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HelpTest ID APCRR Activated Protein C Resistance V, with Reflex to Factor V Leiden, Blood and Plasma
Useful For
Evaluation of patients with incident or recurrent venous thromboembolism (VTE)
Evaluation of individuals with a family history of VTE
Profile Information
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| APCRV | Activated Protein Resistance V, P | Yes | Yes |
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| F5DNA | Factor V Leiden (R506Q) Mutation, B | Yes | No |
| F5DNI | APCRV/F5DNA Summary Interpretation | No | No |
Testing Algorithm
If the assay ratio is abnormal, then R506Q mutation analysis will be performed at an additional charge.
When the activated protein C resistance V is abnormal or indeterminate and R506Q mutation assay is reflexed, then a summary interpretation will be provided.
Special Instructions
Method Name
Optical Clot-Based
Reporting Name
APCRV, w/Reflex, PSpecimen Type
Plasma Na CitWhole blood
Necessary Information
If priority specimen, mark request form, give reason, and request a call-back.
Specimen Required
See Coagulation Studies in Special Instructions: Guidelines for Specimen Handling and Processing.
Blood and plasma are required.
Specimen Type: Whole blood
Container/Tube:
Preferred: Yellow top (ACD)
Acceptable: Lavender top (EDTA) or light-blue top (3.2% sodium citrate)
Specimen Volume: Full tube
Collection Instructions:
1. Invert several times to mix blood.
2. Send specimen in original tube.
Additional Information: Each molecular coagulation test requested must have its own tube.
Specimen Type: Platelet-poor plasma
Patient Preparation: Fasting preferred
Collection Container/Tube: Light-blue top (3.2% sodium citrate)
Submission Container/Tube: Polypropylene vial
Specimen Volume: 1 mL
Collection Instructions:
1. Within 4 hours of collection, centrifuge, transfer all plasma into a plastic vial, and centrifuge plasma again. Aliquot plasma into separate plastic vial leaving 0.25 mL in the bottom of centrifuged vial.
2. Freeze plasma aliquot immediately at -20° C, or, ideally ≤-40 degrees C.
Additional Information:
1. Double-centrifuged specimen is critical for accurate results as platelet contamination may cause spurious results.
2. Each coagulation assay requested should have its own vial.
Specimen Minimum Volume
Plasma: 0.5 mL
Whole Blood: 3 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Plasma Na Cit | Frozen | 14 days | |
| Whole blood | Ambient (preferred) | 7 days | |
| Frozen | 14 days | ||
| Refrigerated | 14 days |
Reference Values
APCRV RATIO
≥2.3
Pediatric reference range has neither been established nor is available in scientific literature. The adult reference range likely would be applicable to children older than 6 months.
Day(s) and Time(s) Performed
Monday through Friday
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
85307
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| APCRR | APCRV, w/Reflex, P | 13590-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| APCR | APCRV Ratio | 13590-5 |
| INT55 | Interpretation | 48591-2 |
NY State Approved
YesForms
1. New York Clients-Informed consent is required. Document on the request form or electronic order that a copy is on file. The following documents are available in Special Instructions:
-Informed Consent for Genetic Testing (T576)
-Informed Consent for Genetic Testing-Spanish (T826)
2. Coagulation Patient Information (T675) in Special Instructions
3. If not ordering electronically, complete, print, and send a Coagulation Test Request (T753) with the specimen.