SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Dialysis unit. Nurse with a patient undergoing dialysis in an ambulatory care centre. Kidney dialysis, or haemodialysis, is required when the kidneys are no longer able to filter waste products from the blood properly. A patient's blood flows out of their body through a tube into a dialysis machine, or dialyser, which acts as an artificial kidney, removing waste products and excess fluid from the blood. The cleaned blood is then returned to the patient through a second tube. The procedure takes several hours and needs to be repeated several times a week. Photographed in Kaliningrad, Russia.
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