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Esat, can you get the acidosis without exerting under hyperbaric conditions? Does the higher pp of CO2 make for acidosis without the exertion is a better question. Esat Atikkan wrote: > > 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'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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