Reference Interval:
| Test Number
| Components
| Reference Interval
| | | Prothrombin Time
| 12.0-15.5 seconds
| | | Partial Thromboplastin Time
| 32-48 seconds
| | | Dilute Russell Viper Venom Time (dRVVT)
| 33-44 seconds
| | | Thrombin Time
| 14.7-19.5 seconds
| | | Reptilase Time
| Less than 22.0 seconds
| | | PTT Heparin Neutralized
| 32-48 seconds
| | | Partial Thromboplastin Time 1:1 Mix (performed if PTT > 48 seconds)
| 32-48 seconds
| | | Platelet Neutralization Procedure (performed if PTT 1:1 Mix > 48 seconds)
| Negative
| | | Dilute Russell Viper Venom (dRVVT) 1:1 Mix (performed if dRVVT > 44 seconds)
| 33-44 seconds
| | | Dilute Russell Viper Venom Time (dRVVT) Confirmation Test (performed if dRVVT 1:1 Mix > 44 seconds)
| Negative
| | | Hexagonal Phospholipid Neutralization
| Negative
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| Interpretive Data: |
Please refer to Statement C in the Compliance Statements section in the front of the Laboratory Test Directory.
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| Note: |
If PTT and dRVVT are normal, then no further testing is performed. If PTT is abnormal, Thrombin Time is added. If Thrombin Time is normal, PTT 1:1 mix is added. If Thrombin time is abnormal, Reptilase Time is added. If Reptilase time is abnormal, PTT 1:1 mix is added. If Reptilase Time is normal, PTT Heparin Neutralization is added. If PTT Heparin Neutralization is abnormal, PTT 1:1 mix is added. If PTT 1:1 mix is abnormal, Platelet Neutralization procedure is added. If dRVVT is abnormal, dRVVT 1:1 mix is added. If dRVVT 1:1 mix is abnormal, dRVVT confirmation is added. If Platelet Neutralization procedure and dRVVT confirmation are normal or if one is normal and the other not done, Hexagonal Phospholipid Neutralization is added. Additional charges may apply.
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| CPT Code(s): |
85610 Prothrombin time (PT); 85730 Partial Thromboplastin Time (PTT); 85613 dRVVT. If PTT is abnormal, add 85670 Thrombin Time. If Thrombin time is abnormal, add 85635 Reptilase Time. If Reptilase Time is normal, add PTT Heparin Neutralization 85730 and 85525. If PTT Heparin Neutralization is abnormal, add 85732 PTT 1:1 mix. If PTT 1:1 mix is abnormal, add 85597 Platelet neutralization procedure (PNP). If dRVVT is abnormal, add 85613 dRVVT 1:1 mix. If dRVVT 1:1 mix is abnormal, perform 85613 dRVVT confirmation. If PNP and dRVVT conf are normal, add 85597 Hexagonal Phospholipid Neutralization.
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