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Compression under a mechanical counter pressure space suit gloveBackground: Current gas-pressurized space suits are bulky stiff shells severely limiting astronaut function and capability. A mechanical counter pressure (MCP) space suit in the form of a tight elastic garment could dramatically improve extravehicular activity (EVA) dexterity, but also be advantageous in safety, cost, mass and volume. The purpose of this study was to verify that a prototype MCP glove exerts the design compression of 200 mmHg, a pressure similar to the current NASA EVA suit. Methods: Seven male subjects donned a pressure measurement array and MCP glove on the right hand, which was placed into a partial vacuum chamber. Average compression was recorded on the palm, the bottom of the middle finger, the top of the middle finger and the dorsum of the hand at pressures of 760 (ambient), 660 and 580 mmHg. The vacuum chamber was used to simulate the pressure difference between the low breathing pressure of the current NASA space suits (approximately 200 mmHg) and an unprotected hand in space. Results: At ambient conditions, the MCP glove compressed the dorsum of the hand at 203.5 +/- 22.7 mmHg, the bottom of the middle finger at 179.4 +/- 16.0 mmHg, and the top of the middle finger at 183.8 +/- 22.6 mmHg. The palm compression was significantly lower (59.6 +/- 18.8 mmHg, p<0.001). There was no significant change in glove compression with the chamber pressure reductions. Conclusions: The MCP glove compressed the dorsum of the hand and middle finger at the design pressure.
Document ID
20040087466
Document Type
Reprint (Version printed in journal)
Authors
Waldie, James M A. (University of California San Diego, CA 92103, United States)
Tanaka, Kunihiko
Tourbier, Dietmar
Webb, Paul
Jarvis, Christine W.
Hargens, Alan R.
Date Acquired
August 21, 2013
Publication Date
December 1, 2002
Publication Information
Publication: Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology
Volume: 9
Issue: 2
ISSN: 1077-9248
Subject Category
Man/System Technology and Life Support
Funding Number(s)
CONTRACT_GRANT: NAG9-1916
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Life Sciences Technologies
NASA Program Biomedical Research and Countermeasures
Non-NASA Center
NASA Program Advanced Human Support Technology
NASA Discipline Musculoskeletal