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Related Concept Videos

Lung Capacity01:47

Lung Capacity

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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Breathing

The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...
Respiratory Volumes01:15

Respiratory Volumes

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...
Respiratory Volumes and Capacities01:22

Respiratory Volumes and Capacities

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...
Imaging Studies for Cardiovascular System III: X-Ray01:20

Imaging Studies for Cardiovascular System III: X-Ray

The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
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Gross Anatomy of the Lungs01:17

Gross Anatomy of the Lungs

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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Measurement of the Pressure-volume Curve in Mouse Lungs
09:49

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THE LUNG VOLUME IN HEART DISEASE.

C A Binger1

  • 1Hospital of The Rockefeller Institute for Medical Research.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary
This summary is machine-generated.

Patients with chronic cardiac disease exhibit altered lung volumes, with reduced vital capacity and increased residual air, especially during decompensation. These changes are linked to lung stiffness and capillary swelling.

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Area of Science:

  • Pulmonary physiology
  • Cardiology

Background:

  • Chronic cardiac disease often leads to dyspnea.
  • Understanding lung volume changes is crucial for managing cardiac patients.

Purpose of the Study:

  • To investigate lung volumes in chronic cardiac disease patients.
  • To compare lung volumes in patients versus normal subjects.
  • To analyze lung volume changes during different stages of cardiac decompensation.

Main Methods:

  • Studied lung volumes in chronic cardiac disease patients and normal subjects.
  • Analyzed relative and absolute lung volumes.
  • Compared lung volumes during compensated and decompensated states.

Main Results:

  • Patients showed smaller relative vital capacity and larger relative mid-capacity and residual air.
  • Absolute vital capacity was smaller, and residual air larger in patients compared to normals.
  • Decompensation led to decreased vital capacity, mid-capacity, and total capacity, with variable residual air changes.

Conclusions:

  • Chronic cardiac disease significantly alters lung volumes.
  • Changes in lung volumes correlate with disease severity and compensation status.
  • Lung volume alterations are influenced by opposing factors like lung stiffness and capillary engorgement.