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HelpTest Code PTTCA PARTIAL THROMBOPLASTIN TIME (PTT), CIRCULATING ANTICOAGULANT, PLASMA
Additional Codes
| Software | Test Code |
|---|---|
| Label Text | PTTCA |
| EPIC | LAB326 |
Performing Laboratory
NorDx Laboratories
Useful For
Aiding in the assessment of an unexplained prolonged partial prothrombin time. An aPTT mixing study has limited value unless an aPTT result is more than 5 seconds above the reference interval within 7 days of testing.
Method Name
Mixing Study performed with normal plasma
Reference Values
An interpretive report will be issued
Profile Information
|
Individual Test Description |
|---|
| FIBRINOGEN, PLASMA |
| PARTIAL THROMBOPLASTIN TIME (PTT), PLASMA |
| PROTHROMBIN TIME (PT), INR, PLASMA |
| PTT CIRCULATING ANTICOAGULANT |
| THROMBIN CLOTTING TIME, PLASMA |
Days and Times Test Performed
1 day weekly. STAT testing available upon request
Report Available
Up to 1 Week
Specimen Type
Plasma
Preferred Container
Light Blue Top Tube (Sodium Citrate) – Tubes must be full at time of collection.
Plasma from a minimum of 2 tubes is required for this test.
Specimen Collection and Handling
Collect specimen as follows:
1. Draw blood in light blue-top (3.2% sodium citrate) tubes. Tubes must be full upon collection.
2. Separate plasma from cells as soon as possible within 4 hours of collection in a centrifuge at 2,500 rpm for 15 minutes or 3,000 rpm for 10 minutes.
3. Using a plastic transfer pipette (do not use a glass pipette) decant the plasma to a screw-capped, plastic (polypropylene) vial. Glass vials will not be accepted.
4. Spin the plasma again at 2,500 rpm for 15 minutes or 3,000 rpm for 10 minutes. Note: Double spinning the specimen ensures platelet poor plasma (<10,000 uL)
5. Divide the plasma into as many 0.5-1.0 mL aliquots as possible and cap the vials tightly.
6. Place tubes upright and flash freeze specimens immediately at ≤ – 20° C or below.
7. Send specimens FROZEN on dry ice.
Click here to view the Procedure for Collecting a Specimen from an A-line
Specimen Stability Information
Specimen Type: Plasma
Room Temp: 4 Hours
Note: Whole blood that remains capped and unspun is stable for up to 4 hours when stored at room temperature (18 – 24°C). Frozen plasma is stable 2 weeks @ -20°C and 12 months @ -70°C. Blue top tubes for coag assays must not be refrigerated or placed on ice.
Add On Capable
Yes
CPT Code Information
|
CPT Code |
CPT Description |
CPT Disclaimer |
|---|---|---|
| 85384 | Fibrinogen, Activity | |
| 85610 | Prothrombin Time | |
| 85732 x4 | Thromboplastin Time, Substitution, Plasma Fractions, Each | |
| 85730 | Thromboplastin Time, Partial (PTT), Plasma or Whole Blood |
Performing Laboratory Location
NorDx Laboratories
Rejection Information
Underfilled (<90%), clotted, high hematocrit (>55%), or grossly hemolyzed
Keywords
MIXING STUDY
Advance Beneficiary Notice Requirements
No ABN Required