Updated Test
Effective Date
None Selected
Included in Report
Updated Test
Updated Test
Notes
Update to specimen requirements, stability, rejection criteria and LOINC codes.
Patient Preparation: Patient should not be receiving anticoagulant treatment (eg, warfarin, heparin).
Collect: Light blue 3.2 % sodium citrate
Specimen Preparation: For complete instructions, see Coagulation Test Collection Guide found under Resources/Interpretation Guides and Forms. Send 3.0 mL platelet-poor plasma in a screw capped plastic vial. CRITICAL FROZEN.
Rejection Criteria: Refrigerated, thawed, refrozen specimens, serum.
Stability:
Room temperature: 4 hours
Refrigerated: Unacceptable
Frozen: 30 days
LOINC Codes:
| Result Code | Name | LOINC Code | AOE/Prompt |
| 2500820 | APTT | 34571-0 | No |
| 2500825 | APTT 1:1 Mix | 33930-9 | No |
| 2500830 | Hexagonal Phase Neutralization | 3282-1 | No |
| 2500840 | Dilute Russell Viper Venom | 6303-8 | No |
| 2500845 | Drvvt 1:1 Mix | 75513-2 | No |
| 2500852 | Drvvt Confirmation | 7838-5 | No |
| 2500855 | Interpretation | 3281-3 | No |
Test Details
Mnemonic
LUPAC
Ordering Code
2500780
CPT-4 Codes(s)
85613 (dRVVT Screen), 85730 (PTT screen), plus 85613 (dRVVT 1:1 Mix) and/or 85613 (dRVVT confirm) and/or 85598 (Hexagonal Phospholipid neutralization) and/or 85732 (PTT1:1 Mix) as appropriate, at additional cost