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Conducting Respiratory Oscillometry in an Outpatient Setting
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Published on: April 8, 2022

Reference ranges for Mexican preschool-aged children using the forced oscillation technique.

Claire Shackleton1, Albino Barraza-Villarreal, Linping Chen

  • 1Queensland Children's Medical Research Institute, The University of Queensland, Brisbane, Australia. c.shackleton@uq.edu.au

Archivos De Bronconeumologia
|April 17, 2013
PubMed
Summary

New lung function reference ranges for Mexican children using the forced oscillation technique (FOT) are now available. Current FOT reference ranges overestimate lung function in this population, emphasizing the need for ethnic-specific data.

Keywords:
ChildrenForced oscillation techniqueMexicanMexicanoNiñosRangos de referenciaReference rangesTécnica de oscilación forzada

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Area of Science:

  • Pediatric Pulmonology
  • Respiratory Physiology

Background:

  • Multi-ethnic reference ranges for spirometry are established globally.
  • Forced oscillation technique (FOT) reference values are limited by equipment and specific populations, with existing ranges derived from Caucasian cohorts.
  • There is a need for ethnic-specific FOT reference ranges, particularly for diverse pediatric populations.

Purpose of the Study:

  • To establish FOT reference ranges for preschool-aged Mexican children.
  • To compare these new FOT reference ranges with existing Caucasian-based ranges.
  • To assess the impact of ethnic-specific data on lung function interpretation.

Main Methods:

  • Respiratory resistance (Rrs) and reactance (Xrs) were measured in 584 healthy Mexican children aged 3-5 years using commercial FOT equipment.
  • Regression analyses identified height as a significant predictor of Rrs and Xrs, accounting for age, weight, sex, and smoke exposure.
  • Z-scores were calculated using both newly derived Mexican equations and existing Australian reference equations for comparison.

Main Results:

  • Height was a significant predictor for both Rrs and Xrs at 6 and 8Hz (P<.05).
  • Existing Australian FOT reference equations significantly overestimated lung function (Rrs and Xrs at 6 and 8Hz) in the Mexican cohort (P<.001).
  • Successful FOT measurements were obtained in all 584 participating children.

Conclusions:

  • Developing FOT reference ranges specific to Mexican preschool-aged children is crucial for accurate lung function assessment.
  • Current FOT reference ranges derived from other ethnicities overestimate lung function in Mexican children.
  • The study underscores the critical importance of utilizing ethnically appropriate reference ranges for the correct interpretation of FOT measurements in pediatric populations.