How do you interpret TEG values?
If we interpret our TEG values: R time 20.0 => well above the upper limit of normal (10.0 minutes) = significantly prolonged time for clot formation. K time 13.2 => normal: up to 10.0 = prolonged fibrin cross-linking. a-angle 16.5 => normal >53.0 = limited clot formation.
What is a normal TEG?
Approximate normal values (kaolin activated TEG, values differ if native blood used, and between types of assay) R: 4-8 min. K: 1-4 min. α-Angle: 47-74° MA: 55-73mm.
When is Thromboelastography used?
Thromboelastography (TEG) is a method of testing the efficiency of blood coagulation. It is a test mainly used in surgery and anesthesiology, although increasingly used in resuscitations in Emergency Departments, intensive care units, and labor and delivery suites.
What is ck in TEG?
The kaolin-activated TEG channel (CK) demonstrated a prolonged R time, indicating coagulation factor deficiency. The CK channel also showed a prolonged K time and reduced angle with reduced maximum amplitude (MA) on the functional fibrinogen (CFF) channel, indicating decreased fibrinogen contribution to clot formation.
What is clot strength?
G is a measure of clot strength or clot firmness, and is calculated based on the amplitude value (A) until the maximum amplitude (MA) is reached. It is the single most important value of the entire assay because it represents the overall function or effectiveness of the clot.
What is R time in TEG?
For standard TEG, the traditional reaction time (R-time) is the time to clot initiation, representing the status of clotting factors and/or the effects of anticoagulants. Normal values for the R-time with standard TEG are 4 to 8 minutes.
What is the difference between TEG and Rotem?
A pin is suspended into the cup, and then some sort of rotation takes place. In fact the main difference between TEG and ROTEM is the bit which rotates (TEG rotates the cup, and ROTEM rotates the pin). Irrespective of which bit is rotating, some impediment to the rotation develops as the blood clots.
How does TEG platelet mapping work?
TEG with platelet mapping (TEG-PM), a modification of the standard TEG, evaluates platelet function through direct activation of arachidonic acid (AA) and adenosine diphosphate (ADP) receptors, with analysis of the resulting formation of TEG curves.
Which is better TEG or Rotem?
Transfusion in trauma is often empiric or based on traditional lab tests. Viscoelastic tests such as thromboelastography (TEG®) and rotational thromboelastometry (ROTEM®) have been proposed as superior to traditional lab tests.
What is a normal R time with TEG?
What is maximum amplitude TEG?
Maximum Amplitude (MA)
A function of the maximum dynamic properties of fibrin and platelet bonding via GPIIb/IIIa and represents the strongest point of fibrin clot and correlates to platelet function: 80% platelets; 20% fibrinogen.
What does Rotem measure?
BACKGROUND: ROTEM is a method of measuring hemostasis quality via the viscoelastic properties of a blood clot and is designed for patient blood management. ROTEM provides a rapid assessment of clot development from secondary hemostasis to clot lysis by evaluating clot formation, clot firmness, and clot fibrinolysis.
How long does it take to run a TEG?
Each TEG run generally takes 30 minutes to an hour to complete and only a few cases can run simultaneously, unlike conventional lab coagulation testing. Therefore, optimization of TEG use is an important concern in providing appropriate patient laboratory testing.
Are TEG and Rotem the same?
Unlike TEG, ROTEM has four channels with different reagents to detect abnormalities in different components involved in coagulation (Intem- contact activation pathway, Extem- tissue factor pathway, Heptem- neutralization of heparin, Fibtem- the contribution of fibrinogen to clot formation).
What does Rotem stand for?
PURPOSE: To provide a guideline for Rotational Thromboelastometry (ROTEM) BACKGROUND: ROTEM is a method of measuring hemostasis quality via the viscoelastic properties of a blood clot and is designed for patient blood management.
What is TEG reaction time?
The reaction time orr value (TEG-activated clotting time in rTEG) represents the time taken for first measurable clot formation and is a reflection of enzymatic clotting activation.
How much does a TEG test cost?
These tests are also costly and take a long time for results. TEG could potentially replace PT/INR, PTT, and platelet function tests ▪ Together, all of these tests cost over $500!
Where is Rotem used?
Rotational thromboelastometry (ROTEM®) has been used to diagnose coagulopathy and guide hemostatic therapy in trauma. This systematic review of clinical studies in trauma investigates the ROTEM® parameters thresholds used for the diagnosing coagulopathy, predicting and guiding transfusion and predicting mortality.
What does a Rotem measure?
Who makes TEG?
In many centers, Thromboelastography® (TEG®) (Haemonetics Corporation, Braintree, MA) has become an integral part of patient care. Over time, its value is becoming increasingly well established within liver transplantation (1), cardiac surgery (2), trauma centers (3), and beyond.
How does a Rotem work?
As the blood clots, Fibrin-Platelet strands form between the cup and the pin and as the viscoelastic strength of the clot increases, the rotation of the cup is transmitted to the pin in the case of the TEG® device but in the ROTEM® device it impedes rotation of the pin. This is detected and a trace generated.
What is the difference between Rotem and TEG?
In fact the main difference between TEG and ROTEM is the bit which rotates (TEG rotates the cup, and ROTEM rotates the pin). Irrespective of which bit is rotating, some impediment to the rotation develops as the blood clots.
What is a hemostasis analyzer?
It ensures the fluidity of the blood and the integrity of the blood vessels. Blood disorders can lead to bleeding or blood clots. These new range allows screening and assessment of bleeding disorders, monitoring of anticoagulation therapy.
What is ML in Rotem?
• Evidence of Hyperfibrinolysis on ROTEM. • ML = Maximum Lysis (at any given point in time) • Percentage of clot lost in relation to MCF.
What is the purpose of a coagulation analyzer?
Coagulation analyzers provide measurement of blood platelet levels in a fast and simple process. A coagulation test could provide diagnostic prevention from potentially heart attack-inducing blood clots.