Mar 31, 2015




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Coagulation

TEG-Patient on Heparin

TEG-Patient on Heparin (HCTEGH) Coagulation Lab Test

Name: TEG-Patient on Heparin

Test Name: TEG-Patient on Heparin

Health Link Test Code: HCTEGH

LIS Test Code: TEGH

CPT Code(s): 85347, 85384, 85576, 85390 (if lysis ordered)

Test Component:

Clot time-R, Clot strength-K, Angle, Maximum Amplitude and Lysis (if ordered)

Methodology: Thromboelastography

Clinical Information:

Assessment of hemostasis (if patient is receiving heparin)

Days Performed: Daily, 24 hours.

In-Lab Turnaround Time: 2 hours.

Stat In-Lab Turnaround Time: 2 hours.

Specimen: Blood

Collection Container: Light blue top (3.2% NaCitrate)

Collection Instructions:

DO NOT draw through a line containing heparin. The venipuncture MUST be atraumatic to avoid hemolysis, contamination with tissue factor or platelet activation. Tubes must be allowed to fill completely.


If unable to collect 1.8 ml tube (pediatrics only) please call UWHC Coagulation Lab at (608) 263-9617 or UWHC Special Coagulation Lab at (608) 263-5005 for alternate tube and instructions.

Collection Volume: 3.5 mL

Pediatric Collection Volume: Pediatric tube filled to fill mark

Stability Ambient:

2 hours unspun

Stability Refridgerated:

Not acceptable

Stability Frozen:

Not acceptable

Sample Analyzed: Whole Blood

Specimen Processing:

Do NOT freeze, refrigerate or centrifuge. Do NOT open tube. Call UWHC Special Coagulation at (608) 263-5005 if questions.

Specimen Transport:

Deliver specimen to UWHC Hospital Laboratory within 1 hour of collection. Call UWHC Special Coagulation at (608) 263-5005 if questions.

Unacceptable Criteria:

Hemolyzed or clotted specimens are NOT acceptable. A partially filled tube is NOT acceptable.


Age 18 years and up:  
Clot time-R, Hep 5.0-11.0 min
Clot Strength-K, Hep 1.0-4.0 min
Angle, Hep 47.0-74.0 degree
Max Amplitude, Hep 50.0-73.0 mm
Lysis, Hep 0.0-8.0%
Coag Index, Hep -3.0-3.0












The use of TEG in pediatric patients has not been cleared by FDA.   

Interpretation Type: Reference Interval