Mailing List Archive Mailing List Archive
This message is in MIME format. Since your mail reader does not understand
this format, some or all of this message may not be legible.
------_=_NextPart_001_01C1B05E.6CFDEEC0
Content-Type: text/plain
George,
Thanks for taking the time to disseminate this info, there are a lot of us
looking forward to the follow ups to come.
You mentioned heliox and how it is "impractical for most of us". As I am new to
Trimix and have never used Heliox, could you explain what you mean?
Thanks
Andy
-----Original Message-----
From: George Irvine [mailto:girvine@be*.ne*]
Sent: Thursday, 7 February 2002 10:48 PM
To: Dogtrner1@ao*.co*; Techdiver@Aquanaut.Com
Subject: RE: Decompression DIR style
Karla, let me get to that one once we have explained the full story on deco.
The full story entails the physiological aspects. This is where helium shines.
I will go over all of that.
The short answer is that what goes in fast also goes out fast, helium causes
no damage and thus no immune system response as does nitrogen, it is easier to
breathe, it solves other problems ( like narcosis for deep deco), it does not
already exist in the body or have any function in our physiology.
If you had your choice of any gas to dive, it would be heliox for everything.
As this is impractical for most of us, we try to do it as close to what is
optimal given the resources at our command. I have a Haskel pump, and I still
don't do it. Luckily, the presence of helium in at least 25-30% of the mix
seems to be enough to hold off the stiffening effects on red cells at shallower
depths. Deeper , I push the helium into the 60-70 range. With Luxfer 80's in
fresh water, 65% seems to be the level that makes the bottles neutral when
full, a big advantage for long range multi stage diving, but that is another
topic.
I'll get to it fully in the posts to follow. I want to be sure everyone can see
the basic hemodynamics of this from the first post so that the rest does not
look like bullshit.
-----Original Message-----
From: Dogtrner1@ao*.co* [mailto:Dogtrner1@ao*.co*]
Sent: Thursday, February 07, 2002 6:09 AM
To: trey@ne*.co*
Subject: Re: Decompression DIR style
In a message dated 2/6/2002 10:20:26 PM Eastern Standard Time, girvine@be*.ne*
writes:
Most of you are familiar with the worst of them, which is "get off the
helium as fast as you can". If dive instructor has told you that, you are
dealing with the worst kind of idiot.
Could you explain. The reason I was told this was because your tissue
saturation is so quick with helium.
I am willing to agree that it might be wrong. But why is it wrong?
Permission to repost this to the list.
Karla
------_=_NextPart_001_01C1B05E.6CFDEEC0
Content-Type: text/html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=US-ASCII">
<META content="MSHTML 5.00.3105.105" name=GENERATOR></HEAD>
<BODY>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=228090105-08022002>George,</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=228090105-08022002></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=228090105-08022002>Thanks
for taking the time to disseminate this info, there are a lot of us looking
forward to the follow ups to come.</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=228090105-08022002></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=228090105-08022002>You
mentioned heliox and how it is "impractical for most of us". As I am new to
Trimix and have never used Heliox, could you explain what you
mean?</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=228090105-08022002></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=228090105-08022002>Thanks</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=228090105-08022002></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=228090105-08022002>Andy</SPAN></FONT></DIV>
<BLOCKQUOTE style="MARGIN-RIGHT: 0px">
<DIV align=left class=OutlookMessageHeader dir=ltr><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> George Irvine
[mailto:girvine@be*.ne*]<BR><B>Sent:</B> Thursday, 7 February 2002
10:48
PM<BR><B>To:</B> Dogtrner1@ao*.co*;
Techdiver@Aquanaut.Com<BR><B>Subject:</B>
RE: Decompression DIR style<BR><BR></DIV></FONT>
<DIV><SPAN class=770023811-07022002><FONT color=#0000ff face=Arial
size=2>Karla, let me get to that one once we have explained the full story on
deco. The full story entails the physiological aspects. This is where helium
shines. I will go over all of that.</FONT></SPAN></DIV>
<DIV><SPAN class=770023811-07022002><FONT color=#0000ff face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=770023811-07022002><FONT color=#0000ff face=Arial
size=2>The
short answer is that what goes in fast also goes out fast, helium
causes
no damage and thus no immune system response as does nitrogen, it is easier
to
breathe, it solves other problems ( like narcosis for deep deco), it does not
already exist in the body or have any function in our
physiology.</FONT></SPAN></DIV>
<DIV><SPAN class=770023811-07022002><FONT color=#0000ff face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=770023811-07022002><FONT color=#0000ff face=Arial
size=2>If
you had your choice of any gas to dive, it would be heliox for everything. As
this is impractical for most of us, we try to do it as close to what is
optimal given the resources at our command. I have a Haskel pump, and I still
don't do it. Luckily, the presence of helium in at least 25-30% of the mix
seems to be enough to hold off the stiffening effects on red cells at
shallower depths. Deeper , I push the helium into the 60-70 range. With
Luxfer
80's in fresh water, 65% seems to be the level that makes the bottles neutral
when full, a big advantage for long range multi stage diving, but that is
another topic.</FONT></SPAN></DIV>
<DIV><SPAN class=770023811-07022002><FONT color=#0000ff face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=770023811-07022002><FONT color=#0000ff face=Arial
size=2>I'll
get to it fully in the posts to follow. I want to be sure everyone can see
the
basic hemodynamics of this from the first post so that the rest does not look
like bullshit.</FONT></SPAN></DIV>
<BLOCKQUOTE>
<DIV align=left class=OutlookMessageHeader dir=ltr><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
Dogtrner1@ao*.co*
[mailto:Dogtrner1@ao*.co*]<BR><B>Sent:</B> Thursday, February 07,
2002 6:09
AM<BR><B>To:</B> trey@ne*.co*<BR><B>Subject:</B> Re:
Decompression DIR
style<BR><BR></FONT></DIV><FONT
face=arial,helvetica><FONT size=2>In a
message dated 2/6/2002 10:20:26 PM Eastern Standard Time,
girvine@be*.ne* writes: <BR><BR><BR>
<BLOCKQUOTE
style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px;
PADDING-LEFT: 5px"
TYPE="CITE">Most of you are familiar with the worst of them, which is "get
off the <BR>helium as fast as you can". If dive instructor has
told
you that, you are <BR>dealing with the worst kind of
idiot.</FONT><FONT
color=#000000 face=Arial lang=0 size=3
FAMILY="SANSSERIF"></BLOCKQUOTE><BR></FONT><FONT color=#000000
face=Arial
lang=0 size=2 FAMILY="SANSSERIF"><BR>Could you explain. The reason
I
was told this was because your tissue saturation is so quick with helium.
<BR><BR>I am willing to agree that it might be wrong. But why
is it
wrong? <BR><BR>Permission to repost this to the list.
<BR>Karla</FONT>
</FONT></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
------_=_NextPart_001_01C1B05E.6CFDEEC0--
--
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]