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Test Code TEGHN TEG 6S Heparin

Important Note

For patients receiving heparin therapy (cardiopulmonary bypass, ECMO, and/or other complicated patients on heparin drips). TEG TE (Transfusion Evaluation) is indicated for patients not receiving heparin.

Questions call Coagulation Lab at 2-1315

Specimen and Container/Tube

Specimen Type: Whole Blood

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

Other Acceptable specimens: N/A

Specimen Stability

Storage Temperature

Stability

Room temperature

2 hours

Refrigerated

not acceptable

Frozen

not acceptable

Collection Instructions

  • Using 21G or larger needle, collect two 2.7 mL light blue top tubes after 3 mL discard (5 mL discard if from indwelling catheter).
  • Once the blue top tube is completely filled, gently invert (do not shake) the sample tube at least five times to ensure complete mixing of the contents.

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.

 

NOTE: Once each blue top tube is completely filled, gently invert the sample tube at least five times to ensure complete mixing of the contents.

 

UCMC Offsite and UC MedLab Outreach Instructions: 

  • Collect specimen per standard collection procedure.
  • Once the blue top tube is completely filled, gently invert the sample tube at least five times to ensure complete mixing of the contents.
  • Specimen must reach laboratory within 2 hours of blood collection.
  • Sample must NOT be refrigerated or exposed to excessive heat.
  • Samples should be shipped room temperature.  Samples that are shipped refrigerated or frozen will be rejected.
  • Do NOT centrifuge. Samples centrifuged will be rejected.

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 (under/overfilled), clotted, heated, refrigerated, frozen, or centrifuged (reconstitution of a centrifuged specimen by mixing is not acceptable).

Reference Values

 

Citrated Kaolin

TEG Parameter

Units

Reference Interval

CK R

R (Reaction Time)

min

4.6-9.1

CK MA

MA (Max Amplitude)

mm

52-69

Citrated Kaolin w/Heparinase

TEG Parameter

Units

Reference Interval

CKH R

R (Reaction Time)

min

4.3-8.3

CKH LY30

LY30 (Lysis)

%

0-3.2

Citrated RapidTEG w/Heparinase

TEG Parameter

Units

Reference Interval

CRTH MA

MA (Maximum Amplitude)

mm

53-69

Citrated Functional Fibrinogen w/Heparinase

TEG Parameter

Units

Reference Interval

CFFH MA

MA (Maximum Amplitude)

mm

15-34

Critical Values

Analyte

Unit

Low

High

Age

N/A

N/A

N/A

N/A

N/A

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

Clinical Indications

Monitoring of heparin therapy and identification of coagulopathy in the heparinized patient. 

Test Components

  1. TEG Kaolin: Reaction Time (R-Time) and Maximum Amplitude (MA)
  2. TEG Kaolin post Heparinase: Reaction Time (R-Time), LY30, Maximum Amplitude (MA)
  3. Rapid TEG Post Heparinase: Maximum Amplitude (MA)
  4. Functional Fibrinogen Post Heparinase: Maximum Amplitude (MA)
  5. Pathologist Interpretation. If selected, it will be resulted into EPIC by the end of the next business day following TEG 5000 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

CPT Codes

85347 X3, 85384, 85525, 85390

LOINC Codes

Citrated Kaolin LOINC CODE

CK R

 99761-9

CK MA

 52778-8
Citrated Kaolin w/Heparinase LOINC CODE

CKH R

 66753-5

CKH LY30

 105752-0
Citrated RapidTEG w/Heparinase LOINC CODE

CRTH MA

 105753-8
Citrated Functional Fibrinogen w/Heparinase LOINC CODE
CFFH MA 105754-6

 

Methodology

Thromboelastography

Synonyms/Keyword Search

Thromboelastograph; TEG; cardiopulmonary bypass; ECMO, TEG2

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.

 

TEGHN 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

Last Review Date

11/04/25

Volume

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

 

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