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BACKGROUND The mechanisms by which mandibular advancement splints (MAS) improve obstructive sleep apnoea (OSA) are not well understood. This study aimed to evaluate the mechanism of action of MAS by assessing their effect on upper airway structure in patients with OSA. METHODS Patients were recruited from a sleep disorders clinic for treatment with a(More)
STUDY OBJECTIVES To compare the efficacy of a mandibular advancement splint (MAS) and a novel tongue stabilizing device (TSD) in the treatment of obstructive sleep apnea (OSA). DESIGN A randomized crossover design was used. PATIENTS Twenty-seven patients (20 male, 7 female), recruited from a tertiary hospital sleep clinic. MEASUREMENTS AND RESULTS The(More)
Plasminogen knock-out (PG(-/-)) mice provide an unique opportunity for the study of alternative mediators of fibrinolysis. Polymorpho-nuclear leucocytes (PMNs) contain non-plasmin fibrinolytic proteases, however the degree to which these cells contribute to fibrin(ogen) degradation in these animals is not known. Thrombi were generated in carotid arteries(More)
It has been recognized that nasal airway resistance (NAR) is elevated in patients with OSA. However, little is known regarding the influence of nasal resistance on mandibular advancement splint (MAS) treatment outcome in OSA patient. We hypothesized that nasal resistance differs between MAS responders and nonresponders and therefore may influence treatment(More)
STUDY OBJECTIVES We hypothesized that the facial phenotype is closely linked to upper airway anatomy. The aim of this study was to investigate the relationship between surface facial dimensions and upper airway structures using magnetic resonance imaging (MRI) in subjects with obstructive sleep apnea (OSA). DESIGN Cohort study. SETTING Sleep(More)
BACKGROUND There are few economic evaluations of speech and language interventions. Such work requires underpinning by an accurate estimate of the costs of the intervention. This study seeks to address some of the complexities of this task by applying existing approaches of cost estimation to interventions described in published effectiveness studies. (More)
Although Warren, Fey and Yoder (2007) have described the key components of "dosage", one needs to go beyond description if one is to understand "optimal" dosage, specifically one needs to relate the characteristics of the intervention to the size of the intervention effect. This study examines the association between dose, intensity, and effect size in 20(More)
BACKGROUND Although economic evaluation has been widely recognized as a key feature of both health services and educational research, for many years there has been a paucity of such studies relevant to services for children with speech, language and communication needs (SLCN), making the application of economic arguments to the development of services(More)
The observed warming trend in the Qaidam area, an arid basin surrounded by high mountains, has caused land surface dynamics that are detectable using remotely sensed data. In this paper, we detected land-cover changes in the Qaidam Area between 1990 and 2003 in attempt to depict its spatial variability. The land-cover changes were categorized into two(More)
543 OBSTRUCTIVE SLEEP APNEA (OSA) IS CHARACTER‐ IZED BY RECURRENT NARROWING AND OCCLUSION OF THE UPPER AIRWAY DURING SLEEP, RESULTING IN sleep fragmentation and intermittent hypoxemia.1 In the context of the current epidemic of obesity, it has been estimated that ap‐ proximately 17% of adults have mild or worse OSA, and 5.7% have moderate or worse OSA.2 It(More)