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EXTEM-Viscoelastic Clot Assessment
Test CodeEXTEM
Alias/See Also
Rotem
CPT Codes
85396
Preferred Specimen
Citrate (BLU)
Instructions
Collect whole blood in 3.2% buffered sodium citrate (9:1 blood to sodium citrate). Venipuncture must be atraumatic
Specimen Stability
Mix specimen well (minimum 10 times) and test within 4 hours of collection. Do Not Centrifuge
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Reject hemolyzed, clotted, overfilled, or short draw (<90%) samples.
Reject specimens for patients less than one year of age.
Methodology
Rotem Delta Thromboelastometry
Setup Schedule
24x7
Report Available
Use ROTEM VIEWER to view test progress in real time.
Result values available as soon as testing is completed.
Full report and graphs available in EPIC MEDIA Tab.
Result values available as soon as testing is completed.
Full report and graphs available in EPIC MEDIA Tab.
Reference Range
| Test | Reference Range | Critical |
| CT | 37-78 s | |
| CFT | 55-144 s | |
| Alpha Angle | 67-80 deg | |
| A10 | 46-67 mm | <40 |
| A20 | 51-73 mm | |
| MCF | 53-74 mm | |
| LI30 | >93% |
Clinical Significance
The EXTEM assay is a semi-quantitative in vitro diagnostic assay on the ROTEM® delta Thromboelastometry System to monitor the coagulation process via the extrinsic pathway in citrated whole blood specimens.
Performing Laboratory
CRMC Laboratory
CCMC Laboratory
