The UPMC Cam Captures a Microbubble in Action (video) University of Pittsburgh Schools of the Health Sciences Share Print E-Mail Loading video... Caption This video highlights the rapid oscillation of an individual microbubble, initially about 3 micrometers in diameter. The oscillation, due to the exposure of this bubble to ultrasound, is occurring at one million times per second. The shear stress generated by the rapid expansions and contractions of this bubble is sufficient to poke holes in nearby cells, allowing for the entry of otherwise impermeable therapeutic compounds. The video recording, afforded by the UPMC-Cam, is captured at approximately 11 million frames per second. The total duration of this recording is 8 microseconds, and the scale bar is 5 micrometers. Credit University of Pittsburgh Usage Restrictions Credit University of Pittsburgh Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.