Hyperbaric Chamber and Oxygen Toxicity

[ross9]

Hi,

When a patient is admitted to a hyperbaric chamber and pressurised to say 18m, are they given 100% oxygen or a lower oxygen mix to account for oxygen toxicity? If the former, how does the chamber prevent oxygen toxicity?

Thanks

 

[Jack Hammer]

100%, toxing out of water wont cause drowning or death.

 

[drk5036]

100%, toxing out of water wont cause drowning or death.

How often does that happen? A pO2 of nearly 3 seems really high!

 

[CuriousRambler]

They cycle air breaks and don't maintain 100% nonstop. There's also a distinct and not well understood difference in how the body reacts to oxygen dry in a chamber as opposed to submerged.

 

[dmaziuk]

How often does that happen? A pO2 of nearly 3 seems really high!

"In 1910 Bornstein was probably the first to expose two human volunteers in a dry dive setting to hyperbaric oxygen at a PO2 of 2.8 ATA (equal to 283.7 kPa) for 30 min without any complaints (Acott, 1999)."
-- Oxygen Toxicity and Special Operations Forces Diving: Hidden and Dangerous

 

[fmerkel]

There are 21% 'rest breaks'. Not sure what the ratio of 100% to 21% is.

 

[Akimbo]

This link explains it in reasonably simple terms:
Oxygen Toxicity Limits & Symptoms

 

[ross9]

That's helpful, thanks all!

 

[Saniflush]

This link explains it in reasonably simple terms:
Oxygen Toxicity Limits & Symptoms

Thanks for posting that link!
Fascinating read.