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> Liz wrote:
> 
> > ...  since approx 25% of population
> > has PFO there are divers with PFO who are
> > asymptomatic.  But those with PFO are at
> > greater risk of DCS, embolic events and
> > hypoxia.
> 
> Why hypoxia?

Because a PFO allow blood to bypass the pulmonary circuit, thereby avoiding
oxygenation before returning to the main body circuit. If the PFO is severe
enough and the physical demands on the diver sufficient, this can result in
a shortage of oxygen in the bloodstream that can manifest itself as hypoxia.

Dave Waller

Hewlett-Packard Co.				19055 Pruneridge Ave.
Workstation Systems Division			Cupertino, CA 95014-9809
Channel Partner Consulting, West		(408|T) 447-4413
dwaller@cu*.hp*.co*

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