Synonyms
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Allscripts (AEHR) Order Name
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Activated Protein C Resistance Assay.
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Sunrise Clinical Manager (SCM) Order Name
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Activated Protein C Resistance Assay
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EPIC Order Name
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Activated Protein C (APC) Resistance
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Clinical Info
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Specimen Type
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Blood
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Container
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Blue Top Tube
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Collection Instructions
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Container/Tube: Light blue-top (3.2% sodium citrate) tube and a lavender-top (EDTA) tube
Specimen: Full tubes
Transport Temperature: Lavender top tube- Room Temperature and follow collection instructions for light blue top tube.
Collection Instructions:
Note:
If the light blue top tube is the only tube to be drawn and will be collected using a butterfly set, a “discard” tube (either a plain[non-additive] or light blue) must be partially drawn just to completely fill the collection tubing with blood before collecting the light blue top for testing. Failure to perform this step will result in an under-filled tube that the laboratory will reject. Allow blood to fill the tube completely to the line on the tube. The ratio of blood to anticoagulant is critical in coagulation testing and at least a 90% fill is required. Immediately mix the specimen by gently inverting the tube 4-6 times to completely mix with the anticoagulant. Failure to perform this can result in a clotted sample, which is unacceptable for testing1. If there is a delay in transport, spin down, spin plasma again, and send citrate platelet-poor plasma and whole blood. Freeze if there is a delay in transport Double-centrifuged specimens are critical for accurate results as platelet contamination may cause spurious results. Consent form required for molecular genetic testing (Factor V Leiden). Abnormal ratios will reflex to the performance of Factor V Leiden.
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Transport Instructions
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Lavender top tube- Room Temperature and follow collection instructions for light blue top tube.
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Specimen Stability
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Methodology
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Clottable APTT-Based
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Days Performed
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1 - 2 times per week
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Performing Laboratory
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Northwell Health Laboratories
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CPT
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85307
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PDM
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5600054
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Result Interpretation
>= 2.20 Ratio
Note : Reference Range updated 7/6/2023
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Forms
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