Mailing List Archive Mailing List Archive
This is a multi-part message in MIME format. ------=_NextPart_000_015E_01C1B322.324F43C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable "High partial pressures of nitrogen cause the red cells to become rigid = and get hung up in capillaries or damage them. The response of the body to = this and the immune response tend to close off the area . Anyone ( but a dive instructor) can see what that means for decompression." Hi George & List, As always, thanks for the info. With respect to red cell rigidity with a high pp of N2, my knowledge of = physiology has dulled somewhat over the years, but red cells do distort = (squash) as they move through smaller capillaries, which would make the = prospect of increased rigidity of the RBC quite alarming. That is, small = capillaries are smaller than RBC. Hence, it could be that we see RBCs = unable to pass and associated capillary rupture. Do you think there is a threshold partial pressure where the effect of = RBC rigidity becomes marked, or is there a linear change? I would think there would be an age variable here as well. If so, did this (theoretical) threshold partial pressure of N2 (causing = BBC rigidity) influence the GUE recomended mixes? I realize you are keeping the narcotic values at around or less than = 30m. What I am getting at is a "threshold physiologically damaging pp of N2", = as well as a narcotic level. We seem to be able to quantify a narcotic value (=3Dlevel). This is fascinating stuff, and would keep some PhD students going for = years. Regards, Jeff the Darwinian. I'm going to send this quick, B4 I confuse myself any = further............. ------=_NextPart_000_015E_01C1B322.324F43C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content=3D"text/html; charset=3Diso-8859-1" = http-equiv=3DContent-Type> <META content=3D"MSHTML 5.00.2919.6307" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>"High partial pressures of nitrogen = cause the red=20 cells to become rigid and<BR>get hung up in capillaries or damage them. = The=20 response of the body to this<BR>and the immune response tend to close = off the=20 area . Anyone ( but a dive<BR>instructor) can see what that means for=20 decompression."</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Hi George & List,<BR>As always, = thanks for the=20 info.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>With respect to red cell rigidity with = a high pp of=20 N2, my knowledge of physiology has dulled somewhat over the years, but = red cells=20 do distort (squash) as they move through smaller capillaries, which = would make=20 the prospect of increased rigidity of the RBC quite = alarming.</FONT><FONT=20 face=3DArial size=3D2> That is, small capillaries are smaller than RBC. = Hence, it=20 could be that we see RBCs unable to pass and associated capillary=20 rupture.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Do you think there is a threshold = partial pressure=20 where the effect of RBC rigidity becomes marked, or is there a linear=20 change?</FONT></DIV> <DIV><FONT face=3DArial size=3D2>I would think there would be an age = variable here=20 as well.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>If so, did this (theoretical) threshold = partial=20 pressure of N2 (causing BBC rigidity) influence the GUE recomended=20 mixes?</FONT></DIV> <DIV><FONT face=3DArial size=3D2>I realize you are keeping the narcotic = values at=20 around or less than 30m.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>What I am getting at is a "threshold=20 physiologically damaging pp of N2", as well as a narcotic = level.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>We seem to be able to quantify a = narcotic value=20 (=3Dlevel).</FONT></DIV> <DIV><FONT size=3D2><FONT face=3DArial>This is fascinating stuff, and = would keep=20 some PhD students going for years.</FONT></FONT></DIV> <DIV><FONT size=3D2><FONT face=3DArial>Regards,</FONT></FONT></DIV> <DIV><FONT size=3D2><FONT face=3DArial>Jeff the = Darwinian.</FONT></FONT></DIV> <DIV><FONT size=3D2><FONT face=3DArial></FONT></FONT> </DIV> <DIV><FONT size=3D2><FONT face=3DArial>I'm going to send this quick, B4 = I confuse=20 myself any further.............<BR></DIV></FONT></FONT></BODY></HTML> ------=_NextPart_000_015E_01C1B322.324F43C0-- -- 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]