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Effect of adenoidectomy on respiratory function: a randomised prospective study
P S Mattila1, S Hammarén-Malmi, A S Pelkonen
1Department of Otorhinolaryngology, Helsinki University Central Hospital, Helsinki, Finland. petri.mattila@hus.fi
Insights
Adenoidectomy did not increase the risk of asthma or allergies in children with recurrent ear infections. However, frequent respiratory infections in early childhood are linked to bronchial hyper-reactivity.
Area of Science:
- Pediatric Otolaryngology
- Pediatric Pulmonology
- Allergy and Immunology
Background:
- Recurrent otitis media in children is linked to an increased risk of childhood asthma.
- The role of adenoidectomy, a common childhood surgery, in the development of atopy and asthma-related respiratory changes is not well understood.
Purpose of the Study:
- To evaluate the impact of adenoidectomy on the development of atopy and respiratory function changes characteristic of asthma in children with recurrent otitis media.
Main Methods:
- A randomized controlled trial was conducted with 166 children aged 12-48 months with recurrent or persistent otitis media.
- Participants were randomized to receive tympanostomy tubes with or without adenoidectomy and followed for 3 years.
- Primary outcome was exercise-induced bronchoconstriction; secondary outcomes included bronchial inflammation (exhaled nitric oxide) and atopy (skin prick tests).
Main Results:
- Adenoidectomy did not significantly affect lung function, exercise-induced bronchoconstriction, exhaled nitric oxide, atopy development, or doctor-diagnosed asthma.
- Adenoidectomy did not prevent otitis media.
- Recurrent otitis media (≥4 episodes) in the first year was associated with abnormal exercise-induced bronchoconstriction and elevated exhaled nitric oxide, irrespective of adenoidectomy.
Conclusions:
- Adenoidectomy does not appear to promote asthma or allergies in children.
- Recurrent respiratory tract infections in early childhood are associated with an increased risk of bronchial hyper-reactivity.
Objective:
Risk of childhood asthma is increased in children with recurrent otitis media. This may be associated with recurrent respiratory tract infections in these children, but the role of adenoidectomy, a frequent operation during childhood, is unknown. Therefore, the role of adenoidectomy in the development of atopy and respiratory function changes characteristic of asthma was evaluated.
Design:
Randomised controlled study.
Setting:
Tertiary care centre.
Patients:
166 children aged 12-48 months who had recurrent or persistent otitis media and who were followed-up for 3 years after randomisation.
Intervention:
Randomisation to undergo insertion of tympanostomy tubes with or without adenoidectomy.
Main Outcome Measures:
The primary outcome measure was exercise-induced bronchoconstriction as evaluated by impulse oscillometry. The secondary outcome measures were bronchial inflammation as evaluated by exhaled nitric oxide and atopy as evaluated by skin prick tests. During the 3-year follow-up period otitis media episodes were documented in patient diaries.
Results:
Adenoidectomy did not significantly influence baseline lung function, exercise-induced bronchoconstriction, exhaled nitric oxide concentration, the development of positive skin prick tests, or doctor-diagnosed asthma. Adenoidectomy did not significantly prevent otitis media. Recurrent otitis media (>or=4 episodes) during the first follow-up year was associated with an abnormal exercise-induced bronchoconstriction (OR 6.62, 95% CI 1.27 to 34) and an elevated exhaled nitric oxide concentration (OR 3.26, 95% CI 0.98 to 10.8) regardless of adenoidectomy.
Conclusions:
Adenoidectomy did not promote asthma or allergy. Recurrent respiratory tract infections during early childhood are associated with the risk of bronchial hyper-reactivity.
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