3.6.3
Samples
Analyze whole blood samples within 60 minutes of collection.
Fill the lithium heparin specimen collection tube at least half-way to ensure the sample
does not have a high concentration of anticoagulant.
To prevent hemolysis, do not refrigerate or shake whole blood samples.
When adding blood to evacuated collection tubes, remove the needle from the syringe
and the stopper from the tube, and gently place the sample into the tube. (If sample is
injected through the stopper, hemolysis may occur.)
CAUTION:
Do not remove a sample from the disc and then try to reintroduce it into the disc.
Note:
Always fill evacuated collection tubes in this order:
1. Light blue top: Sodium citrate. Used for coagulation determinations.
2. Gold top: SST tube with clot activator.
3. Red top: Serum only, no anticoagulant.
4. Green top: Lithium heparin. Anticoagulant for chemistry only.
5. Lavender top: EDTA. Anticoagulant for hematology only.
Testing and Results
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