100% O2 for DECO Stops

[The Iceni]

I gather xenon is such a large molecule that it causes general anaesthethia at normal atmospheric pressure.

Decompressing with xenon? - Do not try this at home!

Point taken Dr Deco. I think that was what I tried to say in my post.

However it is not strictly correct to state that gas molecules do not interact in the gaseous phase because they do.

This was shown in 1910 by Nobel Laureate, Professor Johnnes Van der Waals. However, I fully appreciate this becomes apparent at the pressures used to FILL diving cylinders not at the pressures at which the gas is used as a breathing medium.

Kind Regards,

 

[Dr Deco]

Dear Paul:

It is absolutely true that gases can interact. Mea culpa I was not thinking of such high pressures however.

One problem with xenon is that it is very anesthetic at atmospheric pressure. This was demonstrated by Cullen and Gross in 1954 (I believe). It produced a surgical plane of anesthesia.

Dr Deco:doctor:

 

[BRW]

Certainly pure O2 switches in the shallow zone
(10 - 30 fsw) off any bottom mixes are beneficial
in eliminating dissolved inert gases and bubble
entrained inert gases. This is standard in
the technical, scientific, and military diving
sectors.
In the answer stream, somebody suggested it was
OK to also switch from nitrogen rich mixtures
(nitrox) on one dive to helium rich mixtures
(heliox) on the next dive. NOT SO unless
SIs are long. The problem is still isobaric
counterdiffusion in the slow compartments.
The idiom "don't switch from heavy to light
gases" during mixed gas diving holds here as
practicum. Tec divers DO NOT switch from
nitrogen mixes to helium mixes in the course
of (2) repetitive deco divers.

Bruce Wienke
LANL CounterTerror Dive Team Ldr

 

[Uncle Pug]

Boy am I glad to see that you are signed on to Scuba Board!!!

Post early and post often.

 

[The Iceni]

Bruce Weinke - Junior member?????

I don't think so!

 

[devilfish]

Well, well, look who's here. Welcome Bruce.

 

[Tavi]

Glad to see you here on the boards, Welcome!!

 

[The Chairman]

to the illustrious Mr. Wienke from Central Florida. Glad to have you aboard!!!

 

[BILLB]

Dr. Bruce Weinke, thanks for joining our discussions. I just got my NAUI email concerning the RGBM dive tables. I cannot wait to get my copies. Please offer to all of us your research and reasoning that has made the RGBM tables superior to all others.

Again, thanks for joining.