CANNULA WITH ASSOCIATED FILTER AND METHODS OF USE DURING CARDIAC SURGERY

摘要

This invention is devices and methods for filtering blood (10). The devices generally comprise a mesh (40) for filtering blood flowing within a blood vessel, particularly within an artery such as the aorta; a structure (20) adapted to open and close the mesh within the blood vessel; and a means (72) to actuate the structure. The methods generally include the following steps: introducing a mesh (40) into a blood vessel to entrap embolic material; adjusting the mesh (40), if necessary, during the course of filtration; and removing the mesh (40) and the entrapped foreign matter from the blood vessel. Additionally, visualization techniques are used to ensure effective filtration.