CardioRenal Systems (formerly known as RenalGuard Solutions) is a medical device company focused on innovative technologies for the cardiac and vascular markets. The company's lead product, RenalGuard®, is designed to remove contrast dyes known to be toxic to the kidneys. Contrast dyes are used in many cardiovascular diagnostic and interventional imaging procedures to facilitate the capture and display of X-ray images. RenalGuard® is a closed loop system designed to minimize the risk of over- or under-hydration while maintaining the high urine flows recommended for the prevention of CIN.