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Related Concept Videos

Dose Size and Dosing Frequency: Determination Methods01:21

Dose Size and Dosing Frequency: Determination Methods

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Determining the optimal dose size and dosing frequency in pharmacotherapy is crucial for achieving therapeutic effectiveness while minimizing adverse effects. This article explores the methodologies employed in determining these parameters, focusing on their significance and interplay to tailor dosing regimens.Dose Size: Dose size refers to the amount of a drug administered in a single dose. It is determined based on the drug's pharmacodynamics and pharmacokinetics properties and...
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Determination of Multiple Dosing Parameters: Loading and Maintenance Doses01:25

Determination of Multiple Dosing Parameters: Loading and Maintenance Doses

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A loading dose is an essential pharmacological strategy to rapidly achieve the target plasma drug concentration necessary for an immediate therapeutic effect. This approach is especially critical for drugs characterized by slow absorption or extended half-lives, where delaying therapeutic plasma levels could compromise treatment outcomes. By administering a loading dose, clinicians ensure a prompt onset of drug action, even for agents with complex pharmacokinetic profiles.Achieving steady-state...
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Determination of Multiple Dosing Parameters: Steady-State, Minimum and Maximum Concentrations01:15

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Gentamicin, an aminoglycoside antibiotic, is commonly administered via intermittent intravenous infusion to treat severe infections. An intermittent one-hour infusion of gentamicin, administered at eight-hour intervals, allows for precise control of plasma drug concentrations, minimizing toxicity while ensuring therapeutic efficacy. Pharmacokinetic principles govern the dynamics of plasma concentrations and can be mathematically described using specific equations.The plasma drug concentration...
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Biological Effects of Radiation02:59

Biological Effects of Radiation

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All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
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Drug Accumulation During Multiple Dosing: Intermittent IV Infusions01:24

Drug Accumulation During Multiple Dosing: Intermittent IV Infusions

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Intermittent intravenous (IV) infusion is a method of drug administration where medications are delivered over short infusion periods followed by intervals of no drug delivery. This approach helps to prevent sustained high drug concentrations in the bloodstream, reducing the risk of adverse effects associated with prolonged exposure. Unlike continuous infusion, steady-state concentrations may not be achieved during a single dosing cycle but can be reached through repeated...
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A rational dosage regimen considers a drug's pharmacokinetics, including its absorption, distribution, metabolism, and elimination from the body. By understanding these factors, the appropriate dosage can be determined, and the dosing schedule can be designed to achieve and maintain the desired therapeutic effect while minimizing adverse effects.
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EURADOS-IDEAS GUIDELINES (VERSION 2) FOR THE ESTIMATION OF COMMITTED DOSES FROM INCORPORATION MONITORING DATA.

C M Castellani1, J W Marsh2, C Hurtgen3

  • 1ENEA, Radiation Protection Institute, Via dei Colli 16, 40136 Bologna, Italy carlomaria.castellani@enea.it.

Radiation Protection Dosimetry
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Summary
This summary is machine-generated.

Updated guidelines for radionuclide dose assessment incorporate new methods for tritium and wound cases. This revision enhances accuracy in bioassay measurements and dietary excretion data for improved radiation protection.

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Area of Science:

  • Radiation Dosimetry
  • Nuclear Medicine
  • Biokinetics

Background:

  • Dose assessment for radionuclide intake relies on biokinetic/dosimetric models.
  • The 2006 IDEAS Guidelines provided initial guidance.
  • European networks CONRAD and EURADOS initiated an update.

Purpose of the Study:

  • To improve and update the 2006 IDEAS Guidelines.
  • To incorporate new procedures and expanded data for radionuclide dose assessment.
  • To publish Version 2 of the IDEAS Guidelines.

Main Methods:

  • Maintained the general structure of the original IDEAS Guidelines.
  • Included new procedures like direct dose assessment for tritium (3H).
  • Implemented a special procedure for wound cases using the NCRP wound model.

Main Results:

  • Published Version 2 of the IDEAS Guidelines in a 2013 EURADOS report.
  • Expanded information on dietary excretion data for U, Th, Ra, and Po.
  • Updated typical and achievable detection limits for bioassay techniques.

Conclusions:

  • Version 2 of the IDEAS Guidelines provides updated and enhanced procedures for radionuclide dose assessment.
  • The revised guidelines incorporate advancements in biokinetic modeling and measurement techniques.
  • These updates aim to improve the accuracy and reliability of radiation dose estimations.