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Related Concept Videos

Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

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Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
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Controlled-Current Coulometry: Overview01:27

Controlled-Current Coulometry: Overview

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Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...
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Controlled-Current Coulometry: Coulometric Titration01:18

Controlled-Current Coulometry: Coulometric Titration

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Coulometric titrations are a form of titrimetric analysis where the reagent is generated electrically, and its amount is evaluated based on current and generating time. The electron serves as the standard reagent. The procedure is similar to conventional titrations, such as endpoint detection.
The fundamental requirements for coulometric titrations are (1) 100% efficiency in the reagent-generating electrode reaction and (2) a stoichiometric and preferably rapid reaction between the generated...
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Effects of EDTA on End-Point Detection Methods01:18

Effects of EDTA on End-Point Detection Methods

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Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
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Coulometry: Overview01:00

Coulometry: Overview

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Coulometry is one of the rapid, most accurate, and precise analytical techniques that determine the quantity of an analyte by measuring the electrical charge needed for its complete electrolysis without using any analytical standards. The total charge passed during electrolysis correlates with the analyte amount by Faraday's laws of electrolysis. For accurate coulometric measurements, a charge equal to Faraday's constant multiplied by the number of electrons involved in the relevant...
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Evaluation of a Point-of-Care Testing Analyzer for Measuring Peripheral Blood Leukocytes
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Cost-Effectiveness of POC Coagulation Testing Using Multiple Electrode Aggregometry.

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    Point-of-Care (POC) coagulation testing, using Multiple Electrode Aggregometry (MEA), reduced red blood cell transfusions and complications in cardiac surgery patients. This approach also proved more cost-effective than standard laboratory testing (SLT).

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    Area of Science:

    • Health economics
    • Medical technology assessment
    • Coagulation diagnostics

    Background:

    • Economic impact of Point-of-Care (POC) coagulation testing, specifically Multiple Electrode Aggregometry (MEA), remains underexplored.
    • Current research lacks comprehensive economic evaluations of POC coagulation testing in clinical practice.

    Purpose of the Study:

    • To evaluate the economic impact and clinical effectiveness of POC coagulation testing versus standard laboratory testing (SLT) in cardiac surgery.
    • To assess the cost-effectiveness of using MEA for platelet dysfunction assessment in hemotherapy algorithms.

    Main Methods:

    • Development of a health economic model incorporating clinical endpoints for coagulation testing.
    • Comparison of POC testing (MEA) with SLT, including pre- and perioperative hemotherapy costs, testing costs, and hospitalization expenses.
    • Simulation of a cohort of 10,000 cardiac surgery patients to analyze transfusion requirements and complications.

    Main Results:

    • POC testing reduced red blood cell transfusions by 950 patients in a simulated cohort of 10,000.
    • Massive transfusions and transfusion-related complications decreased by 284 and 126 patients, respectively, with POC testing.
    • POC testing resulted in an average cost saving of 288 Euro per patient compared to SLT.

    Conclusions:

    • Integrating MEA into hemotherapy algorithms enhances medical outcomes for cardiac surgery patients.
    • POC testing demonstrates a superior economic outcome compared to SLT, despite higher initial testing costs.
    • The study highlights the cost-effectiveness and clinical benefits of adopting POC coagulation testing in surgical settings.