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Related Experiment Videos

Lung function measurement in awake young children

H Bisgaard1, B Klug

  • 1Dept of Pediatrics, National University Hospital, Rigshospitalet, Copenhagen, Denmark.

The European Respiratory Journal
|December 1, 1995
PubMed
Summary
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New lung function monitoring methods, including impedance measurements (ZIOS) and interrupter technique (Rint), are sensitive for detecting changes in young children with suspected asthma. These techniques, along with transcutaneous oxygen (Ptc,O2), offer convenient clinical monitoring for airway diseases.

Area of Science:

  • Pediatric Pulmonology
  • Respiratory Physiology
  • Clinical Diagnostics

Background:

  • Monitoring lung function in young children presents challenges.
  • Assessing airway obstruction and bronchial tone requires sensitive, clinically applicable methods.

Purpose of the Study:

  • To evaluate the clinical applicability and sensitivity of impedance measurements (ZIOS), interrupter technique (Rint), and transcutaneous oxygen (Ptc,O2) for monitoring lung function changes in young children.
  • To compare these methods against standard techniques like specific airway resistance (sRaw) and forced expiratory volume in one second (FEV1) during methacholine challenge.

Main Methods:

  • A methacholine challenge was performed on 21 children (4-6 years) with suspected asthma.
  • Lung function was simultaneously measured using ZIOS, Rint, Ptc,O2, sRaw (whole body plethysmography), and FEV1 (spirometry).

Related Experiment Videos

  • A specialized mask ensuring mouth breathing was utilized.

    • Main Results:

    • The sensitivity order for detecting methacholine-induced changes was ZIOS > sRaw > Ptc,O2 > FEV1 > Rint.
    • ZIOS demonstrated significantly higher sensitivity than all other methods.
    • ZIOS, sRaw, and Rint detected subclinical bronchial muscle tone changes, unlike Ptc,O2 and FEV1.

    Conclusions:

    • ZIOS, Rint, and Ptc,O2 provide convenient and sensitive indices of lung function changes in young children.
    • These methods correlate with standard measures (sRaw, FEV1) during methacholine challenge.
    • Combined use of ZIOS, Rint, and Ptc,O2 is valuable for monitoring pediatric airway diseases.