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From: "Rich Lesperance" <richl@uf*.ed*>
To: "Michael J. Black" <mjblackmd@ya*.co*>,
     "Aquanaut Mail"
Subject: Re: DCI Preconditions
Date: Mon, 10 Jan 2000 20:18:33 -0500
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
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