在实验室内和实验室之间的血和血清中比较etonogestrel生物分析试验结果
Shawnalyn W Sunagawa1, Lee C Winchester1, Christopher S Wichman2
1Antiviral Pharmacology Laboratory, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE, USA.
Contraception
|October 3, 2024
概括
乙格斯特勒生物分析试验在实验室内显示出很好的精度,但实验室之间存在显著的变化. 在研究中比较结果需要仔细考虑实验室差异.
科学领域:
- 药理动力学和药物新陈代谢
- 分析化学 分析化学
- 临床诊断 临床诊断 临床诊断
背景情况:
- 对于药理动力学研究来说,精确测量乙凝是非常重要的.
- 生物分析测定性能在实验室之间可能有很大差异.
研究的目的:
- 在多个实验室中评估乙格斯特勒生物分析试验的性能特征.
- 为了确定在乙格斯特勒量化中实验室间的变异性.
主要方法:
- 一个盲目的,六个实验室的研究使用准备和临床样本进行.
- 在血清和血中测量了etonogestrel度.
- 根据监管指南 (±15%偏差,CV) 评估了准确性和精度.
- 通过Kendall的Tau-B和Passing-Bablok回归分析了实验室间和实验室内部的协议.
主要成果:
- 所有实验室都表现出高精度 (CV ≤15%) 的乙凝测量.
- 与参考实验室相比,四个实验室满足了准确性标准 (±15%偏差).
- 观察到实验室间显著的变异性,结果从比参考值高5-28%高5-9%低.
- 在血清和血矩阵之间发现了良好的实验室内部一致性.
结论:
- 乙格斯特勒的生物分析测定显示出良好的实验室内部一致性,但实验室间存在相当大的差异性.
- 实验室之间乙凝结果的差异需要在比较药理动力学数据时保持谨慎.
- 建议进行标准化和熟练测试,以最大限度地降低etonogestrel分析的变化.
相关概念视频
01:16Bioequivalence: Overview
Pharmaceutical equivalents, by definition, are drug products with the same active ingredient in the same quantities, encapsulated in identical dosage forms, and intended for the same administration routes. These pharmaceutical equivalents are deemed bioequivalent if the bioavailability of the active entity in the drug preparations is similar. Moreover, pharmaceutical equivalents demonstrating bioequivalence are also regarded as therapeutically equivalent. This means that when used as directed,...
01:30Measurement of Bioavailability: Pharmacokinetic Methods
Pharmacokinetics is a vital branch of pharmacology that examines how drugs are absorbed, distributed, metabolized, and excreted by the body. Two key methodologies in pharmacokinetics are plasma drug concentration studies and urinary drug excretion analyses, both of which provide critical insights into a drug's therapeutic efficacy and bioavailability.Plasma Drug Concentration-Time StudiesPlasma drug concentration-time studies involve analyzing blood samples at specific intervals to quantify...
01:20Measurement of Bioavailability: Pharmacodynamic Methods
Pharmacodynamic methods provide insights into a drug's effects on physiological processes over time and play a crucial role in understanding bioavailability and therapeutic efficacy. These methods can be broadly classified into acute pharmacological and therapeutic response approaches, each with distinct mechanisms and applications.The acute pharmacological response method directly correlates a drug's physiological effects, such as ECG or pupil diameter changes, to its time course in the body.
01:17Equivalence: In Vitro and In Vivo Bioequivalence
Bioequivalence studies are crucial in evaluating whether new drugs can match an approved one regarding pharmacological effects and clinical performance. These studies test if drugs, despite different dosage forms, share identical plasma concentration-time profiles. Three types of equivalence are central to these studies: chemical, pharmaceutical, and therapeutic. Chemical equivalence indicates that two or more drug products contain identical active ingredients in equal amounts. Pharmaceutical...
01:16Bioequivalence Data: Statistical Interpretation
The statistical interpretation of bioequivalence data is a significant aspect of pharmaceutical research. Bioequivalence refers to the absence of any significant difference in the rate and extent to which the active ingredient in pharmaceutical products becomes available at the site of drug action when administered at the same molar dose under similar conditions. This helps determine if different drug products have similar absorption rates, ensuring their interchangeability.Statistical...