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Related Concept Videos

Lung Capacity01:47

Lung Capacity

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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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Oxidation-Reduction Reactions03:11

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Constant Volume Calorimetry02:41

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Calorimeters are useful to determine the heat released or absorbed by a chemical reaction. Coffee cup calorimeters are designed to operate at constant (atmospheric) pressure and are convenient to measure heat flow (or enthalpy change) accompanying processes that occur in solution at constant pressure. A different type of calorimeter that operates at constant volume, colloquially known as a bomb calorimeter, is used to measure the energy produced by reactions that yield large amounts of heat and...
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Volume of Distribution01:20

Volume of Distribution

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The apparent volume of distribution (Vd) is a crucial pharmacokinetic parameter representing the hypothetical body fluid volume into which a drug disperses. It is calculated based on the total amount of drug in the body (estimated from the administered dose and bioavailability) divided by the plasma drug concentration. The total amount of drug in the body does not directly refer to the dose given but is derived by accounting for absorption, distribution, metabolism, and excretion processes.
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Problem Solving: Volume01:13

Problem Solving: Volume

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The volume of a fuel tank mounted on the wing of a jet aircraft can be modeled using the concept of solids of revolution. In this case, the tank is formed by rotating a two-dimensional region, defined by a mathematical function, about the x-axis. The region extends along the axis from zero to two meters, and the resulting three-dimensional shape is symmetric about the axis of rotation. Because the boundary curve lies directly against the axis, the disk method is an appropriate technique for...
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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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Related Experiment Video

Updated: Feb 5, 2026

Measurement of the Pressure-volume Curve in Mouse Lungs
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Lung volume reduction surgery or bronchoscopic lung volume reduction: is there an algorithm for allocation?

Matthew Gordon1, Sean Duffy1, Gerard J Criner1

  • 1Department of Thoracic Medicine and Surgery, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, USA.

Journal of Thoracic Disease
|September 14, 2018
PubMed
Summary

Lung volume reduction can improve outcomes for patients with severe Chronic Obstructive Pulmonary Disease (COPD). Both surgical and bronchoscopic lung volume reduction (BLVR) offer benefits, with careful patient selection crucial for success.

Keywords:
Lung volume reduction surgery (LVRS)bronchoscopic lung volume reduction (BLVR)chronic obstructive pulmonary disease (COPD)endobronchial coilendobronchial valve (EBV)hyperinflation

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Area of Science:

  • Pulmonology
  • Thoracic Surgery
  • Respiratory Medicine

Background:

  • Chronic Obstructive Pulmonary Disease (COPD) is a leading cause of global mortality.
  • Air-trapping in COPD exacerbates respiratory and cardiac dysfunction, increasing morbidity and mortality.
  • Reducing lung hyperinflation can significantly improve cardiopulmonary function.

Purpose of the Study:

  • To review the selection criteria, risks, and benefits of surgical lung volume reduction (LVRS) and bronchoscopic lung volume reduction (BLVR).
  • To provide guidance for treatment decisions in COPD patients based on current literature.

Main Methods:

  • Review of current literature on LVRS and BLVR for COPD.
  • Analysis of patient selection criteria, procedural risks, and reported benefits.
  • Synthesis of evidence to inform treatment recommendations.

Main Results:

  • LVRS has shown improvements in symptom burden and mortality in selected COPD patients with an emphysema phenotype.
  • Minimally invasive BLVR techniques demonstrate improvements in lung function, dyspnea, and quality of life.
  • Effective patient selection is critical for optimizing outcomes for both surgical and bronchoscopic interventions.

Conclusions:

  • Lung volume reduction, through either surgical or bronchoscopic approaches, offers a viable treatment option for select COPD patients.
  • BLVR provides a less invasive alternative with demonstrated benefits in lung function and quality of life.
  • Evidence-based recommendations are essential for guiding the appropriate use of lung volume reduction therapies in COPD management.