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is this the research that was done in hawaii over the past three years, is so they also found out that if the victum was not back in the water within SEVEN minutes there were permanet deficits.. which means that if you are not trained in inwater recompression and set up to do so you better start thinking about it. dp On Thu, 21 Dec 1995 BrianE@an*.an*.ui*.ed* wrote: > OK, so everyone (everyone that's fit anyway) alwyas says that if you're fit, > there's less chance of DCI, right? Well, actually they are right. The latest > info from the Naval Medical Research Institure (that's in the US) suggests that > pigs conditioned on a treadmill were less likely to have DCI that non- > conditioned pigs. The pigs were compressed in a chamber on air to 200 FSW for > 24 min and then decompressed at 60 ft/min. 73.5% of the non-conditioned pigs > compaired to 41.7% of conditioned pigs developed DCI. Remember, though, that > all of these pigs were castrated. Note also that body weight was not important. > The abstract is reproduced below for your education. > > Authors > Broome JR. Dutka AJ. McNamee GA. > Title > Exercise conditioning reduces the risk of neurologic decompression illness > in swine. > Source > Undersea & Hyperbaric Medicine. 22(1):73-85, 1995 Mar. > Abstract > During development of a pig model of neurologic decompression illness > (DCI) we noted that treadmill-trained pigs seemed less likely to develop > DCI than sedentary pigs. The phenomenon was formally investigated. > Twenty-four immature, male, castrated, pure-bred Yorkshire swine were > conditioned by treadmill running, while 34 control pigs remained > sedentary. All pigs (weight 18.75-21.90 kg) were dived on air to 200 feet > of seawater (fsw) in a dry chamber. Bottom time was 24 min. Decompression > rate was 60 fsw/min. Pigs that developed neurologic DCI were treated by > recompression. Pigs without neurologic signs were considered > neurologically normal if they ran on the treadmill without gait > disturbance at 1 and 24 h postdive. Of the 24 exercise-conditioned pigs, > only 10 (41.7%) developed neurologic DCI, compared to 25 of 34 (73.5%) > sedentary pigs (X2 = 5.97; P = < 0.015). Neither mean carcass density > (adiposity) nor mean age were significantly different between groups. No > patent foramen ovale was detected at necropsy. An additional control group > of 24 pigs was dived to clarify the influence of weight. The results > suggest that the risk of neurologic DCI is reduced by physical > conditioning, and the effect is independent of differences in age, > adiposity, and weight. > > -- > Send mail for the `techdiver' mailing list to `techdiver@terra.net'. > Send subscription/archive requests to `techdiver-request@terra.net'. >
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