New Patch Monitors Blood Flow

The patch contains a 12 x 12 grid of ultrasound transducers that can measure blood flow directly below the patch, as deep as 14 cm within the body. Simply stick it to the skin, and read the signals. The transducers can either be controlled to activate all together, or at different times. The former technique lets doctors investigate vessels deeper in the body, while the latter is intended for investigating vessels that aren’t directly below the patch. Tests have shown the device is as accurate as commercial ultrasound devices.