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HelpROTEM thromboelastometry
Collection Requirements
Source: blood
Container: Sodium citrate light blue
Volume: filled to line
- Preferred: 2.7 mL vacutainer
- Acceptable: 1.8 mL vacutainer
Special Instructions
Must be delivered to the Lab within 60 minutes of collection
Turn Around Time
1 hour
Availability
STAT
Includes
Intem, Extem, Fibtem, Aptem, and/or Heptem
Algorithm
Combination is based on the timepoint (Cardiac baseline/warming or post protamine) or ECMO status
Lab Processing Instructions
Specimen: whole blood
Room temperature
Performing Laboratory
Adele Hall
Adele Hall Lab Section
Core
Instrumentation/Methodology
ROTEM delta
Additional Information
The rotational thromboelastometry (ROTEM) test is a blood test used to assess whole blood hemostasis. It's used to diagnose and treat bleeding from a variety of causes, and to monitor blood clotting during and after surgery. A graph is uploaded to the patient chart upon completion of testing. Viewing is also available via GemWeb Live.
Reference Ranges
>21 years old. No pediatric reference ranges are available.
| Test | CT (s) | CFT (s) | Angle | A10 (mm) | A20 (mm) | MCF (mm) |
|---|---|---|---|---|---|---|
| INTEM | 122-208 | 45-110 | 70-81 | 40-60 | 51-72 | 51-72 |
| HEPTEM | HEPTEM should be compared to INTEM as it is a heparin inhibitor | |||||
| EXTEM | 43-82 | 48-127 | 65-80 | 40-60 | 50-70 | 52-70 |
| APTEM | APTEM should be compared to EXTEM in order to obtain evidence of fibrinolytic activity | |||||
| FIBTEM | 7-24 | 7-24 | 7-24 | |||