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相关概念视频

Dosage Regimens: Designs and Approaches01:28

Dosage Regimens: Designs and Approaches

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Designing a dosage regimen, which refers to the manner of drug administration, is a complex process involving the selection of drug dose, route, and frequency. This process is underpinned by pharmacokinetic parameters derived from tests and population averages. These parameters are then tailored to patient-specific variables such as diagnosis, demographics, and allergy status. Once therapy commences, therapeutic response monitoring is critical and achieved through clinical and physical...
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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...
406
Dosage Regimen Designs: Nomograms and Tabulations01:23

Dosage Regimen Designs: Nomograms and Tabulations

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Nomograms and tabulations are vital tools used by clinicians to design accurate and individualized dosage regimens. These instruments provide a straightforward method for adjusting dosages based on individual patient characteristics, including age, weight, and physiological condition. The foundation of a drug's nomogram is population pharmacokinetic data collected and analyzed using specific models. This data simplifies complex equations, presenting them diagrammatically or tabularly for easy...
360
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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Drug Dosing: Infants and Children01:29

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Pediatric patient dosages diverge from adults due to disparities in body surface area, total body water, and extracellular fluid per kilogram of body weight. The dosing regimen considers the variations in pharmacokinetics and pharmacology across distinct age groups, encompassing preterm newborns, infants, young children, older children, and adolescents. Calculation of pediatric patient doses is predicated on determining body surface area, which exhibits a superior correlation with the child's...
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相关实验视频

Updated: May 7, 2026

Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator
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用于CMS大小调整剂量报告的患者大小估计方法:可变性,挑战和建议.

Gary Ge1, Charles M Weaver1, Alexander Alsalihi1

  • 1Division of Diagnostic & Nuclear Medical Physics, Department of Radiology, University of Kentucky College of Medicine, Lexington, Kentucky.

Journal of the American College of Radiology : JACR
|August 2, 2025
PubMed
概括

患者尺寸估计方法显著影响CT尺寸调整剂量 (SAD) 计算和遵守CMS质量措施. 标准化这些方法对于在CT成像中进行一致和可靠的剂量评估至关重要.

关键词:
这是CMSCMSCMSCMSCMSCMSCMSCMS剂量 CT CT 剂量这就是IQR,IQR.根据大小调整后的剂量.

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科学领域:

  • 医学成像物理 医学成像物理
  • 放射学质量保证 质量保证

背景情况:

  • 美国医疗保险和医疗补助服务中心 (CMS) 推出了与补偿相关的CT大小调整剂量 (SAD) 质量衡量标准 (CMS1074v3).
  • 不一致的患者大小估计方法引入了变化,可能会损害SAD测量和质量评估的可靠性.

研究的目的:

  • 评估五种不同的患者大小估计方法.
  • 评估这些方法对CT大小调整剂量 (SAD) 值和符合CMS值的影响.

主要方法:

  • 追溯分析了719个CT检查的7个协议 (五个腹部,两个胸部).
  • 评估了五种患者直径计算方法:HU值值,水等价直径 (WED),侧向/AP转换,LAT×AP,以及 (LAT+AP) /2.2.
  • 使用克鲁斯卡尔-瓦利斯和对对测试进行统计分析,以确定显著差异.

主要成果:

  • 在不同的计算方法中观察到SAD值的显著变化.
  • 基于减弱的方法 (HU,WED) 在胸部扫描中高估了SAD;基于投影的方法在腹部扫描中显示出更高的变化.
  • 取决于方法的变化影响了对CMS剂量值的遵守,导致胸部和腹部协议中的特定方法出现更多的失败. 泌尿镜检查显示出意想不到的低SAD值.

结论:

  • 不一致的患者大小估计和协议映射对CMS SAD质量测量提出了技术挑战.
  • 建议标准化检查映射和重新考虑剂量值,以改善临床对齐和测量可靠性.