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Date: Tue, 12 Mar 2002 11:22:10 +1100
Subject: Re: detecting bends
From: Dean Laffan <email@re*.co*.au*>
To: <techdiver@aquanaut.com>
on 12/3/02 12:52 AM, Esat Atikkan at atikkan@ya*.co* wrote:

> This info has been about for at least 2 yrs, if not
> longer.  W/O a doubt it may prove to B a more
> valuable/practical tool to quantify deco mediated
> bubbles.  

I was hoping the same, but am not so sure after reading the paper. A fair
bit of the methodology deals with the variation in collection data due to
operator difference in counting bubbles.
 
> However it still does not resolve the main issue -
> does there exit a causal relationship between deco
> mediated bubbles & clinical DCS.

That's exactly what the paper stresses also. The author himself states, they
are a long way from establishing anything other than these ocular bubbles
MAY be a useful tool at some stage in the future, but a lot more work is
needed (and is being done now)

All the dives were on air to PADI NDLs, since the volunteers were local rec
divers. So that obviously opens up a whole raft of questions as to relevance
when diving helium and doing correct profiles and deco versus the standard
PADI bullshit.

> Safe bubbles - irrespective how they R detected.
> Esat Atikkan

Amen to that.

I contacted the author who forwarded the paper to me and has given his
permission for me to make it available. It's a 340kb PDF I have slapped up
at www.realworld.com.au/OccularTears.pdf

This above version of the paper is somewhat abridged, the full papers are in
the actual Journals:

  1.. Bennett MH. Ocular tear film bubbles- finally, a diagnostic test to
cry for? South Pacific Underwater Medicine Society Journal 1999;29:233-238.
  2.. Bennett M, Doolette D, Heffernan N. Ocular tear film bubble counts
after recreational compressed air diving. Undersea and Hyperbaric Medicine
2001; 28(1):1-7.

regards


dean laffan
real world productions
melbourne, australia
ph +613-9419-3966
Mobile 0418-525-315

-- 
"There are three kinds of men:
1. The ones that learn by reading.
2. The few who learn by observation.
3. The rest of them have to pee on the electric fence for themselves."

 -  Will Rogers


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