I feel like it would clear the waste and everything else so why do people still die even if the dialysis is taking over the function of the kidneys or anything else?
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The kidneys aren’t just filters. That’s a gross oversimplification. They are part of this complex feedback loop involving your brain, a bunch of glands, and other organs.
The easy way to look at is if you have too much or too little of something they tell your body how to react. Too much sodium can rob liquid from your cells due to osmosis. Too little and your nervous system stops working correctly. So they have to balance how much fluid is in your body with these salts. That’s just one job. They also have to help regulate other chemicals.
So just filtering is a stopgap at best. You are removing stuff from the blood that can become a problem and you can compensate for some of the rest with medications or supplements. But, part of the regulation system of the body is now gone. Dialysis is slowing the process of deteriorating functions. Not replacing.
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