Blood Specimens | 合法醫療器材資訊網

SampleCollectionforCoagulationTesting.1.CollectionTube.Bloodshouldbecollectedinablue-toptubecontaining3.2%bufferedsodiumcitrate.

1. Collection Tube. Blood should be collected in a blue-top tube containing 3.2% buffered sodium citrate.

Note: Please examine specimen collection and transportation supplies to be sure they do not include expired containers[1].

2. High Hematocrit Samples. Patients with elevated hematocrits have a relatively low amount of plasma for a given whole blood (collection) volume. This tends to increase the plasma citrate concentration effectively. If the patient has a known hematocrit >55%, the amount of citrate in the collection tube must be decreased according to the formula below.

The equation in CLSI H21 is as follows:

C = (1.85 x 10−3) (100−Hct) (Vblood)

Where:

C is the volume of citrate remaining in the tube.

Hct is the patients hem...