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Viscoelastrography

TEG, TEG6s, 6s, Visco

Test Codes

EPIC: LAB1231432

Department

Chemistry

Instructions

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.

Collected in 3.2% sodium citrate tubes and tested after 10 minutes but before the 4 hours post-collection time limit has lapsed.

Inpatient collection only.

Specimen Collection Criteria

Collect: Collect: One plain Blue-top tube (3.2% Na. Citrate) at room temp (20-26°C or 68-78.8°F). (Minimum Whole Blood: 3.0 mL)

Physician Office/Draw Specimen Preparation

Maintain specimens 4 hours at room temp (20-26°C or 68-78.8°F) prior to transport.

Preparation for Courier Transport

Transport: One plain Blue-top tube (3.2% Na. Citrate). (Minimum Whole Blood: 3.0 mL) at room temp (20-26°C or 68-78.8°F).

Rejection Criteria

• 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 ore 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 tested more than 4 hours after the specimen was collected.
• Specimens not collected and processed as indicated. 

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 4 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:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Chemistry Laboratory with any questions.

Laboratory

Royal Oak Chemistry Laboratory, Point of Care

Performed

As needed.
STAT results available within 1 hour of receipt in the Laboratory.
Routine results available within 24 hours.

Reference Range

By report.

Test Methodology

Viscoelastrograpy.

Clinical Utility

Results will be available in EPIC.

Contacts

Last Updated

6/27/2025