[Answer] 5. In 1940's, Willem Kolff produced a device that improved the quality of many lives. His device would ease the pain of renal end failure sufferers. What was this life-saving invention?

Step 1 : Introduction to the question "5. In 1940's, Willem Kolff produced a device that improved the quality of many lives. His device would ease the pain of renal end failure sufferers. What was this life-saving invention?"

...1. Dialysis machine 2. Decompression chamber 3. Diatometer 4. Difference engine Kolff's first model consisted of at least 45 meters of sausage casing to contain and filter the patient's blood. The dialysis machine would filter blood through a semi-permeable membrane and purify it in a saline solution. He was a highly ethical person, as shown when he refused to patent his invention. Also, he spent more than twenty years championing issues such as prison reform and public education.

Step 2 : Answer to the question "5. In 1940's, Willem Kolff produced a device that improved the quality of many lives. His device would ease the pain of renal end failure sufferers. What was this life-saving invention?"

Dialysis machine:

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