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Document ID (ISN)101634
CIS number 03-861
ISSN - Serial title 0095-6562 - Aviation, Space, and Environmental Medicine
Year 2002
Convention or series no.
Author(s) Balldin U.I., Pilmanis A.A., Webb J.T.
Title The effect of simulated weightlessness on hypobaric decompression sickness
Bibliographic information Aug. 2002, Vol.73, No.8, p.773-778. Illus. 29 ref.
Abstract A discrepancy exists between the 20-40% reported incidence of ground-based decompression sickness (DCS) during simulated extravehicular activity at hypobaric space suit pressure, and the zero crewmember reports during actual extravehicular activity. This could be due to the effect of gravity during ground-based DCS studies. 39 male subjects were exposed to a hypobaric pressure of 29.6kPa for up to four hours. 26 controls pre-oxygenated for 60min (first 10min exercising) before being exposed to hypobaric exposure while walking around in the altitude chamber. To simulate weightlessness, the 39 test subjects remained supine for three hours prior to and during the 60-min pre-oxygenation, and at hypobaric pressure. DCS symptoms and gas emboli at hypobaric pressure were registered. No significant difference in incidence of DCS was found between control and simulated weightlessness conditions, while emboli occurred more frequently during the control condition.
Descriptors (primary) decompression sickness; hypobaric facilities; weightlessness
Descriptors (secondary) negative pressure; air embolism; symptoms; space travel; case-control study; oxygen therapy; simulation facilities
Document type D - Periodical articles
Country / State or ProvinceUSA
Subject(s) Occupational pathology
Broad subject area(s) Physical hazards
Browse category(ies) Hyperbaric pressure