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Airway resistance and allergic sensitization in children with obstructive sleep apnea hypopnea syndrome
Jie Zhang1, Jing Zhao1, Min Chen1
1Department of Otorhinolaryngology, Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Beijing Children's Hospital, Head and Neck Surgery Beijing Pediatric Research Institute, Capital Medical University, Beijing, P. R. China.
Insights
Total airway resistance is elevated in children with obstructive sleep apnea hypopnea syndrome (OSAHS). Allergic sensitization may worsen OSAHS severity in pediatric patients, warranting further research.
Area of Science:
- Pediatric Pulmonology
- Sleep Medicine
- Allergy and Immunology
Background:
- Obstructive sleep apnea hypopnea syndrome (OSAHS) is a common condition in children.
- Airway resistance and allergic sensitization are potential factors influencing OSAHS severity.
Purpose of the Study:
- To measure airway resistance in Chinese children with OSAHS using impulse oscillometry (IOS).
- To investigate the relationship between OSAHS severity, airway resistance, and allergic sensitization.
Main Methods:
- 120 children were assessed, with 93 diagnosed with OSAHS.
- Airway resistance (R5, R20, X5) was measured by IOS.
- Serum total IgE and allergen-specific IgE (sIgE) levels were determined.
Main Results:
- Total airway resistance (R5) was significantly higher in children with OSAHS compared to controls.
- R5 correlated positively with OSAHS severity indices (AHI, OAI) and negatively with oxygen saturation.
- Increased R5 and total IgE were more prevalent in severe OSAHS cases.
Conclusions:
- Children with OSAHS exhibit significantly increased total airway resistance.
- Allergic sensitization may contribute to the exacerbation of pediatric OSAHS.
- Further large-scale studies are needed to confirm these findings.
Objective:
The purpose of this study was to determine the airway resistance in Chinese children with obstructive sleep apnea hypopnea syndrome (OSAHS) by impulse oscilloetry (IOS) and investigate the association of the severity of OSAHS with the airway resistance and allergic sensitization.
Method:
A total of 120 children (92 boys) treated for snoring in Beijing Children's Hospital between October 2010 and March 2011 were included in this study. Ninety-three children were diagnosed with OSAHS and 27 did not show OSAHS. Total airway resistance (R5), proximal airway resistance (R20), and peripheral airway resistance (X5) were determined by IOS. Serum levels of total IgE and allergen-specific IgE (sIgE) were also determined.
Results:
R5 in the OSAHS group was significantly higher than that in the non-OSAHS group (P = 0.0025), whereas R20 and X5 were similar in the two groups. R5 was positively correlated with apnea hypopnea index and obstructive apnea index and negatively correlated with the lowest arterial oxygen saturation significantly (all P < 0.05). The percentage of children with abnormal serum levels of total IgE or abnormal allergen-specific IgEs was comparable in OSAHS and non-OSAHS groups. The proportions of abnormal R5 and of abnormal serum levels of total IgE were significantly higher in children with severe OSAHS compared with children with mild or moderate OSAHS (all P < 0.05).
Conclusions:
Total airway resistance was significantly increased in Children with OSAHS. Allergic sensitization might contribute to the exacerbation of existing OSAHS in children. Large scale studies are required to further validate these findings.
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