Eli5- why if you have a blood disease can you not replace your blood?

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Like if you have sickle cell or blood cancer or things can you not just like use a dialysis machine to take out your sick blood and do new clean blood?

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Anonymous 0 Comments

They can do is very dire situations, its called an exchange transfusion. However, it doesn’t treat the underlying cause. An example of when you might do it is when someone with sickle cell anemia needs cardiac surgery, where they might be subject to conditions which would exacerbate their condition and kill them.

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