Concentric Medical Announces First Patients Treated With Trevo(TM) System in Acute Ischemic Stroke

MOUNTAIN VIEW, California, January 12 - Concentric Medical, Inc., the global leader in acute ischemic stroke
intervention, today announced that the first cases have been performed using
its Trevo(TM) System in Europe. The Trevo System is an innovative, high
performing, easy-to-use thrombus retrieval system. The main component of the
Trevo System is a stentriever(TM), a new generation of retrieval devices
which removes clots that cause stroke.

A number of renowned interventionalists have used the Trevo System for
their patients in the last few weeks at leading European stroke centers.
Professor Tommy Andersson MD PhD, Head of Neurointervention at Karolinska
University Hospital, Stockholm, Sweden, completed one of the first cases and
said, "The new Trevo System was remarkably effective. The Trevo was also very
easy to use - this is key in being able to rapidly restore blood flow for
patients suffering an acute ischemic stroke. I believe the Trevo System may
represent a great advance in the treatment of this potentially devastating
condition."

Concentric Medical is the pioneer in developing devices for ischemic
stroke intervention. Since 2004, Concentric Medical's devices have been used
in thousands of stroke patients worldwide. This experience has been
incorporated into the design of the Trevo System to make thrombus removal an
easier, faster and more predictable procedure.

Maria Sainz, President and CEO of Concentric Medical, said, "The Trevo
System represents a very exciting opportunity for Concentric, one that has
the potential to greatly expand the treatment of stroke. As a leader in
stroke intervention, we are committed to bringing innovative tools to
clinicians. We are also committed to offering the broadest range of
interventional devices and systems to treat patients effectively."

Concentric Medical currently markets the Merci Retriever(R), which is the
market leading solution for ischemic stroke intervention. In addition,
Concentric's DAC(TM) catheters are often used in the setting of ischemic
stroke and other neurointerventional procedures. Together, the Trevo System,
the Merci Retriever and the DAC family of catheters represent an unparalleled
array of choices for physicians involved in the treatment of ischemic stroke.

About Concentric Medical

Concentric Medical is located in Mountain View, California and is the
global leader in the endovascular treatment of acute ischemic stroke. The
company manufactures and markets solutions for ischemic stroke: minimally
invasive devices that are delivered into the brain to restore blood flow by
removing blood clots that cause ischemic stroke. Concentric Medical's devices
are available in over 500 leading stroke centers around the world, and have
been the subject of several clinical studies. For more information about
Concentric Medical, please visit www.concentric-medical.com.

About Acute Ischemic Stroke

Stroke is the third leading cause of death in the developed world and the
leading cause of serious long-term disability. Ischemic stroke represents
over 85% of strokes and occurs when a blockage or clot develops in one of the
arteries supplying blood to the brain. In 2004 the FDA cleared Concentric
Medical's Merci Retriever for use in patients who are ineligible for IV-tPA
or who fail to respond to IV-tPA therapy. This pioneering device created a
departure from the historic method of caring for stroke patients and offered
physicians and patients a long-awaited option for stroke intervention.

    Media Contact: Mike Dineen, VP of Marketing
    +1-650-938-2100
    strokeinfo@concentric-medical.com

Mike Dineen, VP of Marketing of Concentric Medical, +1-650-938-2100, strokeinfo at concentric-medical.com