Patent ID: 7101380

Claim:
A retrieval basket for entrapping and retaining an object located in a body for its extraction therefrom, the basket comprising a structure composed of a proximal portion and a distal portion, the proximal portion extending from a proximal end of the basket, and the distal portion extending from a distal end of the basket, and the proximal and distal portions being joined together at a location between the proximal and distal ends, said basket being constituted by a plurality of filaments extending from the proximal end towards the distal end and being in the form of loops, wherein at least a part of the loops are interlaced so as to define a net at least in the distal portion, said net presenting a plurality of holes dimensioned to cause said net to retain objects entrapped in said basket for extraction from the body, said filaments are made of a material that imparts structural rigidity and dilatation abilities to the basket when opened, and said filaments have portions that are bound together to define a plurality of branches over the proximal portion for coupling to a pushing element at said proximal end; wherein at least a part of the filaments, which originate from the proximal end, also arrive at the proximal end after interlacing, wherein the net is formed of holes having a size decreasing from the proximal end towards the distal end.