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Test Code TEGTE TEG Transfusion Evaluation

Important Note

The TEG Transfusion Evaluation assay is FDA approved for testing in adult patients (18 years and older) where an evaluation of their blood hemostasis properties is desired.

Specimen and Container/Tube

Specimen Type: Whole Blood

Preferred Specimen: Light Blue Top Tube, 3.2% Sodium Citrate

Other Acceptable specimens: n/a

Volume

Preferred Volume: 1 Light Blue Top Tube, 3.2% Sodium Citrate

 

Minimum Volume: 1 Light Blue Top Tube, 3.2% Sodium Citrate

Specimen Stability

Storage Temperature

Stability

Room temperature

2 hours

Refrigerated

not acceptable

Frozen

not acceptable

Collection Instructions

  • Using 21G or larger needle, collect 2.7 mL light blue top tube after 3 mL discard (5 mL if from indwelling catheter).
  • Gently invert (do not shake) sample tube 5 times. Sample must NOT be refrigerated or exposed to excessive heat.
  • Once drawn, properly label tubes (ideally with a Sunquest label) and pack appropriately.

 

Specimen Handling and Transport Instructions

UCMC Onsite Instructions: 

  • Collect specimen per standard collection procedure and send to laboratory immediately.
  • Sample must NOT be refrigerated or exposed to excessive heat.

 

UCMC Offsite and UC MedLab Outreach Instructions: 

  • Sample must NOT be refrigerated or exposed to excessive heat.
  • Specimen must reach laboratory within 2 hours of blood collection.
  • DO NOT centrifuge.
  • DO NOT freeze

Rejection Criteria

  • Common specimen rejected situations include: incorrect specimen type, insufficient volume, missing or incomplete specimen identifiers, incorrect specimen transport, or specimens outside stability limits. 
  • Specimens that have wrong ratio of blood to anticoagulant (fill volume), clotted or grossly hemolyzed.

Reference Values

 

Test

Age

Sex

Reference Range

Kaolin R Time

All

All

4.6 - 8.8 minutes

Kaolin LY30

All

All

0.0 - 3.2 %

Rapid TEG Max Amplitude

All

All

50.4 - 68.5 mm

Functional Fibrinogen Max Amplitude

All

All

13.3 - 25.0 mm

Critical Values

Analyte

Unit

Low

High

Age

N/A

N/A

N/A

N/A

N/A

Test Components

  1.  TEG Kaolin R-time
  2.  TEG Kaolin Lysis (LY30)
  3.  Rapid TEG Maximum Amplitude (MA)
  4.  Functional Fibrinogen Maximum Amplitude (MA)
  5.  Pathology Interpretation. If selected, it will be resulted into EPIC by the end of the business day following TEG testing.

In instances where more immediate interpretations may be needed, please contact:

Monday - Friday, 8AM - 5PM: Coagulation Laboratory at 2-1315

All other times: Laboratory Medicine Resident On-Call (LMROC) at Pager 7910.

Clinical Indications

For non-operative bleeding/clotting, for operative bleeding/clotting in patients not on heparin or receiving massive transfusion, or for pre-operative baseline.

Methodology

Thromboelastography

CPT Codes

85347 X2, 85384, 85390

LOINC Codes

67790-6

Additional Information

  • Please document any drugs affecting hemostasis as well as any recent transfusions/fluid resuscitations in the relevant parts of this order in EPIC.
  • TEGTE assays will be visible in Citrix (TEG Manager).
  • 3.2% sodium citrate light blue top tubes must have 9 to 1 ratio of blood to anticoagulant.

Turnaround Time

Turnaround times are relative to the time the specimen is received in the test laboratory. 

STAT Turnaround Time: n/a

 

Routine Turnaround Time: 2 hours

 

Testing Schedule: 24/7

Last Review Date

04/08/2022