PARTIAL THROMBOPLASTIN TIME
| Synonyms: | PTT; APTT |
| Computer Code: | |
| Specimen Collection: | 2.7 mL (blue top tube) 90% full |
| Minimum Volume: | 1.8 mL (blue top tube) 90% full |
| Handling Instructions for Offsite Areas: | Maintain at room temperature. If specimen cannot be transported within 2 hours, centrifuge at 3,000 rpm for 20 minutes. Using a plastic pipette, transfer plasma to plastic tube and freeze plasma. |
| Reference Values: | 25.0-38.0 seconds |
| Lab Code: | Hematology |
| Requisition: | C/H |
| Test Frequency: | Daily |
| Routine TAT: | NA |
| Stat TAT: | 60 min |
| CPT Code(s): | 85730 |
| LCD or NCD: | |
| Methodology Used: |
See Addendum XVII |