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HelpTest Code PF Scr Platelet Function Screen
Useful For
The Collagen/Epinephrine (COL/EPI) cartridge is the primary cartridge used to detect platelet dysfunction induced by intrinsic platelet defects, von Willebrand disease or exposure to platelet inhibiting agents. The Collagen/ADP (COL/ADP)
cartridge is used to indicate if abnormal results may have been caused by the effect of ASA (Acetylsalicylic acid or aspirin) or medications containing ASA.
Patient Preparation
No special patient preparation required
Special Collection Instructions
Specimen must be collected using a 21ga or larger needle.
Do not spin the sample
Properly filled 9:1 ratio (blood to anticoagulant); 3.2% NaCitrate tube
Collection Method
Venous Draw; properly filled 9:1 ratio (blood to anticoagulant)
Minimum Volume
0.5 ml of plasma from a properly filled 1.8 mL or 2.7 mL NaCitrate (light blue) tube
Container
Light Blue Sodium Citrate
Preferred Specimen
2.7mL Lt. Blue (3.2% NaCitrate)
Acceptable Specimens
1.8 mL Lt. Blue (3.2% NaCitrate) tube
Reference or Target Ranges
COL/EPI Closure Time: 71-171 seconds
COL/ADP Closure Time: 55-115 seconds
Reportable Units
Seconds
Critical Value
Not defined for this assay
Reasons for Rejection
| Hemolysis Threshold | N/A |
| Icterus Threshold | N/A |
| Lipemia Threshold | N/A |
| Interfering Subtances/Other | Short draws, over draws, clotted, improperly labeled, hemolyzed, lipemic or icteric samples, samples > 4 hours from collection |
Specimen Stability
| Ambient | 4 hours |
| Refrigerated (4°C to 8°C) | N/A |
| Frozen(-70°C to -20°C) | N/A |
Performance Information
| Days and Time Performed | 24/7 |
| Expected Turn Around Time | Within 2 hours on arrival to lab |
| Stat Availability | No |
| Performing Bench | Coagulation |
| Methodology/Method Description | PFA-100 – The single use PFA-100 test cartridge consists of a number of integrated parts including a capillary, a sample reservoir and a biochemically active member with a central aperature. |
Special Handling
The sample is tested as a whole blood sample, please thoroughly mix sample
prior to testing by inverting gently several times. DO NOT SPIN THE SAMPLE.
If the specimen has been spun, it must be redrawn.
Additional Information/Important Notes
DO NOT SPIN THE SAMPLE. Spun samples are rejected and must be redrawn.
CPT Codes
85576 x2
Panel Components
- COL/ EPI
- COL/ADP