Surgical retrieval baskets
First Claim
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1. A surgical extractor for removing an object from a body, said extractor comprising:
- A) a sheath,B) a plurality of rectangular cross-section wires normally encased in a compact form within said sheath whereupon relative displacement of said sheath and the wires frees a portion of the wires and enables the wires to form a basket for retrieving an object, each of said wires including a stress-relieved, cold formed section of predetermined shape, andC) means for forming the wires together in a predetermined angular relationship that defines an enlarged portion of said basket between said sections.
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Abstract
A retrieval basket comprises a plurality of wires normally encased in a compact form within a sheath whereupon displacement of the sheath to free a portion of the wires enables the wires to form an enlarged retrieval basket. The wires forming the retrieval basket are cold formed in a predetermined shape and are secured together in a predetermined fashion to define the retrieval basket.
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Citations
24 Claims
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1. A surgical extractor for removing an object from a body, said extractor comprising:
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A) a sheath, B) a plurality of rectangular cross-section wires normally encased in a compact form within said sheath whereupon relative displacement of said sheath and the wires frees a portion of the wires and enables the wires to form a basket for retrieving an object, each of said wires including a stress-relieved, cold formed section of predetermined shape, and C) means for forming the wires together in a predetermined angular relationship that defines an enlarged portion of said basket between said sections. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A surgical extractor for removing an object from a body comprising:
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A) handle means extending along an axis at a proximal portion of said extractor for operating said extractor, said handle means having base means for being grasped by a physician and slider means for reciprocating along the axis with respect to said base means, B) retrieval basket means connected to said base means for forming a basket distally of said handle means, said retrieval basket comprising a plurality of individual rectangular cross-section wires of a shape memory material having first and second ends and a central, cold-formed section of a predetermined shape and means for fixing the individual wires in predetermined angular relationships to define an enlarged basket, C) sheath means connected to said slider means and axially displaceable between first and second positions with respect to said retrieval basket means whereby said sheath means retains said wires in a compact form within said sheath means in a first position and exposes said wires in the second position thereby to enable said wires to expand to said basket. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An extractor for removing an object from a body comprising:
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A) retrieval basket means comprising; (i) an odd number of individual flat, shape memory wires having first and second ends and an intermediate section preformed in a shape corresponding to the desired shape of the basket and characterized by having essentially no internal stresses in the preformed shape, and (ii) means for fixing said first and second ends of said wires to establish an angular spacing between each of said wires whereby the intermediate sections of the wires lie in angularly spaced radial planes, B) positioning means having proximal and distal ends, said distal end being attached to the fixing means at the first ends of said wires for positioning said retrieval basket means in the body, and C) a sheath carried by said positioning means, said sheath, in a first position, overlying said wires thereby to compact the wires and, in a second position, freeing said wires to expand into the shape of the retrieval basket. - View Dependent Claims (23, 24)
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Specification