Skip to main content
padlock icon - secure page this page is secure

Time and Temperature Effects on Body Fluid Loss During Dives with the Open Hot-Water Suit

Buy Article:

$27.00 + tax (Refund Policy)

Hope A, Hjelle J, Aanderud L, Aakvaag A. Time and temperature effects on body fluid loss during dives with the open hot-water suit. Aviat Space Environ Med 2005; 76:655–660.

Background: Bodyweight (BW) losses up to 5 kg have been observed during diving with the open hot-water suit (HWS). The objective of these dives was to study the hormonal, hematological, and renal effects of dehydration during shallow HWS diving. Methods: In series 1, four divers dove for 3.5 h each day for 7 d. In series 2, 12 divers dove to 6–8 msw for 1, 2, and 4 h. Blood and urine samples, BW measurements, oral temperature, and thermal stress indices were collected. Results: Average ΔBW (± SD) for the 28 dives in series 1 was 1.5 ± 0.8 kg, and the largest BW reductions were 3.2 and 3.0 kg, corresponding to 3.7 and 4.7% of BW. Changes in thermal stress, hemoglobin, hematocrit, aldosterone, and electrolyte excretion correlated with BW reduction. In series 2, average BW reductions were 0.46 ± 0.27, 0.96 ± 0.38, and 1.55 ± 0.59 kg during 1-, 2-, and 4-h dives. BW reduction correlated significantly with thermal stress (p < 0.01). Aldosterone increased after 1 and 2 h and plasma renin activity was unchanged. Atrial natriuretic peptide increased in all dives (p < 0.01) and arginine vasopressin increased in the 4-h dives (p < 0.05). The 7.2% decrease in plasma volume, the increases in hemoglobin, hematocrit and serum proteins, and an unchanged plasma osmolality indicate an isotonic dehydration after the 4-h dives. Conclusions: BW loss during HWS diving is mainly caused by sweating. Dives of 4 h produce an isotonic dehydration and a break for fluid intake is, therefore, recommended.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: aldosterone; arginine vasopressin; atrial natriuretic peptide; hemoglobin; immersion; osmolality; plasma volume

Document Type: Research Article

Publication date: July 1, 2005

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more