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Relationship between impulse oscillometry and spirometric indices in cystic fibrosis children

Ludovic Moreau1, Dominique Crenesse, Frederic Berthier

  • 1Pulmonary Function Tests laboratory, Department of Pediatrics, Hospital Archet II, University of Nice Sofia Antipolis, Nice, France. moreau.l@chu-nice.fr

Acta Paediatrica (Oslo, Norway : 1992)
|May 28, 2009
PubMed

Insights

Impulse oscillometry (IOS) showed poor correlation with spirometry in cystic fibrosis (CF) children. IOS measurements lacked the sensitivity to effectively detect or monitor bronchial obstruction in these patients.

Area of Science:

  • Pediatric Pulmonology
  • Respiratory Physiology

Background:

  • Cystic Fibrosis (CF) necessitates sensitive lung function monitoring.
  • Impulse Oscillometry (IOS) and spirometry are common lung function tests.

Purpose of the Study:

  • To evaluate the relationship between IOS parameters and spirometry in children with CF.
  • To assess the utility of IOS in detecting and tracking bronchial obstruction in CF.

Main Methods:

  • Retrospective analysis of lung function tests (LFTs) in 30 CF children (aged 4-19).
  • IOS parameters included resistance (Rrs), reactance (Xrs), impedance (R5, X5, Zr), and resonant frequency (Fres).
  • Spirometry indices (SI) included FEV(1), FEF(25-75), and FVC.

Main Results:

  • Poor correlations were found between IOS parameters (R5, Zr, Fres) and spirometry indices (SI).
  • IOS parameters did not provide acceptable cutoff points for classifying lung function impairment.
  • IOS indices showed no consistent trend in tracking lung function changes over time, unlike spirometry's FEV(1).

Conclusions:

  • Impulse oscillometry demonstrates insufficient sensitivity for detecting and monitoring bronchial obstruction in pediatric CF patients.
  • Spirometry remains a more reliable tool for assessing lung function decline in this population.
Abstract

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