If the whole blood or any of the components is deficient blood transfusionis indicated as in case of:
-Acute hemorrhage
-Severe anaemia
-Agranulocytosis
-Thrombocytopenia
-Haemophilia
However,if one element only is deficient it is preferable to give packed red blood cells and human plasma transfusions.
Precautions:
-blood should be compatible assured by cross matching test
-blood should be free from contamination
-blood should be free from blood born diseases
-blood should be fresh (less than 2 weeks storage)
-high haemoglobin content.
Blod is stored at 4* C.
Complications:
The donor may suffer from anaemia in repeated donation and shock in excessive volume donation.
The recipient may suffer from:
-mechanical effect:air or fat embolism.
-infective comploications:hepatitis,AIDS,Malaria.
-physiological complications:overloadingin excessive transfusion leading to heart failure,pyrogenic reaction.
-incompatibility complications:increased blood viscosity leading to heart failure,arrhytmia.
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