Need help making a CAPD/Dialysis bag warmer Answered
We are doing a lot of traveling right now to a bunch of different hospitals and I need a heating device I can plug into the car or preferably run off a battery. I have a hard platt suitcase which will hold 2 bags and am toying with the idea of just insulating it and putting a heating pad in there to plug into an inverter. The problem there is I don't always have access to an outlet in the hospital, and you tend to look very much like a terrorist and scare the holy jeebus out of people strolling around the hospital with this wired suitcase thingy. I am unaware of IED or ordinance requiring an electrical outlet, but hospital security knows all about them and are just itching to go all *observe and report* on you.
I picked up one of those black and decker heat/cooler's at a yard sale with the intent to pop it open and see if anything can be repurposed, but I am not real confident on how to cover the elements so they don't melt the bags.
Temperature regulation is really important, and I really don't have the foggiest idea how to best do this. It's a 4.4lb bag of fluid, so it would have to heat 2 of them without turning them into boiling lava. It also can't be so weak that it takes 12 hours to heat the bag. It would need to get to 37*C/98.6*F (or near to it in any event) in about 4 hours.
This is the real McCoy I am trying to rinky dink replicate: http://www.kidneystuff.com/warmers.html
Keeping her alive ain't cheap so I simply don't have the 400$ to hand over for it.
Nutshell: I need help with (everything :P )
1. Heating element
2. How to best secure bags
3. Best/most efficient way to power it
4. What material and in what fashion to insulate the case.
5. How to regulate temperature.
I'm sure I missed some things, but really any and all advice would be more than greatly appreciated.