Microcirculation

This study looks at two methods to check blood flow in critically ill patients: the traditional capillary refill time (pressing on skin and timing color return) and the perfusion index (a continuous reading from a finger clip). Researchers want to see if the perfusion index can r…

This study is testing whether shining blue or near-infrared light on the hands can change blood flow in tiny blood vessels. Forty healthy adults will each attend two sessions, one for each light type. Researchers will use special cameras and laser devices to measure blood flow an…