C8 MediSensors Closes $19 million Preferred Stock Financing PR Newswire SAN JOSE, California, June 12, 2012 - Plans to Introduce Optical Glucose Monitor in Europe in 2012 SAN JOSE, California, June 12, 2012 /PRNewswire/ -- C8 MediSensors, Inc. (www.c8medisensors.