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Impulse oscillometry vs. body plethysmography in assessing respiratory resistance in children

Waldemar Tomalak1, Jakub Radliński, Jacek Pawlik

  • 1Department of Physiopathology of the Respiratory System, National Research Institute for Tuberculosis and Lung Diseases, Rabka Branch, Rabka, Poland. wtomolak@zpigichp.edu.pl

Pediatric Pulmonology
|October 7, 2005
PubMed

Insights

Impulse oscillometry (IOS) effectively measures respiratory resistance in children. Oscillometric R5 measurements correlate well with plethysmography, aiding in diagnosing obstructive lung diseases.

Area of Science:

  • Pediatric Pulmonology
  • Respiratory Physiology

Background:

  • Plethysmography is a standard method for assessing airway resistance.
  • Accurate respiratory assessment in children can be challenging due to cooperation issues.

Purpose of the Study:

  • To compare airway resistance measurements using plethysmography and impulse oscillometry (IOS) in children.
  • To evaluate the utility of IOS in diagnosing obstructive respiratory diseases in pediatric populations.

Main Methods:

  • Plethysmographic airway resistance (Raw) was compared with IOS-derived resistance (R5, R20, R35) in 334 children (aged 5-18).
  • Statistical correlation and Bland-Altman analyses were performed.
  • Patients were categorized into obstructed and non-obstructed groups based on FEV1%FVC.

Main Results:

  • All IOS resistance measures (R5, R20, R35) showed significant correlation with plethysmographic Raw.
  • R5 demonstrated the strongest correlation (r=0.64).
  • IOS R5 measurements showed good agreement with plethysmography, particularly in children with airway obstruction.

Conclusions:

  • Impulse oscillometry, especially R5, is a viable alternative to plethysmography for assessing respiratory resistance in children.
  • IOS requires less patient cooperation, making it suitable for pediatric use.
  • IOS shows promise for diagnosing obstructive respiratory conditions in children.

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