Concentric Rolls Out Family of Neurovascular Retrievers

Concentric Medical has launched its “V” series of Merci Retrievers in the U.S. for restoring blood flow in patients who have suffered ischemic strokes.

Using a flexible Nitinol wire that delivers the retriever with standard catheterization techniques, a neurointerventionalist makes a small puncture in the groin to place the retrievers into an artery leading to the brain. When deployed in and around the blood clot in the brain, the retrievers return to their original shape, Concentric said.

The distal end of the retriever is tightly coiled to resist stretching and assists in dislodging clots. The proximal end is more loosely coiled, which facilitates wrapping and holding a dislodged clot.