Question

how is dialysis helpful for the patients suffering from kidney failure?

Answer 1

Answer- Sometimes a person's kidneys may stop working due to infection or injury which leads to kidney failure as the waste matter start accumulating in the blood. Those persons can not survive unless their blood is filtered periodically through an artificial kidney. This process is called dialysis.
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Answer 2

The history of dialysis dates back to the 1940s. The first type of dialyzer, then called the artificial kidney, was built in 1943 by Dutch physician Willem Kolff. Kolff had first gotten the idea of developing a machine to clean the blood after watching a patient suffer from kidney failure.