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TECHNICAL PAPERS

Hydraulic Resistance and Permeability in Human Lumbar Vertebral Bodies

[+] Author and Article Information
Ruth S. Ochia

Rush Presbyterian-St. Luke’s Medical Center, Department of Orthopedic Surgery, 2242 W. Harrison, Suite 103, Chicago, IL 60612e-mail: rochia92@yahoo.com

Randal P. Ching

Applied Biomechanics Laboratory, Department of Mechanical Engineering, University of Washington, 501 Eastlake Ave., Suite 102, Seattle, WA 98109e-mail: rc@u.washington.edu

J Biomech Eng 124(5), 533-537 (Sep 30, 2002) (5 pages) doi:10.1115/1.1503793 History: Received February 01, 2001; Revised May 01, 2002; Online September 30, 2002
Copyright © 2002 by ASME
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References

Figures

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Pressure-time histories for specimen 5675 for each of the 4 input velocities: 5, 10, 15, and 20 mm/sec
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Pressure-flow relationship for 10 specimens for 4 different flows: 5.75, 11.48, 17.21, and 22.98 ml/sec
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Pressure history for specimen 5675 at velocity 20 mm/sec overlaid with an exponential curve fit used to determine steady state pressure
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Schematic of resistance to flow apparatus, where MTS is the material testing machine. The specimen is attached to the potting plate with PMMA and the superior surface is exposed to the oil in the piston.
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An example radiograph used to measure vertebral cross-sectional area of vertebral bodies with dime in the center for scaling. Specimens shown are (CW from top) 5178-L5, 5331-L4, 5675-L4, and 5640-L4.

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