Navigation Links
Infrared Imaging for Sleep Apnea Diagnosis Shows Promise
Date:10/23/2007

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 obtained through the conventional methods of sleep apnea diagnosis, including nasal pressure, nasal-oral thermistors, and capnography.

"The underlying principle of monitoring the relative changes in airflow based on the changing of the infrared heat signal is similar to that of the traditional thermistor," Dr. Murthy explained. "However, the biggest difference is that the thermistor is placed in the subject's nostril while the infrared camera is placed 6 to 8 feet from the patient's head. Also, this method allows us to have recorded data, so we can go back and extract the airflow data after the completion of the study, which we can't do with conventional sensors."

Upon completion, results showed that IR-I detected 20 sleep-disordered breathing events, compared with 22 events detected by the nasal-oral thermistor, and 19 events detected by nasal pressure. Given the outcome, researchers suggest that IR-I was in near-perfect agreement with conventional methods and that it represents a noncontact alternative to standard nasal-oral thermistors. Though Dr. Murthy acknowledges that this study represents a preliminary stage of testing, he is optimistic about the future of infrared imaging for sleep disorder diagnosis.

"The results from this study will greatly impact the development of this technology," he said. "While implementation of this technology for clinical studies is still far away, these early results are encouraging enough for us to pursue this further."

"Sleep apnea is a debilitating condition that affects millions of Americans and can lead to other, life-threatening illnesses," said Alvin V. Thomas, Jr., MD, FCCP, President of the American College of Chest Physicians. "It is important for physicians and researchers to continue to explore new diagnostic tools in order to detect and treat this sleep disorder at the earliest possible stage."

CHEST 2007 is the 73rd annual international scientific assembly of the American College of Chest Physicians, held October 20-25 in Chicago, IL. ACCP represents 17,000 members who provide patient care in the areas of pulmonary, critical care, and sleep medicine in the United States and throughout the world. The ACCP's mission is to promote the prevention and treatment of diseases of the chest through leadership, education, research, and communication. For more information about the ACCP, please visit the ACCP Web site at http://www.chestnet.org.


'/>"/>
SOURCE American College of Chest Physicians
Copyright©2007 PR Newswire.
All rights reserved

Related medicine news :

1. New Computerized Imaging Systems Help In Better Dental Treatment Planning
2. Micro-camera provides new breast imaging technique
3. New imaging technique for tracking Alzheimers
4. Imaging Modality That Might Help Diagnose Depression
5. Being Obese Increases Ones Risk Of A wrong Diagnosis During Medical Imaging
6. T-waves to sweep over imaging technology
7. Optical Imaging Added To Ultrasound To Improve Imaging Of Breast Cancer
8. Using Eyes As The Line Of Reference For Fetal Brain Imaging
9. Three In One Ultrasound Probe For 3-D Imaging Of Heart And Tissue Destruction Developed
10. Magnetic Resonance Imaging Can Now Be Used For Mind Reading
11. New Cardiac Angiography Technique For Improved Imaging Of Coronary Veins
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/27/2017)... ... June 27, 2017 , ... The Kelahan Agency, a ... to residents of southern New Hampshire, is teaming up with the New Horizons ... and homelessness in the region. , New Horizons for New Hampshire provides a ...
(Date:6/27/2017)... ... , ... Dr. Richard Amato, a respected periodontist in Monroe, CT, ... Implant Center of Connecticut. As part of the renovation, the cutting-edge practice added two ... to improve patient comfort while making it possible for Dr. Amato to provide even ...
(Date:6/27/2017)... ... 2017 , ... East Los Angeles dentist, Ramin Assili DDS , comments ... happens to a woman during pregnancy can have profound effects on a developing fetus, ... on a baby’s long-term health. This study, which was performed at the University of ...
(Date:6/26/2017)... California (PRWEB) , ... June 26, 2017 , ... ... of Male Fertility & Sexual Medicine Specialists, in collaboration with the Fertility Center ... for male fertility care: PESA (percutaneous epidydimal sperm aspiration) and TESA (percutaneous testicular ...
(Date:6/26/2017)... ... , ... LARKR™ , an innovative new smartphone app providing on-demand talk ... to join its online treatment platform. , Launching in just a few days, ... number of people in need nationwide, and to supplement their traditional practices. Joining this ...
Breaking Medicine News(10 mins):
(Date:6/8/2017)... , June 8, 2017   Responding to Heath ... and the death of singer Chris Cornell in ... Rights International offers a free online psychiatric ... consumers and families about psychotropic drug risks. ... who died from an accidental overdose, has called for tighter ...
(Date:6/7/2017)... Md. , June 7, 2017  Novavax, Inc., (Nasdaq: ... second of two Phase 2 trials of its RSV F ... of child bearing age have been published in the journal ... publication have been shared in prior scientific conferences). The Company ... in April 2014. Novavax is developing the RSV F Vaccine ...
(Date:6/5/2017)... , June 5, 2017 Kohll,s Pharmacy ... the United States . The Raizer is ... a fallen person up to an almost-standing position ... and operated by one assistant and does not ... is simple enough that a child can operate it, ...
Breaking Medicine Technology: