Understanding airway pathophysiology with computed tomograpy

Research output: Contribution to journalArticle

Abstract

Conventional pulmonary function tests are limited in the mechanistic insight that they can provide by the fact that they can only provide average measures of lung function. For example, a measurement of decreased expiratory flow assessed with conventional spirometry could result from narrowed large airways, narrowed small airways, closed airways, altered elasticity, or regional heterogeneities in parenchyma or airways. To examine specific mechanisms and pathology in the airways, a method is required that can actually look at specific individual airways. Over the past decade, several more direct methods of assessing specific mechanisms and structural alterations in normal airways and airway pathology in asthma have become available for such purposes. One such method is high-resolution computed tomography (HRCT), a method that allows the study of multiple individual airways during either contraction to closure or relaxation in real time, as well as changes in airway size with changes in lung volume. Although other imaging modalities have the potential to image airways in vivo, none presently has the convenience and the accessibility coupled with the resolution required to visualize the parenchymal airways in vivo. Although HRCT may never be widely utilized for routine measurements or screening, because of radiation exposure, cost issues, and a limited ability to follow changes over extended time periods, the method has distinct and unique advantages in quantifying the behavior of airways in vivo. In this mini-review, we focus on these capabilities of HRCT by briefly reviewing highlights of experimental results from several canine and human studies.

Original languageEnglish (US)
Pages (from-to)854-862
Number of pages9
JournalJournal of Applied Physiology
Volume95
Issue number2
StatePublished - Aug 1 2003

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Tomography
Pathology
Lung
Aptitude
Spirometry
Respiratory Function Tests
Elasticity
Canidae
Asthma
Costs and Cost Analysis
Radiation Exposure

Keywords

  • Airway closure
  • Airway narrowing
  • Asthma
  • Deep inspiration
  • High-resolution computed tomography

ASJC Scopus subject areas

  • Physiology
  • Endocrinology
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Understanding airway pathophysiology with computed tomograpy. / Brown, Robert Howard; Mitzner, Wayne A.

In: Journal of Applied Physiology, Vol. 95, No. 2, 01.08.2003, p. 854-862.

Research output: Contribution to journalArticle

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