- APTPT
Activated Partial Thromboplastin Time (aPTT)
Specimen:
Test Code
APTPT
Specimen Name
Activated Partial Thromboplastin Time (aPTT)
Collect
Sodium Citrate Plasma
Submit
1 mL (Min. 0.5 mL) plasma, Frozen.
Special Handling
Tube MUST be filled to the line on the tube. DO NOT overfill or underfill.
If specimen cannot be tested within 4 hours, Sodium Citrate tubes must be spun, separated and plasma frozen.
If specimen cannot be tested within 4 hours, Sodium Citrate tubes must be spun, separated and plasma frozen.
Rejection Criteria
Clotted Specimen
Grossly Hemolyzed Samples
Collection tubes not properly filled
Grossly Hemolyzed Samples
Collection tubes not properly filled
Stability
Plasma: Ambient 4 hours. Refrigerated unacceptable. Frozen 2 weeks. Whole Blood: Ambient 4 hours.
Methodology
Mechanical Clot Detection
Performed
Performed Monday through Friday
Reported
1-3 days
CPT Codes
- 85730
Components
—
Additional Information
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.
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It is preferable to locate tests on the website and not rely on printed test information, which may soon be out of date.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.
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Test Information
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Common Test Phrases
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Common Lab Definitions
- Serum
- Plasma
- STT