Roughly 20% of the microbes present in skin reside deep in the dermis layer and may be drawn into blood samples. Without a way to avoid these microbes, hospitals have accepted high rates of seemingly unavoidable false positives—until now. Standing guard between the venipuncture site and the culture bottle, the Kurin Lock diverts the initial blood flow that may contain microbes from deep within the skin. A clinically-relevant blood sample then bypasses the contaminants locked within the device.