通过建模和模拟,确定儿科重症监护室中美罗的最佳剂量策略
Ronaldo Morales Junior1, Tomoyuki Mizuno1,2, Kelli M Paice1,3
1Division of Translational and Clinical Pharmacology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
The Journal of antimicrobial chemotherapy
|August 2, 2024
概括
针对重症儿童和年轻成年人,使用人口药理动力学模型确定了精确的美罗胺剂量. 这项研究提供了优化的剂量策略,以改善严重感染的治疗结果.
科学领域:
- 药理学 药理学是指药理学的学科.
- 临界护理医学 临界护理医学
- 儿科 儿科 儿科
背景情况:
- 梅洛对于严重感染至关重要,但由于药理动力学变异性,在重症患者中剂量具有挑战性.
- 优化美罗胺剂量对于儿童和年轻成人重症监护病房的有效治疗至关重要.
研究的目的:
- 在重症儿科和年轻成人患者中开发梅罗的种群药理学 (PPK) 模型.
- 建立基于证据的剂量建议,以改善这种脆弱人群中美罗的疗效.
主要方法:
- 从48名重症儿科和年轻成人患者收集前性数据和机会性血采样.
- 使用Monolix®开发PPK模型的非线性混合效应建模 (NLME).
- 蒙特卡洛模拟用于评估对敏感病原体的剂量方案 (MIC ≤ 2 mg/L).
主要成果:
- 开发了一种具有第一阶淘汰的两部分模型,其中包含了对体重的全米缩放.
- 肌素清除和液体平衡被确定为影响美罗胺清除和分布量的关键共变量.
- 模拟表明,通过3小时输液每8小时20毫克/公斤优化了目标的实现 (40% fT>MIC);对于更高的目标,需要持续输液.
结论:
- 一个强大的meropenem PPK模型成功地使用了来自重症儿科和年轻成人患者的真实数据来开发.
- 提供剂量建议,考虑个体患者的因素,如功能和液体状况.
- 这个模型和建议可以指导优化儿科和年轻成人重症监护机构的美罗胺治疗.
相关概念视频
01:26Pharmacokinetic Models: Comparison and Selection Criterion
64
Physiological and compartmental models are valuable tools used in studying biological systems. These models rely on differential equations to maintain mass balance within the system, ensuring an accurate representation of the dynamic processes at play.
Physiological models take a detailed approach by considering specific molecular processes. They can predict drug distribution, metabolism, and elimination changes, providing a comprehensive understanding of how drugs interact with the body.
Physiological models take a detailed approach by considering specific molecular processes. They can predict drug distribution, metabolism, and elimination changes, providing a comprehensive understanding of how drugs interact with the body.
64
01:20Pharmacokinetic Models: Overview
635
Pharmacokinetic models utilize mathematical analysis to achieve a detailed quantitative understanding of a drug's life cycle within the body. They are instrumental in simulating a drug's pharmacokinetic parameters, predicting drug concentrations over time, optimizing dosage regimens, linking concentrations with pharmacologic activity, and estimating potential toxicity.
There are three primary types of models: empirical, compartment, and physiological. Empirical models, with minimal...
There are three primary types of models: empirical, compartment, and physiological. Empirical models, with minimal...
635
01:15Two-Compartment Open Model: IV Infusion
213
A two-compartment model is a vital tool in pharmacokinetics, providing an essential understanding of drug behavior, especially for those administered via zero-order intravenous infusion. This model outlines two compartments: the central compartment, where elimination occurs, and the peripheral compartment.
The model illustrates the decrease in plasma drug concentration from the central compartment with a specific equation. It shows that under steady-state conditions, the drug's input rate...
The model illustrates the decrease in plasma drug concentration from the central compartment with a specific equation. It shows that under steady-state conditions, the drug's input rate...
213
01:25Clearance Models: Compartment Models
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Clearance measures drug elimination from the central compartment, including plasma and highly perfused organs like kidneys and liver. Its calculation varies depending on pharmacokinetic models and administration routes. The one-compartment model, for instance, portrays the pharmacokinetics of polar drugs such as aminoglycoside antibiotics administered intravenously and readily excreted in urine. In this case, clearance is influenced by the terminal rate constant (λz) and the total volume...
60
01:06Three-Compartment Open Model
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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...
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01:19One-Compartment Open Model for IV Bolus Administration: General Considerations
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The one-compartment model is a pharmacokinetic tool that models the body as a single, uniform compartment, facilitating the understanding of drug distribution and elimination. This model is particularly beneficial for intravenous (IV) bolus administration, where the drug rapidly circulates throughout the body.
The drug's presence in the body is defined by an equation representing the difference between the rates of drug entry and exit. Key parameters—elimination rate constant,...
The drug's presence in the body is defined by an equation representing the difference between the rates of drug entry and exit. Key parameters—elimination rate constant,...
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