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Polysomnographic studies in children with adenotonsillar hypertrophy and suspected obstructive sleep apnea
A Sanchez-Armengol1, F Capote-Gil, S Cano-Gomez
1Department of Pneumology, Virgen del Rocio University Hospital, Seville, Spain.
Insights
Short obstructive respiratory events in children with adenotonsillar hypertrophy significantly impact the apnea-hypopnea index and desaturations. These events are crucial for diagnosing obstructive sleep apnea syndrome (OSAS) in pediatric patients.
Area of Science:
- Pediatric Sleep Medicine
- Respiratory Physiology
- Otolaryngology
Background:
- Upper airway obstruction is linked to sleep-related breathing disorders, including obstructive sleep apnea syndrome (OSAS).
- Diagnosing OSAS in children presents challenges compared to adults, necessitating refined polysomnographic analysis.
- Adenotonsillar hypertrophy is a common cause of airflow obstruction in children, impacting sleep quality.
Purpose of the Study:
- To analyze polysomnographic patterns in children with symptomatic adenotonsillar hypertrophy.
- To evaluate the pathophysiological significance of obstructive respiratory events shorter than 10 seconds.
- To correlate clinical data with polysomnographic findings in pediatric adenotonsillar hypertrophy.
Main Methods:
- Overnight polysomnography was conducted on 12 children (mean age 4.5 years) with adenotonsillar hypertrophy.
- Data collected included total sleep time, sleep efficiency, desaturation index, and apnea-hypopnea (AH) episodes of varying durations (≤5 sec, ≥10 sec).
- Symptom severity was scored using a pre-study questionnaire; correlations between clinical and polysomnographic data were analyzed.
Main Results:
- Respiratory events lasting 5 seconds or longer increased the AH index and oxyhemoglobin desaturations.
- A significant relationship was observed between the AH index and AH episodes of ≥5 sec and ≥10 sec.
- No significant association was found between polysomnographic parameters and symptom severity scores.
Conclusions:
- Obstructive respiratory events of 5 seconds or longer are significant in pediatric OSAS evaluation.
- Short apneahypopnea episodes leading to hemoglobin desaturation are important diagnostic indicators in children.
- Current polysomnographic metrics may not fully correlate with subjective symptom severity in pediatric adenotonsillar hypertrophy.
Abstract:
Upper airway obstruction causes many sleep-related respiratory disorders that can culminate in obstructive sleep apnea syndrome (OSAS). Polysomnography is routinely used to define OSAS in adults, but problems remain in diagnosing children by this method. The current study was designed to analyze the polysomnographic patterns in children with symptomatic adenotonsillar hypertrophy and to determine whether obstructive respiratory events shorter than 10 sec could have pathophysiological significance. Furthermore, we analyzed the correlation between clinical data on children with adenotonsillar hypertrophy and polysomnographic findings. Twelve children (mean age, 4.5 +/- 1.5 years) with airflow obstruction due to adenotonsillar hypertrophy were observed in our Sleep Laboratory. Prior to study, a questionnaire was used to score symptom severity. Overnight polysomnography was then performed to measure total sleep time, sleep efficiency, desaturation index, minimal arterial oxygen saturation (SaO2), apneahypopnea (AH) episodes < or = 5 sec and those > or = 10 sec, and AH index, AH percentage of total test time, and number of spontaneous and respiratory event-associated desaturations were recorded. Respiratory events of 5 sec or longer resulted in increases in the AH index and an increase in the number of oxyhemoglobin desaturations due to respiratory events. A significant relationship was found between the AH index and AH episodes > or = 5 sec and > or = 10 sec. There was, however, no association between polysomnographic parameters and symptom severity scores. An appraisal of AH recordings > or = 10 sec showed that desaturation episodes were more frequent than respiratory events, and the desaturation index was closely related to spontaneous and respiratory event-associated desaturations. When considering all obstructive episodes > or = 5 sec, the number of desaturations did not exceed the number of respiratory events. The correlation between the desaturation index and spontaneous or respiratory event associated desaturations was similar. The occurrence of short AH episodes that lead to hemoglobin desaturation are important in the evaluation of OSAS in children.