Activated Partial Thromboplastin Time (APTT), Plasma

Additional Info: This is a screening test for deficiencies of plasma coagulation factors other than Factors VII and XIII. This test is also used to monitor patients on heparin therapy.

Methodology: Immunological- ACL TOP550

Stat: Available STAT

Specimen Requirements:
1 blue-top (citrate) tube (minimum: the remaining platelet poor plasma separated from 2.7 mL whole blood). Centrifuge blue-top soon after collection. Separate plasma and FREEZE immediately. Send specimen frozen in plastic vial.

Refrigerated specimen is acceptable if delivered to MMC lab and analyzed within 2 hours.

It is preferable to keep the time of draws consistent.
If using a butterfly collection set, fill a 1mL waste tube prior to blue-top. This ensures full blood volume in blue-top.
Tube must be filled to capacity.

Analytical Time:
1 day

Days Set Up: Monday through Sunday

CPT Information:
85730 –

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