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Geometry of aortic heart valvesPhotogrammetric measurements of the surface topography of the aortic valves obtained from silicon rubber molds of freshly excised human aortic valves are presented. The data are part of an investigation into the design of a new prosthetic valve which will be a central-flow device, like the real valve and unlike previous central-occluding prostheses. Since the maximum stress on the heart valve is induced when the valve is closed and subject to diastolic back-pressure, it was decided to determine the valve geometry during diastole. That is, the molds were formed by pouring the rubber down the excised aortas, causing the valves to close. The molds were made under different pressures (20-120 torr); photogrammetry served as a vehicle for the assessment of the mold topography through the following outputs: digital models, surface profiles, and contour maps.
Document ID
19750052764
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Karara, H. M.
(Illinois, University Urbana, Ill., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1975
Subject Category
Man/System Technology And Life Support
Meeting Information
Meeting: American Society of Photogrammetry, Annual Meeting
Location: Washington, DC
Start Date: March 9, 1975
End Date: March 14, 1975
Accession Number
75A36836
Funding Number(s)
CONTRACT_GRANT: NAS9-12459
Distribution Limits
Public
Copyright
Other

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