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Related Concept Videos

Respiratory Volumes01:15

Respiratory Volumes

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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...
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Lung Capacity01:47

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The air in the lungs is measured in volumes and capacities. Lung volume measures reflect the amount of air taken in, released, or left over after a lung function, like a single inhalation. Lung capacity measures are sums of two or more lung volume measures.
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Gross Anatomy of the Lungs01:17

Gross Anatomy of the Lungs

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The lungs are a pair of vital organs connected to the trachea via the left and right bronchi. The base of these organs meets the dome-shaped muscle known as the diaphragm. Encased by the pleurae, the lungs contact the mediastinum. The right lung is shorter yet wider, and has a larger volume than the left lung. The left lung has an indentation known as the cardiac notch. The superior region of the lungs is referred to as the apex, whereas the base is the lower region near the diaphragm. The...
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Pressure Relationships in Thoracic Cavity01:24

Pressure Relationships in Thoracic Cavity

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Breathing, otherwise known as pulmonary ventilation, is the process of air movement into and out of the lungs. The main mechanisms propelling pulmonary ventilation are atmospheric pressure (Patm), intra-pulmonary (Ppul ) or intra-alveolar pressure (Palv) within the alveoli, and intrapleural pressure (Pip) within the pleural cavity.
Breathing Mechanisms
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Respiratory Volumes and Capacities I01:26

Respiratory Volumes and Capacities I

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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...
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Respiratory Volumes and Capacities01:22

Respiratory Volumes and Capacities

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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...
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Related Experiment Video

Updated: Jan 15, 2026

A Standardized Method for Measuring Internal Lung Surface Area via Mouse Pneumonectomy and Prosthesis Implantation
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Difference in Lung Volume Changes Following Each Lobectomy.

Takamasa Shibazaki1, Shohei Mori1, Yuto Watanabe1

  • 1Department of Thoracic Surgery, Jikei University School of Medicine, Tokyo 105-8471, Japan.

European Journal of Cardio-Thoracic Surgery : Official Journal of the European Association for Cardio-Thoracic Surgery
|October 13, 2025
PubMed
Summary

Left upper lobectomy (LUL) involves larger lung volume resection but shows greater compensatory expansion compared to right upper lobectomy (RUL). This study clarifies lung volume changes after different lobectomy types.

Keywords:
3-dimensional computed tomographylobectomylung volumeresidual lung expansion

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Area of Science:

  • Thoracic surgery
  • Pulmonary function testing
  • Medical imaging analysis

Background:

  • Lobectomy is a common surgical procedure for lung diseases.
  • Understanding lung volume changes post-lobectomy is crucial for assessing functional recovery.
  • Different lobectomy types may lead to varying degrees of lung volume alteration.

Purpose of the Study:

  • To compare lung volume changes after different types of lobectomy.
  • To quantify resected lung volume and residual lung expansion following lobectomy.
  • To identify differences in lung volume dynamics based on the specific lobe resected.

Main Methods:

  • Retrospective analysis of 393 patients undergoing lobectomy.
  • Preoperative and 1-year postoperative lung volumes measured using 3D CT volumetry.
  • Calculation and comparison of resected lobe volume ratio and residual lung volume ratio across lobectomy types.

Main Results:

  • Left upper lobectomy (LUL) had higher resected and residual lung volume ratios compared to right upper lobectomy (RUL).
  • Right lower lobectomy (RLL) showed higher ratios than left lower lobectomy (LLL).
  • LUL demonstrated greater compensatory lung expansion than LLL, while RLL and RUL had comparable residual volumes.

Conclusions:

  • Left upper lobectomy results in larger resected lung volumes but greater compensatory residual lung expansion.
  • Significant differences exist in lung volume changes depending on the specific lobectomy performed.
  • These findings aid in predicting postoperative lung function and recovery patterns.