| Development of a lower body negative pressure box with an environmental control system for physiological studies. | |
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MedLine Citation:
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PMID: 17281238 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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A headward fluid shift occurs during microgravity exposure, which causes the cardiovascular adaptive syndrome. Different countermeasures have been proposed to decrease its symptomatology, like the application of lower body negative pressure (LBNP). A LBNP box with an environment control system was developed, aiming to improve features of LBNP boxes used worldwide. It consists of five carbon steel ribs in the shape of a cylinder, which is wrapped with high pressure resistant and transparent vinyl. Inner and outer-wheeled trolleys can comfortably and easily move the subject in and out of the box. A custom-made skirt is secured around the subject's waist by an adjustable belt. The other end is secured between two window-type wooden structures, which seal the LBNP box. Inlet and an outlet valves connect the external to the internal environment of the chamber and tube system allows air to circulate gently. Electronic sensors are used to adjust the airflow keeping a pre-set negative pressure without changing humidity and temperature inside the box. Structural, pressure profile and leaking tests were performed with successful results. The improvements of the present LBNP box have substantially decreased the undesirable side effects of uncontrolled environment conditions during rapid pressure changes, and increased test subjects' comfort. |
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Authors:
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T Russomano; F Falcao; J Gurgel; L Piccoli; F Porto; G Dalmarco; D F G de Azevedo; J Allan; L Beck; G Petrat; S Thompsen |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference Volume: 5 ISSN: 1557-170X ISO Abbreviation: Conf Proc IEEE Eng Med Biol Soc Publication Date: 2005 |
Date Detail:
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Created Date: 2007-02-06 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101243413 Medline TA: Conf Proc IEEE Eng Med Biol Soc Country: United States |
Other Details:
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Languages: eng Pagination: 4501-4 Citation Subset: - |
Affiliation:
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Microgravity Laboratory/IPCT-Pontifical Catholic University, Porto Alegre, RS, Brazil. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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