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Lung function and bronchial hyper-responsiveness 11 years after hospitalization for bronchiolitis

M K Hyvärinen1, A Kotaniemi-Syrjänen, T M Reijonen

  • 1Department of Paediatrics, Kuopio University and Kuopio University Hospital, Kuopio, Finland. ylinen@hytti.uku.fi

Acta Paediatrica (Oslo, Norway : 1992)
|September 21, 2007
PubMed

Insights

Infants hospitalized for respiratory syncytial virus (RSV) bronchiolitis may experience reduced lung function. Early atopy and maternal smoking are linked to later bronchial hyper-responsiveness (BHR) in children.

Area of Science:

  • Pediatric Pulmonology
  • Allergy and Immunology
  • Epidemiology

Background:

  • Infants hospitalized for wheezing, particularly those with atopy and not caused by respiratory syncytial virus (RSV), face a higher risk of developing asthma later in life.
  • Bronchiolitis in infancy is a significant risk factor for subsequent respiratory issues, including asthma and abnormal lung function.

Purpose of the Study:

  • To evaluate early risk factors for abnormal lung function and bronchial hyper-responsiveness (BHR) in children previously hospitalized for bronchiolitis during infancy.
  • To identify specific early indicators that predict long-term respiratory health outcomes in this vulnerable population.

Main Methods:

  • Longitudinal study of 81 children hospitalized for bronchiolitis before age two.
  • Assessment of lung function using flow-volume spirometry (FVS) and BHR via methacholine and exercise challenge tests at a median age of 12.3 years.
  • Retrospective analysis of early data including childhood atopy, viral etiology of bronchiolitis, and maternal smoking during pregnancy.

Main Results:

  • Respiratory syncytial virus (RSV) bronchiolitis was associated with a restrictive lung function pattern (reduced forced vital capacity).
  • Early sensitization to inhalant allergens and maternal smoking during pregnancy were significantly associated with exercise-induced BHR.
  • Early atopic dermatitis was linked to methacholine-induced BHR.

Conclusions:

  • RSV bronchiolitis in infancy is linked to persistent restrictive lung function abnormalities.
  • Early signs of atopy and exposure to maternal smoking during pregnancy are identified as potential contributors to the development and persistence of bronchial hyper-responsiveness (BHR).
Abstract

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