Test Summary

PT or Prothrombin Time Screening test useful in those patients with high risk to predict post op hemorrhage. The Prothrombin Time (PT) in conjunction with the INR is used to monitor oral anticoagulants such as coumadin. Additional uses for PT testing in patients where acquired multiple deficiencies may be suspected. Such disorders may include DIC, liver disease, renal disease and severe malabsorption. Activated Partial Thromboplastin Time (aPTT) is a common screening assay to detect inherited or acquired factor deficiencies or the presence of inhibitors.

Aliases

Specimen Collection

Special Instructions

Preferred Specimen

Minimum Volume

Instructions

Use standard venipuncture and disposal techniques.

Collect the required quantity of Sodium Citrate (light blue top) tubes.

If unable to process specimens within 4 hours of collection then call CompuNet transportation for a STAT pick-up at (937) 297-8262 option 1.
Sodium Citrate (light blue top) tube(s): Process immediately (stable only 4 hours), following instructions below:
Note: We recommend aliquot tubes to be made of polypropylene plastic as this material is safe to freeze at <-70 degrees C.
1. Centrifuge capped Sodium Citrate (light blue top) tubes at 3000 rpm for 10 minutes, or at speed and time required to consistently produce Platelet Poor Plasma (<5/kmm3).
2. Carefully remove the plasma from all Sodium Citrate (light blue top) tubes; avoid disturbing the WBC/buffy coat.
Note: If the plasma shows any hemolysis, it must be recollected.
3. Aliquot at least 1mL of plasma into each aliquot tubes labeled “plasma.” Refer to the Minimum Volume section above for the number of aliquots required per test.
4. Finally, place all aliquots into a <-20°C freezer within 4 hours.
Note: Aliquots must remain frozen until they are picked up by the CompuNet courier. Call CompuNet transportation department if frozen specimen boxes are needed.

Patient Preparation

Storage

Transport Temperature

Specimen Stability

Limitations

Other Acceptable Specimens

Unacceptable Specimens

Order Code

EPIC (Premier) Code

Includes

CPT Code

Billing Code

CPT Statement

Methodology

FDA Status

Physician Attestation of Informed Consent

Testing Laboratory

Department

Reference Range

Setup Schedule / Expected Turnaround Time