PLC Systems Inc. (PLC) is a medical device company specializing in technologies for the cardiac and vascular markets. The Company manufactures the carbon dioxide (CO2) Heart Laser System that cardiac surgeons use to perform CO2 transmyocardial revascularization, or TMR, to alleviate symptoms of severe angina. It also manufactures CO2 surgical laser tubes and provides contract assembly services on general purpose CO2 lasers. The RenalGuard is a product of the Company, which is designed to reduce the toxic effects that contrast media can have on the kidneys when it is administered to patients during certain medical imaging procedures. It is believed that allowing contrast media to dwell in the kidneys can lead to contrast-induced nephropathy (CIN), a potentially deadly form of acute kidney injury. By inducing and maintaining a high urine flow rate before, during and after these medical imaging procedures.