Quote: (Originally Posted by
Dr. Tom)
Hi Dave
Tom Mount here, Just a note IANTD forbids practices such as this. I post as you referenced and listed various agencies Having a po2 of 3.0 in the loop exposes a student to risk beyond any justifable need and is a direct viloation of standards that IANTD does enforce. Practices such as this will not be tolerated in IANTD.
Tom at no point is the student breathing the loop with an elevated PPO2 whatsoever, he is on open circuit.
He comes off the loop at a breathable PPO2 and then raises the PPO2 off the loop whilst breathing from an open-circuit regulator.
The instructor checks the PPO2 is lowered before allowing the student back on the loop.
The student is never exposed to the high PPO2.
Hope this clarifies.
Cheers,
Dave.