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HelpTest Code PTT Partial Thromboplastin Time (PTT)
Additional Codes
| Epic ID | LAB325 |
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.
When monitoring heparin therapy and heparin is given every 4 hours, blood should be collected 3 hours after dose.
Stability/Transport
| Temperature | Stability | Preferred Transport |
| Room Temp | 4 hours | X |
| Frozen | 2 weeks (processed plasma) |
Performing Lab
Allen Hospital Laboratory
Marshalltown Hospital Laboratory
Day(s) Performed
Daily
Report Available
45 minutes
Reference Ranges
Allen:
21.0-37.0 seconds
Critical: >120.0 seconds
Marshalltown:
21.0-37.0 seconds
Critical: >150.0 seconds
CPT Code Information
85730