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Related Concept Videos

Compartment Models: Single-Compartment Model01:14

Compartment Models: Single-Compartment Model

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The single-compartment model serves as a simplified representation of the human body. This model assumes that the body functions as a single, well-mixed open compartment. When a drug is administered intravenously, it enters the body and quickly distributes uniformly. The drug then undergoes biotransformation and elimination, ultimately leaving the body. The volume of this compartment is referred to as the apparent volume of distribution into which the drug can uniformly distribute. In this...
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Mechanistic Models: Overview of Compartment Models01:21

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Mechanistic models, a category encompassing both physiological and compartmental modeling, differ from empirical models' approaches to incorporating known factors about the systems being modeled. Empirical models describe data with minimal assumptions, while mechanistic models aim to provide a robust description of available data by specifying assumptions and integrating known factors about the system. Compartmental analysis is a key example of a mechanistic model in pharmacokinetics and...
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Multicompartment Models: Overview01:14

Multicompartment Models: Overview

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Multicompartment models are mathematical constructs that depict how drugs are distributed and eliminated within the body. They segment the body into several compartments, symbolizing various physiological or anatomical areas connected through drug transfer processes such as absorption, metabolism, distribution, and elimination.
These models offer a more comprehensive representation of drug behavior in the body than one-compartment models. They accommodate the complexity of drug distribution,...
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Compartment Models: Two-Compartment Model01:20

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The two-compartment model divides the body into central and peripheral compartments to account for varying blood perfusion rates among organs and tissues, affecting drug distribution. The central compartment includes blood and highly perfused tissues with rapid drug distribution, while the peripheral compartment contains tissues with slower drug distribution. After a single IV bolus dose, the drug concentration is high in plasma and low in tissues. The drug distribution between compartments...
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Model Approaches for Pharmacokinetic Data: Compartment Models01:14

Model Approaches for Pharmacokinetic Data: Compartment Models

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Compartmental analysis is a widely adopted approach to characterizing drug pharmacokinetics. It uses compartment models that conceptualize the body as a collection of reversibly communicating compartments, each representing a group of tissues exhibiting similar drug distribution characteristics. The movement rate of the drug between these compartments is typically described by first-order kinetics.
Two primary types of compartment models are recognized: mammillary and catenary. The more...
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One-Compartment Open Model for IV Bolus Administration: General Considerations01:19

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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,...
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Hybrid multi-zonal compartment modeling for continuous powder blending processes.

Pooja Bhalode1, Marianthi Ierapetritou2

  • 1Department of Chemical and Biochemical Engineering, Rutgers University, Piscataway, NJ, USA.

International Journal of Pharmaceutics
|April 26, 2021
PubMed
Summary

A new hybrid model improves powder mixing prediction in continuous pharmaceutical manufacturing. This computationally efficient approach enhances blend uniformity assessment for oral solid drug products.

Keywords:
Continuous powder blenderHybrid modelMulti-zonal compartmentalizationPeriodic sectionPowder mixing

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Area of Science:

  • Pharmaceutical Manufacturing
  • Chemical Engineering
  • Computational Modeling

Background:

  • Pharmaceutical industry modernization relies on emerging technologies for robust drug production.
  • Current limitations in experimental and modeling approaches hinder in-depth process understanding for oral solid dosage forms.
  • Discrete Element Modeling (DEM) offers potential but is computationally intensive for predictive modeling.

Purpose of the Study:

  • To develop a computationally efficient and mechanistically informed hybrid model for powder mixing in continuous blenders.
  • To address the limitations of existing modeling techniques for predicting powder dynamics in pharmaceutical manufacturing.
  • To enhance the understanding and quantification of blend uniformity in oral solid drug production.

Main Methods:

  • A multi-zonal compartment modeling approach was constructed using Discrete Element Modeling (DEM) data.
  • The hybrid model was applied to a periodic section of a continuous powder blender and then extended to the entire blender.
  • Model predictions were validated against experimental or simulation data.

Main Results:

  • The developed multi-zonal compartment model provides a computationally efficient alternative to traditional DEM.
  • The model accurately assesses powder mixing along axial and radial directions, crucial for blend uniformity.
  • The hybrid model demonstrates mechanistic insight into powder flow and mixing dynamics.

Conclusions:

  • The proposed hybrid modeling approach offers a practical solution for predictive modeling of powder mixing in continuous pharmaceutical manufacturing.
  • This computationally efficient model can be integrated into manufacturing flowsheets for real-time process monitoring and optimization.
  • The enhanced understanding of blend uniformity facilitates the production of regulation-compliant oral solid drug products.