Medical retrieval basket
First Claim
1. A medical retrieval basket comprising:
- a first elongated member having a proximal end, a distal end, and a hollow passageway longitudinally positioned therebetween;
a first superelastic metallic alloy wire having first and second ends attached to said distal end of said first elongated member and forming a first loop extending longitudinally and distally from said distal end of said member; and
a second superelastic metallic alloy wire having first and second ends attached to said distal end of said member, forming a second loop extending longitudinally and distally from said distal end of said member, and interconnected distally to said first loop.
1 Assignment
0 Petitions
Accused Products
Abstract
A stone retrieval basket having superelastic metallic alloy wires attached to the distal end of an inner elongaged member tube for retrieving calculi and crushing them against an outer introducer tube percutaneously inserted into a patient. The basket comprises kink-resistant superelastic metallic alloy wires such as nitinol forming a bulbous shape for capturing calculi therein. The ends of the superelastic wires of the basket are attached to the distal end of a inner elongated member tube with the aid of sleeves crimped thereon, which are soldered or spot welded in recesses about the distal end of the inner tube. The outer tube is percutaneously inserted into the biliary or urinary system in which the basket is then inserted to capture large-sized stones. A peel-away sheath is also included to introduce the basket and inner elongatged member tube into the outer introducer tube. A dilator member, which is extendable through the passageway of the inner tube, removes any residual debris from the tube that may be left during the stone removal procedure.
286 Citations
21 Claims
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1. A medical retrieval basket comprising:
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a first elongated member having a proximal end, a distal end, and a hollow passageway longitudinally positioned therebetween; a first superelastic metallic alloy wire having first and second ends attached to said distal end of said first elongated member and forming a first loop extending longitudinally and distally from said distal end of said member; and a second superelastic metallic alloy wire having first and second ends attached to said distal end of said member, forming a second loop extending longitudinally and distally from said distal end of said member, and interconnected distally to said first loop. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13)
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11. The basket of claim further comprising a second elongated member having a bullet shaped distal end and removably inserted in said passageway.
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14. A medical retrieval basket comprising:
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a first tube having a first proximal end, a first distal end, and a first passageway longitudinally positioned therebetween; a second tube having a second proximal end, a second distal end, and a second passageway longitudinally positioned therebetween and removably inserted in said first passageway; a first superelastic metallic alloy wire having first and second ends attached to said second distal tube end and forming a first loop extending longitudinally and distally from said second distal tube end; a second superelastic metallic alloy wire having first and second ends attached to said second distal tube end and forming a second loop extending longitudinally and distally from said second distal tube end; a third superelastic metallic alloy wire having first and second ends attached to said second distal tube end and forming a third loop extending longitudinally and distally from said second distal tube end; and a fastener interconnecting distally said first, second, and third loops. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A medical retrieval basket comprising:
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a first metal tube having a first proximal end, a first distal end, and a first hollow passageway longitudinally positioned therebetween; a second metal tube having a second proximal end, a second distal end, and a second hollow passageway longitudinally positioned therebetween and removably inserted in said first tube passageway, said second distal tube end having first, second, and third pairs of oppositely facing recesses formed in an outer surface thereof and equally spaced from one another; first, second, and third nitinol wires each having a superelastic state and a pair of ends attached to one of said pairs of oppositely facing recesses, each of said ends having a metal sleeve crimped thereto, each of said sleeves being attached to said second distal tube end in an individual one of said recesses, said first, second, and third wires forming respective first, second, and third loops extending longitudinally and distally from said second distal tube end and having a width and a length approximately twice as along as said width; suture and a urethane coating fixedly interconnecting said first, second and third loops at a farmost distal position thereof, said first tube passageway being sized for retracting said wires therethrough; a peel-away sheath having a hollow passageway with said first, second, and third loops positioning therein in a collapsed state; and an elongated member having an elliptically shaped distal end and removably inserted in said second tube passageway.
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Specification