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What is your experience with the "helium willies" (for lack of a better
term) thing? A couple people I've talked to (including Rod Nairne) say
they feel the same thing with no N2 at depths in excess of about
200-250. I remember you saying something about being too wigged if there
wasn't enough N2 in the bottom mix. I have no clue what this is - the
experts say it's too shallow for HPNS, and besides, the symptoms aren't
exactly right (although I do experience more HPNS-like symptoms starting
at aroung 380-400). One thought is that it is really all just
psychological (i.e., being clear-headed enough to ask yourself "What the
F**k am I doing here?!?!"), but I think it's more than that, because the
symptoms severeity is consistent regardless of how spooky the conditions
are.
Rich
On Wed, 3 Sep 1997, G. Irvine wrote:
> No, I agree - you have to get away from the helium before it builds up.
>
> Richard Pyle wrote:
> >
> > > To tell you the truth, the more I see it, the shallower I make my aed
> > > for nitrogen. The problem then becomes that you do not have as much gas
> > > due to the lower degree of compressibility.
> >
> > This much I agree with - I started limiting my PN2 to about 2.5 atm as
> > soon as I started using the rebreather. The compressibility issue is
> > insignificant with a rebreather - even a semi-closed one. Put N2 in your
> > bailout cylinders. The only reason I use nitrogen at all anymore is to
> > alleviate the "helium willies", which I know you already know about.
> >
> > > Personally, I do not like the feel of a 130 air dive later on, so there
> > > is some kind of damage, so maybe just having ANY helium works, since a
> > > 130 trimix dive does not produce the same effect, and a 130 aed trimix
> > > dive does not produce the same ell as a 130 air dive.
> >
> > Everytime I go deeper than 100 feet on air I feel like shit that night
> > and the next morning. I realized that I always felt that way before, but
> > just figured it was related to diving in general. I don't feel that way
> > at all with the helium - not even after the days where I do two deep
> > ones, and even on dives when the PN2 is greater than it is for air at
> > 100-130. I don't think it's the presence of helium as much as it is the
> > elevated O2 on deco.
> >
> > > I am just going with what my experience tells me, but now we are in the
> > > mood to take it further to see hat the story is, besides, I like rabbit.
> >
> > When you do these experiments, let me know how the rabbit tells you
> > when its shoulder hurts.
> >
> > Don't get me wrong, george - I keep the N2 to a minimum also. It's just that
> > I am smart enough to know that "quickie" explanations like the RBC rigidity
> > thing are usually only a small part of the full picture, if any part at all.
> > I am also very dubious about doing deco on helium as compared to doing the
> > bottom on helium and the deco on N2.
> >
> > Rich
> >
> > Richard Pyle
> > Ichthyology, Bishop Museum deepreef@bi*.bi*.ha*.or*
> > 1525 Bernice St. PH: (808) 848-4115
> > Honolulu, HI 96817-0916 FAX: (808) 841-8968
> > "The views are those of the sender and not of Bishop Museum"
>
Richard Pyle
Ichthyology, Bishop Museum deepreef@bi*.bi*.ha*.or*
1525 Bernice St. PH: (808) 848-4115
Honolulu, HI 96817-0916 FAX: (808) 841-8968
"The views are those of the sender and not of Bishop Museum"
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