对前稳定状态与稳定状态度的万科米辛贝叶斯模型进行回顾性内部分析
Elizabeth W Covington1, Jihyun L Chae1, Sarah Grace Gunter2
1Harrison College of Pharmacy, Auburn University, Auburn, AL, USA.
概括
贝叶斯模型准确地估计了使用稳定状态前度的万科米辛24小时曲线下的面积 (AUC24). 使用稳定状态度的计算显示出轻微偏差,但总体一致,在使用稳定状态前水平时,类别不匹配较少.
科学领域:
- 药理动力学和药理动力学
- 临床药房
- 计算模型
背景情况:
- 使用贝叶斯模型估计米素24小时曲线下的面积 (AUC24),使用稳定状态前度.
- 在有限的研究中,比较了从稳定状态和前稳定状态度中得出的贝叶斯 AUC24 计算.
研究的目的:
- 评估使用贝叶斯模型从稳定状态前度与稳定状态度得出的万科米辛AUC24计算之间的一致性.
- 根据不同度采样时间,比较范素AUC24估计的准确性和可靠性.
主要方法:
- 对93名患者进行前稳定状态和稳定状态度的回顾性队列研究.
- 贝叶斯AUC24的计算包括和不包括稳定状态水平.
- 使用布兰德-阿尔特曼图和线性回归进行偏差分析.
主要成果:
- 当稳定状态水平被隐藏时,AUC24估计值的平均差异为8. 8 mg*h/ L,而稳定状态前水平被隐藏时为-3. 7 mg*h/ L.
- 当稳定状态水平被隐藏时观察到比例偏差 (P = 0. 038),但当前稳定状态水平被隐藏时没有.
- 当稳定状态水平被隐藏时 (26%) 的类别不匹配率明显高于稳定状态前水平被隐藏时 (8%,P < 0.001).
结论:
- 不管是否包括稳定状态度,贝叶斯的范素AUC24计算表明总体一致.
- 虽然有小的平均差异,但在贝叶斯计算中使用稳定状态水平导致了更严格的协议限制.
- 需要对更大群体进行进一步的研究,以证实关于万科米辛AUC24估计的这些发现.
相关概念视频
01:14Analysis Methods of Pharmacokinetic Data: Model and Model-Independent Approaches
223
Drug disposition in the body is a complex process and can be studied using two major approaches: the model and the model-independent approaches.
The model approach uses mathematical models to describe changes in drug concentration over time. Pharmacokinetic models help characterize drug behavior in patients, predict drug concentration in the body fluids, calculate optimum dosage regimens, and evaluate the risk of toxicity. However, ensuring that the model fits the experimental data accurately...
The model approach uses mathematical models to describe changes in drug concentration over time. Pharmacokinetic models help characterize drug behavior in patients, predict drug concentration in the body fluids, calculate optimum dosage regimens, and evaluate the risk of toxicity. However, ensuring that the model fits the experimental data accurately...
223
01:24One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation
708
This lesson introduces two critical methods in pharmacokinetics, the Wagner-Nelson and Loo-Riegelman methods, used for estimating the absorption rate constant (ka) for drugs administered via non-intravenous routes. The Wagner-Nelson method relates ka to the plasma concentration derived from the slope of a semilog percent unabsorbed time plot. However, it is limited to drugs with one-compartment kinetics and can be impacted by factors like gastrointestinal motility or enzymatic degradation.
On...
On...
708
00:59Model-Independent Approaches for Pharmacokinetic Data: Noncompartmental Analysis
124
Noncompartmental analyses offer an alternative method for describing drug pharmacokinetics without relying on a specific compartmental model. In this approach, the drug's pharmacokinetics are assumed to be linear, with the terminal phase log-linear. This assumption allows for simplified analysis and interpretation of the drug's behavior in the body.
One important characteristic of noncompartmental analyses is that drug exposure increases proportionally with increasing doses. This...
One important characteristic of noncompartmental analyses is that drug exposure increases proportionally with increasing doses. This...
124
01:09One-Compartment Open Model for IV Bolus Administration: Estimation of Elimination Rate Constant, Half-Life and Volume of Distribution
494
The one-compartment open model is a simplified approach used in pharmacokinetics to understand the distribution and elimination of a drug administered through an intravenous bolus. This model assumes rapid drug dispersal throughout the body and elimination using a first-order process. Key pharmacokinetic parameters, such as the elimination rate constant (k), half-life (t1/2), and the apparent volume of distribution (Vd), can be estimated from this model. The elimination rate is calculated...
494
00:54Noncompartmental Analysis: Miscellaneous Pharmacokinetic Parameters
194
The noncompartmental approach is a widely used method in pharmacokinetics to assess drugs' behaviors in the body. It considers several factors, including clearance, bioavailability, and total volume of distribution.
One key aspect of the noncompartmental approach is determining a drug's total clearance. This can be done by dividing the drug dose by the area under the concentration-time curve from zero to infinity. The area under the concentration-time curve represents the drug's...
One key aspect of the noncompartmental approach is determining a drug's total clearance. This can be done by dividing the drug dose by the area under the concentration-time curve from zero to infinity. The area under the concentration-time curve represents the drug's...
194
01:15Drug Concentration Versus Time Correlation
1.2K
The plasma drug concentration-time curve is a crucial tool in pharmacokinetics, representing the drug's concentration in plasma at different time intervals post-administration. This curve illustrates the drug's journey from absorption into the systemic circulation, distribution to body tissues, and eventual elimination through excretion or biotransformation.
Two pivotal parameters are the minimum effective concentration (MEC) and the minimum toxic concentration (MTC). The MEC is the...
Two pivotal parameters are the minimum effective concentration (MEC) and the minimum toxic concentration (MTC). The MEC is the...
1.2K