Modified design builds upon successful international studies

MILFORD, Mass., PLC Systems Inc., a company focused on innovative medical device technologies, announced today that it has received final approval from the U.S. Food and Drug Administration (FDA) to commence  its U.S. pivotal trial to study the efficacy of the Company's RenalGuard Therapy® and RenalGuard System™ in the prevention of Contrast-Induced Nephropathy (CIN).

Mark R. Tauscher, President and Chief Executive Officer of PLC, said, "We've very pleased to be able to move forward with our U.S. pivotal trial, starting with many of the hospitals that had participated in our earlier trial.  Using lessons learned from the clinical trials of RenalGuard in Europe as well as other clinical developments since 2008, we made slight modifications to our original trial protocol that we believe will make it more scientifically significant. We are now finalizing our submissions to the hospital Institutional Review Boards and will begin enrolling patients in the near future. This is the first step on our path forward to seeking FDA approval to market the RenalGuard therapy and system in the U.S."

PLC's U.S. pivotal study is under the supervision of Principal Investigators Charles Davidson, MD, Professor of Medicine, Northwestern University Medical School, Richard J. Solomon, MD, Professor of Medicine, University of Vermont College of Medicine and Roxana Mehran, MD, Professor of Medicine at Mount Sinai School of Medicine. It is designed as an adaptive, randomized controlled trial at up to 30 sites in the U.S. Enrollment in the trial will include at least 326 patients and potentially up to 652 patients, depending upon the outcome of a sample size re-estimation after 163 patients. The sample size re-estimation, often used in adaptive trials, enables investigators to ensure that the trial is sufficiently powered so that the final results are statistically meaningful.

PLC's U.S. study builds upon two clinical trials by independent clinical investigators in Europe, both of which showed significant reductions in incident rates of CIN in at-risk patients through the use of RenalGuard compared to the current standard of care.