STRYKER Signs Definitive Agreement to Acquire CONCENTRIC MEDIC…

MOUNTAIN VIEW, Calif., Sept. 1, 2011 /PRNewswire-AsiaNet/ –

Concentric Medical, Inc., a global leader in acute ischemic stroke
intervention, today announced that Stryker Corporation (NYSE: SYK) has signed a
definitive agreement to acquire Concentric Medical for $135 million in an
all-cash transaction. The acquisition, pending customary regulatory
approvals, is expected to close early in the fourth quarter of 2011.

The acquisition of Concentric Medical provides Stryker with immediate
entry into the fastest growing and most innovative segment of the
interventional neurovascular space. Ischemic stroke represents the vast
majority of all strokes, and this strategic acquisition offers Stryker
immediate access into the rapidly expanding Acute Ischemic Stroke segment with
a proven technology leader.

Concentric Medical manufactures and markets minimally invasive devices that
are endovascularly delivered to the brain to remove blood clots that cause
ischemic stroke. Concentric was a pioneer in the development of acute ischemic
stroke treatments with the launch of the first Merci(R) Retriever in 2004. Most
recently, the company successfully launched the Trevo(TM) Retriever in Europe
in 2010. The Trevo Retriever is the first device utilizing Stentriever(TM)
technology, a novel approach to retrieving clots from the neurovasculature. The
Trevo Retriever is currently being evaluated in the TREVO 2 Trial, a pivotal
clinical trial investigating the safety and efficacy of the Trevo Retriever.

"We believe Stryker is the ideal strategic partner for Concentric and
combining Concentric with Stryker’s Neurovascular division will provide
opportunities to accelerate the development of technology and clinical
evidence and will allow the commercial expansion of Concentric’s ischemic
stroke therapy globally. Our team is excited to be joining the Stryker
organization," said Maria Sainz, President and CEO of Concentric Medical.

J.P. Morgan Securities LLC acted as exclusive financial advisor to
Concentric Medical on the transaction.

About Concentric Medical

Concentric Medical is located in Mountain View, California and is a
global leader in the development of endovascular devices for revascularizing
stroke patients. 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

http://www.concentric-medical.com.

About Acute Ischemic Stroke

Stroke is a leading cause of death and serious long-term disability in
the developed world. 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. CE mark for the Merci Retriever was first obtained in
2002. In 2004, the FDA cleared Concentric Medical’s Merci Retriever(R) for
use in patients who are ineligible for IV-tPA or who fail to respond to
IV-tPA therapy.

SOURCE: Concentric Medical

CONTACT: +1-650-938-2100
strokeinfo@concentric-medical.com