blue top tube

A 5-ml tube with sodium citrate as an anticoagulant, used to collect specimens for coagulation factor assays, fibrinogen, glucose-6-phosphate dehydrogenase, PTT, PT, thrombin time

blue top tube

Clinical chemistry A 5 ml tube with sodium citrate as an anticoagulant, used to collect specimens for coagulation factor assays, fibrinogen, glucose-6-phosphate dehydrogenase, PTT, PT, thrombin time
References in periodicals archive ?
The blue top tube prevents clotting with a different chemical that has less effect on platelets.
Is a royal blue top tube used for trace metals and drug testing?