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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...
394
Drug Dosing in Renal Diseases: Dose Adjustments Based on Drug Clearance and Elimination Rate Constant01:25

Drug Dosing in Renal Diseases: Dose Adjustments Based on Drug Clearance and Elimination Rate Constant

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In patients with renal disease, dosage adjustments are necessary to maintain therapeutic plasma drug concentrations and prevent toxicity or subtherapeutic exposure. Renal impairment alters drug pharmacokinetics, especially in conditions like uremia, where changes such as prolonged elimination half-life and altered apparent volume of distribution can significantly affect drug disposition. These changes require careful modification of the dosing regimen to achieve the desired clinical...
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Dosage Regimen: Individualization01:24

Dosage Regimen: Individualization

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Individualization in dosing regimens is the customization of medication doses for individual patients. Its necessity arises from the goal of maximizing therapeutic benefits while minimizing risks. This approach is pivotal because human responses to drugs can vary widely; what is effective for one person may be inadequate or excessive for another. Interpatient (intersubject) variability refers to differences in drug responses between individuals, while intrapatient (intrasubject) variability...
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Rational Dosage Regimen: Maintenance Dose and Loading Dose01:24

Rational Dosage Regimen: Maintenance Dose and Loading Dose

5.4K
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.
In most cases, drugs are administered repetitively or infused continuously to maintain a steady-state concentration in the body. At a steady...
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Dose-Response Relationship: Overview01:03

Dose-Response Relationship: Overview

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Agonists can bind with and activate receptors, resulting in the formation of drug-receptor complexes. Once formed, these complexes catalyze many biochemical processes at the cellular level and subsequently induce a pharmacologic response. The degree of response is directly proportional to the fraction of activated receptors, which in turn, depends on the concentration of the drug at the receptor site as well as the sensitivity of the receptor. An increase in the administered dose contributes to...
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A Whole Body Dosimetry Protocol for Peptide-Receptor Radionuclide Therapy PRRT: 2D Planar Image and Hybrid 2D+3D SPECT/CT Image Methods
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Dose optimization in nuclear medicine.

Frederic Fahey1, Michael Stabin2

  • 1Department of Radiology, Boston Children׳s Hospital, Harvard Medical School, Boston, MA.

Seminars in Nuclear Medicine
|May 17, 2014
PubMed
Summary
This summary is machine-generated.

Diagnostic nuclear medicine uses radiation, so the right test, dose, patient, and timing are crucial. Optimizing procedures minimizes radiation exposure, ensuring benefits outweigh risks for effective patient management.

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Area of Science:

  • Nuclear medicine
  • Medical imaging
  • Radiology

Background:

  • Diagnostic nuclear medicine utilizes ionizing radiation, necessitating a careful balance between potential risks and patient benefits.
  • Effective medical management relies on accurate diagnostic information derived from these procedures.

Purpose of the Study:

  • To discuss the critical factors in administering diagnostic nuclear medicine procedures.
  • To emphasize the importance of optimizing radiation dose while maintaining diagnostic efficacy.
  • To explore these principles within cardiovascular nuclear medicine and hybrid imaging (PET/CT, SPECT/CT).

Main Methods:

  • Review of principles for appropriate test selection and patient-specific dosing.
  • Discussion of optimization strategies to minimize radiation exposure.
  • Contextualization within cardiovascular nuclear medicine and hybrid imaging modalities.

Main Results:

  • The judicious application of nuclear medicine procedures, when clinically indicated, offers significant patient benefits.
  • Optimized radiation dosing ensures that the diagnostic information obtained is sufficient for medical management.
  • Hybrid imaging techniques like PET/CT and SPECT/CT are integral to modern cardiovascular nuclear medicine.

Conclusions:

  • The benefits of diagnostic nuclear medicine, when performed appropriately, significantly outweigh the minimal risks associated with radiation exposure.
  • Adherence to the principles of 'right test, right dose, right patient, right time' is paramount.
  • Continuous optimization of procedures is essential for safe and effective patient care in nuclear medicine.