Microgravity induced fluid and electrolyte balance changesThe effect of reduced gravity on the fluid and electrolyte balance in astronauts is discussed. The acquired data indicate an early and marked sodium and potassium loss and a negative water balance. The conditions in astronauts may be likened to the syndrome of inappropriate secretion of antidiuretic hormone, but the mechanisms by which weightlessness causes a continued negative water and electrolyte balance, after the early shifts have occurred, are not clear. It is suggested that a transient increase in the release of the atrial naturetic factor and the altered gastrointestinal function may play a role in the initial and continued fluid and electrolyte changes, respectively.
Document ID
19870051520
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Phillips, R. W. (NASA Johnson Space Center Houston, TX; Colorado State University, Fort Collins, United States)