TEG® vs

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Questions and Answers

What is the primary requirement for the precise application of clinical laboratory testing?

Using advanced technology for testing accuracy

Expanding the reference intervals for different populations

Increasing the number of laboratory analytes

Identifying a healthy population to estimate the normal range of variation (correct)

Which criterion defines normality for establishing reference intervals for laboratory analytes?

Absence of chronic/acute disease (correct)

Dietary habits

Physical fitness level

Genetic predisposition to diseases

What type of tube is used for collecting whole blood for serum?

Purple topped tube with anticoagulant

Blue topped tube with clot activator

Green topped tube with heparin

Red topped tube with no reagent (correct)

In specimen collection, what happens to heavy and light components of blood after spinning in a centrifuge?

Heavy components sink to the bottom, while light components migrate to the top Signup and view all the answers

What does the Sonoclot Analyzer measure?

Coagulation and platelet function in whole blood or plasma Signup and view all the answers

What does the Sonoclot Analyzer differentiate between?

Mechanical versus hemostatic bleeders Signup and view all the answers

What is the purpose of Thromboelastography with platelet mapping (TEG-PM)?

Measure platelet function and sensitivity to antiplatelet medications Signup and view all the answers

What does Platelet aggregometry measure?

Platelet clumping using several agonists Signup and view all the answers

What does the Sonoclot Analyzer provide in addition to a qualitative graph?

Quantitative results on clot formation time Signup and view all the answers

What is the purpose of the Onset and Clot RATE results in the Sonoclot Analyzer?

Automatically calculated and appear on the LED display Signup and view all the answers

What is the main function of Arachidonic acid (AA) in Thromboelastography with platelet mapping (TEG-PM)?

Sensitive to aspirin (nonsteroidal anti-inflammatory drugs) Signup and view all the answers

What is the primary sensitivity of Adenosine diphosphate (ADP) in Thromboelastography with platelet mapping (TEG-PM)?

Sensitive to clopidogrel Signup and view all the answers

What does LQC stand for in the context of clinical laboratory quality control?

Liquid Quality Control Signup and view all the answers

What is the purpose of EQC in clinical laboratory quality control?

Verifies internal components' functionality Signup and view all the answers

What does Thromboelastography (TEG) measure?

Global viscoelastic properties of whole blood clot formation Signup and view all the answers

What is the purpose of Calibration in clinical laboratory quality control?

Adjusting the output of a measurement device to align with a known standard's accuracy Signup and view all the answers

What can lead to unreliable readings from Glucometers/ketone meters?

Impaired peripheral circulation Signup and view all the answers

What does ROTEM measure?

Viscoelastic hemostatic properties Signup and view all the answers

What does the Dose Response Cartridge predict?

The loading dose of heparin Signup and view all the answers

What does HMS Plus technology monitor?

Anticoagulation, medication effects, heparin anticoagulation, temperature, and dilution Signup and view all the answers

What is the purpose of Quantitative heparin tests in clinical laboratory analysis?

Determine the actual heparin concentration Signup and view all the answers

What can cause heparin resistance?

Lower slope in clotting response Signup and view all the answers

What does EQC verify in clinical laboratory quality control?

Internal components' functionality Signup and view all the answers

What does Reference Interval refer to in clinical laboratory quality control?

The normal range for proficiency testing Signup and view all the answers

What is the purpose of using purple top tubes containing EDTA for blood collection?

To prevent clotting and collect plasma Signup and view all the answers

What can cause hemolysis in a blood sample?

Aging and external factors such as medications Signup and view all the answers

What is the role of the Point of Care Coordinator in a clinical laboratory?

Managing instrument compliance with regulations Signup and view all the answers

What does analytical sensitivity refer to in laboratory testing?

Ability to measure low concentrations of the analyte Signup and view all the answers

What is the purpose of the Centers for Medicare & Medicaid Services (CMS) Clinical Laboratory Improvement Amendments (CLIA)?

Regulate the quality and safety of U.S. clinical laboratories Signup and view all the answers

What is the responsibility of the Medical Director in a clinical laboratory?

Oversee all testing and ensure compliance with regulatory standards Signup and view all the answers

What does clinical specificity measure in laboratory testing?

Incidence of negative results in persons without the disease Signup and view all the answers

What can lead to false positives and false negatives in laboratory testing?

Interference by other substances Signup and view all the answers

What is the purpose of using red top tubes for blood collection?

To collect serum Signup and view all the answers

What is the responsibility of the laboratory in ensuring reliable test results?

Ensuring accuracy, precision, sensitivity, and specificity of analytical methods Signup and view all the answers

What is the role of the Medical Director in managing laboratory testing?

Overseeing all testing and ensuring compliance with regulatory standards Signup and view all the answers

What does specificity ensure in laboratory testing?

The test is not subject to interference by other substances Signup and view all the answers

What is the primary difference between TEG® and ROTEM®?

TEG® involves cup movement, while ROTEM® uses an immobile cup Signup and view all the answers

What is the function of RapidTEG®?

Triggering the extrinsic pathway and enabling faster testing Signup and view all the answers

What can TEG® evaluate using functional fibrinogen and platelet mapping tests?

Platelet function and clot formation with or without heparin Signup and view all the answers

What is the role of TEG® in assessing Antiplatelet (clopidegrel)?

Evaluating bleeding risk Signup and view all the answers

What do TEG® machines with resonance technology use instead of the traditional pin-in-cup technique?

Resonance technology Signup and view all the answers

What measurements does TEG® provide to assess clot formation and stability?

Reaction time (R value), kinetics (K value), angle (α-angle), and maximum amplitude (MA) Signup and view all the answers

How can TEG® guide treatment decisions based on the measured parameters?

Recommend fresh frozen plasma, cryoprecipitate, platelets, or fibrinolytic agents Signup and view all the answers

What are equivalent variables in ROTEM® to TEG®'s reaction time (R value) and maximum amplitude (MA)?

Clotting time (CT) and maximum clot firmness (MCF) Signup and view all the answers

What are the initial processes of platelet aggregation regulated by?

Interactions between subendothelial macromolecules, glycoprotein receptors, and platelet-derived substances Signup and view all the answers

What is the mechanism of action of major antiplatelet drugs such as clopidogrel and aspirin?

Block platelet activation and inhibit the upregulation of glycoprotein GPIIb/IIIa receptors Signup and view all the answers

Study Notes

Thromboelastography (TEG®) and ROTEM® Viscoelastic Hemostatic Assays Overview

Thromboelastography (TEG®) and rotational thromboelastogram (ROTEM®) are viscoelastic hemostatic assays that measure physical clot properties in whole blood.
TEG® predominantly measures clot properties with a pin suspended in a cup, while ROTEM® is an alternative assay widely available commercially.
TEG® involves placing whole blood in a citrated tube, transferring it to a tube containing kaolin (activator), and measuring the physical properties of the clot.
RapidTEG® uses kaolin and tissue factor as activators, triggering the extrinsic pathway and enabling faster testing, suitable for managing massive transfusions in trauma patients.
TEG® offers functional fibrinogen and platelet mapping tests to evaluate platelet function and clot formation with or without heparin.
Antiplat (clopidegrel) can be assessed using TEG® to evaluate bleeding risk, and newer TEG® machines use resonance technology instead of the traditional pin-in-cup technique.
TEG® provides various measurements such as reaction time (R value), kinetics (K value), angle (α-angle), and maximum amplitude (MA) to assess clot formation and stability.
TEG® can guide treatment decisions based on the measured parameters, such as recommending fresh frozen plasma, cryoprecipitate, platelets, or fibrinolytic agents.
TEG® and ROTEM® have differences in diagnostic nomenclature and operation, with TEG® involving cup movement and ROTEM® using an immobile cup, making their results not directly comparable.
Equivalent variables in ROTEM® include clotting time (CT), α-angle, clot formation time (CFT), maximum clot firmness (MCF), and clot lysis (CL).
The initial processes of platelet aggregation involve interactions between subendothelial macromolecules, glycoprotein receptors, and platelet-derived substances, regulated by antiplatelet drugs such as clopidogrel and aspirin.
Major antiplatelet drugs act to block platelet activation and inhibit the upregulation of glycoprotein GPIIb/IIIa receptors, essential for platelet aggregation, providing insights into their mechanisms of action.

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Description

Test your knowledge of Thromboelastography (TEG®) and ROTEM® viscoelastic hemostatic assays with this quiz. Explore the differences between TEG® and ROTEM®, understand the measurements they provide, and learn about their clinical applications in guiding treatment decisions.