Medical device with slotted memory metal tube
DC
First Claim
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1. A medical device for use within a tubular structure of a human body, the device comprising:
- at least one monolithic memory metal tube configured and sized to be inserted within the tubular structure of the human body, the metal tube including at least one of a memory effect and superelasticity and having at least one expandable section with a plurality of metal members separated by openings and capable of contraction and expansion to an expanded shape to form a retrieval basket for retrieving particles to be removed from the human body, the metal members being sufficiently rigid to substantially maintain the expanded shape of the expandable section when placed within and in contact with the tubular structure of the human body, the expandable section being free of interior structure that is axially movable within the expandable section to expand and/or contract the expandable section, the metal tube having only a single lumen, the metal tube having a central longitudinal axis and a distal end, the expandable section being configured to catch a solid particle having a maximum cross-sectional dimension greater than a maximum cross-sectional dimension of the distal end of the metal tube transverse to the central longitudinal axis of the metal tube.
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Abstract
A series of medical instruments can be made with the use of shape memory tube with a transformation temperature that is above or below the ambient temperature. In the first case, the material behaves with the shape memory effect and in the second case the behavior is superelastic. The wall of the tube has been provided with a plurality of slots in specific places, often near or at the distal end of the instrument, and in specific arrangements which allow local variations in diameter, shape, and/or length. These variations can either be caused by the memory effect during temperature change or by superelastic behavior during change of the mechanical influences on the memory metal by the surrounding material.
106 Citations
64 Claims
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1. A medical device for use within a tubular structure of a human body, the device comprising:
at least one monolithic memory metal tube configured and sized to be inserted within the tubular structure of the human body, the metal tube including at least one of a memory effect and superelasticity and having at least one expandable section with a plurality of metal members separated by openings and capable of contraction and expansion to an expanded shape to form a retrieval basket for retrieving particles to be removed from the human body, the metal members being sufficiently rigid to substantially maintain the expanded shape of the expandable section when placed within and in contact with the tubular structure of the human body, the expandable section being free of interior structure that is axially movable within the expandable section to expand and/or contract the expandable section, the metal tube having only a single lumen, the metal tube having a central longitudinal axis and a distal end, the expandable section being configured to catch a solid particle having a maximum cross-sectional dimension greater than a maximum cross-sectional dimension of the distal end of the metal tube transverse to the central longitudinal axis of the metal tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A medical device for use within a tubular structure of a human body, the device comprising:
a single-piece memory metal tube configured and sized to be inserted and remain entirely within the tubular structure of the human body, said metal tube having an outer diameter and an interior diameter, said metal tube having a proximal end, a distal end opposite said proximal end, and at least one expandable section with a plurality of metal members separated by openings, said metal members being sufficiently rigid to substantially maintain an expanded shape of the expandable section when placed within and in contact with the tubular structure of the human body, said metal tube having a longitudinal passage coaxial to a central longitudinal axis of said metal tube, said plurality of metal members being moveable from a contracted shape to the expanded shape to form a retrieval basket as a result of at least one of memory effect and superelasticity, said basket configured to capture particles therein and having concave interior surfaces facing said passage, said passage being free of any internal structure axially moveable within said basket to expand and/or contract said metal members, said metal members being configured to catch a solid particle having a maximum cross-sectional dimension greater than a maximum interior diameter at said distal end of said metal tube transverse to the central longitudinal axis of said metal tube. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. A medical device for use within a tubular structure of a human body, the device comprising:
at least one monolithic memory metal tube configured and sized to be inserted within the tubular structure of the human body, the metal tube including at least one of a memory effect and superelasticity and having at least one expandable section with a plurality of metal members separated by openings and capable of contraction and expansion to an expanded shape to form a retrieval basket for retrieving particles to be removed from the human body, the metal members being sufficiently rigid to substantially maintain the expanded shape of the expandable section when placed within and in contact with the tubular structure of the human body, the expandable section being free of interior structure that is axially movable within the expandable section to expand and/or contract the expandable section, the metal tube having a central longitudinal axis and a distal end, at least the distal end of the metal tube being unobstructed, the expandable section being configured to catch a solid particle having a maximum cross-sectional dimension greater than a maximum cross-sectional dimension of the distal end of the metal tube transverse to the central longitudinal axis of the metal tube. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
Specification
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Litigation Data
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Current AssigneeEVM Systems LLC (Acacia Research Corporation)
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Original AssigneeEVM Systems LLC (Acacia Research Corporation)
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InventorsBesselink, Petrus A., Sachdeva, Rohit C. L.
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Primary Examiner(s)Lucchesi; Nicholas
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Assistant Examiner(s)SHUMATE, VICTORIA PEARL
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Application NumberUS11/381,217Publication NumberTime in Patent Office2,016 DaysField of Search604/105, 604/530, 604/531, 606/198, 606/200US Class Current604/531CPC Class CodesA61B 1/00082 BalloonsA61B 1/0058 using shape-memory elementsA61B 1/015 Control of fluid supply or ...A61B 1/018 for receiving instrumentsA61B 1/307 for the urinary organs, e.g...A61B 1/3137 for examination of the inte...A61B 17/122 Clamps or clips , e.g. for ...A61B 17/1285 for minimally invasive surgeryA61B 17/221 Gripping devices in the for...A61B 17/32056 Surgical snare instruments ...A61B 2017/00349 Needle-like instruments hav...A61B 2017/00867 shape memory effect for pro...A61B 2017/00986 Malecots, e.g. slotted tube...A61B 2017/2212 having a closed distal end,...A61B 2017/2215 having an open distal endA61B 2090/061 for measuring dimensions, e...A61B 2090/063 for measuring volumeA61B 5/0084 for introduction into the b...A61B 5/1076 for measuring dimensions in...A61B 5/6853 with a balloonView All
