EXERCISE DURING DECOMPRESSION REDUCES THE AMOUNT OF VENOUS GAS EMBOLI

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Authors
  1. Jankowski, L.W.
  2. Nishi, R.Y.
  3. Eaton, D.J.
  4. Griffin, A.P.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
To determine the effects of moderate, intermittent exercise during decompression on the Doppler detectable amount of venous gas emboli (VGE), 29 healthy male volunteers performed 44 wet (8 degree + or - 2C) dives to 45 msw (450 kPa) for 30 min with standard air decompression. During compression and the bottom period, all subjects were inactive, during decompression, 28 remained inactive, 11 performed leg exercise, and 5 did arm exercise. Intermittent exercise was controlled at approximately 50% of each subject's arm or leg aerobic capacity. At 30-min intervals after surfacing, subjects were monitored with a Doppler ultrasonic bubble detector. The Doppler scores were used to calculate the Kisman Integrated Severity Score (KISS). The KISS were log transformed (with zeroes being equivalent to log 0.01) and analyzed with a one-way analysis of variance. No significant differences (P less than or equal to 0.5) between mean KISS scores after arm or leg exercise were observed, thus these data were pooled and compared to those of the inactive controls. The mean pooled KISS after exercising during decompression were significantly lower than those of the inactive controls. Moderate, intermittent exercise during decompression apparently reduces the amount of Doppler-detectable VGE after diving. The incidence rate of decompression sickness in both groups was not significantly different (P less than 0.05).
Keywords
Venous gas emboli
Report Number
DCIEM-96-RP-35 — Reprint
Date of publication
01 Jul 1997
Number of Pages
7
Reprinted from
Undersea and Hyperbaric Medical Society Inc, vol 24, no 2, p 59-65
DSTKIM No
97-03935
CANDIS No
504199
Format(s):
Hardcopy;Document Image stored on Optical Disk

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