background and objective: numerous anatomical abnormalities or pathological conditions can cause upper airway obstruction in obstructive sleep apnea syndrome (osas). muller’s maneuver (mm) is one of diagnostic modalities investigating the obstruction site in patients with osas. this study aimed to investigate the obstruction sites of patients with osas based on mm. materials and methods: this w...

background and objective: obstructive sleep apnea (osa) is defined as a sleep disordered breathing due to partial or complete obstruction of upper airways. this study aimed to investigate treatment outcomes and clinical complications among patients with osa who underwent upper airway surgery in clinical settings. materials and methods: all patients undergone upper airway surgery for osa were ca...

OBJECTIVE To determine clinical and baseline polysomnographic data on obstructive sleep apnoea secondary to adenotonsillar hypertrophy in Hong Kong Chinese children. DESIGN Prospective study. SETTING University teaching hospital, Hong Kong. PARTICIPANTS Fifty children (35 boys and 15 girls) suspected to have obstructive sleep apnoea were recruited between January 1999 and December 1999. ...

still remains the most fatal disease for those who fall a prey to it. Whether it is the circulatory, the respiratory or both mechanisms together which fail ultimately and bring about death, the essential defect, which really causes the disturbance, is either anoxaemia, toxaemia or very often both. As to what role anoxaemia plays in this disease, how to detect it and how best to deal with it, ha...

In recent years, there have been numerous reports addressing the relationship between sleep-disordered breathing (SDB) and hypertension (HTN). This study investigated the relationship between SDB and BP after controlling for age, gross obesity, and notably, antihypertensive medications. Sixty-seven men and women between 30 and 60 years of age and between 0.90 to 1.5 times ideal body weight were...

The Chiari malformation type I (CM-I) has been associated with sleep-disordered breathing, especially central sleep apnea syndrome. We report the case of a 44-year-old female with CM-I who was referred to our sleep laboratory for suspected sleep apnea. The patient had undergone decompressive surgery 3 years prior. An arterial blood gas analysis showed hypercapnia. Polysomnography showed a respi...

BACKGROUND Patients with obstructive sleep apnoea (OSA) have a number of upper airway structural abnormalities which may influence the resistance of the oral airway to airflow. There have been no systematic studies of the flow dynamics of the oral cavity in such patients. METHODS Inspiratory oral airway resistance to airflow (RO) was measured in 13 awake patients with OSA in both the upright ...

In this paper, an adaptive scheduling H∞ disturbance rejection controller is designed for a class of nonlinear Markov jump systems with nonhomogeneous Markov jump process, in which the transition probabilities are time-varying. To estimate and reject the disturbance, a disturbance observer is considered, such that a disturbance rejection state-feedback control law is designed. Under the designe...

Index Terms—sliding mode control, uncertainty and disturbance estimation, flexible joint. Abstract—This paper proposes sliding mode control based on uncertainty and disturbance estimator (UDE), for trajectory tracking control of flexible joint robotic system. UDE is used to estimate plant uncertainty and disturbances. The controller does not requires knowledge of plant uncertainty and external ...

Perfectionism, anxiety sensitivity and sleep disturbance are among the main causes of generalizing anxiety disorder. This study aims to compare perfectionism, anxiety sensitivity and sleep disturbance between patients with generalizing anxiety disorder (GAD) and control group. The present study was a cross-sectional and ex-post facto investigation (causal comparative method). Statistical univer...