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The Respiratory System01:16

The Respiratory System

83.3K
The respiratory system is comprised of the organs that enable breathing. Air enters the nostrils and mouth, followed by the pharynx (throat) and larynx (voice box), which lead to the trachea (windpipe). In the thoracic cavity, the trachea splits into two bronchi that allow air to enter the lungs. The bronchi split into progressively smaller bronchioles and terminate in small groups of tiny sacs in the lungs called alveoli, where gas exchange occurs.
83.3K
Respiratory Volumes and Capacities I01:26

Respiratory Volumes and Capacities I

1.2K
Assessing the respiratory rate and rhythm for a complete minute is crucial for evaluating the breathing pattern. Even a minor increase in the patient's average respiratory rate, by as little as three to five breaths per minute, is an early and vital indicator of respiratory distress. Patients with a respiratory rate exceeding twenty-four breaths per minute require close monitoring to determine the physiological alterations. This careful observation is essential for prompt recognition and...
1.2K
Overview of Respiratory System01:23

Overview of Respiratory System

4.9K
The respiratory system is a complex biological apparatus that facilitates the exchange of gases, specifically oxygen and carbon dioxide, between our bodies and the environment. This system plays a vital role in the physiological process of respiration, an essential function for sustaining life.
What is the Respiratory System?
The respiratory system consists of a series of organs responsible for taking in oxygen and expelling carbon dioxide. The primary function of the respiratory system is to...
4.9K
Respiratory Volumes01:15

Respiratory Volumes

1.7K
Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...
1.7K
Respiratory Volumes and Capacities01:22

Respiratory Volumes and Capacities

2.7K
The respiratory system is responsible for the intake of oxygen and the expulsion of carbon dioxide from the body. Respiratory volumes describe the volume of air in the lungs at different phases of the respiratory cycle. Tidal volume is the air breathed in and out during normal, quiet breathing. Inspiratory reserve volume is the air that can be forcefully inspired beyond the tidal volume. In contrast, expiratory reserve volume refers to the air that can be expelled from the lungs after a normal...
2.7K
Respiratory Capacities01:24

Respiratory Capacities

885
Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases.
One key metric is the Inspiratory Capacity (IC), which represents the maximum amount of air that can be inhaled with full effort. IC is calculated by summing the tidal volume and inspiratory reserve volume, typically ranging from 2.4 to 3.6 liters.
The Functional Residual Capacity (FRC) represents the air in the...
885

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Related Experiment Video

Updated: Sep 12, 2025

Evaluating Regional Pulmonary Deposition using Patient-Specific 3D Printed Lung Models
07:56

Evaluating Regional Pulmonary Deposition using Patient-Specific 3D Printed Lung Models

Published on: November 11, 2020

4.4K

Human respiratory simulation based on 3D modelling - a review.

Elena Lucania1, Pietro Piazzolla1, Michele Bertolini1

  • 1Department of Mechanical Engineering, Politecnico di Milano, Milano, Italy.

Journal of Medical Engineering & Technology
|August 9, 2025
PubMed
Summary
This summary is machine-generated.

This review analyzes respiratory dynamics modeling for pulmonary disease diagnosis and treatment. Combining detailed lung models with dynamic simulations, especially Computational Fluid Dynamics and Fluid-Structure Interaction, enhances clinical interventions.

Keywords:
Computational fluid dynamics (CFD)Fluid–Structure Interaction (FSI)Lung insufflation–exsufflationPatient-specific modelingTracheobronchial tree

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Area of Science:

  • Biomedical Engineering
  • Computational Biology
  • Respiratory Medicine

Background:

  • Accurate simulation of respiratory dynamics is crucial for diagnosing and treating pulmonary diseases.
  • Current methodologies for modeling lung mechanics during breathing cycles (insufflation and exsufflation) are under review.
  • Focus is on airflow simulations within the tracheobronchial tree.

Purpose of the Study:

  • To review and analyze current methodologies for respiratory dynamics modeling.
  • To evaluate 45 selected studies based on modeling approaches, simulation techniques, boundary conditions, and clinical applicability.
  • To highlight the importance of integrating anatomical modeling with dynamic simulation frameworks for improved clinical interventions, particularly in lung surgery.

Main Methods:

  • A structured screening process identified 45 relevant studies.
  • Evaluation criteria included modeling approaches (DICOM segmentation, CAD-based, hybrid), simulation techniques (CFD, FSI, biomechanical, neural networks), boundary conditions, and clinical applicability.
  • Analysis focused on tracheobronchial tree airflow simulations.

Main Results:

  • Three main strategies for 3D tracheobronchial model generation were identified: DICOM segmentation, CAD-based geometries, and hybrid methods.
  • Computational Fluid Dynamics (CFD) is the most adopted simulation method, while Fluid-Structure Interaction (FSI) and hybrid CFD-FSI models offer higher physiological fidelity.
  • DICOM segmentation provides anatomical realism but limited depth; CAD and hybrid methods offer broader coverage but may reduce subject specificity.

Conclusions:

  • Combining detailed anatomical lung models with dynamic simulation frameworks is essential for advancing clinical interventions, especially in lung surgery.
  • Future research should integrate patient-specific imaging, advanced boundary conditions, and multiscale modeling for precise and scalable respiratory simulations.
  • Enhanced modeling capabilities will improve the diagnosis and treatment of pulmonary diseases.