Involves
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Involves
shunting the patient’s blood from the body through a machine in which diffusion, osmosis and ultrafiltration occur and back into the patient’s circulation
Access
to patient’s blood Requirements to transport the blood to and from the dialyzer Dialyzer where exchange of fluid, electrolytes and waste products occur
A. External Arterio-venous cannula or shunt Teflon cannla tips are placed in an artery (usually radial / posterior tibial ) and nearby vein. These cannula tips are connected by a silicone rubber tubing and a teflon bridge to complete the sunt. It has 9 months life span due to clotting and infection
B. Internal arterio-venous fistula
Anastomosing an artery directly to a veoin (usually radial artery and cephalic vein at the wrist) Blood is shunted from the artery to the vein causing the vein to enlarge (ripening) after a few weeks. Average life is 4 years; circumvented problems of infection, clotting and possible hemorrhage Disadvantages are painful venipuncture, formation of aneurysms, achieving hemostasis post dialysis and ischemia of the hand.
A hemodialysis unit's dialysate solution tanks
Hemodialysis
machine
shunting the patient’s blood from the body through a machine in which diffusion, osmosis and ultrafiltration occur and back into the patient’s circulation
Access
to patient’s blood Requirements to transport the blood to and from the dialyzer Dialyzer where exchange of fluid, electrolytes and waste products occur
A. External Arterio-venous cannula or shunt Teflon cannla tips are placed in an artery (usually radial / posterior tibial ) and nearby vein. These cannula tips are connected by a silicone rubber tubing and a teflon bridge to complete the sunt. It has 9 months life span due to clotting and infection
B. Internal arterio-venous fistula
Anastomosing an artery directly to a veoin (usually radial artery and cephalic vein at the wrist) Blood is shunted from the artery to the vein causing the vein to enlarge (ripening) after a few weeks. Average life is 4 years; circumvented problems of infection, clotting and possible hemorrhage Disadvantages are painful venipuncture, formation of aneurysms, achieving hemostasis post dialysis and ischemia of the hand.
A hemodialysis unit's dialysate solution tanks
Hemodialysis
machine
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