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However, if your blood vessels are not adequate for a fistula, the doctor may use a soft plastic tube to join an artery and a vein under your skin. This is called a graft.
Occasionally, Temporary access takes the form of dialysis catheters, also called tunneled catheters made by means of a narrow plastic tube or hollow tubes inserted into large veins that can support acceptable blood flows. Most catheters are used in emergency situations for short periods of time.However, catheters can be used for prolonged periods of time, often weeks to months, but it is sometimes used for long-term treatment.Blood is diverted from the access point in the body to a dialysis machine. Here, the blood flows counter-current to a special solution called the dialysate. The chemical imbalances and impurities of the blood are corrected and the blood is then returned to the body. Typically, most patients undergo hemodialysis for three sessions every week. Each session lasts 3 - 4 hours.When is dialysis needed?You need dialysis when you develop end stage kidney failure , usually by the time you lose about 85 to 90 percent of your kidney function.What does dialysis do?Like healthy kidneys, dialysis keeps your body in balance. Dialysis does the following: