聚合物-接口-组织模型,以估计医疗器械的可漏释放量
Martin L Tanaka1, David M Saylor2, Robert M Elder2
1College of Engineering and Technology, Western Carolina University, Cullowhee, NC 28723, USA.
Mathematical medicine and biology : a journal of the IMA
|October 18, 2024
概括
预测医疗器械中的可漏化合物至关重要. 对于某些场景,双组件模型提供比单组件模型更准确的暴露预测,减少不必要的生物相容性测试.
科学领域:
- 生物材料科学 生物材料科学
- 化学工程是化学工程的重要组成部分.
- 医疗器械开发 医疗器械开发
背景情况:
- 评估医疗器械的生物相容性需要评估暴露于聚合物中的可浸化合物.
- 通过准确预测潜在的危险化合物暴露,可以减少当前的测试.
- 基于物理学的模型为预测可漏化合物暴露提供了一条途径.
研究的目的:
- 为了比较两个基于物理的暴露模型对聚合物医疗器械中的可浸化合物的预测准确度.
- 确定一个更复杂的两组件模型在哪些条件下比一个更简单的单组件模型提供更优异的暴露预测.
- 建立基于材料特性的模型参数,以实现广泛的应用.
主要方法:
- 一组件模型 (聚合物矩阵扩散) 与两组件模型 (聚合物扩散,聚合物-组织分离和组织扩散) 的比较.
- 用于根据材料特性 (可透化合物,聚合物,组织类型) 建立模型参数的文献数据.
- 在一系列临床相关情景中分析模型预测.
主要成果:
- 两种模型都显示了许多临床相关场景的类似预测.
- 两组件模型预测,在分区较低或组织扩散缓慢的系统中,质量释放明显较低 (高达三次数).
- 模型参数成功地与材料属性联系在一起,允许应用于各种系统.
结论:
- 双组分暴露模型在涉及低分区或缓慢组织扩散的特定场景中为可浸出物质提供了更具临床相关性的估计.
- 虽然更复杂,但双组件模型可以有利于准确的暴露评估,可能优化生物相容性测试.
- 准确预测漏性化合物暴露是提高医疗器械安全性和降低开发成本的关键.
相关概念视频
Clearance Models: Physiological Models
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The organ's clearance rate depends on the blood flow to the organ and the extraction ratio (E). The extraction ratio describes the organ's proficiency in drug...
The organ's clearance rate depends on the blood flow to the organ and the extraction ratio (E). The extraction ratio describes the organ's proficiency in drug...
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Clearance Models: Noncompartmental Models
Clearance is a pharmacokinetic parameter traditionally defined by compartment models, signifying the rate at which a drug is expelled from the body. However, a noncompartmental model offers an alternative method for assessing clearance, primarily employing empirical data obtained after administering a single drug dose.
The noncompartmental approach capitalizes on extensive sampling data, correlating the volume of distribution to systemic exposure and the administered dosage. This method enables...
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One-Compartment Open Model for IV Bolus Administration: Estimation of Clearance
Clearance is a key pharmacokinetic parameter that quantifies the volume of body fluid from which a drug is entirely removed within a specific time frame. It is crucial in assessing how a drug is eliminated from the body and has critical clinical applications.
In the one-compartment open model for intravenous (IV) bolus administration, clearance is estimated by dividing the elimination rate by the plasma drug concentration. This equation leverages the elimination rate constant and the apparent...
In the one-compartment open model for intravenous (IV) bolus administration, clearance is estimated by dividing the elimination rate by the plasma drug concentration. This equation leverages the elimination rate constant and the apparent...
One-Compartment Open Model: Urinary Excretion Data and Determination of k
The one-compartment open model leverages urinary excretion data to estimate renal clearance, which gauges the kidney's capacity to expel a drug. This method offers several benefits, including directly measuring drug elimination and assessing the kidney's contribution to overall drug clearance. However, this approach has limitations. It assumes sole renal excretion of the drug, which is not true for all drugs. Accurate urinary excretion and plasma drug concentration measurement can also be...
Three-Compartment Open Model
The three-compartment open model is a pharmacokinetic model used to describe the distribution and elimination of drugs following extravascular administration. It comprises a central compartment representing the plasma and two peripheral compartments. The highly perfused peripheral compartment represents organs and tissues with a rich blood supply, such as the liver, kidneys, and lungs. The scarcely perfused peripheral compartment represents tissues with lower blood supply, such as adipose...


