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KOLFF’S ARTIFICIAL KIDNEY
In recent years a much more elaborate method has been developed to remove impurities from the blood when the kidneys are unable to do it. A Dutchman named Kolff has built a workable artificial kidney. A tube is placed in an artery of the patient. The blood flows from this through the artificial kidney and back to the patient’s vein. He is given a dose of heparin, a modern drug which helps prevent clotting. A big cylinder, carrying the cellophane tube which contains the blood, rotates in a bath of water, salt, potassium chloride, bicarbonate of soda, and glucose. This solution absorbs the poisonous substances from the blood.
It is evident that if the kidney is permanently damaged, this machine is useless. In from five to fourteen hours it may clear the blood of a severely sick patient but often more of the bad substances will form later and this procedure cannot be repeated many times. Certain poisons which do not combine too firmly with the blood – barbiturates, for instance – may be quickly washed out in this way. If you have a pain in your back which “kidney pills,” don’t cure, it will not be worth your while to negotiate for the use of this machine. It requires great judgment as to when it will be efficient and at present the number of these cases is few.
*40/276/5*

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