Dialysis

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  • Dialysis
    • Key points
      • substitute for many normal duties of the kidneys
        • clean blood and remove waste products
        • balance water and salt to balance fluid in the body
        • control blood pressure
        • help make red blood cells and strong bones
        • work on osmotic gradient
      • allows patients with kidney failure to live productive lives
      • patients have to choose the type of dialysis that best match heir needs
    • Haemodialysis
      • shunt in forearm vein with bridge to artery
      • shunt connected to dialysis machine
      • osmosis
        • move from high concentration to low concentration through semi-permeable membrane
      • fluid drip
      • in the machine, blood cells and protein are kept and toxins are removed
        • constantly drawing waste out
          • concentration gradient
      • clean blood goes back into artery
      • blood constantly flowing through machine
      • more common
      • go to unit 3 times a week
      • 2 1/2 to 4 1/2 hours
      • blood pressure checked during procedure and machine altered
    • Peritoneal
      • peg in peritoneal sack
      • blood is purified inside body using peritoneum
        • natural cavity
      • abdomen filled with diasylate (dialysis fluid) via catheter
        • lower concentration than blood
      • osmosis
        • around 50% of toxins in blood move in to fluid until concentration gradients are the same
      • fluid removes water and toxins from blood through peritoneum
        • goes back into the bag
      • dirty fluid drained out and replaced by new clean fluid
      • not as effective as haemodialysis

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