Sodium Citrate Tubes Versus CTAD

In today's laboratory, we strive to take as little blood from a patient as possible and also trying to decrease our costs. In current Sodium Citrate tubes the stability time is only 1 hour from collection to running, unless you remove the plasma, which will allow stability for 2 hours. The CTAD tube would give a 4 hour stability time on the Anti-factor Xa test. But could it be used for our other coagulation testing, such as Protimes, APTT, Fibrinogen and D Dimer?

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The CTAD Tube Dilemma

Source: Advance