Prevalence of Sleep Disordered Breathing

Prevalence of Sleep Disordered Breathing

A novel technique in identifying unspecified sleep apnea has been developed. This technique uses signals typical acquired from a bedside monitor that is found in critical care environments. Those signals are then processed by a sleep analysis algorithm to provide an Apnoea Hypopnea Index (AHI) score. This study is intended to determine whether the prevalence of sleep disordered breathing identification among patients in a Coronary Care Unit (CCU) using this novel approach is significantly different than using routine techniques.

This study will focus on inpatients diagnosed with coronary conditions. Specific eligibility criteria will include:

• Unstable angina
• Acute myocardial infarction
• Congestive heart failure Subjects enrolled in the study will be scored for sleep apnea using a novel approach designed by the sponsor. That score will not be used in the course of treatment. A follow-up call will determine whether the subject was identified for sleep disordered breathing during the hospital stay. A comparison will be done on the number of those identified with and without the use of the sleep scoring device.

Inclusion Criteria:

• Age equal to or greater than 18 years at time of consent
• Written informed consent
• Patients admitted to the intensive care unit if able to remove oxygen
• Patients admitted to telemetry and step-down floor that will not require oxygen
• Primary diagnosis (any of the following)
• Un-stable angina
• Acute myocardial infarction
• Congestive heart failure

Exclusion Criteria:

• Previously diagnosed sleep disordered breathing
• Inability to consent
• Pregnancy
• Intubation (no longer excluded after extubation)
• Oxygen therapy (no longer excluded after therapy ends)
• End-Stage renal disease
• End-Stage liver disease
• Terminal disorders other than cardiac
• Severe scoliosis
• Cervical spinal cord injuries
• Neuromuscular disorders
• Severe COPD as defined by prescription of home oxygen therapy
• Other unsuitable circumstances