The blood then travels through a tube that takes it to the dialyzer. The blood goes through a needle, a few ounces at a time. The access is a surgically created vein used to remove and return blood during hemodialysis. Hemodialysis is a treatment for kidney failure that uses a machine to send the patient’s blood through a filter, called a dialyzer, outside the body. A vascular access is a hemodialysis patient’s lifeline, because it makes life-saving hemodialysis treatments possible.
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