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HelpTest Code PTIM Prothrombin Time
Additional Codes
| Epic ID | LAB320 |
Specimen Requirements
Collect 1.0 ml citrated plasma (blue top tube). Allow tube to fill to vacuum in order to maintain proper ratio of blood to anticoagulant (9:1) [4.5 ml blood: 0.5 ml anticoagulant]. Centrifuge and transfer plasma to plastic tube.
Stability/Transport
| Temperature | Stability | Preferred Transport |
| Room Temp | 24 hours (whole blood, unopened spun or unspun tube) | X |
| Refrigerated | 24 hours (whole blood, unopened spun or unspun tube) | |
| Frozen | 2 weeks (processed plasma) |
Performing Lab
Allen Hospital Laboratory
Marshalltown Hospital Laboratory
Day(s) Performed
Daily
Report Available
30 minutes
Reference Ranges
Allen:
PT: 12.3-14.8 s
INR: 0.8-1.2 Critical: >5.0
Marshalltown:
PT: 12.2-15.1 s
INR: 0.8-1.2 Critical >5.0
CPT Code Information
85610