Remote Heat Imaging Identifies Sleep Disorder Without Disturbing Patients
CHICAGO, Oct. 23 /PRNewswire/ -- Sleep apnea is commonly diagnosed by way of measuring airflow by nasal pressure, temperature, and/or carbon dioxide, through sensors placed in the nose. However, this method is uncomfortable to some and can potentially disturb sleep. But new research, presented at CHEST 2007, the 73rd annual international scientific assembly of the American College of Chest Physicians (ACCP), shows that remote infrared imaging can monitor airflow and accurately detect abnormalities during sleep, without ever coming in contact with the patient. The study indicates that the new method is ideal because it is portable and can monitor sleep in a natural environment.
"Polysomnography is a diagnostic test, which establishes the presence or absence of sleep disorders. But standard methods have the potential to significantly disturb a patient's sleep pattern, so what we see in the lab may not be a true representation of the patient's sleep habits," said lead study author Jayasimha Murthy, MD, Assistant Professor of Medicine, University of Texas Health Science Center at Houston, TX. "However, remote infrared imaging is a noncontact method, so there is minimal interference with the patient. In fact, this system can be designed to where the patient isn't even aware that monitoring is taking place."
In the first study of its kind, Dr. Murthy and his colleagues from the
University of Texas Health Science Center at Houston, the University of
Houston, and Memorial Hermann Sleep Disorders Center in Houston, TX,
evaluated the efficacy of remote infrared imaging (IR-I) in 13 men and
women without known sleep apnea. Researchers recorded the heat signals
expired from patients' nostrils or mouth using an infrared camera during 1
hour of polysomnography. To minimize any bias, airflow channels were
recorded and analyzed separately. Results were then compared with those
|SOURCE American College of Chest Physicians|
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