Specialties

  • Specimen Collection

  • The accuracy of laboratory testing depends on the quality of the specimen submitted. Proper specimen collection, identification, and transport determine the accuracy and utility of the test results.

    Please consult the test catalog for information about collection and handling of specimens. If there are any questions, please call the PSF Laboratory at 877.436.5066 to clarify the specimen requirements. To help with specimen identification, PSF Laboratory requisitions have pre-numbered specimen labels.

    Specimen Collection Tubes Available

    The following is a list of tubes referred to in the PSF specimen requirements:

    •Green-Top Tube (Sodium Heparin): This tube contains sodium heparin - used for the collection of heparinized plasma or whole blood for special tests.
    Note: After the tube has been filled with blood, immediately invert the tube several times in order to prevent coagulation.

    •Grey-Top Tube (Potassium Oxalate/Sodium Fluoride): This tube contains potassium oxalate as an anticoagulant and sodium fluoride as a preservative - used to preserve glucose in whole blood and for some special chemistry tests.
    Note: After the tube has been filled with blood, immediately invert the tube several times in order to prevent coagulation.

    •Lavender-Top Tube (EDTA): This tube contains EDTA as an anticoagulant - used for most hematological procedures.
    Note: After the tube has been filled with blood, immediately invert the tube several times in order to prevent coagulation.

    •Light Blue-Top Tube (Sodium Citrate 3.2%): This tube contains sodium citrate as an anticoagulant - used for drawing blood for coagulation studies.
    Note: It is imperative that the tube be completely filled.The ratio of blood to anticoagulant is critical for valid prothrombin time results.Immediately after draw, invert the tube 6-10 times in order to activate the anticoagulant.

    •Light Green-Top Tube (Lithium Heparin): This tube contains lithium heparin and plasma gel separator - used for the collection of heparinized plasma or whole blood for chemistry tests.
    Note: After the tube has been filled with blood, immediately invert the tube several times in order to prevent coagulation.

    •Red-Top Tube: This tube is a plain VACUTAINER® containing no anticoagulant - used for collection of serum for selected chemistry tests as well as clotted blood for immunohematology and therapeutic drug monitoring.

    •Royal Blue-Top Tube: There are 2 types of royal blue-top Monoject® tubes - 1 with the anticoagulant EDTA and the other plain.These are used in the collection of whole blood or serum for trace element analysis.Refer to the individual metals in the individual test listings to determine the tube type necessary.

    •Serum Separator Tube: This tube contains a clot activator and serum gel separator - used for various laboratory tests.
    Note: Invert the tube to activate the clotting; let stand for 20-30 minutes before centrifuging for 10 minutes.If frozen serum is required, pour off serum into plastic vial and freeze.Do not freeze VACUTAINER(S)®.

    •Special Collection Tubes: Some tests require specific tubes for proper analysis.Please contact SVI prior to patient draw to obtain the correct tubes for metal analysis or other tests as identified in the individual test listings.

    •Yellow-Top tube (ACD): This tube contains ACD - used for the drawing whole blood for special tests.

     

     

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