If a sodium citrate sample for coagulation is noted to be filled an inch below the fill line, then the specimen is considered unacceptable for coagulation studies. It alters the properties of blood.
Blood coagulation (clotting) is a natural process by which blood cells form a gel known as a blood clot.
The blood clot generates a protective barrier against the entry of harmful substances inside the body.
Sodium citrate can be used in coagulation studies because blood factors V and VIII are relatively more stable in media that contain this substance.
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