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DCS vs DCI DCS has been the traditional abbr of 'bends'. When in the late 80's Francis et al presented a bunch of hyper MD's case histories (retrospective study) & got diagnoses that were not uniform, it was thought that maybe the distinction b/ 'bends' & pathology secondary to arteriolization of bubbles was not as distinct - thus came the term DCI wh/ puportedly covers both etiologies. Use in the field is spotty & @ does cause some confusion. As for exercise & bubbling. Obviously any pathogenesis would have to depend on severity of exercise as well as the severity of the exposure. Type of exercise would play a role as well. The 1st clue that exercise during deco (specifically stage deco) came when navy divers doing jumping jacks @ stops got an inordinate # of hits. Then the case of AF cadets who got bent 1st ascribed to altitude (in CO), then was reviewed & the issue of their post exposure exercise routines came up. Ask some AF AP's about that - U will gat a story. Pre dive exercise - obviously the interval b/ exer & dive is important. That is was homostasis established? If not any of the mech ascribed to bends risk factors could come to mind: muscular microheating increased circulation causing increased N2 loading early in the dive CO2 or acidemia The list goes on. The intensity of the exercise & not exercise itself appears to B the contributor. I am not sure that there have been enough studies that looked how type of exercise correlated w/ predisposition to 'bends' Safe bubbles Esat Atikkan --- Rich Lesperance <richl@uf*.ed*> wrote: > Doc Black: > > When listing DCS predisposing factors, you > listed : > > >>heavy exercise during or shortly after diving, << > > Exercise _before_ diving is included also, yes? Not > trying to sharpshoot, > just making sure the conventional wisdom hasn't > changed on me. > > Secondly, it's a nitpicky thing, but in the medical > / dive physiology > community, are the terms "DCI" and "DCS" synonymous? > I always though DCI > included _other_ pressure conditions treated by a > chamber, namely AGE. If my > memory is fuzzy, maybe it means I'm getting old? > > Anyone else feel free to jump in with your > impressions on the specificity of > the above terms. Obviously, whatever the educated > majority here feels is > correct, is the correct definition, by definition. > > Rich L > > > ----- Original Message ----- > From: Michael J. Black <mjblackmd@ya*.co*> > To: Aquanaut Mail <techdiver@aquanaut.com> > Sent: Monday, January 10, 2000 4:38 PM > Subject: Re: DCI Preconditions > > > > Steve, > > > > DCI preconditions include PFO (which you can be > checked for), > > pulmonary blebs (which develop in obstructive > disorders like > > bronchitis, emphysema, and asthma), and other > cardiac or vascular > > defects that could lead to right-to-left shunting > of blood, i.e. > > venous to arterial shift. > > > > Risk factors are numerous, including dehydration, > obesity and > > poor physical condition, pushing the table limits, > heavy exercise > > during or shortly after diving, hypothermia, > previous DCI, age, > > alcohol, etc. > > > > Common sense counts for a lot, and even if you > don't know all > > the risk factors, just be careful. If doing > extreme diving, or > > advanced technical diving like many on this list, > it probably > > is a good idea to get checked for PFO (although > some will argue > > that every diver should be checked). As for > pulmonary blebs, > > don't smoke (common sense). > > > > Mike Black > > __________________________________________________ > > Do You Yahoo!? > > Talk to your friends online with Yahoo! Messenger. > > http://im.yahoo.com > > -- > > Send mail for the `techdiver' mailing list to > `techdiver@aquanaut.com'. > > Send subscribe/unsubscribe requests to > `techdiver-request@aquanaut.com'. > > -- > Send mail for the `techdiver' mailing list to > `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to > `techdiver-request@aquanaut.com'. > __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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