Hemodialysis and peritoneal dialysis are both treatment methods of filtering wastes from the body because the kidneys are no longer able to do so. One general difference between hemodialysis and peritoneal dialysis is that hemodialysis is for those who still have some kidney function left, and peritoneal dialysis is for those who actually have kidney failure and are waiting for a kidney transplant. Another general difference between hemodialysis and peritoneal dialysis is that in hemodialysis, the filtration of wastes occurs in a machine while in peritoneal dialysis the filtration occurs within the abdomen.
Basically in hemodialysis blood leaves the body gets filtered by a machine called a dialyzer and then returns to the body. The patient has two needles inserted into an access site on his arm with one needle for blood leaving the body and the other for blood re-entering the body.
When your kidneys fail, dialysis keeps your body in balance by removing waste, salt and extra water to prevent them from building up in the body
Hemodialysis uses an external machine and a special type of filter to remove excess waste products and water from the blood. Most people need 3 sessions of haemodialysis a week with each session lasting around 4 hours. This can be done in hospital or at home, if you've been trained to do it yourself. Two thin needles will be inserted into your AV fistula or graft and taped into place. One needle will slowly remove blood and transfer it to a machine called a dialyser or dialysis machine.
Peritoneal dialysis uses a fluid that is placed into the patient's abdominal cavity through a plastic tube. Before you can have CAPD or APD an opening will need to be made in your abdomen. This will allow the dialysis fluid (dialysate) to be pumped into the space inside your abdomen (the peritoneal cavity). A cut (incision) is usually made just below your belly button. A thin tube called a catheter is inserted into the incision and the opening will normally be left to heal for a few weeks before treatment starts.
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