Home
HelpTest Code LAB2652 Protime (PT) with INR, Plasma
Additional Codes
| Test Name in EPIC | EPIC Test Code | Mnemonic |
|---|---|---|
| PROTIME | LAB2652 | PT/INR |
Methodology
Electromechanical Clot Detection/Calculated International Normalized Ratio (INR)
Note: Neighborhood and regional sites may have a different LIS test number, contact site for specific ordering information.
Specimen Requirements
Specimen Type: Platelet-poor plasma
Container/Tube:
Fill Blue top tube to the etched line located just below the cap of the tube.
Preferred: Full Light-blue top (3.2% sodium citrate)
Acceptable: Full Sodium citrate (BD® or Greiner tubes)
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL
Collection Instructions:
1. Unacceptable specimens: Specimens that are short-draws, over-draws, clotted or hemolyzed may yield incorrect results.
2. If sending from a site spin down, remove top 2/3 of plasma, and spin plasma again in a polyproyplene (cloudy plastic) vial.
3. Aliquot top 3/4 and place platelet-poor plasma in a polypropylene (cloudy plastic) vial.
4. Glass vials are not acceptable for processing/transport/storage.
Additional Information:
1. Double-centrifuged specimens are critical for accurate results as platelet contamination may cause spurious results.
2. Sites: Send double spun plasma frozen (up to two weeks).
3. If sending sodium citrate whole blood, specimen must be received within 8 hours of draw.
Specimen Transport Temperature
Ambient whole blood or platelet-poor plasma 8 hours
Frozen plasma 2 weeks at -20°C or 12 months at -70°C
Refrigerate NO
Day(s) Test Set Up
Monday through Sunday
Performing Laboratory
Coagulation-
Central Region: St. Joseph's Medical Center Lab
East Region: Ashland Clinic Lab, Deer River Hospital Lab, Duluth Family Medicine Clinic Lab, Hayward Clinic Lab, Hibbing Clinic Lab, Lakeside Clinic Lab, Lakewalk Clinic Lab, Northern Pines Lab, Proctor Clinic Lab, Sandstone Hospital Lab, SMDC Clinical Lab, Spooner Clinic Lab, St. Mary's Hospital - Superior Lab, Virginia Hospital Lab,
West Region: Ada Hospital Lab, Fargo Hospital Lab, Fosston Hospital Lab, Holy Trinity Hospital Lab, St. Mary's - Detroit Lakes Hospital Lab
Test Classification and CPT Coding
85610
Reference Values
Normal range changes every year with lot change of PT reagent. See patient chart copy for current range.