THE MOST COMMONLY USED INDICATOR OF SLEEP DISORDERED BREATHING (SDB) SEVERITY IS THE RESPIRATORY DISTURBANCE INDEX (RDI), WHICH IS SYNONYMOUS WITH THE APNEA HYPOPNEA INDEX (AHI) IN MANY REPORTS. The RDI is the total number of apneas and hypopneas per hour of sleep. In clinical populations, the RDI is used to define the presence of SDB and thus identify individuals who require treatment.1,2 In a...

OBJECTIVE To determine the accuracy of snoring and apnea analysis by SNAP (SNAP Laboratories; Glenview, IL), a technology that uses snoring recorded by a home microphone system and nasal airflow, to diagnose obstructive sleep apnea (OSA) as well as determine its severity. METHODS For all patients who had undergone a prior SNAP study and were referred to the Sleep Disorders Center of Lifespan ...

OBJECTIVES To investigate the indications for conducting polysomnography studies and their outcomes. METHODS Retrospective analysis of pediatric polysomnography studies performed over a four-year period (2009-2012). RESULTS 425 diagnostic studies and 100 non-invasive positive-pressure ventilation titration studies were conducted. Of these, 389 were performed in male children. Obstructive sl...

STUDY OBJECTIVES To evaluate the accuracy and practicality of the Apnea Risk Evaluation System (ARES; Advanced Brain Monitoring; Carlsbad, CA), a limited-channel system for diagnosing sleep apnea/hypopnea in the home. DESIGN Prospective randomized study with blinded analysis. SETTINGS Two independent, community-based, sleep-disorders centers and the participants' homes. PARTICIPANTS Two h...

BACKGROUND AND PURPOSE Sleep-related breathing disorders occur frequently after stroke. We assessed the feasibility of continuous positive airway pressure (CPAP) treatment initiated in the first night after stroke. METHODS In this open-label, parallel-group trial, 50 patients were randomly assigned to the CPAP therapy or to the control group. All patients underwent polysomnography in the four...

Melatonin is a pineal hormone that regulates the human cycle of sleep and wakefulness. Plasma melatonin levels were investigated in patients with obstructive sleep apnoea syndrome (OSAS). In total, 20 patients with OSAS and 11 healthy controls were studied. OSAS patients were tested twice: on the night of diagnostic polysomnography and the night of continuous positive airway pressure (CPAP) tit...

OBJECTIVE Sleep disorders in Parkinson's disease are very common. Polysomnography (PSG) is considered the gold standard for diagnosis. The aim of the present study is to assess the prevalence of nocturnal sleep disorders diagnosed by polysomnography and to determine the associated clinical factors. METHOD A total of 120 patients with Parkinson's disease were included. All patients underwent a...