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From: "Simon Naunton" <snaunton@ho*.co*>
To: mat.voss@t-*.de*
Cc: techdiver@aquanaut.com
Subject: Re: detecting bends
Date: Tue, 12 Mar 2002 07:49:46 +1100
I see your point, if you live/dive in Europe or the US. However, if for 
instance you live in Australia or the South Pacific where it may be several 
thousand kms to the nearest chamber, a simple diagnosis tool may be a good 
idea.


>From: mat.voss@t-*.de* (Matthias Voss)
>To: Simon Naunton <snaunton@ho*.co*>
>CC: John.Brett@qu*.co*, techdiver@aquanaut.com
>Subject: Re: detecting bends
>Date: Mon, 11 Mar 2002 13:56:24 +0100
>
>I did not keep the message refferring to the study, so this is only from
>my memory:
>Wasn't it said that Bennett _reported_ on the study ? So , if correct,
>he would not even need be directly related to this investigation, which
>seems, to my view, a bit obsolete.
>  When  a diver shows symptoms, and his history of decompression is
>known, then next steps/ measures are obvious. No need to treat someone
>with no symptoms.
>
>So , if this study even was on the right track, to what purpose I may
>question.
>If a diver showed symptoms, _then_ look into his liquids for bubbles,
>and, to decide _what exactly_, which would not have to be decided to
>begin with . Get a Heli _or not_ ? Throttle lLever down the dashboard
>_or not_ ? Report to the chamber _or not_ ?
>The mere idea gives me some chills, and a distinct notion to beware of
>quickshot medical reviews.
>Matthias
>
>Simon Naunton schrieb:
> >
> > >From: John.Brett@qu*.co*
> > >To: snaunton@ho*.co*
> > >Subject: RE: RE: detecting bends
> > >Date: Mon, 11 Mar 2002 04:42:19 -0500
> > >
> > > > Because this is an forum for the discussion of technical
> > > > diving and another
> > > > diver made a statement I happened to disagree with on the
> > > > basis of the facts presented.
> > >
> > >I'm still struggling to work out what basis you have on
> > >which to express your disagreement. Do you have more
> > >knowledge than the WKPP about decompression?
> >
> > Errmm... no, and I haven't claimed to have.
> >
> > >Do you know
> > >Dr Bennett?
> >
> > Not personnally. How, apart from being a leader for you to name drop, is
> > this relevant?
> >
> > >
> > > > Strictly speaking, we are not talking about
> > > > decompression, we are
> > > > talking about the possibility of a simple method of
> > > > determining whether a diver has DCI or not.
> > >
> > >Ugh!  It seems that you haven't understood G's comments.
> > >Detecting *venous* bubbles isn't the same as detecting
> > >a bend - a PFO makes a *big* difference to their significance.
> > >There's also far more going on at the sub-clinical level
> > >before you get visible symptoms, by which time the damage
> > >is done.
> >
> > So are you saying that once someone is bent then there is no point in
> > attempting treatment?
> >
> > I have sent this in a mail that has yet to appear on the list, but are 
>these
> > venous bubbles? Could they not have been formed directly from gas in the
> > divers mask?
> >
> > >
> > > > > > Regardless of
> > > > > > the achievements you have made with the WKPP, which are
> > > > > > truly impressive, I
> > > > > > am more inclined to believe a doctor who specialises in
> > > > > > hyperbaric medicine than yourself.
> > > > >
> > > > >Your loss.
> > > >
> > > > Subjective. It could be considered you loss as well.
> > >
> > >I know how to deco, thanks to G.
> >
> > I too have learned from him. I reiterate that I am in no way challenging 
>his
> > deco procedures.
> >
> > >
> > > > Not so sure. A prostitute would probably be able to give a
> > > > trick or two on
> > > > avoiding the clap, but a doctor would be far more likely to
> > > > be able to tell
> > > > you what is going on in the body with some degree of
> > > > accuracy. Similarly,
> > > > George and the WKPP are a wealth of information on deco
> > > > practice, however,
> > > > AFAIK none of them have spent enough time at med school, if
> > >
> > >Bill Mee is a doctor of microbiology (WKPP project engineer)
> >
> > Did he attended medical school? BTW I am  not trying not to be 
>provocative.
> >
> > >
> > > > any time at all,
> > > > to go up to a hyperbaric doctor and tell him he is wrong,
> > > > particularly with
> > > > the minute amount of information presented in the email.
> > >
> > >Dr Hamilton goes to the WKPP for advice...
> >
> > I thought the WKPP acted as test-ish subjects-ish?
> >
> > >
> > > > I read somewhere that George was a stock broker. I believe
> > > > that Dr Bennett
> > > > is very active in his field, both treating patients and
> > > > conducting research, so could hardly be called a theoretician.
> > >
> > >So just how much do you know about Dr Michael Bennett?
> > >Does he actually dive?
> >
> > Not much. I don't know. What is the relevence of whether he dives or 
>not?
> >
> > >
> > > > By the same token though, I do not
> > > > believe that any of the WKPP have ever sold their bodies for
> > > > the sexual
> > > > gratification of another party, but I also have never met any
> > > > of them so
> > > > that is pure speculation.
> > >
> > >Speculation appears to form the basis of your arguments.
> > >Not the best basis on which to work.
> > >I've tested G's decompression strategy to the best of
> > >my ability, so I have a little more basis than speculation
> > >on which to rate G's opinions over a doctor of whom I've
> > >never heard.
> >
> > As I have already said, I am not challenging G's decompression strategy 
>- I
> > am not in the position to do that, just his rubbishing of Dr Bennetts 
>study
> > based on the information contained in one paragraph written by a 
>newspaper
> > journalist.
> >
> > >
> > > > >Personally, I'd rather listen to someone who bets his
> > > > >life on the outcome, rather than one who bets a published
> > > > >paper.
> > > >
> > > > True, but this is not really relevant in this context.
> > > >
> > > > With apparently 0 incidents of DCI amongst WKPP members, how
> > > > much experience
> > > > does the WKPP have with DCI compared with a hyperbaric
> > > > doctor?
> > >
> > >Sigh. You obviously have *no* idea about the WKPP.
> > >The US Navy come to the WKPP for decompression advice, and
> > >have sent their hyperbaric doctors to examine WKPP divers
> > >after diving.
> >
> > Your point being? They have loads of experience at DCI avoidence.
> >
> > >
> > > > Bottom line:
> > > > Have the WKPP studied the formation of bubbles in the tear
> > > > film of the human
> > > > eye due to changes in ambient pressure? Probably not. Has Dr
> > > > Bennett? Yes.
> > >
> > >The relevance being...?
> >
> > The relevence being that Dr Bennett has studied it and concluded that
> > subjects with 20-30 bubbles in the tear film of their eyes also had DCI 
>and
> > those with 2-3 did not. G & the WKPP, AFAIK, have not studied this, so 
>how
> > can G justify his statement that it is bullshit - but I guess that you
> > cannot answer that John.
> >
> > >
> > >The issue is not so much whether additional bubbles appear in
> > >the tear film after diving, but the interpretation & relevance
> > >of the findings. Just finding bubbles isn't the same as DCI,
> > >which isn't the same as needing treatment.
> >
> > I think that you are looking at this from the wrong angle. I don't 
>believe
> > that Dr Bennett even implies that these bubbles are the cause or part of 
>the
> > damaging part of DCI, there are simply 20-30 bubbles with subjects with 
>DCI
> > and 2-3 with subjects without, therefore, the possiblity exists for an 
>easy
> > test.
> >
> > >
> > >John
> >
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Simon Naunton
snaunton@ho*.co*


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