Test Code LAB2602 Activated Partial Thromboplastin Time (APTT), Plasma

Additional Codes

Test Name in EPIC	EPIC Test Code	Soft LIS Ordering Mnemonic
APTT	LAB2602	APTT

Electromechanical Clot Detection

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 (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. Specimen may be held as long as 4 hours before analyzing.

Ambient 4 hours OK/Frozen 2 weeks at -20°C or 12 months at -70°C

Ambient 4 hours OK when patient is not on heparin therapy

Ambient 2 hours OK when patient is on heparin therapy (either Unfractionated (UFH) or Low Molecular Weight (LMW))

Refrigerate NO

Monday through Sunday

Coagulation-

Central Region: St. Joseph's Medical Center Lab

East Region: Deer River Hospital Lab, Northern Pines Lab, SMDC Clinical 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

85730

Normal range changes every year with lot change of PTT reagent. See patient chart copy for current range.