Importance

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Abstract

A surgical capsule of the present invention is positioned in an artery or vein by threading a catheter containing the capsule from a proximal incision in the blood vessel to a location within the blood vessel adjacent to a lesion. The catheter comprises an outer holding sheath, an intermediate deployment sheath, and an inner guide wire, all of which are reciprocable with respect to each other. The capsule includes (1) a control sub-assembly that includes a hub and a plurality of outwardly biased leaf springs, and (2) a filter sub-assembly that includes a porous dome that is capable of permitting fluid flow, but retaining particles. Domes of different porosity may be affixed to the leaf springs. The position of the capsule is controlled by the guide wire. The present invention allows the interchangeability of mesh caps of different diameters and mesh sizes. By using the same capsule and the same deployment method, tines or hooks on the shrouds hold the elasticized rim on the mesh. This arrangement enables rapid changes of mesh caps in the operating room, as well as a reduced inventory of catheters, in which the varied mesh caps are interchangeable. Selection of particular mesh caps in special situations enables the desirable production laminar blood flow, which is desirable from the standpoint of treatment.

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First Claim