This video presents the findings of a study that shows the Bair Hugger Warming System did not disrupt clean operating room airflow patterns.  By using a megasonic fog generator, researchers John P. Abraham, Ph.D., Professor of Thermal Sciences at the University of St. Thomas, and Jennifer A. Wagner, Ph.D., Prism Environmental Health and Safety Solutions, visualized operating room airflow patterns during a simulated hip replacement surgery both with and without warming from the Bair Hugger system.  The megasonic fog generator emitted visible water vapor, which rode the airflow currents, thereby permitting visualization of the operating room airflow patterns.  The downward flow of clean air – a common operating room feature – worked both with and without heat from the Bair Hugger warming system.  In other words, the airflow patterns in the operating room looked the same both with and without heat from the Bair Hugger warming system.  These findings confirm the results of a separate computational fluid dynamics study performed by Dr. Abraham, which is shown in a separate video.  Both studies rebut claims from a competitor and a group of plaintiff attorneys that the warming system causes or increases the risk of surgical site infections by disrupting clean operating room airflow.  Rather, in both studies, the Bair Hugger Patient Warming System did not disrupt clean operating room airflow and did not move air from the floor to the surgical site.