JP2008068102A - Basket with one or more movable legs - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical retrieval device with a new structure to retrieve target materials from a body. <P>SOLUTION: The medical retrieval device 15 includes a basket 10 with three or more legs 28. The device 15 can be used to retrieve materials such as stones from a body. At least one of the legs 28 of the basket 10 is movable independently from at least one of the other legs 28. This independent movability allows materials to be captured more readily and easily. A distal end 8 of the basket 10 can be non-perforated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

(Citation of related application)
This application is based on and claims priority from US Provisional Application No. 60 / 060,821, filed Oct. 1, 1997. U.S. Pat. No. 4,590,938 is hereby incorporated by reference in its entirety.

(Technical field)
The present invention relates generally to a medical retrieval device for retrieving material from within the body. More particularly, the present invention relates to such a device having a basket at its distal end with one or more legs, the legs being operable independently of the other legs, whereby The basket is operated around a substance (eg, some stones) to increase the ability of the basket to capture the substance.

(Background information)
The basket is used to recover biological material from the body. The basket is used, for example, to remove stones from the urinary tract (eg, urinary stones) or stones from the biliary tree (eg, bile duct stones). The basket may or may not be used through a catheter, endoscope, or laparoscope.

  Existing collection baskets are generally composed of legs, and the diameter and overall shape of the basket is defined by the number, flexibility, shape, and length of the legs. These legs are generally equal in length and fixed, giving the basket shape the overall symmetry. The basket legs are typically connected to the tip of the basket and the base of the basket (closest to the sheath). The legs are connected using solder by welding the legs together or by some type of mechanical mechanism. At the base of the basket, these connected legs are also typically attached to a shaft, wire, or coil. The shaft can be moved back and forth within the sheath or catheter by an operating device (eg, a proximal handle with a manual slider that moves back and forth). Alternatively, the sheath can move back and forth, thereby exposing and covering the basket. In either case, the basket is fully exposed and expanded, fully folded within the sheath, or somewhere between these extremes, and these legs are generally all Move in a collaborative style. This is because they are connected at both the tip and base to form the basket.

  The present invention provides a medical retrieval device with a novel structure for retrieving material from within the body.

(Summary of the Invention)
A feature of the present invention is a medical retrieval device having a basket with one or more legs, which are operable and movable independently of the other legs, thereby from within the body. Facilitates capture of material (eg, calculus) and improves retention of the captured material in the basket. For example, one leg of a basket of four legs may be movable independently, or two of the four legs work together independently of the other two legs Or the three legs of the basket of five legs can be moved together independently of the fourth and fifth legs. By tilting, manipulating and / or steering a basket according to the present invention, material capture and release may be achieved. The basket of the present invention also improves the expansion or opening force to expand the path in which the basket is located. In accordance with the present invention, the shape and size of the spacing between at least one pair of basket legs can be adjusted by individual manipulation of one or more legs. That is, when the basket is manipulated to capture a calculus, at least one leg can be actuated independently, thereby adjusting the spacing between the basket legs. Once the calculus is captured, the independently operable leg (s) can again be moved, alone and / or with other legs, to hold the calculus. In one embodiment, the distal end of the basket is not perforated, which can assist in retaining the captured material within the basket.

In one aspect, the present invention relates to a medical retrieval device comprising a proximal handle, a sheath, and a basket. The sheath extends from the handle and has at least one lumen therein. The sheath has a distal end away from the handle and a proximal end closer to the handle. The basket is in a collapsed position within the lumen of the sheath relative to the sheath within the lumen;
And in the extended position, the basket extends from the distal end of the sheath and assumes a three-dimensional shape outside the lumen of the sheath. The basket includes at least three legs and at least one of the legs is movable independently of at least one of the other legs. For example, two of these legs can be moved together independently of the other basket legs, or one leg can be moved independently of all of the other legs.

  Embodiments according to this aspect of the invention may include various features. For example, at least one of the legs can be connected to a first elongate member (which extends into the lumen of the sheath to the handle) and at least one of the other different ones of the legs. One can be connected to a second elongate member (which extends into the lumen of the sheath to the handle) so that independent movement of the first elongate member within the sheath can be coupled to the legs connected thereto. And the independent movement of the second elongate member within the sheath independently moves the legs connected thereto. Also, at least one of these legs may comprise an internal surface that is roughened at least in part of its surface. This basket shape may have its non-perforated distal end.

  In another aspect, the invention includes a device of the type described above, which comprises a handle, a sheath, and a basket. The device also includes first and second elongated members, rings, and stops. The first elongate member is disposed within the lumen of the sheath and is movable there, and one end thereof is attached to the base of the basket. A ring surrounds the first elongate member and is disposed within the lumen of the sheath where it is movable. The second elongate member is movable within the lumen of the sheath, with one end attached to the ring and the other end attached to at least one of its legs. A stop is disposed within the lumen of the sheath to prevent the second elongate member from advancing beyond a predetermined distance within the lumen in contact with the ring, thereby providing a lumen through the first elongate member. Further movement of the sheath towards the distal end of the sheath “opens the mushroom” or otherwise changes its shape.

  In yet another aspect, the present invention relates to a medical retrieval device comprising a proximal handle, a sheath, and a basket, the sheath having a plurality of lumens therein. The sheath has a distal end away from the handle and a proximal end closer to the handle. The basket is movable between a collapsed position and an extended position, the basket comprising at least three legs, each leg disposed within a separate one of the lumens; It is possible to move there. The basket takes a three-dimensional shape when all the legs extend out of the distal end of the sheath. The basket shape has a non-perforated distal end, and at least one of these legs is movable independently of at least one of the other legs.

  Embodiments according to this aspect of the invention may include various features. For example, each of these legs may be connected to an elongated member that extends into the respective lumen to a handle, and at least one of these elongated members is at least one of the other elongated members. It may be movable independently of one, so that independent movement within the sheath of at least one of the elongate members independently moves the legs connected thereto. Also, at least one of these legs may include an interior surface having at least a portion that is roughened to facilitate capture of the item to be collected.

In yet another aspect, the present invention relates to a method for recovering a substance from the body. The method includes inserting a medical retrieval device (such as the apparatus described above) into the body, placing the basket in an extended position, and replacing at least one of the legs with at least one of the other legs. Manipulating the basket by moving it independently of the one to enclose the substance, pulling all the legs back into the lumen and grasping the substance with the legs of the basket, and pulling the device out of the body Removing the grasped material from the body.
More specifically, the present invention may relate to the following items.
(Item 1) A medical retrieval device comprising: a proximal handle; a sheath extending from the handle and including at least one lumen, the sheath having a distal end remote from the handle; and a basket The basket and the sheath are movable relative to each other to achieve a collapsed position of the basket and an extended position of the basket, wherein in the collapsed position, the basket is the tube of the sheath. A basket that resides in a cavity and extends from the distal end of the sheath in the extended position and exits the lumen of the sheath and assumes a three-dimensional shape, the distal of the basket Includes at least three legs connected at the ends, at least one of the legs being movable independently of at least one of the other legs Some, including the basket, device.
(Item 2) The device of item 1, wherein at least one of the legs is connected to a first elongate member extending to the handle within the lumen of the sheath, and at least one of the legs. Two other legs are connected to a second elongate member extending to the handle within the lumen of the sheath so that independent movement of the first elongate member within the sheath An independent movement of the leg connected to one elongated member is generated, and an independent movement of the second elongated member in the sheath is independent of the leg connected to the second elongated member. A device that produces an action.
3. The device of claim 1, wherein at least one of the legs includes an interior surface having at least one rough portion.
4. The device of claim 1, wherein the distal end of the basket is not perforated.
5. A medical retrieval device comprising a proximal handle, a sheath extending from the handle and including at least one lumen, the sheath having a distal end remote from the handle, and a basket The basket and the sheath are movable relative to each other to achieve a collapsed position of the basket and an extended position of the basket, wherein in the collapsed position, the basket is the tube of the sheath. A basket that resides in a cavity and extends from the distal end of the sheath in the extended position and exits the lumen of the sheath to assume a three-dimensional shape, the base, the distal end , And at least three legs connected at the distal end of the basket and disposed within the lumen of the basket and the sheath And a first elongate member movable within the lumen of the sheath and attached at one end to the base of the basket, and disposed within the lumen of the sheath and within the lumen of the sheath A ring surrounding the first elongate member that is movable, and movable within the lumen of the sheath, attached to the ring at one end and attached to at least one of the legs at the other end. Two elongated members and a stop in the lumen of the sheath, wherein the second elongated member contacts the ring to prevent advancement beyond a predetermined distance within the lumen. A further movement of the sheath toward the distal end of the sheath by the first elongate member in the lumen changes the shape of the basket. Including stop, Vice.
6. A medical retrieval device, comprising: a proximal handle; a sheath extending from the handle and including a plurality of lumens, the sheath having a distal end remote from the handle; and a basket. The basket and the sheath are baskets movable relative to each other between a collapsed position and an extended position, and include at least three legs connected at the distal end of the basket. And each leg is disposed in a different lumen of the lumen and is movable in the different lumen, wherein at least one of the legs is movable independently of at least one of the other legs. A basket that has a three-dimensional shape when all the legs extend out of the distal end of the sheath and has a non-perforated distal end. Nest.
7. The device of claim 6, further comprising at least two elongate members, wherein at least one of the legs is different from at least one of the other legs. Each elongated member is disposed in a different lumen and movable within the different lumen, and at least one of the elongated members is movable independently of at least one of the other elongated members. As a result, the device wherein at least one independent movement of the elongate member within the sheath results in an independent movement of the at least one leg coupled to the elongate member.
8. The device of claim 6, wherein at least one of the legs includes an interior surface having at least a portion that is rough.
(Item 9) A method for recovering a substance from a body,
Inserting a medical retrieval device into the body, the device including a basket, a proximal handle, and a sheath extending from the handle and including at least one lumen, wherein the sheath is A distal end remote from the handle, wherein the basket and the sheath are movable relative to each other to achieve a collapsed position of the basket and an extended position of the basket; In position, the basket resides in the lumen of the sheath, and in the extended position of the basket, the basket extends from the lumen of the sheath and exits the lumen of the sheath in three dimensions. Constructed, the basket includes at least three legs connected at the distal end of the basket, the legs At least one is movable independently of at least one of the other legs, placing the basket in the extended position, and at least one of the legs for the other leg. Manipulating the basket to enclose the substance by moving it independently of at least one of the legs and using the legs of the basket to grip the substance in the lumen to grasp the substance. Pulling back all of the parts and withdrawing the device from the body to remove the grasped material from the body.
(Item 10) A medical retrieval device, a sheath defining a proximal handle and only one lumen, having a distal end extending from the handle and remote from the handle; basket The basket and the sheath are baskets movable relative to each other to collapse and unfold the basket, the basket including at least three legs connected at a distal end of the basket A device comprising: a basket, wherein at least one of the legs is movable independently of at least one of the other legs.

  The above and other objects, aspects, features and advantages of the present invention will become more apparent from the following description and appended claims.

  In the drawings, like reference numbers generally represent identical parts throughout the different views. Also, the drawings are not necessarily to scale when illustrating the principles of the invention, and are generally emphasized.

(Explanation)
Referring to FIG. 1A, a medical retrieval device 15 for retrieving foreign material from a biological material or body includes a distal basket 10, a proximal handle 12, and a sheath 14 disposed therebetween. The sheath 14 has at least one lumen 11 therein. The basket 10 is movable relative to the sheath between a collapsed position and an extended position, which is shown unfolded in the closed position in FIG. 1A. In one embodiment, basket 10 includes a non-perforated tip 16 and a plurality of legs 28. Each of the legs 28 has a distal end 8 at the tip of the basket 10 and a proximal end 6 at the base of the basket 10. The distal end 8 of each leg gathers at the tip 16 and the proximal end 6 of each leg extends at least to the distal end 20 of the sheath 14.

  In the disclosed embodiment, the basket legs are made from a metal wire, but various other materials such as polymers can be used to form the legs. The sheath 14 is typically made from a biocompatible material such as plastic.

  With continued reference to FIG. 1A, one or more lumens 11 extend into the sheath 14 and are defined by the sheath 14. In one embodiment, there is one lumen 11 and each proximal end 6 of the leg 28 extends into the lumen 11. In one embodiment, each basket leg 28 extends individually the entire length of the sheath 14. As each leg 28 extends from the basket tip 16 to the actuation handle 12, several modes of actuation can be achieved by keeping them independent. For example, all basket legs can be actuated together equally, or independent actuation of the legs can be performed. By actuating only one or two legs, this basket can be manipulated or tilted in a body tract, thereby the ability to manipulate, capture or release stones Is increased.

  Referring to FIG. 1B in another embodiment of the present invention, one or more elongate members 22 disposed in the lumen 11 (s) act on the proximal end 6 of one or more basket legs 28. Installed as possible. These remaining legs can be attached to another elongate member or to a fixed point, such as the distal end 20 of the sheath 14. The elongate member 22 (s) is slidably movable in the lumen 11 of the sheath 14, which can be a shaft, wire, coil, cable, or assembled in various other ways. In the disclosed embodiment, member 22 or members are generally single chain metal wires. The proximal end 24 of the elongate member 22 may be attached to an actuation device such as a slider 44 at the handle 12. As the slider 44 is advanced or retracted, one or more basket legs 28 attached to the distal end 24 of the elongated member 22 (s) are advanced or retracted. Alternatively, device 15 may be configured to achieve movement of sheath 14 across member 22 (s), but that is not shown.

  In the disclosed embodiment, the tip 16 is not perforated as shown in FIG. 1C. That is, the tip 16 does not have an opening there. As shown in FIG. 1C, basket tip 16 is not flat and has buttons, knobs, or other protrusions, such as shown in FIG. These collect the distal ends of the basket legs and group them together.

  Referring to FIGS. 1D and 1E, in an alternative embodiment of the invention, the basket has two or more separate loops that intersect at the distal end of the basket. The loops are loose, i.e., the loops are not connected to each other at the distal end of the basket, are not fixed, or are not attached. The width of the space between the loops at the distal end of the basket can be varied when the unfixed loop at the distal end of the basket is extended.

  Referring to FIGS. 1A-D and other drawings, a basket having four legs is shown and described, but it should be understood that any number of legs is possible. In general, more than two legs are required to form a basket as illustrated in FIG. 1E, and the three loops of the basket form a basket with six legs.

  In one embodiment, as shown in FIG. 2 with the basket 10 in the extended closed position, one of the legs (28) of the basket 10 is the first within the first lumen 11 of the sheath 14. Attached to the distal end 24 of the elongated member 22, the three other legs (30, 32, 34) of the basket 10 are attached to the second elongated member 23 of the second lumen 25 of the basket 10. Mounted at the base 18. Referring to FIG. 3, when the first elongate member 22 is advanced toward the distal end 20 of the sheath 14, the legs 28 extend further from the sheath 14 than the other basket legs 30, 32 and 34. , Thereby bending the legs 28 outward and changing or tilting the shape of the extended basket 10 to the extended open position.

  Referring to FIG. 4A, in another embodiment, two of the legs (28, 30) are attached to the distal end 24 of the first elongate member 22 and the remaining two legs (32, 34). ) Is attached to the distal end of the second elongate member 23. The two elongate members 22 and 23 are confined within the first lumen 11 and the second lumen 25 of the sheath 14, respectively. When the first elongate member 22 is advanced toward the distal end 20 of the sheath 14, the legs 28 and 30 are over-extended from the end of the sheath 14 thereby moving the basket 10 and its symmetry. Change the shape. In FIG. 4B, the basket 10 is shown with the legs 28 and 30 over-extended so that the basket 10 assumes a tilted shape in the extended open position.

  In another embodiment, as illustrated in FIG. 4C, each leg may be contained within a single common axially disposed lumen 11. In this embodiment, the entire basket can be retracted into a single lumen, with the basket in the collapsed position as shown.

  In other embodiments of the present invention, various of the legs may be attached to a particular elongated member. As illustrated in FIG. 4D, there may be elongate members and lumens similar to the number of legs. Multiple lumens 11 are provided in the embodiment of the sheath 14 shown in FIG. 4D and each lumen 11 is designed to fit a separate member of the elongate member 22. Whatever combination of leg and elongate member, this combination results in a device 15 having a basket 10 with one or more separately actuatable legs, the , Which can be steered, tilted, and generally manipulated into a variety of positions and configurations beyond simply unfolded and crushed, this maneuverability or dansability Allows the operator to more easily capture stones and other materials using the basket legs.

  With reference to FIGS. 5A-5E, the device 15 of the present invention can be used in clinical applications to recover biological or foreign material from the body. For example, the single lumen device of FIG. 4C can be used to retrieve stones 40 (eg, stones such as gallbladder, biliary tree, ureter, kidney, bladder, urethra, etc.). It can also be used to capture thrombi or emboli in blood vessels such as the coronary or pulmonary vasculature of the heart. Apart from exactly what is withdrawn, the device 15 with the basket 10 enclosed within the sheath 14 of the device is inserted into the body tract 42. The path 42 can be a bodily canal, duct, tube, passage, blood vessel, or opening. As the distal end 20 of the sheath 14 approaches the calculus 40 or other material, the basket 10 advances the slidably movable elongated members 22 and 23 toward the distal end 20 of the sheath 14 to advance the sheath. 14 is deployed from the distal end 20 (FIG. 5B). In another alternative embodiment, the sheath 14 can be retracted relative to the elongated members 22 and 23, thereby extending the basket 10 from the distal end of the sheath 14.

  After the basket is deployed to form a uniform three-dimensional basket shape (FIG. 5B) in its closed position, the single actuatable leg 28 is over-extended by further advancing the elongate member 22 independently. . Thus, the basket moves from the closed position shown in FIG. 5B to the open position shown in FIG. 5C. The distance between the leg 28 and the legs 30, 32 and 34 is thereby increased in size. In this way, the basket is operated to catch the calculus 40 by actuating the legs 28. The individually actuable legs 28 are then independently elongated members 22 (FIG. 10) until the inner surface of the legs 28 and the inner surfaces of the other legs 30, 32, 34 substantially contact the calculus 40. 5D) is retracted into the sheath 14 by retracting. Now, the elongate members 22, 23 can be further retracted into the sheath 14 and all of the legs 28, 30, 32, 34 can be pulled back and around the calculus 40 towards the distal end of the sheath. By this, the calculus 40 can be completely captured by the basket. The device 15 with the calculus 40 thus captured by the basket is now withdrawn from the path 42 by the operator.

  In accordance with the present invention, other mechanisms for providing individual leg operability are possible. 6A-6E, the device 15 includes a slidably movable ring 52, a coloring stop 54, a positive return ring stop 60, and a plurality of second elongated members 56, 56 within the lumen 11 of the sheath 14. '(Which is operably attached to legs 50-50' and ring 52). Each basket leg 28, 28 ′, 50, 50 ′ is operably attached to the distal end 24 of the first elongate member 22 at its proximal end 6 of the basket base 18. Slidably movable in the lumen 11 of the sheath 14. Second elongate members 56, 56 'are operatively mounted at one end to proximal portions 58, 58' of legs 50, 50 ', respectively. The second elongate members 56, 56 ′ extend longitudinally within the lumen 11 of the sheath 14 and are operably attached to the ring 52 at the other end. Ring 52 surrounds first elongate member 22 within lumen 11 of sheath 14. The ring 52 is slidably movable within the lumen 11 over the first elongate member 22. A collar ring stop 54 is disposed on the inner surface of the sheath 14 and stops the ring 52 from further axial advancement in the direction of the distal end 20 of the sheath 14. The positive return ring stop 60 is attached to the elongate member 22 and is retracted into the collar ring 52 as the elongate member 22 is retracted into the lumen 11 in a direction opposite to the distal end of the sheath 20.

  In other embodiments, the second elongate member may be attached to one or more basket legs. For example, as illustrated in FIG. 6D, the second elongate members 56, 56 ′, 56 ″ and 56 ′ ″ are respectively the basket legs 58, 58 ′, 58 ″ and 58 ′ ″. It is attached to each. FIG. 6E shows a different configuration of the attachment portion 58 of the second elongated member to one or more basket legs.

  During surgery, as shown in FIGS. 6B and 6C, as the first elongate member 22 is moved axially in the direction of the distal end 20 of the sheath 14, the basket 10 is advanced out of the sheath 14, At the same time, the ring 52 is advanced through the lumen 11 of the sheath 14 until the ring 52 meets the coloring stop 54. Further advancement of the ring 52 is prevented by the coloring stop 54. As the first elongate member 22 advances further axially within the lumen 11, the second elongate member 56, 56 '(which is attached to the ring 52 and the legs 50, 50') Prevent further advancement of the legs 50, 50 'in the axial direction. Thus, the legs 50, 50 'bend outwardly like a bow as the first elongate member 22 further advances the legs 28, 28', thereby changing the shape of the open basket, As a result, it takes the form of a mushroom-like contour.

  Referring back to FIG. 6A, the basket 10 is retracted into the sheath 14 by retracting the elongate member 22 away from the distal end 20 of the sheath 14. As elongate member 22 moves through lumen 11 of sheath 14, positive ring stop 60 hits collar 52. When the positive ring stop 58 hits the collar ring 52, the positive ring stop 60 moves the collar ring 52 with the elongated member and in the same direction as the elongated member 22 as the elongated member 52 is pulled into the lumen 11 of the sheath 14. To do.

  In all embodiments according to the present invention, the basket provides an expansion force that was not achievable with conventional baskets. This is due to external forces supplied by the user by moving one or more legs further than is possible using known baskets. This external force is supplied by the operator's hand, improving the performance of the basket and providing an improved expansion force.

  In another aspect of the invention, all or a portion of the internal surface of one or more basket legs is used to improve capture and retention of substances such as stones, possibly also to crush or destroy the material, It can be coarse. The roughness of the internal surface (s) can be created by serrations, etching, teeth, or points on or in the internal surface (s). One or more basket legs may have this rough internal surface.

  Variations, modifications, and other implementations of what is described herein will occur to those skilled in the art without departing from the spirit and scope of the claimed invention. Accordingly, the invention should not be defined by the foregoing description, but by the spirit and scope of the appended claims.

FIG. 1A is a plan view of a medical retrieval device with legs that extend along the entire length of the sheath to an operating handle. FIG. 1B is a plan view of a medical retrieval device comprising at least one elongate member within the lumen of the sheath. FIG. 1C is an end view of an unperforated tip of a basket according to the present invention. FIG. 1D shows another basket of the present invention formed from at least two loops that are not connected at the location where they intersect at the distal end of the basket. FIG. 1E shows another basket of the present invention, similar to FIG. 1C, where the basket is formed from a plurality of loops, where these loops intersect at the distal end of the basket. Are not connected. FIG. 2 is a plan view of one embodiment of a device according to the invention, wherein the basket of the device is in an extended closed position, with one operable leg, two elongate members, and a sheath. Has two lumens. FIG. 3 shows another basket similar to that of FIG. 2, where the basket is in the extended open position. FIG. 4A is a plan view of one embodiment of a basket according to the present invention, wherein the basket is in an extended closed position, with a pair of operable legs, two elongate members, and a single within a sheath. With a lumen. FIG. 4B shows the basket of FIG. 4A in the extended open position. FIG. 4C shows the basket of FIG. 4A in a sheath, where the sheath defines only a single lumen therein. FIG. 4D is an end view of another embodiment of the present invention showing a plurality of elongate members and lumens within the sheath. FIG. 5A is a schematic depiction of the clinical application of one embodiment of the device shown in FIGS. 4A, 4B, and 4C. FIG. 5B is a schematic depiction of the clinical application of one embodiment of the device shown in FIGS. 4A, 4B, and 4C. FIG. 5C is a schematic depiction of the clinical application of one embodiment of the device shown in FIGS. 4A, 4B, and 4C. FIG. 5D is a schematic depiction of the clinical application of one embodiment of the device shown in FIGS. 4A, 4B, and 4C. FIG. 5E is a schematic depiction of the clinical application of one embodiment of the device shown in FIGS. 4A, 4B, and 4C. FIG. 6A shows another embodiment of a medical retrieval device according to the present invention and that device in use. FIG. 6B shows another embodiment of a medical retrieval device according to the present invention and that device in use. FIG. 6C shows another embodiment of a medical retrieval device according to the present invention and that device in use. FIG. 6D shows a three-dimensional view of the basket of the present invention with the sheath removed, wherein a second elongate member is attached to each basket leg. 6E is an end view of the proximal portion of the basket, showing a different configuration of the attachment site where one or more second elongate members are attached to the proximal portion of the basket leg.

Explanation of symbols

6 Basket proximal end
8 Basket distal end
10 Distal basket
11 Lumen
12 Proximal handle
14 sheath
15 Medical recovery device
16 Non-perforated tip
20 Sheath distal end
22, 23 Elongated member
24 Elongate member end
28, 30, 32, 34 Basket leg
44 Slider

Claims (1)

A medical recovery device,
A proximal handle;
A sheath extending from the handle and containing a lumen, the sheath having a distal end remote from the handle;
At least one elongated member;
A basket including a distal end and a base, wherein the basket and the sheath are movable relative to each other to achieve a collapsed position of the basket and an extended position of the basket; The basket resides within and is constrained by the sheath in the sheath, and in the extended position, the basket extends from the distal end of the sheath and from the lumen of the sheath. A basket that exits in a three-dimensional shape and includes at least three legs connected to the distal end of the leg at the distal end of the basket, each leg being at least one elongated member; A basket that is fixedly mounted and wherein at least one of the legs is movable independently of at least one of the other legs within the lumen of the sheath;
Including the device.

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