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.

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.
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
MiChart Code
Rotem Testing, Initial
  • Extem
  • Fibtem
  • Heptem
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 walked directly to the Hematology/Coagulation laboratory, Main Hospital, Room 2F471, along with the completed requisition.

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. Samples sent through the pneumatic tube system 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. To access Core Lab Hematology Citrix Remote Viewing for ROTEM via the kiosk PCs located in most patient care areas:

  • All UMHS domain users can access the application from https://vplaces.med.umich.edu using their level 2 credentials from any core system.
    On Non-Kiosk Core Systems it can be accessed by either https://vplaces.med.umich.edu or via the Start menu.
  • The Start menu option is not available for Kiosk systems.
  • Log in with Level 2 password.
    You will see the Citrix applications including ROTEM.
    You will be paged from the lab as to which remote ROTEM to view.
    Click on the appropriate ROTEM viewer.
    Remote access password: rotemremote
    Result report will be scanned in Mi-Chart by the Lab and can be viewed at Chart Review -> Labs -> ROTEM Graphic Result.

To access GEMWebLive for POCT OR remote viewing:
1. Use a Google Chrome or Microsfot 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.