Blood Coagulation: How Blood is Stored in Banks & Hospitals

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Blood can clot without exposure to air, raising questions about how it is stored in blood banks and hospitals. To prevent clotting, donation bags are treated with anticoagulant coatings. Additionally, stored blood is frequently separated into components, allowing platelets, which are key to clotting, to be extracted and used separately from red blood cells. This process ensures the safe storage and effective use of blood products in medical settings.
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According to theory, blood may even clot without coming into contact with air,then how do the store blood in blood banks or in hospitals?
 
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The donation bags have anti-coagulent coatings.
The stored blood is often separated so the platelets (the main clotting factor) is extracted for use separately than the red blood.
 

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