Concentric Medical

Concentric Medical was founded in 1999 with a focus on cerebral stroke. Concentric markets the Merci Retriever, cleared by the FDA in August 2004 for the removal of blood clots from patients experiencing an ischemic stroke.


The Merci Retriever received European CE Mark approval in early 2004 and is currently marketed in Europe, U.S., and international markets together with the Merci Micro-catheter and the Merci Balloon Guide Catheter. through distributors.

In February 2007 Concentric received FDA approval for the Merci L5 retrieval device, a second generation improvement over original product, for thrombus retrieval in ischemic strokes.

The device cleared European CE Mark in July 2006 and was launched in Europe the same year. The product was launched also launched in U.S. in 1st quarter 2007.

According to the company by the end of 2008 more than 10,000 patients have received treatment with the Merci Retrieval worldwide.