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BD Vacutainer® Citrate Blood Collection Tubes FAQ
Q.
How long should the tourniquet be left on for drawing coagulation specimens?
A.
Remove tourniquet as soon as blood appears in tube as leaving the tourniquet in place can lead to changes in the concentration of clotting factors in the plasma as well as platelet activation which can result in erroneous coagulation results.
Q.
Can the sodium citrate tube be used when a patient exhibits platelet clumping in an EDTA tube?
A.
Yes, the sodium citrate tube can be used to get an accurate platelet count if a patient’s platelets clump in the EDTA tube. The platelet count from the sodium citrate tube should be multiplied by 1.1 to account for the different blood to additive ratio in the citrate tube.
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