Concentric Medical Announces CE Mark of Aspiration Indication for the DAC(TM) Family of Neurovascular Catheters

MOUNTAIN VIEW, California, June 2, 2010 - Concentric Medical, Inc., the global leader in devices for clot removal
in ischemic stroke patients, today announced an important expanded indication
for the full line of DAC(TM) Neurovascular Catheters. CE Mark was granted
allowing the DAC family of distal access catheters to be used for the
removal/aspiration of fresh, soft emboli and thrombi from vessels in the
arterial system, including the neurovasculature.

Now, the full range of DAC catheters may be utilized for aspirating and
removing thrombus from the neurovasculature. The DAC catheters continue to be
first-in-class for providing distal access and support in tortuous anatomy
commonly encountered in stroke and other neurovascular procedures. The DAC
family of catheters offers the broadest range of diameters and lengths,
providing physicians more options and the ability to tailor their use of the
device.

"I utilize the DAC in most of my interventional ischemic stroke
procedures," said Thomas Liebig, MD, Interventional Neuroradiologist at the
Klinikum Rechts der Isar Technische Universitat Munchen, Germany. "It is an
effective complement in not only gaining access and support for many devices,
but also allows me to aspirate closer to the clot, to enhance clot retrieval
for many patients."

The original DAC catheter was launched in mid 2008 as a distal access,
support and delivery device for use in Merci Retriever procedures. The
original product quickly gained favor in both Merci procedures and general
neurovascular procedures. The DAC catheter family was extended to include 7
different diameters and lengths in 2009. Also in 2009, the DAC family
received FDA clearance for aspirating fresh, soft emboli and thrombi from
vessels in the arterial system.

Maria Sainz, President and CEO of Concentric Medical, said, "The CE mark
for this aspiration indication, is an important milestone as it further
positions Concentric Medical as the company with the broadest acute ischemic
stroke device options for physicians and patients."

About Concentric Medical

Concentric Medical is located in Mountain View, California, and was
founded in August 1999. The company manufactures and markets the Merci
Retrieval System(R), a minimally invasive device delivered by a
neurointerventionalist into the brain to restore blood flow by removing blood
clots that cause ischemic stroke. The Merci Retrieval System is available in
over 500 leading stroke centers around the world, and has been the subject of
two successful clinical trials, MERCI and Multi MERCI. Concentric Medical
estimates that well over 10,000 patients have been treated with its devices.

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(R) for use in stroke 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.

For more information about Concentric Medical, please visit
www.concentric-medical.com.

    Media Contact:
    Concentric Medical, Inc.
    +1-650-938-2100
    strokeinfo@concentric-medical.com

Concentric Medical, Inc., +1-650-938-2100, strokeinfo at concentric-medical.com