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Test Code TEG Thromboelastograph

Important Note

Call the Laboratory at ex 7-2561 before ordering or sending this test to ensure timely results

Clinical System Name





The TEG analyzer monitors shear elasticity, a physical property of a blood clot, A computer monitors the resulting data and calculates the curve dynamics. The overall profile can be qualitatively and /or quantitatively interpreted in terms of a HYPO, NORMAL, or HYPER coagulable state of the sample.

Sample Requirements

Specimen: Whole Blood

Container(s):  Lt Blue/Citrate

Preferred Vol: 1.8 mL

Minimum Vol: 1.8 mL


Note: Can not be shared with other coagulation tests. Testing must be performed with in 30 minutes of collection.


Preferred method of collection is venipuncture with vacuum fill.  Test results are affected by incorrect blood volume.  Use of a Vascular Access Device for the  collection of coag testing is not recommended.

If this method is used it requires a 5 mL waste volume; 3 mL for size 2 French catheter or smaller. Blood must be trasferred to the  Lt Blue/Citrate tube by use of a  blood transfer device to ensure proper fill. 




Processing Instructions

Reject due to: Clotted, Insufficient quantity, and  Improper collection.

Spin :N

Aliquot :N

Temp: RT

Storage location: Core lab Coagulation department.


Note: Deliver blood to Core Heme bench,  red TEG rack.  Coag Technologist will process. 

Do not centrifuge specimen. Test should be set up  within 30 minutes of collection.



Off-site collection: Cannot be collected outside Children's. Contact Laboratory for additional information.


Specimen Type Temperature Time

Whole blood

Lt Blue/Citrate

Room temp 30 m
  Refrigerated N
  Frozen N



STAT Performed TAT
Y daily 3 h


Performing Laboratory

Seattle Children's Laboratory    



Department:   Coagulation

Phone Number: 206 987-2578




Reference Range

K TEG 2.0 - 6.0 minutes
MA 52 - 70 mm
ANGLE 55 - 74 degrees
LY30 0.0 - 8.0%
Cl -3.0 - +3.0



Method: kinetic changes in a sample of citrated whole blood, by the Haemoscope TEG 5000.

Analytical Volume: 1 mL Whole blood


Limitations: Method is affected by failure to perform test within 30 minutes of blood draw.


OR personnel: If you are going to run TEG application, you must be part of the TEG-C security group in IS. If you are not part of this group, when you try to launch the application you will receive errors. Have someone known to be part of this group (anesthesiologist) log on to the pc with their network username and password. Once logged on to the pc, the TEG application should then launch successfully and you should be able to log into the application without experiencing any errors.

CPT Codes


Special Instructions

Links to:

Consent Forms




Clinical Utility

Clinical Utility

Send Out Instructions


Reference Test Name:  
Reference Test Number:  
Instructions: .


Critical Values

Not defined for this test.