philoparts wrote:There is one problem to this; metabolic waste. If you can't breath or urinate, you have no way to get rid of metabolic waste buildup. Lack of oxygen isn't the only thing that kills you, after so many minutes (depending on temperature) serum blood potassium starts to shoot up. In the range of 8-10mEq/L, there isn't much hope of survival. They are working on a field serum potassium test for avalanche victims to determine viability after burials lasting 10+ minutes with cardiac or respiratory arrest. Still cool stuff, though. Plenty of other possible applications.
Elevated Potassium = Hyperkalemia
Low Potassium = Hypokalemia
In field or on medical helicopter testing CAN be done on a device such as the Piccolo Xpress which some air medical companies and the military have started to use but as it stands there are no "quick and easy" ways to diagnose hyper/hypokalemia. As far as treatment for an avalanche victim that is suffering from hyperkalemia due metabolic waste buildup or hypokalemia due to hypothermia there are various and fairly effect means to counter the elevated or decreased potassium levels. For hyperkalemia a patient can be given calcium, sodium bicarbonate, insulin + glucose, nebulized albuterol, or some other not so popular treatments. For Hypokalemia the treatment is pretty simple as you can generally just give potassium to raise the blood serum levels. Hyperkalemia is more difficult to treat due to problems with facilitated diffusion in the cellular membrane at times. The sodium bicarb, insulin + glucose, and nebulized albuterol all cause a redistribution and intracellular shift causing more potassium to be forced into the cell. The other treatments not listed treat hyperkalemia by removing potassium from the body, which doesn't work very well in cold wilderness emergencies due to vasoconstriction.
I have most likely go too far in depth to this but if you have any questions or want more explanation please feel free to ask. By the way the majority of what I stated is based off of the current Advanced Cardiac Life Support (ACLS) guidelines. These are only suggested or recommended by the AHA and not always adopted or used in all situations or all patients. MOST emergency medical cardiac protocols are based off of ACLS guidelines though.
EDIT: sorry this is a bit off topic from the original post but was more in reply to the quoted post