Thromboelastography
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Author:
Mikael Häggström, M.D. [note 1]
Interpretation
Parameters derived from thromboelastography are mainly:[1]
- R time: Time to initial clot formation (that is, amplitude deviation from baseline)
- K time: Time from initial clot formation until reaching 20 mm in amplitude
- Alpha angle (α): Angle between the baseline at initial clot formation, and a tangent line that intersects the tracing curve.
- Maximum amplitude (MA): Maximum deviation of tracing to baseline.
- A30: Amplitude 30 minutes after reaching maximum amplitude.
Following are examples of thromboelastography patterns and recommended treatments.[2][3]
| Condition | Appearance | Main treatment |
|---|---|---|
| Normal |  |
|
| Hemodilution or clotting factor deficiency |  |
Fresh frozen plasma |
| Fibrinogen deficiency |  |
Cryoprecipitate |
| Low or dysfunctional platelets |  |
Platelets |
| Thrombosis |  |
Anticoagulant |
| Primary fibrinolysis |  |
Antifibrinolytics or tranexamic acid |
| Secondary fibrinolysis |  |
Treating disseminated intravascular coagulation |
Notes
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Patholines:Authorship for details.
Main page
References
- ↑ Tyler PD, Yang LM, Snider SB, Lerner AB, Aird WC, Shapiro NI (2021). "New Uses for Thromboelastography and Other Forms of Viscoelastic Monitoring in the Emergency Department: A Narrative Review. ". Ann Emerg Med 77 (3): 357–366. doi:. PMID 32988649.
- ↑ Collins S, MacIntyre C, Hewer I (2016). "Thromboelastography: Clinical Application, Interpretation, and Transfusion Management. ". AANA J 84 (2): 129–34. PMID 27311154. Archived from the original. .
- ↑ Kreitzer NP, Bonomo J, Kanter D, Zammit C (2015). "Review of Thromboelastography in Neurocritical Care. ". Neurocrit Care 23 (3): 427–33. doi:. PMID 26275677. Archived from the original. .
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