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Related Experiment Videos

Pulmonary function testing: detection of invalid performance

S Schuldheisz1, B A Phillips, D T Berry

  • 1Department of Medicine, College of Medicine, University of Kentucky, Lexington, KY, USA.

The Journal of the Kentucky Medical Association
|June 5, 1998
PubMed
Summary
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Physicians and technicians struggle to detect poor effort during pulmonary function tests (PFTs). Many use non-standard criteria for PFT validity, highlighting a need for better detection methods.

Area of Science:

  • Pulmonary Medicine
  • Medical Diagnostics

Background:

  • Pulmonary function tests (PFTs) are crucial for diagnosing respiratory diseases.
  • Ensuring the validity of PFT results is essential for accurate diagnosis and treatment.
  • Suboptimal patient effort can significantly impact PFT accuracy.

Purpose of the Study:

  • To investigate physician and technician perceptions of PFT validity indicators.
  • To assess the prevalence of suboptimal effort detection and use of non-standard criteria in PFTs.
  • To identify factors influencing PFT result acceptability.

Main Methods:

  • Survey distributed to American Thoracic Society physician members and their technicians.
  • Data collected on perceived indicators of PFT validity, effort detection rates, and criteria for acceptability.

Related Experiment Videos

  • Analysis of responses from 50 physicians and 52 technicians.

    • Main Results:

    • Consistency of effort and curve shape/slope were deemed most important validity indicators.
    • A significant percentage of respondents reported detecting 75% or fewer instances of inadequate effort.
    • Many physicians and technicians utilized quantitative criteria beyond established guidelines.
    • A notable proportion believed patients with compensation or disability claims were more likely to exert suboptimal effort.

    Conclusions:

    • There is a perceived gap in detecting suboptimal effort during PFTs among healthcare professionals.
    • Current practices for determining PFT acceptability may not consistently adhere to established guidelines.
    • Further empirical research is recommended to understand and improve the detection of suboptimal effort in PFTs.