Mailing List Archive Mailing List Archive
The scrubber is supposed to remove the co2, and it does for the most part
unless you breathe real hard and fast in which case the reaction is not
allowed to occur properly or blows by the reaction, but the problems come in
as the scrubber material gets "used" up. In that Weinberg accident you can
see in the report that he was diving a previously used scrubber - a real
genius - saved himself a couple of bucks there for sure.
Another source of co2 is if the one way valves at the mouthpiece are not
shutting all the way on the intake side - this will cause some of your
breath to blow back and you end up rebreathing it with its higher co2
content.
Usually you can feel hypercapnia in the form of headache or instant muscle
cramps when you exert ( that is how I test for it since I am a masters
swimmer and used to hypercapnia - I kick for a couple of seconds real hard
to see if it produces that feeling ), but the big problem with hypercapnia,
like hypoxia , is that it effects the higher order brain functions first and
your judgment is impaired. This may lead you to believe you are ok when you
are actually in trouble. This is where a good buddy comes in - he sees your
unusual actions ( text book in the case of Weinberg ) and he gets you to go
to open circuit for what we call a "reality" check, but then we just have
records to report when we dive, not deaths and clusterfucks, but what do we
know relative to the great Tom Mouth and his band of strokes?
Hypercapnia will cause the blood ph to change and the hemoglobin bonds to
stop working to transport oxygen effectively, so it makes no difference what
the rb could do in the way of adding oxygen since it will not work anyway at
that point if shallow ( deep the higher concentrations are transported
enough in the plasma to do the job somewhat).
There are two real answers here to these age old questions: one is don't
dive an rb without a hell of a good reason, and 2) don't dive one without a
Jarrod Jablonski or GI equivalent buddy . By that I do not mean some super
diver, I mean somebody who is not a fucking asshole and who can act like a
real buddy.
-----Original Message-----
From: Aldo Solari [APS] [mailto:aldo.solari@ho*.se*]
Sent: Tuesday, July 03, 2001 2:10 AM
To: techdiver@aquanaut.com
Subject: RB question.
Dear all, I have no experience with RBs and wonder the following:
- If a diver gets stressed by some danger, produces a lot of CO2
which hits his brain and increases significantly hos O2 need:
- will the RB respond to such quicly changes and much higher
demand of O2 __without__ producing an anoxia and a blockout ?
Cheers,
----
aldo.solari@ho*.se* (fisheries biologist)
Home page, www.ccbb.ulpgc.es/fish-ecology/solaris
----
--
Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
--
Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]