Persistent occiput posterior position and stress distribution in levator ani muscle during vaginal delivery computed by a finite element model

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11120%2F20%3A43918437" target="_blank" >RIV/00216208:11120/20:43918437 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11140/20:10395722 RIV/49777513:23520/20:43959628 RIV/49777513:23640/20:43959628 RIV/00669806:_____/20:10395722 RIV/00023698:_____/20:N0000003

Result on the web

<a href="https://doi.org/10.1007/s00192-019-03997-8" target="_blank" >https://doi.org/10.1007/s00192-019-03997-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00192-019-03997-8" target="_blank" >10.1007/s00192-019-03997-8</a>

Result language

angličtina

Original language name

Persistent occiput posterior position and stress distribution in levator ani muscle during vaginal delivery computed by a finite element model

Original language description

Introduction and hypothesis: Objective of this study was to develop an MRI-based finite element model and simulate a childbirth considering the fetal head position in a persistent occiput posterior position. Methods: The model involves the pelvis, fetal head and soft tissues including the levator ani and obturator muscles simulated by the hyperelastic nonlinear Ogden material model. The uniaxial test was measured using pig samples of the levator to determine the material constants. Vaginal deliveries considering two positions of the fetal head were simulated: persistent occiput posterior position and uncomplicated occiput anterior position. The von Mises stress distribution was analyzed. Results: The material constants of the hyperelastic Ogden model were measured for the samples of pig levator ani. The mean values of Ogden parameters were calculated as: μ1 = 8.2 +- 8.9 GPa; μ2 = 21.6 +- 17.3 GPa; α1 = 0.1803 +- 0.1299; α2 = 15.112 +- 3.1704. The results show the significant increase of the von Mises stress in the levator muscle for the case of a persistent occiput posterior position. For the optimal head position, the maximum stress was found in the anteromedial levator portion at station +8 (mean: 44.53 MPa). For the persistent occiput posterior position, the maximum was detected in the distal posteromedial levator portion at station +6 (mean: 120.28 MPa). Conclusions: The fetal head position during vaginal delivery significantly affects the stress distribution in the levator muscle. Considering the persistent occiput posterior position, the stress increases evenly 3.6 times compared with the optimal head position.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

30214 - Obstetrics and gynaecology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Urogynecology Journal

ISSN

0937-3462

e-ISSN

—

Volume of the periodical

31

Issue of the periodical within the volume

7

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

1315-1324

UT code for WoS article

000544356200005

EID of the result in the Scopus database

2-s2.0-85067790578