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TECHNICAL BRIEFS

Measurements of Mouse Pulmonary Artery Biomechanics

[+] Author and Article Information
Naomi C. Chesler

Department of Biomedical Engineering, University of Wisconsin, Madison, WIDepartment of Mechanical Engineering, University of Vermont, Burlington, VT

John Thompson-Figueroa, Ken Millburne

Department of Internal Medicine, University of Vermont, Burlington, VT

J Biomech Eng 126(2), 309-313 (May 04, 2004) (5 pages) doi:10.1115/1.1695578 History: Received May 27, 2003; Revised September 23, 2003; Online May 04, 2004
Copyright © 2004 by ASME
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References

Figures

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Isolated mouse pulmonary artery sutured to glass microcannulas, pre-stretched and pressurized to 5 mmHg. The interrupted white line is the VDA scan-line, which shows the axial position of measurements. The short sections of the scan-line that overlap the vessel wall boundaries are the LWT and RWT measured by analog edge detection. ID is the distance between the inner boundaries of the detected walls (shown in yellow). Scale bar shows 400 μm.
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Representative raw data for OD and Pave versus time during the second cycle of the low pressure cyclic inflation/deflation protocol. Note occasional pressure over/undershoots during step changes, and some creep and creep recovery during inflation and deflation, respectively.
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Outer diameter versus pressure for (a) low and (b) high pressure inflation (gray boxes) and deflation (open triangles) of isolated left main pulmonary arteries. Values are mean ±SD(−SD for inflation, +SD for deflation).
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(a) Cauchy stress and (b) Hudetz’s incremental elastic modulus versus Almansi strain during inflation for low pressure (gray boxes) and high pressure (black boxes) testing protocols. Values are mean ±SD, with Einc values on a log scale.
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Representative mouse pulmonary artery in cross-section stained with hematoxylin and eosin. Intact medial smooth muscle cells (SMC) and adventitial cells are visible; a few intact endothelial cells (EC) are visible.

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