.45% vs. 3.45%, p < 0.001). CONCLUSIONS Patients with SUI accompanying POP primarily exhibit excessive urethral mobility and a shortened urethral closure. SUI patients with asymptomatic POP mainly show dysfunction of the urethra and bladder neck, characterized by the opening of the urethra and bladder neck and a shortened urethral closure.
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Affiliation(s)
- Min Li
- Department of Radiology, Beijing Chao Yang Hospital, Capital Medical University, 8 Workers Stadium South Road, Chaoyang District, Beijing, 10020, China.
| | - Tongtong Liu
- Department of Radiology, Beijing Chao Yang Hospital, Capital Medical University, 8 Workers Stadium South Road, Chaoyang District, Beijing, 10020, China
| | - Biao Wang
- Department of Urology, Beijing Chao Yang Hospital, Capital Medical University, 8 Workers Stadium South Road, Chaoyang District, Beijing, 10020, China
| | - Peng Qiao
- Department of Urology, Beijing Chao Yang Hospital, Capital Medical University, 8 Workers Stadium South Road, Chaoyang District, Beijing, 10020, China
| | - Sumei Wang
- Department of Gynecology, Beijing Chao Yang Hospital, Capital Medical University, 8 Workers Stadium South Road, Chaoyang District, Beijing, 10020, China.
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Guo M, Zbar AP, Wu Y. Imaging the levator ani and the puborectalis muscle: implications in understanding regional anatomy, physiology and pathology. Scand J Gastroenterol 2023; 58:1295-1308. [PMID: 37309141 DOI: 10.1080/00365521.2023.2220458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 05/17/2023] [Accepted: 05/28/2023] [Indexed: 06/14/2023]
Abstract
Purpose:To review the findings of recent dynamic imaging of the levator ani muscle in order to explain its function during defecation. Historical anatomical studies have suggested that the levator ani initiates defecation by lifting the anal canal, with conventional dissections and static radiologic imagery having been equated with manometry and electromyography.Materials and methods:An analysis of the literature was made concerning the chronological development of imaging modalities specifically designed to assess pelvic floor dynamics. Comparisons are made between imaging and electromyographic data at rest and during provocative manoeuvres including squeeze and strain.Results:The puborectalis muscle is shown distinctly separate from the levator ani and the deep external anal sphincter. In contrast to conventional teaching that the levator ani initiates defecation by lifting the anus, dynamic illustration defecography (DID) has confirmed that the abdominal musculature and the diaphragm instigate defecation with the transverse and vertical component portions of the levator ani resulting in descent of the anus. Current imaging has shown a tendinous peripheral structure to the termination of the conjoint longitudinal muscle, clarifying the anatomy of the perianal spaces. Planar oXy defecography has established patterns of movement of the anorectal junction that separate controls from those presenting with descending perineum syndrome or with anismus (paradoxical puborectalis spasm).Conclusions:Dynamic imaging of the pelvic floor (now mostly with MR proctography) has clarified the integral role of the levator ani during defecation. Rather than lifting the rectum, the muscle ensures descent of the anal canal.
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Affiliation(s)
- Maolin Guo
- Department of Radiology, PLA 989 Hospital, Luoyang, P.R. China
| | - Andrew P Zbar
- Department of Neuroscience and Anatomy, University of Melbourne, Melbourne, Australia
| | - Yucen Wu
- Department of Neuroscience and Anatomy, University of Melbourne, Melbourne, Australia
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Yang X, Wang X, Gao Z, Li L, Lin H, Wang H, Zhou H, Tian D, Zhang Q, Shen J. The Anatomical Pathogenesis of Stress Urinary Incontinence in Women. Medicina (B Aires) 2022; 59:medicina59010005. [PMID: 36676629 PMCID: PMC9865065 DOI: 10.3390/medicina59010005] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 12/12/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022] Open
Abstract
Stress urinary incontinence is a common disease in middle-aged and elderly women, which seriously affects the physical and mental health of the patients. For this reason, researchers have carried out a large number of studies on stress urinary incontinence. At present, it is believed that the pathogenesis of the disease is mainly due to changes related to age, childbirth, obesity, constipation and other risk factors that induce changes in the urinary control anatomy, including the anatomical factors of the urethra itself, the anatomical factors around the urethra and the anatomical factors of the pelvic nerve. The combined actions of a variety of factors lead to the occurrence of stress urinary incontinence. This review aims to summarize the anatomical pathogenesis of stress urinary incontinence from the above three perspectives.
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Affiliation(s)
- Xunguo Yang
- The First Department of Urology, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
- Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Xingqi Wang
- The First Department of Urology, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
- Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Zhenhua Gao
- The First Department of Urology, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
- Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Ling Li
- The First Department of Urology, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
- Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Han Lin
- The First Department of Urology, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
- Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Haifeng Wang
- The First Department of Urology, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
- Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Hang Zhou
- The First Department of Urology, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
- Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Daoming Tian
- The First Department of Urology, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
- Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Quan Zhang
- The First Department of Urology, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
- Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
| | - Jihong Shen
- The First Department of Urology, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
- Yunnan Province Clinical Research Center for Chronic Kidney Disease, Kunming 650032, China
- Correspondence: ; Tel.: +86-135-7700-9705
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Hong CX, Sheyn DD, Sammarco AG, DeLancey JO. Geometric analysis of the urethral-vaginal interface curvature in women with and without stress urinary incontinence: A pilot magnetic resonance imaging study. Neurourol Urodyn 2022; 41:340-347. [PMID: 34806771 PMCID: PMC8738156 DOI: 10.1002/nau.24826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/29/2021] [Accepted: 10/16/2021] [Indexed: 01/03/2023]
Abstract
AIMS To evaluate differences in the curvature of the urethral-vaginal interface in women with and without stress urinary incontinence (SUI) using geometric morphometric analysis techniques. METHODS We conducted a pilot case-control study using magnetic resonance imaging (MRI) scans of 18 women with and without SUI. The urethral-vaginal interface at the level of the mid-urethra was fitted with a second-order polynomial regression. The chord length and chord-to-vertex length of the resulting parabolic curve were used to calculate the arc length and radius of a circular arc fitted to the interface curvature. Demographic characteristics and Pelvic Organ Prolapse Quantification (POP-Q) parameters were collected. Subjects were stratified by those with and without SUI, as well as by those with and without anterior wall prolapse beyond 2 cm proximal to the hymen (Aa > -2 cm). RESULTS The radius of the urethral-vaginal interface curvature was not found to be different between subjects with and without SUI (8.8 vs. 9.2 mm, p = 0.53); however, this value was smaller in subjects with Aa > -2 (8.4 vs. 11.9 mm, p = 0.03). The chord length, chord-to-vertex length, and arc length comprising the urethral-vaginal interface curvature were similar between subjects with and without SUI, and between subjects with and without Aa > -2 cm (p > 0.05 for all). CONCLUSIONS In this pilot study population, the radius of the urethral-vaginal interface curvature at the mid-urethra was smaller among women with anterior vaginal wall prolapse beyond 2 cm proximal to the hymen. A difference in the urethral-vaginal interface curvature among women with and without SUI was not found.
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Affiliation(s)
- Christopher X. Hong
- Pennsylvania Hospital, Philadelphia, PA, USA,Pelvic Anatomy Group - Imaging, Society of Gynecologic Surgeons, East Dundee, IL, USA,University of Michigan, Ann Arbor, MI, USA
| | - David D. Sheyn
- Pelvic Anatomy Group - Imaging, Society of Gynecologic Surgeons, East Dundee, IL, USA,University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Anne G. Sammarco
- Pelvic Anatomy Group - Imaging, Society of Gynecologic Surgeons, East Dundee, IL, USA,University Hospitals Cleveland Medical Center, Cleveland, OH, USA,Rush University Medical Center, Chicago, IL, USA
| | - John O. DeLancey
- Pelvic Anatomy Group - Imaging, Society of Gynecologic Surgeons, East Dundee, IL, USA,University of Michigan, Ann Arbor, MI, USA
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The pathophysiology of stress urinary incontinence: a systematic review and meta-analysis. Int Urogynecol J 2021; 32:501-552. [PMID: 33416968 PMCID: PMC8053188 DOI: 10.1007/s00192-020-04622-9] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 11/16/2020] [Indexed: 01/15/2023]
Abstract
Introduction and hypothesis To evaluate the evidence for pathologies underlying stress urinary incontinence (SUI) in women. Methods For the data sources, a structured search of the peer-reviewed literature (English language; 1960–April 2020) was conducted using predefined key terms in PubMed and Embase. Google Scholar was also searched. Peer-reviewed manuscripts that reported on anatomical, physiological or functional differences between females with signs and/or symptoms consistent with SUI and a concurrently recruited control group of continent females without any substantive urogynecological symptoms. Of 4629 publications screened, 84 met the inclusion criteria and were retained, among which 24 were included in meta-analyses. Results Selection bias was moderate to high; < 25% of studies controlled for major confounding variables for SUI (e.g., age, BMI and parity). There was a lack of standardization of methods among studies, and several measurement issues were identified. Results were synthesized qualitatively, and, where possible, random-effects meta-analyses were conducted. Deficits in urethral and bladder neck structure and support, neuromuscular and mechanical function of the striated urethral sphincter (SUS) and levator ani muscles all appear to be associated with SUI. Meta-analyses showed that observed bladder neck dilation and lower functional urethral length, bladder neck support and maximum urethral closure pressures are strong characteristic signs of SUI. Conclusion The pathology of SUI is multifactorial, with strong evidence pointing to bladder neck and urethral incompetence. While there is also evidence of impaired urethral support and levator ani function, standardized approaches to measurement are needed to generate higher levels of evidence.
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Tai JW, Sorkhi SR, Trivedi I, Sakamoto K, Albo M, Bhargava V, Rajasekaran MR. Evaluation of Age- and Radical-Prostatectomy Related Changes in Male Pelvic Floor Anatomy Based on Magnetic Resonance Imaging and 3-Dimensional Reconstruction. World J Mens Health 2020; 39:566-575. [PMID: 32648374 PMCID: PMC8255398 DOI: 10.5534/wjmh.200021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/29/2020] [Accepted: 05/02/2020] [Indexed: 02/06/2023] Open
Abstract
Purpose Puborectalis muscles (PRM) and ischiocavernosus muscles (ICM) play important roles in urinary continence and male erectile functions. Understanding of anatomy and surgical-injury related changes to these muscles is critical to monitor changes in continence or erectile function. Anatomical description of these muscles has undergone revisions because these conclusions were derived from cadavers. Our objectives were to: (i) elucidate male pelvic muscles by in-vivo magnetic resonance imaging (MRI) and 3-dimensional (3-D) reconstruction of these images and (ii) compare PRM and ICM thickness in healthy volunteers and symptomatic patients. Materials and Methods Healthy young male (mean age, 25 years; n=5), older male (age, 65–70 years; n=5), and post-prostatectomy patients with erectile dysfunction and urinary incontinence (age, 65–70 years; n=5) were scanned on a 3T-magnetic resonance scanner. Images were acquired from slices above urinary bladder base to urethra entry into penis. Pelvic bone, bladder/urethra, corpus cavernosum, ICM, PRM, and prostate were segmented. 3-D models of each structure were generated and assembled into composite images, and ICM and PRM thicknesses were calculated. Results We successfully reconstructed 3-D male pelvic floor anatomy including ICM, PRM, bladder, urethra, bulbospongiosus, corpus cavernosa, prostate and bones from the two groups. We documented significant reduction in PRM and ICM thickness in older men. Conclusions This is perhaps the first 3-D reconstruction of male pelvic floor structures based on in-vivo MRI in healthy and symptomatic patients. Observed reduction in PRM and ICM thickness is possibly due to age-related atrophy.
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Affiliation(s)
- Jesse W Tai
- Department of Urology, San Diego VA Healthcare System & University of California, San Diego, CA, USA
| | - Samuel R Sorkhi
- Department of Urology, San Diego VA Healthcare System & University of California, San Diego, CA, USA
| | - Ishika Trivedi
- Department of Urology, San Diego VA Healthcare System & University of California, San Diego, CA, USA
| | - Kyoko Sakamoto
- Department of Urology, San Diego VA Healthcare System & University of California, San Diego, CA, USA
| | - Michael Albo
- Department of Urology, San Diego VA Healthcare System & University of California, San Diego, CA, USA
| | - Valmik Bhargava
- Division of Cardiology, San Diego VA Healthcare System & University of California, San Diego, CA, USA
| | - Mahadevan Raj Rajasekaran
- Department of Urology, San Diego VA Healthcare System & University of California, San Diego, CA, USA.
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Li M, Wang B, Liu X, Qiao P, Jiao W, Jiang T. MR defecography in the assessment of anatomic and functional abnormalities in stress urinary incontinence before and after pelvic reconstruction. Eur J Radiol 2020; 126:108935. [PMID: 32171913 DOI: 10.1016/j.ejrad.2020.108935] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 02/22/2020] [Accepted: 03/03/2020] [Indexed: 02/07/2023]
Abstract
PURPOSE Magnetic resonance defecography (MRD) was used to evaluate anatomic and functional pelvic floor disorders in women with stress urinary incontinence (SUI) before and after midurethral sling (MUS) intervention. METHOD We performed MRD in both SUI patients and continent controls. Static MR was used to describe the anatomic abnormalities in levator ani muscle and periurethral ligaments (PUL). Dynamic MR was used to depict the function of the urethra and pelvic floor. We compared the MRD parameters between the SUI patients and continent controls before surgery. For SUI patients, dynamic MR images evaluated the functional changes of the urethra and pelvic floor after surgery. RESULTS In SUI group, 75.8 % have PUL defects, 65.7 % discontinuity or complete loss of pubococcygeal muscle, as compared to the continent groups (p < 0.01). There was no significant difference between the perimenopausal volunteers and SUI patients in the puborectalis defection (p > 0.05). The dynamic MR showed the urethral hypermobility, functional urethra shortening, bladder neck funneling, urethra opening and cystocele were significantly associated with SUI patients (p < 0.01). Postoperative MR indicated that SUI patients after MUS had a lower risk of bladder funneling and urethral opening at the defection phase (p < 0.01), but no significant difference in urethral hypermobility or pelvic floor prolapse was seen (p>0.05). CONCLUSIONS MRD with high-resolution and defecation phases provides a detailed anatomic and functional evaluation of the pelvic floor in female SUI before and after pelvic reconstruction.
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Affiliation(s)
- Min Li
- Department of Radiology, Beijing Chao Yang Hospital, Capital Medical University, Beijing, 10020, China
| | - Biao Wang
- Departments of Urology, Beijing Chao Yang Hospital, Capital Medical University, Beijing, 10020, China.
| | - Xiao Liu
- Department of Radiology, Beijing Chao Yang Hospital, Capital Medical University, Beijing, 10020, China
| | - Peng Qiao
- Departments of Urology, Beijing Chao Yang Hospital, Capital Medical University, Beijing, 10020, China
| | - Wenjiao Jiao
- Departments of Urology, Beijing Chao Yang Hospital, Capital Medical University, Beijing, 10020, China
| | - Tao Jiang
- Department of Radiology, Beijing Chao Yang Hospital, Capital Medical University, Beijing, 10020, China.
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El Sayed RF. Integrated MR Analytical Approach and Reporting of Pelvic Floor Dysfunction: Current Implications and New Horizons. Radiol Clin North Am 2020; 58:305-327. [PMID: 32044009 DOI: 10.1016/j.rcl.2019.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Reporting MR imaging of pelvic floor dysfunction can be made easy if radiologists understand the aim of each MR sequence and what to report in each set of MR images. For an MR imaging report that is critical in decision making for patient management, it is of paramount importance to the radiologist to know what to look for and where to look for it. This article presents a new term, integrated MR analytical approach. A reporting template is included in which all MR findings are presented in a schematic form that can be easily interpreted by clinicians from different subspecialties.
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Affiliation(s)
- Rania Farouk El Sayed
- Cairo University MRI Pelvic Floor Center of Excellency and Research Lab Unit, Department of Radiology, Cairo University Hospitals, Kasr El Ainy Street, Cairo 11956, Egypt.
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Ostrzenski A. The new etiology and surgical therapy of stress urinary incontinence in women. Eur J Obstet Gynecol Reprod Biol 2019; 245:26-34. [PMID: 31837491 DOI: 10.1016/j.ejogrb.2019.11.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 11/16/2019] [Accepted: 11/20/2019] [Indexed: 11/24/2022]
Abstract
OBJECTIVES To determine the subjective and objective cure rate of a urethral stabilization procedure (USP) for stress urinary incontinence (SUI) in women; to describe this new surgical intervention; to record its potential complications; to establish the SUI etiology. STUDY DESIGN The author conducted a prospective case series study in ambulatory settings and under local anesthesia. Thirty-four consecutive women with uncomplicated SUI subjected to USP, which was performed by reconstructing site-specific defects within the urethral stabilizing mechanism (USM) and using no surgical slings, meshes or absorbable sutures. The paravaginal defect(s) was repaired by transvaginal approach. The endopelvic fascia was sharply separated from the ventral perineal membrane (VPM) just above the anterior urethral meatus. The vestibular bulbs sharply dissected from VPM and advance upwards. The VPM defect(s) reconstructed and vestibular bulbs placed back to the original location. The access to the peri- and the para-urethral region was created by making a lateral vertical incision, aside from the lateral urethral meatus and defects were repaired. The suburethral transverse incision was made beneath the urethral meatus and the stratum-by-stratum surgical dissection conducted until the lateral vaginourethral ligament is visualized bilaterally. The defect(s) within the vaginourethral ligaments was surgically reconstructed, and the vaginal wall repaired. The primary outcome measured subjective and objective cure rates, and the secondary outcome measured the occurrence of potential complications. The five-year postoperative follow-up was conducted. RESULTS Two out of thirty-four patients dropped-out from the study. The USP performed without difficulties, and no severe complication observed. One-subject developed superficial wound separation (3.1 %) and one-subject (3.1 %) developed urinary urge incontinence at the 5-postoperative-year. At 60-month follow-up subjective and objective cure rates were a 92 % and an 88 % respectively. CONCLUSIONS The urethral stabilization procedure yields a high degree of subjective and objective cure rates without severe complications and is a well-tolerated operation by women. The urethral stabilization procedure is a simple, easy to implement, and reproducible method for uncomplicated stress urinary incontinence in women. Site-specific defects within the urethral stabilizing mechanism constitute the etiology of the stress urinary incontinence in women.
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Affiliation(s)
- Adam Ostrzenski
- Institute of Gynecology, Inc., 7001 Central Ave., St. Petersburg, FL, 33710, USA.
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Macura KJ, Thompson RE, Bluemke DA, Genadry R. Magnetic resonance imaging in assessment of stress urinary incontinence in women: Parameters differentiating urethral hypermobility and intrinsic sphincter deficiency. World J Radiol 2015; 7:394-404. [PMID: 26644825 PMCID: PMC4663378 DOI: 10.4329/wjr.v7.i11.394] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 08/22/2015] [Accepted: 09/30/2015] [Indexed: 02/06/2023] Open
Abstract
AIM: To define the magnetic resonance imaging (MRI) parameters differentiating urethral hypermobility (UH) and intrinsic sphincter deficiency (ISD) in women with stress urinary incontinence (SUI).
METHODS: The static and dynamic MR images of 21 patients with SUI were correlated to urodynamic (UD) findings and compared to those of 10 continent controls. For the assessment of the urethra and integrity of the urethral support structures, we applied the high-resolution endocavitary MRI, such as intraurethral MRI, endovaginal or endorectal MRI. For the functional imaging of the urethral support, we performed dynamic MRI with the pelvic phased array coil. We assessed the following MRI parameters in both the patient and the volunteer groups: (1) urethral angle; (2) bladder neck descent; (3) status of the periurethral ligaments, (4) vaginal shape; (5) urethral sphincter integrity, length and muscle thickness at mid urethra; (6) bladder neck funneling; (7) status of the puborectalis muscle; (8) pubo-vaginal distance. UDs parameters were assessed in the patient study group as follows: (1) urethral mobility angle on Q-tip test; (2) Valsalva leak point pressure (VLPP) measured at 250 cc bladder volume; and (3) maximum urethral closure pressure (MUCP). The UH type of SUI was defined with the Q-tip test angle over 30 degrees, and VLPP pressure over 60 cm H2O. The ISD incontinence was defined with MUCP pressure below 20 cm H2O, and VLPP pressure less or equal to 60 cm H2O. We considered the associations between the MRI and clinical data and UDs using a variety of statistical tools to include linear regression, multivariate logistic regression and receiver operating characteristic (ROC) analysis. All statistical analyses were performed using STATA version 9.0 (StataCorp LP, College Station, TX).
RESULTS: In the incontinent group, 52% have history of vaginal delivery trauma as compared to none in control group (P < 0.001). There was no difference between the continent volunteers and incontinent patients in body habitus as assessed by the body mass index. Pubovaginal distance and periurethral ligament disruption are significantly associated with incontinence; periurethral ligament symmetricity reduces the odds of incontinence by 87%. Bladder neck funneling and length of the suprapubic urethral sphincter are significantly associated with the type of incontinence on UDs; funneling reduced the odds of pure UH by almost 95%; increasing suprapubic urethral sphincter length at rest is highly associated with UH. Both MRI variables result in a predictive model for UDs diagnosis (area under the ROC = 0.944).
CONCLUSION: MRI may play an important role in assessing the contribution of hypermobility and sphincteric dysfunction to the SUI in women when considering treatment options.
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Association Between Postoperative Pelvic Anatomic Features on Magnetic Resonance Imaging and Lower Tract Urinary Symptoms After Radical Prostatectomy. Urology 2014; 84:642-9. [DOI: 10.1016/j.urology.2014.04.044] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 04/24/2014] [Accepted: 04/29/2014] [Indexed: 11/17/2022]
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Rajasekaran MR, Sohn D, Salehi M, Bhargava V, Fritsch H, Mittal RK. Role of puborectalis muscle in the genesis of urethral pressure. J Urol 2012; 188:1382-8. [PMID: 22906663 DOI: 10.1016/j.juro.2012.06.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Indexed: 11/28/2022]
Abstract
PURPOSE The internal (smooth muscle) and the external (rhabdosphincter striated muscle) urethral sphincters have important roles in the genesis of urethral closure pressure. The U-shaped pelvic floor puborectalis muscle is important in the closure of anal and vaginal orifices in humans. We defined the contribution of the puborectalis to urethral pressure. MATERIALS AND METHODS A total of 11 female rabbits were anesthetized and prepared to measure urethral, vaginal and anal canal pressure using manometric methods. Pressure was recorded at rest, after administration of pharmacological agents and during electrical stimulation of the puborectalis and rhabdosphincter sphincter muscles. Phenylephrine, sodium nitroprusside (Sigma-Aldrich®) and rocuronium bromide (PharMEDium, Lake Forest, Illinois) were used to define the relative contribution of smooth and striated muscles to urethral pressure. Histology of the pelvic floor hiatus was also studied. RESULTS At rest mean ± SEM maximum urethral pressure was 13 ± 6 mm Hg. Sodium nitroprusside (50 μg/kg) infusion resulted in a 30% to 40% decrease in resting urethral pressure (mean 7.2 ± 0.2 mm Hg). Phenylephrine produced a dose dependent increase in urethral pressure (mean 17 ± 6, 25 ± 5 and 29 ± 6 for 5, 10 and 50 μg/kg intravenously, respectively). Electrical stimulation of the puborectalis muscle induced a stimulus dependent increase in urethral, vaginal and anal canal pressure. On the other hand, rhabdosphincter stimulation induced a stimulus intensity dependent increase in urethral pressure only. The increase in urethral pressure after puborectalis muscle stimulation was more than twofold higher than after rhabdosphincter stimulation. CONCLUSIONS Our data prove that the puborectalis, a component of the pelvic floor muscles, is an important contributor to urethral pressure in the rabbit.
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Affiliation(s)
- M Raj Rajasekaran
- Division of Gastroenterology, Department of Medicine, University of California-San Diego and San Diego Veterans Affairs Healthcare System, San Diego, California 92161, USA
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Farouk El Sayed R. The urogynecological side of pelvic floor MRI: the clinician’s needs and the radiologist’s role. ACTA ACUST UNITED AC 2012; 38:912-29. [DOI: 10.1007/s00261-012-9905-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Pradidarcheep W, Wallner C, Dabhoiwala NF, Lamers WH. Anatomy and histology of the lower urinary tract. Handb Exp Pharmacol 2011:117-148. [PMID: 21290225 DOI: 10.1007/978-3-642-16499-6_7] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The function of the lower urinary tract is basically storage of urine in the bladder and the at-will periodic evacuation of the stored urine. Urinary incontinence is one of the most common lower urinary tract disorders in adults, but especially in the elderly female. The urethra, its sphincters, and the pelvic floor are key structures in the achievement of continence, but their basic anatomy is little known and, to some extent, still incompletely understood. Because questions with respect to continence arise from human morbidity, but are often investigated in rodent animal models, we present findings in human and rodent anatomy and histology. Differences between males and females in the role that the pelvic floor plays in the maintenance of continence are described. Furthermore, we briefly describe the embryologic origin of ureters, bladder, and urethra, because the developmental origin of structures such as the vesicoureteral junction, the bladder trigone, and the penile urethra are often invoked to explain (clinical) observations. As the human pelvic floor has acquired features in evolution that are typical for a species with bipedal movement, we also compare the pelvic floor of humans with that of rodents to better understand the rodent (or any other quadruped, for that matter) as an experimental model species. The general conclusion is that the "Bauplan" is well conserved, even though its common features are sometimes difficult to discern.
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Affiliation(s)
- Wisuit Pradidarcheep
- AMC Liver Center, Academic Medical Center, University of Amsterdam, Meibergdreef 69-71, 1105 BK, Amsterdam, The Netherlands
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15
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Franco GR, de Oliveira E, Baracat EC, Simões MDJ, Sartoria MGF, Girão MJBC, Castro RA. Histomorphometric analysis of a rat bladder after electrical stimulation. Rev Assoc Med Bras (1992) 2011. [DOI: 10.1590/s0104-42302011000100010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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16
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Franco GR, de Oliveira E, Baracat EC, de Jesus Simões M, Ferreira Sartoria MG, Castello Girão MJB, Castro RA. Histomorphometric analysis of a rat bladder after electrical stimulation. Rev Assoc Med Bras (1992) 2011. [DOI: 10.1016/s0104-4230(11)70010-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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17
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Zijta FM, Froeling M, van der Paardt MP, Lakeman MME, Bipat S, van Swijndregt ADM, Strijkers GJ, Nederveen AJ, Stoker J. Feasibility of diffusion tensor imaging (DTI) with fibre tractography of the normal female pelvic floor. Eur Radiol 2011; 21:1243-9. [PMID: 21197534 PMCID: PMC3088829 DOI: 10.1007/s00330-010-2044-8] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Revised: 10/18/2010] [Accepted: 11/03/2010] [Indexed: 01/08/2023]
Abstract
Objectives To prospectively determine the feasibility of diffusion tensor imaging (DTI) with fibre tractography as a tool for the three-dimensional (3D) visualisation of normal pelvic floor anatomy. Methods Five young female nulliparous subjects (mean age 28 ± 3 years) underwent DTI at 3.0T. Two-dimensional diffusion-weighted axial spin-echo echo-planar (SP-EPI) pulse sequence of the pelvic floor was performed, with additional T2-TSE multiplanar sequences for anatomical reference. Fibre tractography for visualisation of predefined pelvic floor and pelvic wall muscles was performed offline by two observers, applying a consensus method. Three eigenvalues (λ1, λ2, λ3), fractional anisotropy (FA) and mean diffusivity (MD) were calculated from the fibre trajectories. Results In all subjects fibre tractography resulted in a satisfactory anatomical representation of the pubovisceral muscle, perineal body, anal - and urethral sphincter complex and internal obturator muscle. Mean FA values ranged from 0.23 ± 0.02 to 0.30 ± 0.04, MD values from 1.30 ± 0.08 to 1.73 ± 0.12 × 10−³ mm²/s. Muscular structures in the superficial layer of the pelvic floor could not be satisfactorily identified. Conclusions This study demonstrates the feasibility of visualising the complex three-dimensional pelvic floor architecture using 3T-DTI with fibre tractography. DTI of the deep female pelvic floor may provide new insights into pelvic floor disorders.
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Affiliation(s)
- F M Zijta
- Department of Radiology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
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Clinical-decision taking in primary pelvic organ prolapse; the effects of diagnostic tests on treatment selection in comparison with a consensus meeting. Int Urogynecol J 2009; 20:711-9. [DOI: 10.1007/s00192-009-0846-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2008] [Accepted: 02/15/2009] [Indexed: 12/20/2022]
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Ultrasonographic and doppler velocimetric evaluation of the levator ani muscle according to the hormonal status. Eur J Obstet Gynecol Reprod Biol 2008; 141:183-5. [DOI: 10.1016/j.ejogrb.2008.06.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2007] [Revised: 04/16/2008] [Accepted: 06/26/2008] [Indexed: 11/24/2022]
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20
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Wallner C, Dabhoiwala NF, DeRuiter MC, Lamers WH. The anatomical components of urinary continence. Eur Urol 2008; 55:932-43. [PMID: 18755535 DOI: 10.1016/j.eururo.2008.08.032] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2008] [Accepted: 08/07/2008] [Indexed: 10/21/2022]
Abstract
BACKGROUND The levator ani muscle (LAM) plays an important role in urinary continence, but the anatomical relationship between this pelvic floor muscle and the external urethral sphincter (EUS) remains incompletely understood. OBJECTIVE To investigate the topographical relationship between the EUS and the LAM. DESIGN, SETTING, AND PARTICIPANTS Serially sectioned and histochemically stained foetal pelves from eleven females and nine males (10-27 wk of gestation) were studied. Three foetal pelves (two female, 12 and 18 wk of gestation; one male, 12 wk of gestation) and three adult pelves (two females, 54 and 85 yr; one male, 75 yr) were stained immunohistochemically for the presence of striated and smooth muscle tissue. Three-dimensional reconstructions were prepared. MEASUREMENTS Anatomy of the LAM and urethral sphincter components was evaluated qualitatively. RESULTS AND LIMITATIONS The EUS has no direct bony attachment. In female foetuses, the inferior part of the EUS is firmly attached to the LAM by a tendinous connection. Contraction of this part of the EUS produces a force on the urethra in a posteroinferior direction. Contraction of the LAM compresses the rectum and moves the rectovaginal complex anteriorly and superiorly towards the urethra in a plane that lies parallel to, but superior of, that of the EUS. Simultaneous contraction of the LAM and EUS causes an anteriorly convex bend in the midurethra, which closes the midurethral lumen. A similar attachment of the EUS to the LAM is absent in the male. Our study is limited due to the absence of young adult study specimens. CONCLUSIONS The EUS in females is anchored to the levator ani muscle via a tendinous connection. Because of this attachment to the LAM, proper function of the EUS is dependent on the integrity of the LAM and its attachment to the pelvic wall.
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Affiliation(s)
- Christian Wallner
- Department of Anatomy, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
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El Sayed RF, El Mashed S, Farag A, Morsy MM, Abdel Azim MS. Pelvic Floor Dysfunction: Assessment with Combined Analysis of Static and Dynamic MR Imaging Findings. Radiology 2008; 248:518-30. [DOI: 10.1148/radiol.2482070974] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Anatomy of the urethral supporting ligaments defined by dissection, histology, and MRI of female cadavers and MRI of healthy nulliparous women. AJR Am J Roentgenol 2007; 189:1145-57. [PMID: 17954653 DOI: 10.2214/ajr.07.2215] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVE There has been no uniformity of opinion concerning the structures supporting the female urethra. Therefore, the aims of this prospective study were to define precisely the female urethral support structures at cadaveric anatomic dissection and histologic examination and to determine which of these structures can be detected on MRI of cadaveric specimens and of healthy volunteers. SUBJECTS AND METHODS Dissection of seven formalin-preserved cadavers (age at death, 25-50 years; no parity history available) was performed by a professor of anatomy to explore the anatomy of the urethral supporting ligaments and was followed by MRI of the cadaveric specimens with ligamentous markers in place and then by histologic analysis of the dissected ligaments. MRI of 17 healthy nulliparous women (age range, 20-35 years; mean age, 25.5 years) was then performed using T2-weighted, dual turbo spin-echo, balanced fast-field echo, and STIR sequences. A standardized grid system that allowed us to record structural observations on sequentially numbered axial MR images was used by a radiologist who then applied a 4-point grading scale to assess ligament visibility. Three authors--one radiologist, one anatomist, and one urologist--then compared the appearance of each ligament seen in a cadaveric specimen with its appearance on MR images of the same cadaver and on MR images of volunteers. RESULTS At cadaveric dissection we identified ventral and dorsal urethral ligaments. The ventral urethral ligaments included the pubourethral ligaments, which were found to consist of three separate components coursing anteroposterior from the bladder neck to the pubic bone; the periurethral ligament; and the paraurethral ligaments. Dorsal to the urethra, a slinglike ligament, which we believe should be named the "suburethral ligament," was identified. This ligament had a distinct plane of cleavage from the anterior vaginal wall. The MRI findings in the volunteers correlated with the MRI and gross anatomic findings in the cadavers. The proximal pubourethral, periurethral, paraurethral, and suburethral ligaments had visibility scores of 3 (moderately visible) or 4 (easily visible) on MRI in 47%, 65%, 47%, and 53% of volunteers, respectively. CONCLUSION Our results present evidence that may help resolve previous controversies regarding the MR appearance of the ventral urethral ligaments and that better define the course of the ligament dorsal to the urethra, the suburethral ligament. We hope that this detailed anatomic information about the structures involved in continence may lead eventually to improvements in the treatments for women with stress urinary incontinence.
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Oliveira E, Castro RA, Takano CC, Bezerra LRPS, Sartori MGF, Lima GR, Baracat EC, Girão MJBC. Ultrasonographic and Doppler velocimetric evaluation of the levator ani muscle in premenopausal women with and without urinary stress incontinence. Eur J Obstet Gynecol Reprod Biol 2007; 133:213-7. [PMID: 16895744 DOI: 10.1016/j.ejogrb.2006.04.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2005] [Accepted: 04/13/2006] [Indexed: 10/24/2022]
Abstract
OBJECTIVES The objective was to evaluate the cross-sectional area (CSA) and the Doppler velocimetric parameters of the levator ani muscle vessels in premenopausal women with and without urinary stress incontinence. STUDY DESIGN Sixty-three premenopausal women constituted three groups: GI (nulliparous), GII (continent multiparous), and GIII (incontinent multiparous). The patients had undergone transperineal ultrasound in which the CSA was measured and Doppler velocimetry was performed. The examination was repeated by a second observer using the same procedure. RESULTS There was a statistically significant correlation between the measurements of the observers I and II regarding all the parameters studied, except for the A/B ratio in GIII. The CSA was significantly greater in GI and GII than in GIII. As far as Doppler velocimetry is concerned there were no differences in the Doppler velocimetric indices among the three groups. Concerning the absent end diastolic shift, it was observed that there was a significantly greater incidence of such findings in GI+GII (continent women) towards GIII (incontinent women). CONCLUSIONS The CSA evaluation and the Doppler velocimetry of the levator ani muscle vessels were highly reproducible. The CSA was higher in continent women and the frequency of the absent end diastolic shift was higher in incontinent women.
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Affiliation(s)
- Emerson Oliveira
- Department of Gynecology, Federal University of São Paulo, São Paulo, Brazil.
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Martin DR, Salman K, Wilmot CC, Galloway NTM. MR imaging evaluation of the pelvic floor for the assessment of vaginal prolapse and urinary incontinence. Magn Reson Imaging Clin N Am 2007; 14:523-35, vi. [PMID: 17433981 DOI: 10.1016/j.mric.2007.01.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Pelvic MR imaging using the combination of motion-insensitive T2-weighted single-shot fast spin echo and high soft tissue resolution standard T2-weighted fast spin echo techniques has helped to identify soft tissue abnormalities that directly correlate with the clinical and intraoperative findings related to pelvic floor prolapse. In particular, the authors have shown that pelvic MR imaging has the ability to identify changes related to uterosacral ligament disruption and to document the corrective changes after surgical repair of this ligament. In the future, pelvic MR imaging is expected to play a progressively larger role in preoperative planning for complex or uncertain cases and for more detailed evaluation of repair in cases that do not show good symptomatic response. Pelvic MR imaging should also help to document and advance knowledge of surgical repair methodology.
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Affiliation(s)
- Diego R Martin
- Department of Radiology, Emory University School of Medicine, Emory University Hospital, Building A, AT622, 1365 Clifton Road, NE, Atlanta, GA 30322, USA.
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Madill SJ, McLean L. A contextual model of pelvic floor muscle defects in female stress urinary incontinence: a rationale for physiotherapy treatment. Ann N Y Acad Sci 2007; 1101:335-60. [PMID: 17332084 DOI: 10.1196/annals.1389.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
On the basis of the current literature, we describe a model of structural defects in stress urinary incontinence (SUI) and how physiotherapy for SUI can affect each component of the model with reference to the relevant anatomy and pathophysiology. This model of SUI involves four primary structural defects: (1) increased tonic stress on the pelvic fascia due to pelvic floor muscle (PFM) tears; (2) fascial tearing due to PFM denervation; (3) fascial weakness resulting from tears; and (4) inefficient PFM contraction due to altered motor control. These four components interact to collectively weaken urethral closure and allow urine leakage under conditions of increased intra-abdominal pressure. Physiotherapy can strengthen the PFM and may improve the efficiency and/or timing of PFM contractions to reduce or eliminate SUI. It is worthwhile for motivated women with SUI to try PFM exercise therapy as a first approach to treatment. Women need to be individually instructed to ensure that they correctly perform PFM contractions and that they can monitor their own performance. Long-term, high-intensity exercise, including home exercise, is necessary to achieve maximum effect. Under these conditions the improvement in urinary continence with PFM exercise can be complete and enduring.
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Affiliation(s)
- Stéphanie J Madill
- School of Rehabilitation Therapy, Queen's University, Kingston, Ontario, Canada
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Daneshgari F, Moore C. Advancing the understanding of pathophysiological rationale for the treatment of stress urinary incontinence in women: the 'trampoline theory'. BJU Int 2006; 98 Suppl 1:8-14; discussion 15-6. [PMID: 16911594 DOI: 10.1111/j.1464-410x.2006.06365.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Firouz Daneshgari
- Center for Female Pelvic Medicine and Reconstructive Surgery, Glickman Urological Institute, the Cleveland Clinic Foundation, Cleveland, OH 44195, USA.
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Boreham MK, Zaretsky MV, Corton MM, Alexander JM, McIntire DD, Twickler DM. Appearance of the levator ani muscle in pregnancy as assessed by 3-D MRI. Am J Obstet Gynecol 2005; 193:2159-64. [PMID: 16325634 DOI: 10.1016/j.ajog.2005.07.094] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2005] [Revised: 07/15/2005] [Accepted: 07/27/2005] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The purpose of this study was to describe levator ani (LA) anatomy in postterm nulliparas using 3-dimensional (3-D) magnetic resonance (MR). STUDY DESIGN Nulliparas (n = 84) with uncomplicated, postterm pregnancies underwent an MR (4 mm slices, 0 gap) of the uterus and pelvis. LA volume and morphometry were assessed using 3-D post-processing software. RESULTS LA insertion into the symphysis was visible in 93%, and the iliococcygeus muscle assumed a convex shape (arch) in the 92% of the 84 women. The LA shape was characterized as "U" in 53% and "V" in 47%. Mean LA volume was 13.5 (3.7) cm3. There was a positive association between LA volume and higher fetal station (P = .02) and increasing BMI (P < .001). However, no relationship between LA volume and station was found after adjusting for BMI. CONCLUSION BMI was correlated with LA volume in postterm nulliparas. LA insertion into the symphysis and the iliococcygeus arch were well-preserved overall and morphometry was variable.
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Affiliation(s)
- Muriel K Boreham
- Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX, USA
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Preoperative and Postoperative Magnetic Resonance Imaging of Female Pelvic Floor Dysfunction: Correlation with Clinical Findings. ACTA ACUST UNITED AC 2005. [DOI: 10.1097/01.jwi.0000201538.37340.95] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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