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E - as you say the "overhwhelming" is both a very real cause in its own right in the absence of a PFO, and the cause of the presure change that opens a PFO. Also, the lesions may also be due to air diving. Bottom line is that a PFO test is a good idea, believing "negative" results is not . Esat Atikkan wrote: > > The study is relatively old. It was 1st published in > 1997. So it just being rehashed for the purpose of > some meeting - the game all academics play. > > The significance of the study is indeed questionable > (that is the BMJ paper in 97) for a # of reasons, > though it does make it obvious that deco protocoles > that limit bubble size should be invoked, as all > shunts R not the same. > > The next question is what R the meaming, > physiologically, of those brain lesions. W/ the > increase in the sensitivity of tests, one is able to > p/u finer & finer abberrations. What do they really > mean from the stndpt of the subject - no change, some > deficit in cognitive abilities, etc. > > Yes the observation was interesting. The nxt step > should B to study the significance of those lesions. > Ideally, then, if found significant, then means to > minimize the damage need to B developed. > > Arteriolization of venous bubbles can occur by mech > other than R2L shunting. The phenomenon is thought to > B associated w/ excessive bubbles in the pulmonary > circ, overwhelming the 'filtering' ability of the > pulmon capillaries (Also the putative cause of chokes, > a form of DCS). > > If it is the arteriolized bubbles, then it is > irrelevant if they were arteriolized via a shunt or > via the pulmon capil bed. > > Safe bubbles > > Esat Atikkan > > --- Deep1dave@ao*.co* wrote: > > I am glad to see this published. I have felt that > > most of the "unexplained" > > CNS hits were the result of right to left shunts > > such as a PFO. There are > > other types of right to left shunts. One is a > > ventricular septal defect. > > Basically, any defect that allows blood to get from > > the right side of the > > heart to left, without going through the filter of > > the lungs, should > > predispose a diver to this problem. > > > > David Horne DVM > > -- > > Send mail for the `techdiver' mailing list to > > `techdiver@aquanaut.com'. > > Send subscribe/unsubscribe requests to > > `techdiver-request@aquanaut.com'. > > > > __________________________________________________ > Do You Yahoo!? > Thousands of Stores. Millions of Products. All in one place. > Yahoo! Shopping: http://shopping.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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