利用机会主义临床研究和基于人口的药动力学模型,在重症患者中确定皮佩拉西林-塔扎巴克坦的合理实证剂量方案
Joshua A Reeder1, C Buddy Creech2, Roger L Nation3
1Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, University of Iowa, Iowa City, IA, USA.
Journal of clinical pharmacology
|December 4, 2024
概括
在重症患者中优化皮佩拉-塔扎巴克坦的剂量至关重要. 持续输液提供更高的目标实现概率 (PTA),根据功能推特定的每日剂量,以对抗Pseudomonas aeruginosa.
科学领域:
- 药理学 药理学是指药理学的学科.
- 关键护理医学 关键护理医学
- 传染性疾病 传染性疾病
背景情况:
- 在重症患者中,piperacillin-tazobactam的剂量因显著的药理动力学变化而复杂.
- 重症患者的病理生理变化改变了药物的分发和排泄.
- 有效的剂量是确保治疗成功和打击耐药病原体的必要条件.
研究的目的:
- 在重症患者中描述piperacillin-tazobactam的药理动力学 (PK).
- 确定最佳的剂量方案,以达到药物度的目标.
- 评估各种剂量策略实现目标 (PTA) 的概率.
主要方法:
- 一项前性临床研究,涉及112名重症患者.
- 机会性抽样和人口PK建模.
- 蒙特卡洛模拟以评估PTA在不同的输液策略和功能水平下.
主要成果:
- 对于这两种药物来说,开发了零顺序输入和第一顺序淘汰的单间模型.
- 瘦身体重,肌素清除率 (CLcr) 和连续脏替代疗法 (CRRT) 是显著的共同变量.
- 与间歇和延长输注相比,连续输注显示了更高的PTA.
结论:
- 建议对重症患者进行持续输注piperacillin-tazobactam,根据CLcr进行剂量调整.
- 持续输液的建议每日剂量从6g到12g不等,取决于CLcr.
- 延长输液方案 (例如,3g q6h或4g q6h) 是实现特定PK/PD目标的可行替代方案.
相关概念视频
01:12Analysis of Population Pharmacokinetic Data
232
Analysis of population pharmacokinetic data involves studying the behavior of drugs within diverse populations to understand their pharmacokinetic parameters. Traditional pharmacokinetic methods typically involve collecting samples from a few individuals and estimating these parameters. While these methods are commonly used, they have limitations in capturing the variability in drug response among individuals or heterogeneous populations. Population pharmacokinetics is employed to address these...
232
01:26Pharmacokinetic Models: Comparison and Selection Criterion
38
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.
38
01:20Pharmacokinetic Models: Overview
582
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...
582
01:06Model Approaches for Pharmacokinetic Data: Distributed Parameter Models
56
Pharmacokinetic models are mathematical constructs that represent and predict the time course of drug concentrations in the body, providing meaningful pharmacokinetic parameters. These models are categorized into compartment, physiological, and distributed parameter models.
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...
56
00:59Model-Independent Approaches for Pharmacokinetic Data: Noncompartmental Analysis
44
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...
44
01:19One-Compartment Open Model for IV Bolus Administration: General Considerations
158
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,...
158