Shear Wave Sonoelastography for Elasticity Measurement of the Levator Ani Muscle: An Alternative Posterior Approach

2020 ◽  
Author(s):  
Ke‐Vin Chang ◽  
Wei‐Ting Wu ◽  
Po‐Cheng Hsu
Keyword(s):  
Shear Wave ◽  
Posterior Approach ◽  
Levator Ani ◽  
Levator Ani Muscle ◽  
Elasticity Measurement

scholarly journals Transperineal ultrasound shear-wave elastography is a reliable tool for assessment of the elastic properties of the levator ani muscle in women

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Bertrand Gachon ◽  
Xavier Fritel ◽  
Fabrice Pierre ◽  
Antoine Nordez
Keyword(s):  
Shear Wave ◽  
Elastic Properties ◽  
Valsalva Maneuver ◽  
Intraclass Correlation ◽  
Shear Wave Elastography ◽  
Levator Ani ◽  
Transperineal Ultrasound ◽  
Levator Ani Muscle ◽  
Reliable Tool ◽  
The Mean

AbstractOur main objective was to assess the intraoperator intersession reproducibility of transperineal ultrasound Shear Wave Elastography (SWE) to measure the levator ani muscle (LAM) elastic properties. Secondary objective was to compare reproducibility when considering the mean of three consecutives measurements versus one. In this prospective study involving non-pregnant nulliparous women, two visits were planned, with a measurement of the shear modulus (SM) on the right LAM at rest, during Valsalva maneuver and maximal contraction. Assessments were done with a transperineal approach, using an AIXPLORER device with a linear SL 18–5 (5-18 MHz) probe. For each condition, 3 consecutive measures were performed at each visit. The mean of the three measures, then the first one, were considered for the reproducibility by calculating intraclass correlation coefficient (ICC), and coefficient of variation (CV). Twenty women were included. Reproducibility was excellent when considering the mean of the 3 measures at rest (ICC = 0.90; CV = 15.7%) and Valsalva maneuver (ICC = 0.94; CV = 10.6%), or the first of the three measures at rest (ICC = 0.87; CV = 18.6%) and Valsalva maneuver (ICC = 0.84; CV = 19.9%). Reproducibility was fair for measurement during contraction. Transperineal ultrasound SWE is a reliable tool to investigate LAM elastic properties at rest and during Valsalva maneuver.

Quantifying Levator Ani Muscle Elasticity Under Normal and Prolapse Conditions by Shear Wave Elastography

2020 ◽  
Vol 39 (7) ◽  
pp. 1379-1388 ◽  
Author(s):  
Jin‐hua Tang ◽  
Chen Zhong ◽  
Wei Wen ◽  
Rong Wu ◽  
Yang Liu ◽  
...  
Keyword(s):  
Shear Wave ◽  
Shear Wave Elastography ◽  
Levator Ani ◽  
Levator Ani Muscle ◽  
Muscle Elasticity

scholarly journals Animal models for pelvic organ prolapse: systematic review

2021 ◽  
Author(s):  
Marina Gabriela M. C. Mori da Cunha ◽  
Katerina Mackova ◽  
Lucie Hajkova Hympanova ◽  
Maria Augusta T. Bortolini ◽  
Jan Deprest
Keyword(s):  
Pelvic Organ Prolapse ◽  
Animal Models ◽  
Vaginal Delivery ◽  
Structural Changes ◽  
Meta Analysis ◽  
Levator Ani ◽  
Complete Recovery ◽  
Pelvic Organ ◽  
Squirrel Monkeys ◽  
Levator Ani Muscle

Abstract Introduction and hypothesis We aimed to summarize the knowledge on the pathogenesis of pelvic organ prolapse (POP) generated in animal models. Methods We searched MEDLINE, Embase, Cochrane and the Web of Science to establish what animal models are used in the study of suggested risk factors for the development of POP, including pregnancy, labor, delivery, parity, aging and menopause. Lack of methodologic uniformity precluded meta-analysis; hence, results are presented as a narrative review. Results A total of 7426 studies were identified, of which 51 were included in the analysis. Pregnancy has a measurable and consistent effect across species. In rats, simulated vaginal delivery induces structural changes in the pelvic floor, without complete recovery of the vaginal muscular layer and its microvasculature, though it does not induce POP. In sheep, first vaginal delivery has a measurable effect on vaginal compliance; measured effects of additional deliveries are inconsistent. Squirrel monkeys can develop POP. Denervation of their levator ani muscle facilitates this process in animals that delivered vaginally. The models used do not develop spontaneous menopause, so it is induced by ovariectomy. Effects of menopause depend on the age at ovariectomy and the interval to measurement. In several species menopause is associated with an increase in collagen content in the longer term. In rodents there were no measurable effects of age apart of elastin changes. We found no usable data for other species. Conclusion In several species there are measurable effects of pregnancy, delivery and iatrogenic menopause. Squirrel monkeys can develop spontaneous prolapse.

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