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

[prasannasimha]

Coil over a sterile path of PVC tubing that is disposable. That would be 
cost effective and reusable at least wrt disposables which would be cheap..
The problem would be the heat transfer coefficient of the PVC tube.
Incidentally I use the bear hugger to warm IV fluids using standard IV 
tubings as a cheaper blood warmer. We bought a blood warmer but the 
blessed thing requires disposables worth Rs 850 per case. That has 
become was big white elephant and so isn't used. I can also warm FFP 
using the outflow of the Bair hugger  and that also works pretty well. I 
think Bair hugger has  a disposable warmer attachment but that also is 
very expensive.
Incidentally many years back we had a major mishap - the current went 
off, 2 generator back ups failed and both the heating cooling units 
tripped (Talk about Murphy's Law) so we had a patient at 28 Deg that 
needed warming urgently so I hooked a coil of PVC tubing , a thermometer 
and warm water and circulated blood through this coil. I opened both 
pleural spaces and filled it and the pericardial cavity with warm water 
(which luckily was around) and we could warm up the patient and 
disconnect him from CPB. Never know when you might have to do something 
sometime somewhere !!
Prasanna
Rwmfglycar at aol.com wrote:
>  
> In a message dated 12/22/2006 9:04:59 A.M. Eastern Standard Time,  
> prasannasimha at gmail.com writes:
>
> I have  seen these sort of coils in disposable things but was wondering 
> if they  have a reusable one- that would be great -
> Some years ago (I think around  14 years back) I made a heating cooling 
> blanket using 1/4th inch tubes  coiled in a counter current mechanism to 
> warm and cool our patients.  Actually one of my perfusionists presented 
> it in their  conference.
> Hence my interest especially wrt to  design.
> Prasanna
>
>
> Here is a project: what does it take to ensure absolute safety after  
> cleaning and resterilising equipment through which blood has passed. The US  answer 
> is simple: too much. But there may be a better answer for you.
> Bob 
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