Actions for The development of an elastic reverse gradient garment to be used as a countermeasure for cardiovascular deconditioning

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The development of an elastic reverse gradient garment to be used as a countermeasure for cardiovascular deconditioning

Author
Webb, P.
Published
Dec 14, 1973.
Physical Description
1 electronic document
Additional Creators
Annis, J. F.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
Using a new Nomex-Lycra elastic fabric and individualized garment engineering techniques, reverse gradient garments (RGG's) were designed, constructed, and tested for effectiveness as a countermeasure against cardiovascular deconditioning. By combining torso-compensated positive pressure breathing with a distally diminishing gradient of counterpressure supplied by the elastic fabric on the limbs, the RGG acts to pool blood in the extremities of recumbent persons much as though they were standing erect in 1 g. It was theorized that through the use of a dynamic pressurization scheme, the RGG would stress the vasculature in a fashion similar to that experienced by the noramlly active man, hence preventing or limiting the development of post-weightlessness orthostatic intolerance and related conditions. Four male, college-age subjects received daily treatments with the RGG during a 15-day bedrest study. Four additional subjects also underwent the bedrest, but received no treatments; they served as controls. The design and construction of the garments are described, and results of the treatment related measurements are given.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19740004671.
Accession ID: 74N12784.
NASA-CR-114685.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15746556