Concentric Medical to Sponsor Randomized Trial

Tuesday, September 23, 2008 General News J E 4
MOUNTAIN VIEW, Calif., Sept. 23 Concentric Medical, Inc.,the global leader in devices for clot removal in ischemic stroke patients,today announced its plan to sponsor a prospective randomized clinical trialcomparing intervention using the Merci Retrieval System(TM) with best medicaltherapy.

A steering committee comprised of clinical experts from around the worldhas agreed to support and help guide the trial, named RETRIEVE (Randomizedtrial of Endovascular TReatment of acute Ischemic strokE Versus mEdicalmanagement). The trial, which will enroll in centers throughout the world,will randomize patients between treatment with the Merci Retriever(R) andnon-interventional, best medical therapy. Enrollment is expected to beginin 2009.

"We believe a positive randomized trial will significantly improve patientaccess to interventional technologies, augment the body of evidence, andsupport a collaborative and comprehensive approach by all clinicians involvedin the stroke care chain. Despite a large body of clinical data and over 9,000patients treated with the Merci Retriever thus far, mechanical intervention isstill only used in a very small percentage of stroke cases today," said MariaSainz, CEO of Concentric Medical.

The Merci Retriever is made with a flexible, shaped Nitinol wire thatallows delivery of the Retriever in linear form using standard catheterizationtechniques. A neurointerventionalist makes a small puncture in the groin tointroduce the Merci Retriever into an artery leading to the brain. The MerciRetriever returns to its original shape when deployed in and around the bloodclot in the brain.

About Concentric Medical

Concentric Medical is located in Mountain View, California, and wasfounded in August 1999. The company manufactures and markets the MerciRetrieval System, which is a minimally invasive device that is delivered by aneurointerventionalist into the brain to restore blood flow by engaging,capturing and removing blood clots that cause ischemic stroke. The MerciRetrieval System is available in over 250 leading stroke centers around theworld, and has been the subject of two successful clinical trials, MERCI andMulti MERCI. Concentric Medical estimates that over 9,000 patients have beentreated with its devices. For more information about Concentric Medical,please visit

Media Contact: Andrew Gordon

1 650-810-1701

SOURCE Concentric Medical, Inc.


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