Minimally-invasive medical retrieval device
First Claim
1. An elongated medical retrieval device comprising:
- an elongated cylindrical member having a proximal end, a distal end, a proximal portion and a distal portion, the elongated cylindrical member comprising a first continuum of a first metallic material extending therealong;
the proximal portion of the elongated cylindrical member including a proximal closed cylinder, the proximal closed cylinder comprising the continuum of first metallic material and having a circumferential wall of substantially uniform thickness;
the distal portion forming a plurality of resilient grasping members, the resilient grasping members manipulable between a compact shape and an enlarged shape, wherein resilient grasping members of the enlarged shape are in a relaxed condition, and wherein the edges of adjacent resilient grasping members are spaced apart when in the compact condition, and wherein the resilient grasping members, each having a distal end and a proximal end are conjoined about the distal ends thereof; and
an external cylinder of a second continuum of material to constrain the distal portion of the elongated cylindrical member in to the compact shape, the external cylinder being longitudinally slidable about the elongated cylindrical member to alternately deploy the resilient grasping members to the enlarged shape, or recompress the resilient grasping members having the enlarged shape into one of the compact shape or a substantially closed position for capture or capture and retrieval of an object from within a patient.
1 Assignment
0 Petitions
Accused Products
Abstract
A medical retrieval device 10 is disclosed comprising an elongated cylindrical member 11 that includes a continuum of a material 40, preferably a metal such as stainless steel or nitinol, that forms both the resilient grasping members 13 of retrieval basket 54, snare 26, or grasper forceps 23, and the proximal portion 21 or shaft of the device. The elongated cylindrical member can include a metal cannula 60 or solid rod 62 into which a series of laterally adjacent longitudinal slots 15 are cut or formed in the distal portion 37 of the elongated cylindrical member to form a plurality of resilient grasping members. These slots may be cut in a spiral configuration to produce a helical basket 69. The resilient grasping members in the original compact shape 17 are formed into an enlarged shape 18 to create a workspace volume 28 for the capture, manipulation and/or retrieval of an object within a patient. An external constraining device 14, such as an outer sheath, is used for introducing of the device and to compress the resilient grasping members over a calculus 24 or other object into a substantially closed position 30. An internal actuating member 29 within the passage 12 of the elongated cylindrical member can provide an alternative method of opening and closing the retrieval device. Using a small thin-walled cannula, retrieval devices of the present invention can fit through the accessory channel 46 of a small endoscope, such as an ureteroscope 44 while still having a sufficient lumen size to accommodate an ancillary treatment device 25 such as a standard 200 micron laser fiber or lithotripsy wire. The present invention also includes a retrieval device made from a plastic tube 32 having encased reinforcement wires 31. By removing all material 66 except the reinforcement wires from the distal portion of the elongated cylindrical member, the exposed wires can become the resilient grasping members of a basket or forceps.
284 Citations
18 Claims
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1. An elongated medical retrieval device comprising:
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an elongated cylindrical member having a proximal end, a distal end, a proximal portion and a distal portion, the elongated cylindrical member comprising a first continuum of a first metallic material extending therealong;
the proximal portion of the elongated cylindrical member including a proximal closed cylinder, the proximal closed cylinder comprising the continuum of first metallic material and having a circumferential wall of substantially uniform thickness;
the distal portion forming a plurality of resilient grasping members, the resilient grasping members manipulable between a compact shape and an enlarged shape, wherein resilient grasping members of the enlarged shape are in a relaxed condition, and wherein the edges of adjacent resilient grasping members are spaced apart when in the compact condition, and wherein the resilient grasping members, each having a distal end and a proximal end are conjoined about the distal ends thereof; and
an external cylinder of a second continuum of material to constrain the distal portion of the elongated cylindrical member in to the compact shape, the external cylinder being longitudinally slidable about the elongated cylindrical member to alternately deploy the resilient grasping members to the enlarged shape, or recompress the resilient grasping members having the enlarged shape into one of the compact shape or a substantially closed position for capture or capture and retrieval of an object from within a patient. - View Dependent Claims (2, 3)
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4. A medical retrieval device comprising:
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an elongated cylindrical member having a proximal end, a distal end, a proximal portion and a distal portion, the elongated cylindrical member including a proximal closed cylinder, the closed cylinder comprising a continuum of a first metallic material extending therealong and having a circumferential wall of substantially uniform thickness;
the distal portion forming a plurality of resilient grasping members formed from the continuum of fist metallic material, the resilient grasping members manipulable between a compact shape and an enlarged shape, wherein the resilient grasping members of the enlarged shape are in a relaxed condition, wherein edges of adjacent resilient grasping members are spaced apart when in the compact condition, wherein the resilient grasping members include space therebetween configured for insertion of an object therethrough, and wherein the resilient grasping members, each having a distal end and a proximal end are conjoined about the distal ends thereof. - View Dependent Claims (5, 6, 7)
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8. A medical retrieval device comprising:
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an elongated cylindrical member having a proximal end, a distal end, a proximal portion and a distal portion, the elongated cylindrical member comprising a single continuum of a metallic material extending therealong;
the proximal portion of the elongated cylindrical member including a proximal closed cylinder, the proximal closed cylinder comprising the continuum of metallic material and having a circumferential wall of substantially uniform thickness; and
the distal portion forming a plurality of resilient grasping members, the resilient grasping members comprising the continuum of metallic material and manipulable between a compact shape and an enlarged shape, wherein edges of adjacent resilient grasping members are spaced apart when in the compact shape, and wherein the resilient grasping members, each having a distal end and a proximal end, are conjoined about the distal ends thereof. - View Dependent Claims (9)
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10. A medical retrieval device comprising:
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an elongated cylindrical member having a proximal end, a distal end, a proximal portion and a distal portion, the elongated cylindrical member containing a passage therein and including at least one continuum of a first metallic material extending therealong;
the proximal portion of the elongated cylindrical member including a proximal closed cylinder, the proximal closed cylinder comprising the continuum of first metallic material and having a circumferential wall of substantially uniform thickness;
the distal portion including a plurality of resilient grasping members, the resilient grasping members comprising the continuum of first metallic material and manipulable between a compact shape and an enlarged shape, wherein edges of adjacent resilient grasping members are spaced apart when in the compact shape, and wherein the resilient grasping members, each having a distal end and a proximal end, are conjoined about the distal ends thereof; and
an external constraining mechanism to constrain the distal portion of the elongated cylindrical member into the compact shape, the external constraining mechanism being longitudinally slidable about the elongated cylindrical member to alternately deploy the resilient grasping members to the enlarged shape, or recompress the resilient grasping members having the enlarged shape into one of the compact shape or a substantially closed position for capture or capture and retrieval of an object from within a patient.
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11. A medical retrieval device comprising:
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an elongated cylindrical member having a proximal end, a distal end, a proximal portion and a distal portion, the elongated cylindrical member including a proximal closed cylinder, the proximal closed cylinder comprising a single continuum of a metallic material extending therealong and further containing a passage therein;
the proximal portion of the elongated cylindrical member including the proximal closed cylinder, the proximal closed cylinder comprising the continuum of metallic material and having a circumferential wall of substantially uniform thickness;
the distal portion including at least three resilient grasping members formed from the continuum of metallic material, the resilient grasping members forming a retrieval basket, wherein the proximal end of each resilient grasping member is circumferentially offset from the distal end thereof such that the medical retrieval device is a helical basket, the retrieval basket manipulable between a compact shape and an enlarged shape, wherein the resilient grasping members of the enlarged shape are in a relaxed condition, wherein edges of adjacent resilient grasping members are spaced apart when in the compact condition, wherein the resilient grasping members include space therebetween configured for insertion of an object therethrough, wherein the resilient grasping members are configured to create a workspace volume for engaging an object therein, and wherein the resilient members each having a distal end and a proximal end, are conjoined about the distal ends thereof; and
an external constraining mechanism to constrain the distal portion of the elongated cylindrical member into the compact shape, the external constraining mechanism being longitudinally slidable about the elongated cylindrical member to alternately deploy the resilient grasping members to the enlarged shape, or recompress the resilient grasping members having the enlarged shape into one of the compact shape or a substantially closed position for capture or capture and retrieval of an object from within a patient.
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12. A medical retrieval device, comprising:
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a continuum of a metallic material comprising a first cylindrical member at a proximal end and a second cylindrical member at a distal end of the continuum, said cylindrical members separated by a plurality of resilient grasping members, wherein the cylindrical members have a circumferential wall of substantially uniform thickness, the resilient grasping members are manipulable between a compact shape and an enlarged shape, and wherein the resilient grasping members of the enlarged shape are in a relaxed condition and wherein edges of adjacent resilient grasping members are spaced apart when in the compact shape. - View Dependent Claims (13, 14, 15, 16, 17, 18)
providing the device of claim 12;
manipulating the resilient grasping members to an enlarged shape for capturing the object; and
manipulating the resilient grasping members to a compact shape for grasping the object.
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Specification