AW: AW: [HSF] the little heat exchanger for arch op´s

[Dr. Roberto Battellini]

Prasanna,
but our technicians assure 10 grades is risky!, they do it at 8 degrees
difference. Specially for patients coming from DHCA.
That´s whyi needed 2 hours!
Roberto

-----Ursprüngliche Nachricht-----
Von: openheart-l-bounces at lists.hsforum.com
[mailto:openheart-l-bounces at lists.hsforum.com] Im Auftrag von prasannasimha
Gesendet: Donnerstag, 21. Dezember 2006 14:20
An: OpenHeart-L at lists.hsforum.com
Betreff: Re: AW: [HSF] the little heat exchanger for arch op´s

That is basically why we also do not maintain a gradient of more than 
8-10 Degrees C.
I usually teach this to my perfusion students by heating coca cola.
Prasanna
Rwmfglycar at aol.com wrote:
>  
> In a message dated 12/21/2006 3:03:14 A.M. Eastern Standard Time,  
> battr at medizin.uni-leipzig.de writes:
>
> Do
> anyone rewarm with greater difference? And higher temperatures?.  We try
to
> avoid brain ödema.
>
>
>
> There is another reason for keeping the rewarming gradient under control.

> Dave Donald (Scottish veterinarian who was part of the team that brought
the  
> Mayo Gibbon machine to clinical use in 1955) showed in 1959 that gas
bubbles  
> coming out of solution during rewarming reached measurable levels when the

> temperature gradient was too high. I remember a number of 4 deg.  Celsius,
and 
> several cc. accumulating in a fairly short period of time,  but Dave was 
> assuming that any amount of gas bubbles in the  arterial blood was too
much. He did 
> not have a test that could tell the  damage that might be done in the
brain for 
> instance.
> Bob
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