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Assessing the respiratory rate and rhythm for a complete minute is crucial for evaluating the breathing pattern. Even a minor increase in the patient's average respiratory rate, by as little as three to five breaths per minute, is an early and vital indicator of respiratory distress. Patients with a respiratory rate exceeding twenty-four breaths per minute require close monitoring to determine the physiological alterations. This careful observation is essential for prompt recognition and...
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Conducting Respiratory Oscillometry in an Outpatient Setting
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Validation of Previous Spirometric Reference Equations and New Equations.

Hye Sook Choi1, Yong Bum Park2,3, Hyoung Kyu Yoon4

  • 1Department of Internal Medicine, Kyung Hee University Medical Center, Seoul, Korea.

Journal of Korean Medical Science
|December 7, 2019
PubMed
Summary

New pulmonary function reference equations were developed for Koreans, showing better accuracy than Choi's equations. These findings are crucial for precise lung function assessment in the Korean population.

Keywords:
Predicted ValuesReference EquationsSpirometry

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Area of Science:

  • Pulmonary Medicine
  • Respiratory Physiology
  • Biostatistics

Background:

  • Pulmonary function interpretation relies on predicted values from reference equations.
  • Existing equations, like Choi's, lack validation for Korean populations.
  • Accurate reference equations are vital for diagnosing respiratory conditions.

Purpose of the Study:

  • To validate Choi's reference equations for Korean populations.
  • To develop new, accurate reference equations for pulmonary function in Koreans.
  • To compare the performance of different reference equations.

Main Methods:

  • Utilized data from the Korean National Health and National Examination Survey (KNHANES)-VI.
  • Enrolled healthy Korean adults (n=117) with normal spirometry and chest radiographs.
  • Developed new reference equations using linear regression and assessed reliability via Intraclass Correlation Coefficient (ICC).

Main Results:

  • Choi's reference equations showed significant differences between predicted and observed values in Koreans.
  • Newly developed equations demonstrated the lowest differences and highest goodness of fit.
  • Provided specific formulas for forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV₁) for Korean men and women.

Conclusions:

  • Choi's equations are less suitable for Korean populations due to observed discrepancies.
  • The newly developed reference equations offer improved accuracy for pulmonary function assessment in Koreans.
  • These new equations are recommended for clinical use in the Korean population.