Device and method for fragmenting and removing concretions from body ducts and cavities
First Claim
1. A medical device for breaking a concretion in a body into smaller pieces and removing the pieces from the body, comprising:
- a dilator sheath adapted to penetrate into a passage of the body to reach the location where the concretion to be shattered into smaller pieces is located;
a lithotripsy probe configured for shattering the concretion into smaller pieces;
a tubular member mounted within the dilator sheath and having a tubular member proximal end, a tubular member distal end and an axially extending inner lumen provided within the tubular member to permit the lithotripsy probe to be inserted into the tubular member from the proximal end; and
a retrieval basket coupled to said tubular member at the tubular member distal end, and configured for entrapping and retaining the concretion and the smaller pieces for their extraction from the body, said retrieval basket comprising a structure having a basket proximal portion and a basket distal portion, and constituted by a plurality of filaments extending from a basket proximal end towards the basket distal portion, and then returning to the proximal end after forming a plurality of filament loops in the basket distal portion, and a plurality of filament strands at the basket proximal portion;
wherein said filament loops are overlapped and/or interlaced to provide a connection with each other so as to form a net defining a distal opening at the basket distal end and a plurality of side openings along the structure of the basket;
said distal opening in the basket has such dimension so that to permit the lithotripsy probe to be protruded through said distal opening.
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Accused Products
Abstract
A medical device and method for breaking a concretion in a body into smaller pieces and removing the pieces from the body are described. The device has a dilator sheath, a lithotripsy probe, a tubular member, and a retrieval basket. The dilator sheath adapted to penetrate into a passage of the body to reach the location where the concretion is located. The lithotripsy probe is configured for shattering the concretion into smaller pieces. The tubular member is mounted within the dilator sheath adapted to permit the lithotripsy probe to be inserted into the tubular member. The retrieval basket is coupled to the tubular member, and configured for entrapping the concretion and the smaller pieces for their extraction from the body. The retrieval basket has a structure constituted by a plurality of filaments extending from a basket proximal end towards a basket distal end, and then returning to the proximal end after forming a plurality of filament loops in the basket distal portion, and a plurality of filament strands at the basket proximal portion.
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Citations
21 Claims
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1. A medical device for breaking a concretion in a body into smaller pieces and removing the pieces from the body, comprising:
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a dilator sheath adapted to penetrate into a passage of the body to reach the location where the concretion to be shattered into smaller pieces is located; a lithotripsy probe configured for shattering the concretion into smaller pieces; a tubular member mounted within the dilator sheath and having a tubular member proximal end, a tubular member distal end and an axially extending inner lumen provided within the tubular member to permit the lithotripsy probe to be inserted into the tubular member from the proximal end; and a retrieval basket coupled to said tubular member at the tubular member distal end, and configured for entrapping and retaining the concretion and the smaller pieces for their extraction from the body, said retrieval basket comprising a structure having a basket proximal portion and a basket distal portion, and constituted by a plurality of filaments extending from a basket proximal end towards the basket distal portion, and then returning to the proximal end after forming a plurality of filament loops in the basket distal portion, and a plurality of filament strands at the basket proximal portion;
wherein said filament loops are overlapped and/or interlaced to provide a connection with each other so as to form a net defining a distal opening at the basket distal end and a plurality of side openings along the structure of the basket;
said distal opening in the basket has such dimension so that to permit the lithotripsy probe to be protruded through said distal opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for breaking a concretion in a body into smaller pieces and removing the pieces from the body by using a medical device comprising:
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a dilator sheath adapted to penetrate into a passage of the body to reach the location where the concretion to be shattered into smaller pieces is located; a lithotripsy probe configured for shattering the concretion into smaller pieces; a tubular member mounted within the dilator sheath and having a proximal member end, a distal member end and an axially extending inner lumen provided within the tubular member to permit the lithotripsy probe to be inserted into the tubular member from the proximal end; and a retrieval basket coupled to said tubular member at the tubular member distal end, and configured for entrapping and retaining the concretion and the smaller pieces for their extraction from the body, said retrieval basket comprising a structure having a basket proximal portion and a basket distal portion, and constituted by a plurality of filaments extending from a basket proximal end towards a basket distal end, and then returning to the proximal end after forming a plurality of filament loops in the basket distal portion, and a plurality of filament strands at the basket proximal portion; wherein sides of the filament loops are connected to the sides of adjacent loops at the distal portion of the basket to form a net defining a distal opening at the basket distal end and a plurality of side openings along the structure of the basket; the method comprising; (a) inserting said medical device in a basket closed position through an endoscope into said body into proximity with the concretion; (b) manipulating said lithotripsy probe for protruding thereof from the lumen in the tubular member and the distal opening of the basket to bring said lithotripsy probe into proximity with the concretion entrapped in the retrieval basket; (c) energizing said lithotripsy probe to cause the concretion to break into smaller pieces; (d) manipulating the tubular member and the dilator sheath for opening the retrieval basket, entrapping at least one smaller piece of the concretion in the retrieval basket, and closing the basket around the piece; and (e) removing the medical device from the body together with said at least one piece of the concretion immobilized within the basket.
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Specification