PT tube is used for blood coagulation test and applicable to fibrinolytic
system(PT,TT, APTT and fibrinogen, etc. ). The mixing ratio is 1 part citrate
to 9 parts blood.Accurate ratio can guarantee effectiveness of the testing
result and avoid misdiagnosis. As the sodium citrate has very little
toxicity, it is also used for blood storage.Do draw sucient blood volume
to ensure accurate testing result. PT tube with double-deck is with little
dead space, Which can be used to monitor the test of vWF, FⅧ,platelet functions, Heparin therapy.