UW Hospital and Clinics Lab Test Directory
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TEG- Patient not on Heparin
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| Test Code(s): |
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TEGP / HCTEGP
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| CPT Code(s): |
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85347,85384,85576,85390(if lysis ordered)
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| Test Description: |
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Test Component: Clot time-R, Clot strength-K, Angle, Maximum Amplitude and Lysis (if ordered)
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| Methodology: |
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Thromboelastography
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| Clinical Significance: |
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Assessment of hemostasis for patients not receiving heparin.
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| Days Performed: |
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Daily, 24 hours.
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| Turnaround Time: |
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Stat: 2 hours.
Routine: 2 hours.
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Specimen Requirements
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| Specimen: |
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Blood
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| Collection Instructions: |
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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 Core Coagulation Lab at 263-9617 or Special Coagulation Lab at 263-5005 for alternate tube and instructions.
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| Collection Container: |
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Preferred: Light blue top (3.2% NaCitrate)
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| Collection Volume: |
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Preferred: 3.5 mL
Pediatrics: Pediatric tube filled to fill mark
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| Sample Analyzed: |
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Whole Blood
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| Specimen Processing: |
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Do NOT freeze, refrigerate or centrifuge. Do NOT open tube. Call UWHC Special Coagulation at (608)263-5005 if questions.
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| Specimen Transport: |
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Deliver specimen to UWHC Core Laboratory (B4/220) within 1 hour of collection. Call UWHC Special Coagulation at (608)263-5005 if questions.
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| Unacceptable Criteria: |
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Hemolyzed or clotted specimens are NOT acceptable. A partially filled tube is NOT acceptable.
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| Stability: |
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Ambient: 2 hours unspun
Refrigerated: Not acceptable
Frozen: Not acceptable
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Interpretation
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Reference Interval:
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| Age 18 years and up: |
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| Clot time-R |
5.0-11.0 min |
| Clot Strength-K |
1.0-4.0 min |
| Angle |
47.0-74.0 degree |
| Max Amplitude |
50.0-73.0 mm |
| Lysis |
0.0-8.0% |
The use of TEG in pediatric patients has not been cleared by FDA. Pediatric reference intervals have not been established.
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Thromboelastogram
thromboelastograph
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