Was GUE all wrong?! - Latest SCIENCE about Oxygen Narcosis!

#divegue #doktorben
For years, GUE has taught that oxygen is as narcotic as nitrogen and that oxygen narcosis might be a thing. But a new study by GUE Instructor and researcher Xavier Vrijdag suggests that the narcotic effects of oxygen may not be as severe as previously thought. In this video, we'll explore the latest findings on oxygen narcosis and what they mean for technical divers like you. Don't miss out on this important information!
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doi.org/10.14814/phy2.15386 - Xaviers research paper
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+++ TABLE OF CONTENTS +++
00:00 Intro
02:00 Methodology
13:56 Is Nitrox the better breathing gas?
15:55 Mental Capacitity and FFF
20:12 Alternative Methods to evaluate narcosis
22:32 Increased excitability - What does that mean?
25:41 Oxygen Toxcicity
27:12 How to be a human guinea pig?
30:36 Book recommendations for long deco stops
31:37 Does GUE need to change materials?
35:30 Next Big Things in diving medicine research
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[@souswes]

Good for you for scrutinizing your preferred agency.
I was always under the impression that inert gasses cause narcosis. Never heard of oxygen narcosis before this video.

[@DoktorBEN]

I guess if you aren’t allowed to question your own agency, there’s something wrong with the agency. Inert gases do. But oxygen apparently, too.

[@GooseDiving]

What GUE is even more conservative?? Interesting discussion, thx for bringing it on the channel.

[@DoktorBEN]

Yeah…interesting topic and still more things to look at closely

[@lingen2193]

PADI also teaches that oxygen is as narcotic as nitrogen, so GUE is in good company there ;-)
But seriously: Very interesting interview!

[@DoktorBEN]

Thanks! Yeah it’s nothing bad to have that assumption, because it simplifies things while making everything more conservative

[@Ale-Tatauga]

I really enjoyed the interview and read the paper, but I have a question. Can gas density be a relevant factor for narcosis? In this study, the maximum oxygen depth considered was 18 meters. My point is, would it be possible to compare a dive to 47 meters with EAN 28 (PpO2 = 1.6) to another one with air? Or even EAN 32 at 40 meters? I understand that this way, gas density can be taken into consideration, and maybe find a diferent result?

[@DoktorBEN]

Well…good question. High gas density leads to CO2 built up which can cause CO2 narcosis.

[@Ale-Tatauga]

​@@DoktorBEN Just for theoretical purposes, if it were possible to compare an 18-meter dive with 100% nitrogen, would we experience narcosis?
My question is: Can high-density gas cause narcosis not only through partial pressure but also due to high gas density? If this statement is true, then during an 18-meter dive, even with pure nitrogen, we would not experience narcosis.

[@DoktorBEN]

@@Ale-Tatauga no, it’s still partial pressure. So apart from the fact you wouldn’t survive a 18m dive anyway, experience narcosis (however, ppN2 would not be above 3bars on 18 meters, so probably the narcosis would be mild)