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Related Experiment Videos

Partial effective time (teffp7): a new spirometric parameter for lung function assessment

G Tatsis1, J Jordanoglou

  • 1Pulmonary Department, Athens University, Greece.

The Journal of International Medical Research
|May 1, 1996
PubMed
Summary

A novel lung function measure, the effective time at the 60-70% part of forced vital capacity (teffp7), shows superior sensitivity for diagnosing airway obstruction and lung restriction compared to existing parameters.

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Area of Science:

  • Pulmonary Medicine
  • Respiratory Physiology

Background:

  • Lung function assessment is crucial for diagnosing respiratory diseases.
  • Existing spirometric parameters may have limitations in sensitivity for detecting subtle airway changes.

Purpose of the Study:

  • To evaluate a new spirometric parameter, teffp7, for its sensitivity in assessing lung function.
  • To compare the diagnostic capability of teffp7 against other established lung function parameters.

Main Methods:

  • Studied 79 subjects, including healthy individuals, patients with obstructive lung disease, pulmonary fibrosis, and bronchial asthma.
  • Utilized forced exhalation and Helium closed-circuit techniques to measure lung function parameters, including teffp7.
  • Assessed changes in lung function parameters, including teffp7, before and after bronchodilator administration in asthma patients.

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Main Results:

  • teffp7 demonstrated higher sensitivity than other parameters in identifying airway conditions in healthy subjects and those with obstruction.
  • teffp7 was more sensitive than other measures in patients with pulmonary fibrosis.
  • The change in teffp7 after bronchodilatation was significantly greater than changes in other parameters in asthma patients.

Conclusions:

  • teffp7 is a sensitive index for diagnosing airway obstruction and lung restriction.
  • teffp7 shows significant changes after bronchodilatation, indicating its utility in assessing reversible airway disease.