Laboratory Test Detail

Last Updated: October 1, 2022 @ 9:13 am

3505

Partial Thromboplastin Time

Specimen:Collect:
  • One Blue Top (Na Citrate)

Also Acceptable:
  • One Standard Transport Tube
Submit:
  • 1 mL (Min:0.5 mL) Plasma . Submit Frozen. Submit in a Standard Transport Tube.
Special Handling:
  • If patient is on Heparin Therapy separate plasma from cells within 1 hr, plasma is stable for 2 hrs ambient.
    Patients that are on therapeutic coagulation drugs, including but not limited to Rivaroxaban, Apixaban, Edoxaban, Dabigatron, Vit K antagonists, and Unfractionated Heparin, are known to cause interference with testing. Discontinue drugs for a minimum of 24 hours prior to any aPTT testing.
Rejection Criteria:
  • Clotted Specimen
  • Grossly Hemolyzed Samples
  • Collection tubes not properly filled
Stability:Ambient: 4 Hour(s); Refrigerated: Unacceptable; Frozen: 2 Week(s); Incubated: Unacceptable
Methodology:
  • Mechanical Clot Detection
Performed:Mon-Fri
Reported:1-3 Day(s)
CPT Codes:
  • 85730
Interpretive Data:General Reference Range : 22.9-41.3 sec
Components:
  • 3505 - PTT
Print Friendly, PDF & Email

Disclaimer:
It is preferable to locate tests on the website and not rely on printed test information, which may soon be out of date.
Updated test information can only be guaranteed by using this website.