Test Overview
Test Methodology

The Rotem system uses Thromboelastometric analysis to provide a quantitative and qualitative indication of the coagulation state of a blood sample that can detect clot formation and firmness as well as clot lysis.

Test Usage

Coagulation evaluations with the ROTEM® delta are commonly used to assess clinical conditions in organ transplantation, cardiovascular surgery, cardiology procedures and trauma to assess post-operative hemorrhage and/or thrombosis. Up to 4 ROTEM® tests can be selected on the requisition. If more than 4 tests are indicated, additional specimen will be required.

Reference Range *

Interpretive report provided.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations
  • ROTEM viscoelastic testing is not FDA approved for the pediatric population (<21 years of age) and the attached reference ranges pertain to adults only.


  • Patients with hypofibrinogenemia have not been fully evaluated.
  • Dysfibrinogenemic patients were not tested.
    Up to 4 ROTEM® tests can be selected on the requisition.
  • If more than 4 tests are indicated, additional specimen will be required.
Test Details
Days Set Up
Daily, 24 hours
Analytic Time

Typically 30 minutes. Analytic time can be physician determined for individual cases.

Soft Order Code
ROTEM
MiChart Code
Rotem Testing, Initial
Synonyms
  • Extem
  • Fibtem
  • Heptem
Laboratory
Hematopathology
Section
Coagulation
STAT Availability

24 hours daily

Specimen Requirements
Collection Instructions

This test is available only to University of Michigan registered patients.

Special Handling

Specimen must be kept at room temperature and delivered to the Hematology/Coagulation laboratory, Main Hospital, Room 2F471, along with the completed requisition, via walking directly to the lab of via the pneumatic tube system

Contraindications
ROTEM Delta (Core Lab) <b>Arterial blood should not be used. </b> Do not obtain blood from a heparinized access line, lock, or indwelling heparin lock.
Normal Volume
Full 2.7ml blue top 3.2% sodium citrate Vacutainer® tube, venous draw only
Minimum Volume
ROTEM Delta (Core Lab)-Full 1.8ml blue top 3.2% sodium citrate Vacutainer® tube, venous draw only

ROTEM Sigma (POCT)- Full 2.7ml blue top 3.2% sodium citrate Vacutainer® tube
Storage Temperature
Room temperature
Rejection Criteria
Samples that are overfilled, underfilled, contain visible clots or debris, and are arterial blood will be rejected.
Additional Information

Physicians should complete Rotem result interpretation training in Cornerstone code PATH-62077 prior to ordering this test. Results are viewable as a scanned document in MiChart under Chart Review, Labs, Rotem Graphic Result.

Result report will be loaded in Mi-Chart and can be viewed at Chart Review -> Labs -> ROTEM Graphic Result.
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To access GEMWebLive for remote viewing:
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1. Use a Google Chrome or Microsoft Edge web browser to navigate to https://gem-web-live.med.umich.edu/
2. Login using your unique name and level-2 password
3. Search for a patient by typing the patient's CSN into the Patient ID field
If you are unable to login contact POCT by calling 66754 or emailing PATH-POC-INPATIENT@med.umich.edu.