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Treating suspected DCI with 100% O2 (is it wrong?)



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Old 30th March 2006, 10:30   #31 (permalink)
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Question Re: Treating suspected DCI with 100% O2 (is it wrong?)

Quote: (Originally Posted by saturation)
Under high pressures, heliox has advantages due to a countercurrent exchange.
What's that and how does it work please?

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Old 30th March 2006, 15:49   #32 (permalink)
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Re: Treating suspected DCI with 100% O2 (is it wrong?)

Quote: (Originally Posted by Mdemon)
What's that and how does it work please?


http://www.oxynet.org/02COSTinfo/protocol_dci.htm
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Old 30th March 2006, 19:02   #33 (permalink)
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Re: Treating suspected DCI with 100% O2 (is it wrong?)

Quote: (Originally Posted by saturation)
Great link - thank you!
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Old 31st March 2006, 03:14   #34 (permalink)
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Re: Treating suspected DCI with 100% O2 (is it wrong?)

Quote: (Originally Posted by saturation)
At 1 ATA, 100% 02 is the preferred gas. Under high pressures, heliox has advantages due to a countercurrent exchange.
May have advantages, you mean. Your link is to a research proposal which originated from the fact that it is simply not known if heliox has advantages. The evidence is poor or lacking, hence the proposal for a randomised controlled trial.

Many experienced diving physicians feel that the Comex 30 and its variants offer no advantage over a fully-extended USN Table 6 (RN Table 62).

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Old 31st March 2006, 17:01   #35 (permalink)
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Re: Treating suspected DCI with 100% O2 (is it wrong?)

Quote: (Originally Posted by apitkin)
May have advantages, you mean. Your link is to a research proposal which originated from the fact that it is simply not known if heliox has advantages. The evidence is poor or lacking, hence the proposal for a randomised controlled trial.

Many experienced diving physicians feel that the Comex 30 and its variants offer no advantage over a fully-extended USN Table 6 (RN Table 62).

Andy
Agree fully, "May" have. The proposal has all the pros/cons listed and the rationale for its use in one site. The disagreement as apitkin puts is why such a study need be done. Typically, the Comex 30 table is considered for severe DCI. As a summary:

http://www.sdm.scot.nhs.uk/dive_tables/index.htm
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