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HelpTest Code DD D-DIMER
Additional Codes
N.DIMER
Methodology
Automated Coag Analyzer
Specimen Requirements
Plasma
Container/Tube: Blue Top (buffered sodium citrate)
Specimen Volume: Fill tube to appropriate line, no minimum
Collection:
- Specimen may be sent centrifuged (centrifuge specimens for 10 minutes at 3500 rpm) or un-centrifuged with plasma remaining on top of cells in an unopened tube, kept at ROOM TEMPERATURE 20±5° Celsius for no longer than 8 hours.
- If testing cannot be performed within 8 hours, platelet-poor plasma should be removed from the cells and frozen at -20 Celsius for up to 1 month or at -70 Celsius for up to 12 months.
- Properly label tube with patients name, DOB, requisition number and if plasma has been separated: type of tube sample drawn from. i.e. BLUE.
Specimen Transport/Stability
Room Temperature- 8 hours
Frozen - (-20 Celsius) 1 month if platelet poor plasma has been separated from cells.
Frozen - (-70 Celsius) 12 months if platelet poor plasma has been separated from cells.
Specimen Rejection
Unacceptable:
- Clotted
- Hemolyzed
- Exceeded stability requirements
- Under or overfilled tube
- Unlabeled specimen
- Greater than 8 hours room temperature
Maximum Laboratory Time
24 hours
Reference Ranges
| Dimer | Less than 494 ng/mL FEU |
CRITICAL VALUE: REFER TO LH-W CRITICAL VALUES POLICY
Day(s) Test Set Up
Daily
Test Classification and CPT Coding
85379