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  • Created by: siobhan
  • Created on: 10-05-13 20:03
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  • Dialysis
    • if a person suffers from kidney failure they may be kept alive by dialysis
    • A dialysis machine carries out the same job as the kidneys. The blood flows between partially permeable membranes.
    • They dialysing fluid contains the same concentration of useful substances that the patients blood does e.g. glucose and mineral ions.
      • This means that these substances do not diffuse out of the blood so they do not need to be reabsorbed. Urea diffuses out of the blood into the dialysing fluid
    • Dialysis restores the concentration of substances in the blood back to normal, but needs to be carried out at regular intervals
    • If a kidney becomes available, the patient may have a kidney transplant. If the transplant is successful the person will not need further dialysis
    • Unlike transplants, do not require the patient to take immnosuppressant drugs which make the body more vulnerable to infection
    • dialysis is expensive
    • dialysis is very time consuming as it requires a trip to hospital every 3-4 days which severley limits travel
    • patients on dialysis have a very restricted diet but can eat whatever they want whilst the dialysis take place


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