Viscoelastography

TEG, TEG6s, 6s, Visco, TEG Global, TEG Trauma, TEG Lysis, TEG HN, Heparin Neutralization, TEG PM, TEG Platelet, Platelet Mapping

Test Codes

	Dearborn	Royal Oak	Troy
Viscoelastography   [LAB1231432]	n/a
Viscoelastography with FIBRINOLYSIS [LAB1231433]
Viscoelastography Platelet Mapping ADP and AA [LAB1232324]		n/a
Viscoelastography with Heparin Neutralization [LAB1232325]		n/a	n/a

Instructions

Inpatient collection, at designated sites only.

A minimum of 3.0 mL of blood must be wasted using an additive-free tube prior to specimen collection. Specimens must be labeled and inverted 5 times immediately after collection.

Viscoelastography [LAB1231432]
Viscoelastography with FIBRINOLYSIS [LAB1231433]
Viscoelastography with Heparin Neutralization [LAB1232325]

Collect in 3.2% Blue-top sodium citrate tubes. Test after 10 minutes but before 2 hours post-collection.

Viscoelastography Platelet Mapping ADP and AA [LAB1232324]

Collect in non-gel heparin tubes (dark green) with >14.5 IU but <20 IU heparin/mL of blood. Test after 30 minutes but before 2 hours post-collection.

Specimen Collection Criteria

Viscoelastography [LAB1231432], or
Viscoelastography with FIBRINOLYSIS [LAB1231433], or
Viscoelastography with Heparin Neutralization [LAB1232325]

Rejection Criteria

• Specimens collected off-site.
• Specimens collected without prior blood wasting should be rejected. Blood from the initial draw will contain tissue and/or line contaminants.
• Any sample collected after a Red-top activator tube, or Red-top gel tube is used as the discard tube.
• Incompletely filled tubes.
• Clotted or partially clotted blood.
• Samples checked for clots using a wooden stick.
• Refrigerated specimens or specimens stored on ice.
• Collected in anything other than a 3.2% citrate tube (or heparin tube for Platelet Mapping).
• Specimen collected more than 2 hours prior to testing. 
• Specimens not collected and processed as indicated. 

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 2 hours
Refrigerated (2-8°C or 36-46°F): Unacceptable
Frozen (-20°C/-4°F or below): Unacceptable

Specimen Storage in Department Prior to Disposal:

No testing is performed if more than 2 hours post-collection.

Laboratory

Dearborn Blood Bank Laboratory
Royal Oak STAT Lab
Troy Hematology Laboratory

Performed

As needed.
Results available within 1 hour of receipt in the Laboratory.

Reference Range

By report.

Test Methodology

Viscoelastography

Clinical Utility

Results will be available in TEG Manager® software and in EPIC.

Viscoelastography is used clinically for evaluation of blood hemostasis properties in adult patients. The Platelet Mapping assay may be used to provide qualitative assessment of platelet function in adult patients.

Contacts

Last Updated

5/7/2026