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- Newsgroups: rec.scuba
- Path: sparky!uunet!gatech!mailer.cc.fsu.edu!phi!mayne
- From: mayne@phi.cs.fsu.edu (William Mayne)
- Subject: Re: dangerous misconception (was Re: Human bodies explode...)
- Message-ID: <1992Nov19.145745.9605@mailer.cc.fsu.edu>
- Sender: news@mailer.cc.fsu.edu (Usenet News File Owner)
- Nntp-Posting-Host: phi.cs.fsu.edu
- Reply-To: mayne@cs.fsu.edu
- Organization: Florida State University Computer Science Department
- References: <1992Nov16.074547.5322@nntp.uoregon.edu> <1992Nov16.145952.5495@mailer.cc.fsu.edu> <1992Nov17.131637.5461@cattnts.canada.ncr.com>
- Date: Thu, 19 Nov 92 14:57:45 GMT
- Lines: 34
-
- In article <1992Nov17.131637.5461@cattnts.canada.ncr.com> craig@cattnts.canada.ncr.com (Craig Campbell) writes:
- >In article <1992Nov16.145952.5495@mailer.cc.fsu.edu> mayne@cs.fsu.edu writes:
- >
- >>While on the subject of dangerous misconceptions, oxygen toxicity
- >>doesn't kick in suddenly at 298', nor does it usually strike without
- >>any warning...
- >
- >Bill, in my Nitrox course, we were taught almost exactly the opposite.
- >Yes, there are a string of different symptoms which accompany O2 toxicity,
- >and people who have suffered from this and survived it report having most,
- >if not all, of the symptoms. The scarry part is that the majority (apparently)
- >reported having the symptoms in a quick succession (like a second or two).
- >Not enough time in which to react.
-
- This is scary, though possibly exaggerated scare stories. Another
- possibility is that the victims just didn't recognized symptoms until
- it was too late or there wouldn't have incidents to make it into the
- reports. Who wants to admit that they had plenty of warning and then
- let something nearly fatal happen? If they went into full seizures
- while under water they were lucky to survive. I doubt the reliability
- of their memories for details just before such an event, too.
-
- One of my instructors told me that he got experienced O_2 toxicity
- while decompressing on pure oxygen. He had enough warning to switch to
- air and avoided problems. But unlike someone diving deep enough on air
- to risk O_2 toxicity he would of course not have been narced and that
- could make a big difference.
-
- Anyway, thanks for adding a warning. Regardless of the details and
- slight differences in what we've heard I think we agree that you can't
- count on getting enough warning to do any good - or any at all. Extreme
- caution with high PO2 is warranted.
-
- Bill Mayne
-