A validation study of a device based on peripheral arterial tonometry for the detection of obstructive sleep apnoea in patients due to undergo bariatric surgery


Obstructive sleep apnoea (OSA) is a common condition affecting 2% of females and 4% of males in the general population rising to 70% in morbidly obese patients being worked up for bariatric surgery. Current screening methods for OSA involve wearing a number of sensors on the body and in the nose overnight. New technology using peripheral arterial tonometry (PAT) which measures changes in arterial tone using a finger mounted sensor has been found to determine the presence and severity of OSA with reasonable accuracy when compared to gold standard measurements. However, this technique has not previously been tested in the bariatric population. The aim of this study is to validate a device using PAT technology against the routinely used test. 53 morbidly obese patients referred as part of the bariatric surgery pathway will wear WatchPAT 300 and Embletta MPR simultaneously for a one night. The apnoea hypopnoea index measured by the two tests will be assessed for agreement.


None yet- study is ongoing