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Clinical Case
Why use Thromboelastography?
How does a TEG works?
TEG is the Lifespan of a Clot
R time
K time
Alpha angle
Maximum amplitude & LY30
What does the literature show?
Example #1 - Increased R Time
Example #2 - Increase K Time, Decreased Alpha angle
Example #3 - Decreased Maximum Amplitude
Example #4 - Increased LY30
Example #5 - Hypercoagulable
Example #6 - Disseminated Intravascular Coagulation
Limitations of TEG
Clinical case and summary
Thromboelastography
Thrombus formation
The TEG exam analyzes each phase of the clotting process.
Citrated blood is introduced into the sample cup of the TEG machine.
The magnitude of pin motion is directly proportional to the strength of the clot.
The torsion pin remains motionless until clotting begins.
Amplitude decreases as fibrinolysis begins and the pin begins to slip
Measured Parameters R (reaction time) K(K time) Alpha Angle MA (maximum amplitude) LY30 (lysis at 30 mins.)
Alpha Angle normal is 53-72 degrees. A low value represents deficient fibrinogen and is treated with cryoprecipitate.