The Science Journal of the American Association for Respiratory Care

2010 OPEN FORUM Abstracts

BENCH STUDY OF THE SONARMED AIRWAY MONITORING SYSTEM’S ABILTY TO DETECT ARTIFICIAL AIRWAY DISPLACEMENT.

Joel M. Brown, John S. Emberger; Christiana Care Health System, Newark, DE

Background: In order to provide care for ventilator patients the RCP must assure the artificial airway is secure and placed properly. The loss of the artificial airway can lead to multiple complications including death. Today clinicians rely on visual inspection and chest radiography to assure airway placement but both of these methods have limitations. The SonarMed Airway Monitoring System (AMS) is a handheld airway monitoring device that uses an audio waveform echo algorithm (also know acoustic reflectometry) to provide continuous monitoring of endotracheal tube (ETT) displacement. In this bench study we assessed the AMS ability to detect ET displacement using a simulated human airway. Methods: The SonarMed AMS(SonarMed Inc, Indianapolis IN) was calibrated and connected to 3 different ETTs (8.0, 7.0, and 6.5) using the proper airway adapter. Each ETT was marked in 0.5cm increments. The ETTs were placed inside a polyvinyl chloride simulated airway and marked with a baseline insertion point. The ETT was then advanced into the simulated airway in 0.5cm increments up to 3.0cm total. After advancing the ETT 3cm, the ET was removed from the simulated airway and then replaced to the baseline point. The measurement displayed on the AMS monitor at each movement point was documented as well the measurement after removing and replacing the ETT. The AMS was recalibrated after each trial. Results: The Airway Monitoring System was able to detect the migration of the 8.0 ETT within 0.17cm at each point. It detected the 7.0 ET migrations within 0.3cm at each point. The migration detection of the 6.5 ETT was within 0.4cm at each movement point. The Airway Monitoring System detected baseline replacement of the ETT in the airway within 0.13cm. See table for more information. Conclusion: The AMS was able to accurately detect movement of the ETT in the simulated airway. The distance displayed on the monitor was within 0.4cm of the actual movement in all 3 ETT observed in this study. The monitor accurately alarmed in all 9 trials when the airway was withdrawn from the simulated airway. The SonarMed AMS is a promising device that could assist RCPs in the daily management ventilator dependant patients. Sponsored Research - None AMS Endotracheal Tube Displacemet Data