Prediction Index of Levator Ani Muscle Avulsion After Vaginal Delivery: An Evidence-Based Appraisal

2018 ◽  
Vol 24 (8) ◽  
pp. 6214-6217
Author(s):  
Budi Iman Santoso ◽  
Adly Nanda Al-Fattah ◽  
Raymond Surya ◽  
Surrahman Hakim
Keyword(s):  
Pelvic Floor ◽  
Vaginal Delivery ◽  
Pelvic Floor Dysfunction ◽  
Levator Ani ◽  
Influential Factors ◽  
Cochrane Library ◽  
Levator Ani Muscle ◽  
Second Stage Of Labor ◽  
Second Stage ◽  
Levator Ani Muscle Avulsion

Pelvic floor dysfunction (PFD) due to vaginal delivery is related to tear of levator ani muscle (LAM) that potentially lead to the impairment of quality of life among women. A number of attempts to predict LAM injury after vaginal delivery had been conducted. This study aims to appraise the accuracy of several prediction index determining LAM injury after vaginal delivery. We conducted a search in Cochrane Library®, Pubmed®, and Medline® with the keywords of “pelvic floor dysfunction” AND “vaginal delivery” AND “prediction.” Critical appraisal determining the validity, importance, and applicability (VIA) was conducted by 2 independent authors. After 6 weeks to 3 months’ duration of follow up, the incidence of LAM avulsion was varied from 15.4% to 35.6% from three studies. Multivariate analysis showed that forceps delivery, OASIS, and active second stage (OR 3.8; 3.1; 1.61; respectively) as the most influential factors for LAM incidence. Maternal age and time spent in active pushing were also contributed to LAM incidence. OASIS and second stage of labor could be used as the most influential components of prediction index for LAM incidence. Prediction indexes for LAM incidence are developed. OASIS and second stage of labor are acknowledged as two most influential variables among three appraised studies.

Effects of Nonlinear Muscle Elasticity on Pelvic Floor Mechanics During Vaginal Childbirth

2010 ◽  
Vol 132 (11) ◽  
Author(s):  
Xinshan Li ◽  
Jennifer A. Kruger ◽  
Martyn P. Nash ◽  
Poul M. F. Nielsen
Keyword(s):  
Experimental Data ◽  
Pelvic Floor ◽  
Vaginal Delivery ◽  
Pelvic Floor Dysfunction ◽  
Levator Ani ◽  
Head Model ◽  
Levator Ani Muscle ◽  
Fetal Head ◽  
Second Stage Of Labor ◽  
Second Stage

The role of the pelvic floor soft tissues during the second stage of labor, particularly the levator ani muscle, has attracted much interest recently. It has been postulated that the passage of the fetal head through the pelvis may cause excessive stretching of the levator ani muscle, which may lead to pelvic floor dysfunction and pelvic organ prolapse later in life. In order to study the complex biomechanical interactions between the levator ani muscle and the fetal head during the second stage of labor, finite element models have been developed for quantitative analysis of this process. In this study we have simulated vaginal delivery using individual-specific anatomical computer models of the pelvic floor interacting with a fetal head model with minimal restrictions placed upon its motion. Two constitutive relations were considered for the levator ani muscle (of exponential and neo-Hookean forms). For comparison purposes, the exponential relation was chosen to exhibit much greater stiffening at higher strains beyond the range of the experimental data. We demonstrated that increased nonlinearity in the elastic response of the tissues leads to considerably higher (56%) estimated force required for delivery, accompanied by a more homogeneous spatial distribution of maximum principal stretch ratio across the muscle. These results indicate that the form of constitutive relation beyond the presently available experimental data markedly affects the estimated function of the levator ani muscle during vaginal delivery, due to the large strains that occur. Further experimental data at higher strains are necessary in order to more reliably characterize the constitutive behavior required for modeling vaginal childbirth.

scholarly journals A Simulation Analysis of Maternal Pelvic Floor Muscle

2021 ◽  
Vol 18 (20) ◽  
pp. 10821
Author(s):  
Rongrong Xuan ◽  
Mingshuwen Yang ◽  
Yajie Gao ◽  
Shuaijun Ren ◽  
Jialin Li ◽  
...  
Keyword(s):  
Pelvic Floor ◽  
Pelvic Floor Muscle ◽  
Levator Ani ◽  
Stress And Strain ◽  
Delivery Mode ◽  
Levator Ani Muscle ◽  
Pelvic Mri ◽  
Second Stage Of Labor ◽  
Attachment Point ◽  
Second Stage

Pelvic floor disorder (PFD) is a common disease affecting the quality of life of middle-aged and elderly women. Pelvic floor muscle (PFM) damage is related to delivery mode, fetal size, and parity. Spontaneous vaginal delivery causes especially great damage to PFM. The purpose of this study was to summarize the characteristics of PFM action during the second stage of labor by collecting female pelvic MRI (magnetic resonance imaging) data and, further, to try to investigate the potential pathogenetic mechanism of PFD. A three-dimensional model was established to study the influence factors and characteristics of PFM strength. In the second stage of labor, the mechanical responses, possible damage, and the key parts of postpartum lesions of PFM due to the different fetal biparietal diameter (BPD) sizes were analyzed by finite element simulations. The research results showed that the peak stress and strain of PFM appeared at one-half of the delivery period and at the attachment point of the pubococcygeus to the skeleton. In addition, during the simulation process, the pubococcygeus was stretched by about 1.2 times and the levator ani muscle was stretched by more than two-fold. There was also greater stress and strain in the middle area of the levator ani muscle and pubococcygeus. According to the statistics, either being too young or in old maternal age will increase the probability of postpartum PFM injury. During delivery, the entire PFM underwent the huge deformation, in which the levator ani muscle and the pubococcygeus were seriously stretched and the attachment point between the pubococcygeus and the skeleton were the places with the highest probability of postpartum lesions.

scholarly journals MRI comparative study of levator ani muscle changes in nulliparous and multiparous females

2019 ◽  
Vol 50 (1) ◽  
Author(s):  
Heba Azzam ◽  
Manal Halim ◽  
Hany El-Assaly ◽  
Aya Heiba
Keyword(s):  
Pelvic Floor ◽  
Treatment Plan ◽  
Pelvic Floor Dysfunction ◽  
Levator Ani ◽  
Control Group ◽  
Puborectalis Muscle ◽  
Levator Ani Muscle ◽  
Vaginal Deliveries ◽  
Significant Difference ◽  
Muscle Changes

Abstract Background Pelvic floor dysfunction is known to be among the principal factors influencing public health, regarding frequency, cost and effect on women’s quality of life. Radiographic assessment of the pelvic floor function and anatomy plays a vital role in the recognition of pelvic floor defects. The aim of this study is to detect the postpartum-related levator ani muscle changes thus defining the relationship between the vaginal deliveries and the etiology of pelvic floor dysfunction in order to provide guidelines to decrease the incidence of pelvic floor injuries during parturition and guide the treatment plan. Results There was a significant difference in the puborectalis muscle thickness between the case and control groups in the right puborectalis (P value ≤ 0.001) and in the left puborectalis (P value (≤ 0.001) as well as significant midpoint thickness (P value = 0.03) with 46.2% puborectalis muscle injury in the case group compared with none in the control group. Conclusion Pelvic floor MRI is highly recommended as it is a contrast-free modality that allows for both anatomical and functional analysis. Its incorporation in the routine postpartum assessment will allow early detection of abnormalities even in asymptomatic cases thus ensuring proper management and preventing the development of pelvic floor dysfunction predisposed to by repeated vaginal deliveries.

scholarly journals P14.16: Prolonged second stage of labor and levator ani muscle injuries

2013 ◽  
Vol 42 (s1) ◽  
pp. 168-168
Author(s):  
V. Marsoosi ◽  
S. Aboutorabi ◽  
L. Eslamian ◽  
A. Jamal
Keyword(s):  
Levator Ani ◽  
Levator Ani Muscle ◽  
Muscle Injuries ◽  
Second Stage Of Labor ◽  
Second Stage

Recovery from pelvic floor dysfunction symptoms in the postpartum is associated with the duration of the second stage of labor

2019 ◽  
Vol 300 (1) ◽  
pp. 127-133
Author(s):  
Ella Pardo ◽  
Reut Rotem ◽  
Hannah Glinter ◽  
Miriam Erenberg ◽  
Lior Yahav ◽  
...  
Keyword(s):  
Pelvic Floor ◽  
Pelvic Floor Dysfunction ◽  
Second Stage Of Labor ◽  
Second Stage
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