Mechanical and Microstructural Investigation of the Cyclic Behavior of Human Amnion

被引：29

作者：

Perrini, Michela ^{[1
,2
,3
]}

Mauri, Arabella ^{[1
,3
]}

Ehret, Alexander Edmund ^{[1
,3
]}

Ochsenbein-Koelble, Nicole ^{[2
,4
]}

Zimmermann, Roland ^{[2
,4
]}

Ehrbar, Martin ^{[2
,4
]}

Mazza, Edoardo ^{[1
,3
,5
]}

机构：

[1] Swiss Fed Inst Technol, Dept Mech & Proc Engn, CH-8092 Zurich, Switzerland

[2] Univ Zurich Hosp, Dept Obstet, CH-8091 Zurich, Switzerland

[3] Inst Mech Syst, CH-8092 Zurich, Switzerland

[4] Dept Obstet, CH-8091 Zurich, Switzerland

[5] EMPA, Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland

来源：

JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME | 2015年 / 137卷 / 06期

基金：

瑞士国家科学基金会;

关键词：

HUMAN FETAL MEMBRANES; CHORIOAMNIOTIC MEMBRANES; PHYSICAL-PROPERTIES; ALTERED MORPHOLOGY; PREMATURE RUPTURE; DEFORMATION; LABOR; WATER; DYNAMICS; FAILURE;

D O I：

10.1115/1.4030054

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

The structural and mechanical integrity of amnion is essential to prevent preterm premature rupture (PPROM) of the fetal membrane. In this study, the mechanical response of human amnion to repeated loading and the microstructural mechanisms determining its behavior were investigated. Inflation and uniaxial cyclic tests were combined with corresponding in situ experiments in a multiphoton microscope (MPM). Fresh unfixed amnion was imaged during loading and changes in thickness and collagen orientation were quantified. Mechanical and in situ experiments revealed differences between the investigated configurations in the deformation and microstructural mechanisms. Repeated inflation induces a significant but reversible volume change and is characterized by high energy dissipation. Under uniaxial tension, volume reduction is associated with low energy, unrecoverable in-plane fiber reorientation.

引用

页数：10

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