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the same composition as that of plasma except the nitrogenous wastes (urea).
(iv) Pores of the cellophane tube allow the passage of molecules based on concentration
gradient. Nitrogenous wastes like urea, uric acid, creatinine,excess salts and excess H+ ions
easily get diffuse from the blood into the surrounding solution. Thus, the blood is cleared of
nitrogenous waste products without loosing plasma proteins.
(v) The blood thus, purified, is warmed to body temperature, checked to ensure that it is
isotopic to the patients blood. Now, the blood is mixed with an anti-heparin to restore its
normal clotting power and then pumped back to the body of patient through a vein, usually
the radial vein.
Kidney (Rena!) Transplantation
Grafting a kidney from a compatible donor to restore kidney functions in a recipient
suffering from kidney failure is called renal or kidney transplantation. It is an ultimate
method in the correction of acute renal failures.
A living donor can be used in a kidney transplant. It may be an identical twin, a sibling or a
close relative to minimize the chances of rejection by the immune system of the host. To
prevent the rejection of transplanted kidney, special drugs are also used, which suppress
the recipients immune system.