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Tang L, Liang S, Chen C, Feng J, Chen L, Peng C, Liu P. Comparison of urethral parameters in females presenting cystoceles with and without stress urinary incontinence based on dynamic magnetic resonance imaging: are they different? Abdom Radiol (NY) 2024; 49:2902-2912. [PMID: 38498153 DOI: 10.1007/s00261-023-04175-7] [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: 07/02/2023] [Revised: 12/19/2023] [Accepted: 12/27/2023] [Indexed: 03/20/2024]
Abstract
PURPOSE To compare urethral parameters between cystocele patients with and without stress urinary incontinence (SUI) and explore factors influencing SUI in cystocele patients via dynamic MRI. METHODS The two-dimensional parameters evaluated included the paravaginal defects, levator ani muscle defects, urethral length, urethral funnel shape, bladder neck funnel width, bladder neck funnel depth, urethral angle, posterior vesicourethral angle, and anterior bladder protrusion. The three-dimensional parameters included the proximal urethra rotation angle, the distal urethra rotation angle, bladder neck mobility, urethral midpoint mobility, and external urethral meatus mobility. The independent samples t test was used for continuous variables, and the chi-square test was used for categorical variables. Binary logistic regression was used to identify factors independently associated with SUI in cystocele patients. RESULTS The baseline parameters were similar between the 2 groups. Cystocele patients with SUI had a significantly higher point Aa (1.63 ± 1.06 cm vs. 0.81 ± 1.51 cm, p = 0.008); more anterior bladder protrusion (33.3% vs. 11.4%, p = 0.017); greater bladder neck mobility (36.38 ± 11.46 mm vs. 28.81 ± 11.72 mm, p = 0.005); mid-urethral mobility (22.94 ± 6.50 mm vs. 19.23 ± 6.65 mm, p = 0.014); and external urethral meatus mobility (22.42 ± 8.16 mm vs. 18.03 ± 8.51 mm, p = 0.022) than did cystocele patients without SUI. The other urethral parameters were similar in the groups (p > 0.05). Binary logistic regression showed that bladder neck mobility was independently associated with SUI in females with cystoceles (odds ratio, 1.06; 95% CI 1.015-1.107; p = 0.009). CONCLUSION Cystocele patients with SUI have a higher point Aa, more anterior bladder protrusion, and greater urethral mobility than those without SUI. Bladder neck mobility is independently associated with SUI in females with cystoceles. REGISTRATION NUMBER NCT03146195.
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Affiliation(s)
- Lian Tang
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Department of Obstetrics and Gynecology, NanFang Hospital, Southern Medical University, North of Guangzhou Avenue, No. 1838, Guangzhou, 510515, Guangdong, China
| | - Shiqi Liang
- Department of Obstetrics and Gynecology, NanFang Hospital, Southern Medical University, North of Guangzhou Avenue, No. 1838, Guangzhou, 510515, Guangdong, China
| | - Chunlin Chen
- Department of Obstetrics and Gynecology, NanFang Hospital, Southern Medical University, North of Guangzhou Avenue, No. 1838, Guangzhou, 510515, Guangdong, China
| | - Jie Feng
- Department of Radiology, NanFang Hospital, Southern Medical University, Guangzhou, China
| | - Lan Chen
- Department of Obstetrics and Gynecology, NanFang Hospital, Southern Medical University, North of Guangzhou Avenue, No. 1838, Guangzhou, 510515, Guangdong, China
| | - Cheng Peng
- Department of Obstetrics and Gynecology, NanFang Hospital, Southern Medical University, North of Guangzhou Avenue, No. 1838, Guangzhou, 510515, Guangdong, China
| | - Ping Liu
- Department of Obstetrics and Gynecology, NanFang Hospital, Southern Medical University, North of Guangzhou Avenue, No. 1838, Guangzhou, 510515, Guangdong, China.
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Zhao H, Shen L, Liu Y. Curvilinear relationship was found between visceral adiposity index and stress urinary incontinence among US adult women: A cross-sectional study. Neurourol Urodyn 2024. [PMID: 39086153 DOI: 10.1002/nau.25564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 07/10/2024] [Accepted: 07/15/2024] [Indexed: 08/02/2024]
Abstract
AIMS The purpose of this study was to find out the relation between visceral adipose index (VAI) levels and stress urinary incontinence (SUI) in adult women. METHODS From the National Health and Nutrition Examination Survey (NHANES) 2007-2020, females aged 20 or above were identified for this study. Visceral adiposity was determined using the VAI score, and the assessment of urinary incontinence was carried out through a correlation questionnaire. Logistic regression models and restricted cubic spline (RCS) regression were employed to analyze the relationship between VAI levels and SUI. RESULTS Among the 6522 participants, 2672 (41.0%) were reported SUI. Multivariate logistic regression revealed significantly higher odds of SUI with increasing VAI levels (Q4 vs. Q1), adjusted odds ratio (aOR) = 1.53 (CI: 1.29-1.81, p < 0.001). RCS regression indicated a curvilinear relationship between VAI and SUI (p = 0.003). In threshold analysis, aOR for developing SUI was 1.18 (CI: 1.11-1.26, p < 0.001) for participants with VAI < 4.73, suggesting an 18% increased risk of SUI with each unit increase in VAI. No association between VAI and SUI was observed when VAI was ≥4.73. CONCLUSIONS Our study has revealed a significant curvilinear relationship between VAI and SUI within a large and representative sample of women. Future research is necessary to evaluate the relationship between the two and explicate the underlying mechanisms of this relationship.
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Affiliation(s)
- Haibo Zhao
- Department of Obstetrics and Gynaecology, Changning Maternity and Infant Health Hospital, East China Normal University, Shanghai, China
| | - Liping Shen
- Department of Obstetrics and Gynaecology, Changning Maternity and Infant Health Hospital, East China Normal University, Shanghai, China
| | - Yu Liu
- Department of Obstetrics and Gynaecology, Changning Maternity and Infant Health Hospital, East China Normal University, Shanghai, China
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Shi L, Zhao Y, Li W, Chen L, Shen W, Zhai L. Evaluation of pelvic structural abnormalities in primiparous women with stress urinary incontinence. Int Urogynecol J 2024; 35:369-380. [PMID: 37966496 DOI: 10.1007/s00192-023-05675-2] [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: 07/11/2023] [Accepted: 10/08/2023] [Indexed: 11/16/2023]
Abstract
INTRODUCTION AND HYPOTHESIS The objective was to evaluate the morphological characteristics of pelvic floor structure specific to de novo stress urinary incontinence (SUI) in primiparous women using three-dimensional (3D) reconstruction fusion technology based on static MRI combined with dynamic MRI. METHODS Eighty-one primiparous women after the first vaginal delivery were studied, 40 with SUI and 41 without SUI. 3D reconstruction models based on static MRI were used to describe the anatomical abnormalities of pelvic floor tissues. Dynamic MRI was used to describe segmental activities of the urethra and vagina. The relationship between the morphometry and postpartum SUI was evaluated by logistic regression analysis and receiver operator characteristic curve. RESULTS The differences in the distance from the bladder neck to the pubic symphysis (BSD), the angle between the posterior wall of the urethra and the anterior wall of the vagina, the width of the distal region of the vagina, urethral length, urethral compression muscle volume (CUV), and pubovisceral muscle volume, puborectal muscle volume, were measured, and except for the extremity of the anterior urethral wall, the total displacements (TDs) of the other sites between the two groups were statistically significant (p < 0.05). Logistic regression analysis showed that the BSD decreased, the CUV decreased, the TDs of the first site and the eighth site increment correlated significantly with postpartum SUI occurrence (p < 0.05). CONCLUSIONS 3D reconstruction fusion technology provides an important support for a precise assessment of the pelvic floor dysfunction. The BSD, CUV, and iliococcygeus muscle volume have certain values in predicting de novo SUI after first vaginal birth.
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Affiliation(s)
- Li Shi
- Department of Anatomy and Histology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Yujiao Zhao
- Department of Radiology, Tianjin First Central Hospital, School of Medicine, Nankai University, Fukang Road No. 24, Nankai District, Tianjin, 300192, China
| | - Weijun Li
- Department of Anatomy and Histology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Lihua Chen
- Department of Radiology, Tianjin First Central Hospital, School of Medicine, Nankai University, Fukang Road No. 24, Nankai District, Tianjin, 300192, China
| | - Wen Shen
- Department of Radiology, Tianjin First Central Hospital, School of Medicine, Nankai University, Fukang Road No. 24, Nankai District, Tianjin, 300192, China.
| | - Lidong Zhai
- Department of Anatomy and Histology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China.
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Xiao T, Cao Y, Zhen C, Chen Z, Huang W, Su Z. Nomogram Analysis Based on Clinical and Sonographic Characteristics for the Assessment of Postpartum Stress Urinary Incontinence. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2023; 42:2591-2601. [PMID: 37341131 DOI: 10.1002/jum.16295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 04/06/2023] [Accepted: 06/09/2023] [Indexed: 06/22/2023]
Abstract
OBJECTIVES We aimed to develop and validate a nomogram integrating clinical and sonographic characteristics for the individualized SUI risk evaluation in the early postpartum stage. METHODS This was a prospective cross-sectional study. From June 2020 to September 2022, singleton primiparas who underwent TPUS examination at 6-8 weeks postpartum were recruited. They were divided into the training and validation cohorts at a ratio of 8:2 according to the temporal split. All subjects were interviewed before TPUS examination. Univariate and multivariate logistic analyses were performed to develop three models: the clinical, sonographic, and combined models. The ROC curve was plotted to evaluate model discrimination ability. Finally, the combined model was selected to establish the nomogram. The nomogram's discrimination, calibration, and clinical usefulness were evaluated in the training and validation cohorts. RESULTS The performance of the combined model was better than that of the clinical and sonographic models. Six predictors (BMI, delivery mode, lateral episiotomy, SUI during pregnancy, cystocele, and bladder neck funneling) remained in the combined model. The nomogram based on the combined model had good discrimination with AUCs of 0.848 (95% CI: 0.796-0.900) and 0.872 (95% CI: 0.789-0.955) in the training and validation cohorts, respectively, and the calibration curve showed good efficiency in assessing postpartum SUI. Decision curve analysis showed that the nomogram was clinically useful. CONCLUSIONS The nomogram based on clinical and sonographic characteristics showed good efficiency in assessing postpartum SUI risk and can be a convenient and reliable tool for individual SUI risk assessment.
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Affiliation(s)
- Ting Xiao
- Department of Ultrasound, Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, China
- Department of Ultrasound, The First People's Hospital of Foshan, Foshan, China
| | - Yunqing Cao
- Department of Ultrasound, The First People's Hospital of Foshan, Foshan, China
| | - Chaojiong Zhen
- Department of Ultrasound, The First People's Hospital of Foshan, Foshan, China
| | - Ziman Chen
- Department of Health Technology and Informatics, Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Weijun Huang
- Department of Ultrasound, The First People's Hospital of Foshan, Foshan, China
| | - Zhongzhen Su
- Department of Ultrasound, Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, China
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Jiang C, Zhang S, Chen J, Zhang Y, Cai K, Chen W, Wu Y, Liang C. Significance of 4D US parameters for the clinical treatment of female patients with stress urinary incontinence. Front Surg 2023; 10:1126293. [PMID: 37545841 PMCID: PMC10401039 DOI: 10.3389/fsurg.2023.1126293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 06/19/2023] [Indexed: 08/08/2023] Open
Abstract
Background Stress urinary incontinence (SUI) that has been associated with abnormal pelvic floor muscle function or morphology is a common condition. This research aimed to study the impact of the four-dimensional (4D) pelvic floor ultrasound on the treatment of female patients with clinical diagnosis of SUI and to evaluate its clinical significance on SUI. Methods We enrolled 51 women with SUI. Before transobturator suburethral tape procedures, the patients underwent 4D pelvic floor ultrasonography. The measurements include residual urine volume, bladder detrusor thickness in resting state, the vertical distance from the bladder neck to the posterior inferior edge of pubic symphysis at rest and Valsalva movement, posterior angle of bladder urethra, and urethral rotation angle. The degree of movement of the bladder neck (the difference between the vertical distance from the bladder neck to the posterior inferior edge of the pubic symphysis under the resting state and the maximum Valsalva movement) and the formation of a funnel at the internal orifice of the urethra were calculated. Results The mean bladder detrusor thickness was 2.6 ± 0.9 mm, the vertical distance from the bladder neck to the posterior inferior edge of pubic symphysis was 27.7 ± 4.5 mm, the posterior angle of the bladder was 122.7 ± 18.9°, the vertical distance from the rectal ampulla to the posterior inferior edge of pubic symphysis was 18.5 ± 4.6 mm, and the mean area of hiatus of the levator ani muscle was 22.1 ± 6.0 cm2. The mean posterior angle of the bladder on Valsalva was 159.3 ± 23.1°, and the mean urethral rotation angle was 67.2 ± 21.4°. Conclusions The 4D pelvic floor ultrasound is a reliable method in evaluating preoperational morphological characteristics of patients with SUI. With the help of the 4D pelvic floor ultrasound, the individualized treatment regimen can be developed and, more importantly, the inappropriate surgical decision can be avoided.
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Affiliation(s)
- Changqin Jiang
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
- The Institute of Urology, Anhui Medical University, Hefei, China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei, China
| | - Song Zhang
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
- The Institute of Urology, Anhui Medical University, Hefei, China
| | - Jing Chen
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
- The Institute of Urology, Anhui Medical University, Hefei, China
| | - Yangyang Zhang
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
- The Institute of Urology, Anhui Medical University, Hefei, China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei, China
| | - Keke Cai
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
- The Institute of Urology, Anhui Medical University, Hefei, China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei, China
| | - Wei Chen
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
- The Institute of Urology, Anhui Medical University, Hefei, China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei, China
| | - Yuanyuan Wu
- Department of Ultrasound, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Chaozhao Liang
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
- The Institute of Urology, Anhui Medical University, Hefei, China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei, China
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Doumouchtsis SK, de Tayrac R, Lee J, Daly O, Melendez-Munoz J, Lindo FM, Cross A, White A, Cichowski S, Falconi G, Haylen B. An International Continence Society (ICS)/ International Urogynecological Association (IUGA) joint report on the terminology for the assessment and management of obstetric pelvic floor disorders. Int Urogynecol J 2023; 34:1-42. [PMID: 36443462 PMCID: PMC9834366 DOI: 10.1007/s00192-022-05397-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/20/2022] [Indexed: 11/30/2022]
Abstract
AIMS The terminology of obstetric pelvic floor disorders should be defined and reported as part of a wider clinically oriented consensus. METHODS This Report combines the input of members of two International Organizations, the International Continence Society (ICS) and the International Urogynecological Association (IUGA). The process was supported by external referees. Appropriate clinical categories and a sub-classification were developed to give coding to definitions. An extensive process of 12 main rounds of internal and 2 rounds of external review was involved to exhaustively examine each definition, with decision-making by consensus. RESULTS A terminology report for obstetric pelvic floor disorders, encompassing 357 separate definitions, has been developed. It is clinically-based with the most common diagnoses defined. Clarity and user-friendliness have been key aims to make it usable by different specialty groups and disciplines involved in the study and management of pregnancy, childbirth and female pelvic floor disorders. Clinical assessment, investigations, diagnosis, conservative and surgical treatments are major components. Illustrations have been included to supplement and clarify the text. Emerging concepts, in use in the literature and offering further research potential but requiring further validation, have been included as an Appendix. As with similar reports, interval (5-10 year) review is anticipated to maintain relevance of the document and ensure it remains as widely applicable as possible. CONCLUSION A consensus-based Terminology Report for obstetric pelvic floor disorders has been produced to support clinical practice and research.
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Affiliation(s)
- Stergios K. Doumouchtsis
- grid.419496.7Department of Obstetrics and Gynaecology, Epsom and St. Helier University Hospitals NHS Trust, Epsom, UK
- grid.264200.20000 0000 8546 682XSt. George’s University of London, London, UK
- grid.5216.00000 0001 2155 0800Laboratory of Experimental Surgery and Surgical Research “N.S. Christeas”, National and Kapodistrian University of Athens, Medical School, Athens, Greece
- grid.464520.10000 0004 0614 2595School of Medicine, American University of the Caribbean, Cupecoy, Sint Maarten
- School of Medicine, Ross University, Miramar, FL USA
| | - Renaud de Tayrac
- grid.411165.60000 0004 0593 8241Nimes University Hospital, Nimes, France
| | - Joseph Lee
- grid.1005.40000 0004 4902 0432University New South Wales, Sydney, Australia
| | - Oliver Daly
- grid.417072.70000 0004 0645 2884Western Health, Melbourne, Australia
| | - Joan Melendez-Munoz
- grid.411295.a0000 0001 1837 4818Hospital Universitari Dr. Josep Trueta, Girona, Spain
| | - Fiona M. Lindo
- grid.63368.380000 0004 0445 0041Houston Methodist Hospital, Texas A&M University College of Medicine, Houston Methodist Hospital, Houston, TX USA
| | - Angela Cross
- grid.415534.20000 0004 0372 0644Middlemore Hospital, Auckland, New Zealand
| | - Amanda White
- grid.89336.370000 0004 1936 9924University of Texas at Austin, Austin, TX USA
| | - Sara Cichowski
- grid.5288.70000 0000 9758 5690Oregon Health & Sciences University, Portland, OR USA
| | - Gabriele Falconi
- grid.413009.fComplex Operative Unit of Gynecology, Fondazione Policlinico Tor Vergata University Hospital, Rome, Italy
| | - Bernard Haylen
- grid.1005.40000 0004 4902 0432University New South Wales, Sydney, Australia
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Abstract
This article discusses various pelvic floor ultrasonographic modalities and the clinical applications of ultrasonography of the pelvic floor. Ultrasonography provides a detailed anatomic assessment of the muscles and surrounding organs of the pelvic floor. Different anatomic variabilities and pathologic conditions, such as prolapse, fecal incontinence, urinary symptoms, vaginal wall cysts, synthetic implanted material, and pelvic pain, are assessed with pelvic floor ultrasonography. This imaging modality is an important adjunct to the evaluation and diagnosis of pelvic floor disorders.
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Affiliation(s)
- Trang X Pham
- Female Pelvic Medicine and Reconstructive Surgery, Department of Obstetrics and Gynecology, University of Oklahoma Health Sciences, 800 Stanton L. Young Boulevard, Suite 2400, Oklahoma City, OK 73104, USA
| | - Lieschen H Quiroz
- Female Pelvic Medicine and Reconstructive Surgery, Department of Obstetrics and Gynecology, University of Oklahoma Health Sciences, 800 Stanton L. Young Boulevard, Suite 2400, Oklahoma City, OK 73104, USA.
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Cimsir MT, Yildiz MS. Could the Valsalva manoeuvre be an alternative to the tenaculum for intrauterine device insertion? EUR J CONTRACEP REPR 2021; 26:503-506. [PMID: 34114522 DOI: 10.1080/13625187.2021.1934442] [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: 10/21/2022]
Abstract
OBJECTIVES This study investigated whether the Valsalva manoeuvre (VM) could be an alternative to use of the tenaculum for intrauterine device (IUD) insertion. The aims were to establish whether VM could provide good patient comfort and enable the insertion to be performed successfully with adequate pain control in cases where the cervix could not be passed spontaneously. METHODS Women who attended the outpatient clinic of Alanya Education and Research Hospital between November 2017 and December 2020 for IUD insertion were randomly assigned to the VM (n = 52) or tenaculum (n = 55) group. Insertion in the latter group was carried out by grasping the cervix with a single-toothed tenaculum. In the VM group, no tenaculum was used to grasp the cervix; instead, the woman was asked to perform VM during insertion. RESULTS IUD insertion success rates were similar between the groups. Procedural anxiety scores were slightly higher in the tenaculum group. Pain scores measured during the procedure were significantly higher in the tenaculum group compared with the VM group. Severe pain was reported by 58.2% of women in the tenaculum group, whereas 57.7% of women in the VM group reported no pain. CONCLUSION In cases where an IUD cannot be passed through the cervical canal spontaneously, the procedure should be attempted using VM before using a tenaculum. The use of VM may lead to lower pain and anxiety levels as well as increased patient comfort.
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Affiliation(s)
- Meral Tugba Cimsir
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Alaaddin Keykubat University, Alanya, Turkey
| | - Muhammet Serhat Yildiz
- Department of Obstetrics and Gynaecology, Alanya Education and Research Hospital, Alanya, Turkey
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Pelvic floor function and morphological abnormalities in primiparas with postpartum symptomatic stress urinary incontinence based on the type of delivery: a 1:1 matched case-control study. Int Urogynecol J 2021; 33:245-251. [PMID: 34028579 DOI: 10.1007/s00192-021-04816-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 04/18/2021] [Indexed: 10/21/2022]
Abstract
INTRODUCTION AND HYPOTHESIS The aim of this study was to assess pelvic floor muscle (PFM) morphology and function in primiparas with postpartum symptomatic SUI after different types of delivery. METHODS Retrospective analyses were carried out with individuals with postpartum symptomatic stress urinary incontinence (SUI). Among the women screened in our center from January 2018 to December 2019, participants were divided into elective cesarean section (eCS) and spontaneous vaginal delivery (sVD) groups, while being matched 1:1 on age (±5 years), body mass index (BMI; ±0.5 kg/m2), neonatal birth weight (±300 g), gestational age (±1 week), degree of pelvic organ prolapse quantification (POP-Q), International Consultation on Incontinence Questionnaire-Urinary Incontinence Short Form (ICIQ-UI SF) degree, Incontinence Impact Questionnaire short form (IIQ-7) score, and postpartum days (±10 days); all participants had no sphincter defects or levator ani muscle avulsion. The bioelectrical activity of the PFM was collected using an endovaginal electrode with the Glazer protocol. For the assessment of PFM function, PFM morphometry was evaluated with 3D/4D transperineal ultrasound. RESULTS A total of 78 matched pairs were recruited based on delivery mode. Regarding functional differences, both fast-twitch and slow-twitch fiber strengths in the eCS group were significantly higher than those in the sVD group, but PFMs were more hyperactive in the eCS group. Regarding morphometric differences, the retrovesical angle (RVA) and bladder neck position were not significantly different in the resting state between the two groups, nor was the RVA during the Valsalva maneuver (eCS group: 130.68 ± 17.08°, sVD group: 136.33 ± 23.93°), p > 0.05. There were differences in bladder neck descent (BND; eCS group: 16.51 ± 7.55 mm, sVD group: 23.92 ± 8.47 mm) and urethral rotation angle (URA; eCS group: 37.53 ± 26.05°, sVD group: 59.94 ± 25.87°), all p < 0.05. BND showed a negative correlation with PFM strength, p < 0.05. URAs and RVAs showed no correlation with PFM strength, p > 0.05. CONCLUSION Pelvic floor muscle function disorder, hyperactivity, and instability also occurred after eCS, which resulted in postpartum symptomatic SUI. The effects of sVD compared with eCS on abnormalities in the lower urinary tract were related to bladder neck and urethral hyperactivity, without an RVA increase.
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