Polysomnography in hospitalized patients using a wireless wide area network

Area of Science:

• Medical technology
• Sleep medicine
• Inpatient care

Background:

• Sleep-disordered breathing and hypoxemia are common in hospitalized patients.
• Sleep apnea has significant cardiovascular, neurovascular, inflammatory, and metabolic consequences.
• Nasal continuous positive airway pressure can reverse many adverse effects of sleep apnea.

Purpose of the Study:

• To develop and evaluate a technique for performing polysomnography in hospitalized patients.
• To assess the feasibility of wireless data transmission for inpatient polysomnography.
• To facilitate early diagnosis and intervention for sleep apnea in a hospital setting.

Main Methods:

• A 16-channel polysomnography system was adapted for use in any hospital location.
• Wireless networking (801.11b) supplemented a hardwired local area network.
• Sleep technicians remotely adjusted parameters and controlled continuous positive airway pressure titration.
• HIPAA-compliant virtual private network allowed remote monitoring via the internet.

Main Results:

• Polysomnography was successfully performed on 51 inpatients (age 26-89) with high body mass index (mean 34.1 kg/m²).
• Cardiac and neurologic diseases were common indications for admission.
• No data acquisition disruptions occurred due to connectivity issues.
• Common deficiencies included reduced sleep time and rapid eye movement sleep.

Conclusions:

• Wireless polysomnography in hospitals expands traditional sleep lab capacity.
• This technique allows for early implementation of sleep apnea therapy.
• Establishing specific indications and standards for inpatient polysomnography is necessary.