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PubMed1990

Surgical therapy of obstructive sleep apnea in children with severe mental insufficiency.

Obstructive sleep apnea is the underlying cause of a variety of pediatric maladies, including pulmonary hypertension and failure to thrive. In children, unlike adults, obstruction secondary to lymphoid hyperplasia is often encountered; adenotonsillectomy restores airway patency. Patients who fail this procedure, such as children with cerebral palsy and associated muscular hypotonia, may face tracheotomies. We report on 10 pediatric patients with severe mental insufficiency and obstructive sleep apnea in whom palatal hypotonicity and lack of adenotonsillar hypertrophy was identified. Uvulopalatopharyngoplasty was performed in conjunction with adenotonsillectomy to enlarge the diameter of the nasopharyngeal inlet with successful resolution of the obstructive symptoms in eight patients. The remaining two children required more surgery. This procedure is presented as a possible alternative to tracheotomy in selected patients.

Child↗
PubMed1999

Cost-utility of three approaches to the diagnosis of sleep apnea: polysomnography, home testing, and empirical therapy.

BACKGROUND: Obstructive sleep apnea syndrome (OSAS) is usually diagnosed with overnight polysomnography in a sleep laboratory. Home sleep studies can be performed at lower cost, but results are somewhat less reliable. Bedside diagnosis of OSAS without any testing has also been discussed. OBJECTIVE: To model the costs and utility of laboratory polysomnography, home study, and no testing during the 5 years after initial evaluation for OSAS. DESIGN: Cost-utility analysis. DATA SOURCES: Published data. TARGET POPULATION: Hypothetical cohort of persons suspected of having OSAS. TIME HORIZON: The 5 years after initial evaluation for OSAS. PERSPECTIVE: Societal. INTERVENTION: Nasal continuous positive airway pressure when OSAS was diagnosed. MEASUREMENTS: Quality of life, survival and charges (as proxies for costs) for each diagnostic method. RESULTS OF BASE-CASE ANALYSIS: Under almost all modeled conditions, polysomnography provided maximal quality-adjusted life-years in the 5 years after the initial diagnostic evaluation. The incremental charges for polysomnography over home study or no testing were about $13,400 and $9200, respectively, per quality-adjusted life-year gained during this period. RESULTS OF SENSITIVITY ANALYSIS: Results were sensitive to the utility of treatment in the absence of OSAS. CONCLUSIONS: The cost-utility of polysomnography instead of home study or no testing in the diagnosis of OSAS compares favorably with that of other procedures for which society judges the added utility per dollar spent to be worthwhile. More precise determination of certain key variables in this model should be a goal of future research.

Cost-Benefit Analysis↗
PubMed2001

[An investigation of therapeutic effectiveness and the mechanism of oral appliance therapy on obstructive sleep apnea syndrome].

In order to investigate the effectiveness and the mechanism of action of oral appliances (OA) on obstructive sleep apnea syndrome (OSAS), a series of studies including overnight polysomnography, both ultrafast MRI and measurement of intraesophageal pressure during daytime naps and cephalometric analysis while awakening were performed on 19 OSAS patients before and during the treatment. In all cases, a significantly decreased apnea hypopnea index (AHI), shortened apnea duration, and a significant elevation in the lowest value of nocturnal arterial oxygen saturation, in comparison with the pretreatment values, were recognized during treatment with OA. The number of patients who responded to OA treatment, i.e., those whose AHI decreased by more than 50% of the pretreatment value, was 13 (68.4%). In cases with an AHI of 30 per hour of sleep or more before treatment, the number of arousals decreased and the percentage in stage 3 + 4 increased significantly during the use of OA. Cephalometric analysis revealed the anteroinferior advancement of the mandible, the anterosuperior movement of the hyoid bone and increase of upper airway area with OA in the cases studied. An MRI of the upper airway during sleep showed that glossopharyngeal obstruction disappeared with the use of OA in all cases, and velopharyngeal obstruction disappeared in nearly half of the cases. Moreover, the fluctuation of the intraesophageal pressure during sleep decreased significantly with OA. There were no differences in clinical background (e.g., age, body mass index, pretreatment value of AHI, and upper airway characteristics) in patients who AHI had decreased to less than 50% and those in whom it remained over 50%. These results confirmed the effectiveness of the treatment with OA. OA can be recommended for OSAS patients with not only glossopharyngeal obstruction, but also velopharyngeal obstruction, which is the most common cause of OSAS.

Adult↗
PubMed1991

[Surgical therapy of obstructive sleep apnea syndromes: results of the Ulm treatment program].

The article reports on the results obtained by uvulopalatopharyngoplastic surgery (= UPPPS) in 31 patients suffering from obstructive sleep apnoea syndrome (= OSAS) and in 9 patients with habitual or obstructive snoring. All patients were subjected to thorough preoperative examination including rhinometry, nasopharyngeal video-endoscopy, radiocephalometry and polysomnography. In 8 out of 9 (89%) of the habitually snoring patients and in 17 of 31 (55%) of OSAS patients, surgery was successful. In these patients, a postoperative respiratory disturbance index (RDI) of less than 10 was recorded, whereas in 4 patients (13%) the postoperative RDI was between 10 and 15. Ten patients did not respond satisfactorily to UPPPS (32%). RDI was postoperatively still above 15. Analysis of patient data shows that almost all habitually snoring patients and the OSAS patients with slight overweight and low to medium apnoea index were successfully treated with UPPPS. In accordance with these results a treatment concept has been drawn up for OSAS patients that takes stock of all the possibilities and limitations of available conservative and surgical treatment methods.

Body Weight↗