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Development of a Gravid Uterus Model for the Study of Road Accidents Involving Pregnant Women
- Source :
- Journal of Biomechanical Engineering. 138
- Publication Year :
- 2015
- Publisher :
- ASME International, 2015.
-
Abstract
- Car accident simulations involving pregnant women are well documented in the literature and suggest that intra-uterine pressure could be responsible for the phenomenon of placental abruption, underlining the need for a realistic amniotic fluid model, including fluid–structure interactions (FSI). This study reports the development and validation of an amniotic fluid model using an Arbitrary Lagrangian Eulerian formulation in the LS-DYNA environment. Dedicated to the study of the mechanisms responsible for fetal injuries resulting from road accidents, the fluid model was validated using dynamic loading tests. Drop tests were performed on a deformable water-filled container at acceleration levels that would be experienced in a gravid uterus during a frontal car collision at 25 kph. During the test device braking phase, container deformation induced by inertial effects and FSI was recorded by kinematic analysis. These tests were then simulated in the LS-DYNA environment to validate a fluid model under dynamic loading, based on the container deformations. Finally, the coupling between the amniotic fluid model and an existing finite-element full-body pregnant woman model was validated in terms of pressure. To do so, experimental test results performed on four postmortem human surrogates (PMHS) (in which a physical gravid uterus model was inserted) were used. The experimental intra-uterine pressure from these tests was compared to intra uterine pressure from a numerical simulation performed under the same loading conditions. Both free fall numerical and experimental responses appear strongly correlated. The relationship between the amniotic fluid model and pregnant woman model provide intra-uterine pressure values correlated with the experimental test responses. The use of an Arbitrary Lagrangian Eulerian formulation allows the analysis of FSI between the amniotic fluid and the gravid uterus during a road accident involving pregnant women.
- Subjects :
- Amniotic fluid
Injury control
Accident prevention
Finite Element Analysis
0206 medical engineering
Biomedical Engineering
Poison control
02 engineering and technology
03 medical and health sciences
0302 clinical medicine
Pregnancy
Physiology (medical)
Humans
Computer Simulation
Simulation
Mechanical Phenomena
Mathematics
030219 obstetrics & reproductive medicine
Uterus
Accidents, Traffic
Gravid uterus
Mechanics
Amniotic Fluid
Arbitrary lagrangian eulerian
020601 biomedical engineering
Finite element method
Biomechanical Phenomena
Female
Subjects
Details
- ISSN :
- 15288951 and 01480731
- Volume :
- 138
- Database :
- OpenAIRE
- Journal :
- Journal of Biomechanical Engineering
- Accession number :
- edsair.doi.dedup.....21d3476ac8414e57db4fffec0715bd54