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HelpTest Code EXTEM Thromboelastometry, EXTEM and FIBTEM
Additional Codes
| Epic Ordering Code | LAB3041316 |
| NBS code | LBC12073 |
| Service code | 12509 |
Specimen Requirements
Submit the following:
| Preferred: |
| Light Blue Top |
|
|
Processing Requirements
Specimen Type: Whole Blood
Container/Tube: 1 Light Blue Top (3.2% Sodium Citrate)
Volume: 2.7 mL Whole Blood (Tubes must be full)
Collection Instructions: Hand deliver whole blood specimen to laboratory immediately. Do NOT send whole blood specimen via pneumatic tube.
Specimen Stability
| Specimen Type | Whole Blood |
|---|---|
| Ambient | 4 hours (preferred) |
| Refrigerate | Not available |
| Frozen | Not available |
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others: Clotted or insufficient specimen | Reject |
Methodology
Viscoelastic
Days and Times Performed
24 hrs, TAT 2 hrs
Reference Interval
| Parameters | Reference Interval for Adults | Units |
|---|---|---|
| EXTEM, CT | 53 – 80 | sec |
| EXTEM, CFT | 59 – 128 | sec |
| EXTEM, Alpha Angle | 65 – 78 | Degree (°) |
| EXTEM, A5 | 35 – 54 | mm |
| EXTEM, A10 | 45 – 63 | mm |
| EXTEM, A20 | 52 – 68 | mm |
| EXTEM, A30 | Not available | mm |
| EXTEM, MCF | 54 – 70 | mm |
| EXTEM, LI30 | 99 – 100 | % |
| EXTEM, LI45 | Not available | % |
| EXTEM, LI60 | Not available | % |
| EXTEM, ML | 2 – 16 | % |
| FIBTEM, CT | 50 – 80 | sec |
| FIBTEM, CFT | Not available | sec |
| FIBTEM, Alpha Angle | 56 – 77 | Degree (°) |
| FIBTEM, A5 | 9 – 21 | mm |
| FIBTEM, A10 | 9 – 23 | mm |
| FIBTEM, A20 | 10 – 24 | mm |
| FIBTEM, A30 | Not available | mm |
| FIBTEM, MCF | 10 – 24 | mm |
| FIBTEM, LI30 | 98 – 100 | % |
| FIBTEM, LI45 | Not available | % |
| FIBTEM, LI60 | Not available | % |
| FIBTEM, ML | 0 – 10 | % |
Testing Laboratory
National University Hospital
Haematology, 67725320
Useful For
Assessment of the extrinsic coagulation pathway and fibrinogen level
Update
Last updated 22/06/2026
LOINC Code Information
| EXTEM, COAGULATION TIME(CT) | 52773-9 |
|---|---|
| EXTEM, CLOT FORMATION TIME(CFT) | 52770-5 |
| EXTEM, MAXIMUM CLOT FIRMNESS(MCF) | 52783-8 |
| EXTEM, MAXIMUM LYSIS(ML) | 52786-1 |
| FIBTEM, MAXIMUM CLOT FIRMNESS(MCF) | 52780-4 |
Alias
Rotem