dialysis
- 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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