JP2013240520A - Medical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem of a medical instrument wherein a small foreign object can not be collected.SOLUTION: A medical instrument to collect an object to be collected inside a human body includes a film which is housed in a folded state in a sheath and which is extruded from the sheet to collect the object to be collected in an unfolded state. The medical instrument may further includes a shape adjusting part to fold or unfold the film outside the sheath. The film in the unfolded state may constitute at least part of a bag-shaped or umbrella-shaped member with an open end and a closed end. The shape adjusting part may adjust the opening area of the open end by folding or unfolding the film.

Description

  The present invention relates to a medical device.

When collecting or removing foreign substances existing in the body such as stones and thrombus, medical devices using wires or nets are used (for example, see Patent Documents 1 to 5).
[Patent Literature]
Patent Literature 1 International Publication No. 2005/034774 Patent Literature 2 Japanese Unexamined Patent Publication No. 2006-116326 Patent Literature 3 Japanese Unexamined Patent Publication No. 2006-314811 Patent Literature 4 International Publication No. 2001/080748 Patent Literature 5 Japanese Unexamined Patent Publication No. 2002-159503

  Conventionally, it is assumed that small foreign matters are naturally discharged outside the body, and there is no idea of collecting or removing even small foreign matters. For this reason, the opening of the wire or net is about 0.5 to 3 mm, and foreign matters smaller than this cannot be collected.

  In the first aspect of the present invention, there is provided a medical device for collecting an object to be collected inside a body, which is accommodated in a sheath in a folded state and pushed out from the sheath and spread in an expanded state. A medical device is provided that includes a film that collects.

  The medical device may further include a shape adjusting unit that folds or unfolds the film outside the sheath. In the above medical device, the film may constitute at least a part of a bag-like or umbrella-like member having an open end and a closed end in a spread state, and the shape adjusting unit may fold or spread the film. By doing so, you may adjust the open area of an open end. The medical device may further include a liquid discharge unit that discharges the liquid collected by the film when the film is folded.

  In the medical device described above, the film may have a convex portion that is convex in a direction from the proximal end side of the sheath toward the distal end side of the sheath in a spread state. It may be collected in a depression on the proximal end side of the part. The medical device may further include a plurality of flexible wires or a plurality of wires made of a shape memory alloy, each of the plurality of wires may support a film, and each of the plurality of wires At least one end may be rounded or blunted.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

An example of the foreign material collection | recovery apparatus 100 is shown schematically. An example of collection part 230 is shown roughly. An example of collection part 330 is shown roughly. An example of collection part 430 is shown roughly. An example of collection part 530 is shown roughly. An example of collection part 630 is shown roughly. An example of collection part 730 in the state before deployment is shown roughly. An example of collection part 730 in the state after deployment is shown roughly.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention. In addition, embodiments will be described with reference to the drawings, but in the description of the drawings, the same or similar parts may be denoted by the same reference numerals and redundant description may be omitted. The drawings are schematic, and the relationship between the thickness and the planar dimensions, the ratio, and the like may be different from the actual ones. In addition, for convenience of explanation, there may be a case where the drawings have different dimensional relationships or ratios.

  FIG. 1 schematically shows an example of the foreign material recovery apparatus 100. In the present embodiment, the foreign material recovery apparatus 100 includes a sheath 102, a connector unit 104, a cap 106, a reinforcing unit 108, an operation handle 110, an operation wire 120, and a collection unit 130. In the present embodiment, the collection unit 130 includes a connection chip 134, a tip chip 136, a wire 138, and a film 140. In the present embodiment, the collection unit 130 has a plurality of wires 138. In the present embodiment, the film 140 has an open end 142 and a closed end 144. FIG. 1 schematically illustrates an example of a state in which the collection unit 130 is pushed out of the sheath 102 and expanded.

  The foreign object collection apparatus 100 collects a collection object inside the body. Examples of collection objects include stones and blood clots. The calculus may be a calculus formed in the bile duct, pancreatic duct, ureter, gallbladder, bladder, kidney and the like. The foreign material recovery apparatus 100 may be used via an endoscope or a laparoscope. The foreign body recovery apparatus 100 may be used without the assistance of an endoscope or a laparoscope. The foreign material recovery apparatus 100 may be an example of a medical tool.

  The sheath 102 accommodates the collection unit 130 so as to be able to advance and retract. For example, when the foreign substance recovery apparatus 100 is used via an endoscope or a laparoscope, the sheath 102 is inserted into a forceps port of the endoscope or laparoscope. The sheath 102 is preferably flexible. The sheath 102 is preferably biocompatible and inert to body fluids. As the material of the sheath 102, synthetic resins such as polytetrafluoroethylene (PTFE) resin, polyethylene terephthalate (PET) resin, polyethylene (PE) resin, polypropylene (PP) resin, polyvinyl chloride (PVC) resin, nylon, silicone, etc. May be used. As a material of the sheath 102, a composite material of the above synthetic resin and a metal coil or a metal mesh may be used.

  The connector unit 104 is used to insert another device into the sheath 102. In the present embodiment, the connector unit 104 is connected to the collection unit 130 via the operation wire 120. The connector unit 104 may be connected to the calculus breaking device when a calculus breaking device (not shown) is inserted into the sheath 102. The connector portion 104 may be used for injecting a drug into the sheath 102. In the present embodiment, by removing the cap 106 and introducing a drug such as a contrast medium into the connector unit 104, the drug can be injected into the sheath 102.

  The reinforcing portion 108 prevents the connection portion between the sheath 102 and the connector portion 104 from being bent. The operation handle 110 is attached to the proximal end of the operation wire 120 and operates the collection unit 130. The operation handle 110 can be used to operate at least one of the advancement / retraction, contraction, and expansion of the collection unit 130. For example, the collection unit 130 can be pushed out of the sheath 102, the collection unit can be moved in the body to collect a collection target, or the collection unit 130 can be accommodated in the sheath 102.

  The operation wire 120 has one end connected to the collection unit 130 and the other end connected to the operation handle 110. The operation wire 120 is preferably not flexible and flexible. As the material of the operation wire 120, stainless steel, nickel titanium alloy, or the like may be used.

  The collection unit 130 is accommodated in the sheath 102 in a contracted state. The collection unit 130 is pushed out of the sheath 102 and expands. When pushed out from the sheath 102, the collection unit 130 expands into a predetermined shape and deforms into a shape for collecting the collection object. The collection unit 130 collects the collection object in an expanded state. The collection unit 130 may be an example of a medical device.

  The collection unit 130 may have a basket-like shape in an expanded state. The collection unit 130 may have a bag-like or umbrella-like member having an open end and a closed end. Thereby, the collection part 130 can be accommodated in the sheath 102 in the state which collected the collection | recovery target object. Moreover, when the collection object is crushed in a state where the collection object is held inside the bag-like or umbrella-like member, scattering of fragments of the collection object can be suppressed.

  For example, when collecting calculus fragments using a mesh used as a backstop when crushing the calculus, the calculus fragments can be scraped up to the vicinity of the sheath 102, but the calculus fragments are sheathed. It is difficult to transfer to the inside of 102. However, when a bag-shaped or umbrella-shaped member is used, calculus or calculus fragments are collected in the bag-shaped or umbrella-shaped member, so that the calculus fragments can be easily moved into the sheath 102. Can be transported.

  The connection chip 134 may fix at least one end of the wire 138. The connection chip 134 may bind a plurality of wires 138. The connection chip 134 may be connected to one end of the operation wire 120. The tip end 136 may fix at least one end of the wire 138. The distal tip 136 may bind a plurality of wires 138. As long as a plurality of wires can be bound or fixed, the connection chip 134 and the tip chip 136 may be omitted. The operation wire 120 may be formed by combining a plurality of wires 138, or the operation wire 120 may be branched to form a plurality of wires 138.

  The wire 138 forms the skeleton of the collection unit 130. The wire 138 may have flexibility. Thereby, self-expandability can be imparted to the collection unit 130. That is, when the collecting unit 130 is pushed out of the sheath 102, the collecting unit 130 expands spontaneously. In the present embodiment, when the operation handle 110 is operated to house the collection unit 130 inside the sheath 102, the wire 138 is pressed against the sheath 102 and deforms, and the collection unit 130 contracts.

  The material, shape, diameter, and number of the wires 138 are not particularly limited, and may be determined according to the location where the collection unit 130 is used, the size of the collection object, and the like. As the material of the wire 138, stainless steel, nickel titanium alloy, or the like may be used.

  As another method of deforming the wire when the collecting unit 130 is pushed out of the sheath 102, a wire made of a shape memory alloy may be used as at least one of the plurality of wires 138. Further, an urging member such as a spring or rubber may be arranged so that the wire 138 is deformed when the collecting unit 130 is pushed out of the sheath 102.

  The wire 138 may support the film 140. For example, each of the plurality of wires 138 is attached to the film 140 to support the film 140. Thereby, the film 140 can be folded or expanded by the wire 138 contracting or expanding. The wire 138 may be an example of a support portion that supports the film.

  One end of the wire 138 may be fixed by the connection tip 134, and the other end may be fixed by the tip end 136. Both ends of the wire 138 may be fixed by either one of the connection chip 134 or the tip chip 136, and a portion near the center of the wire 138 may be fixed by the other of the connection chip 134 or the tip chip 136.

  At least one end of the wire 138 may be rounded. At least one end of the wire 138 may be blunted. Since the end portion of the wire 138 is rounded or blunted, the patient can be prevented from being injured during the operation of the collecting unit 130.

  The film 140 is accommodated in the sheath 102 in a folded state. When the film 140 is pushed out of the sheath 102, the film 140 expands and deforms into a shape for collecting the collection target. The film 140 collects collection objects in a spread state. The film 140 may be self-expanded and spread into a predetermined shape. The film 140 may be supported by another member such as the wire 138 and spread into a predetermined shape as the other member expands. The film 140 may be an example of a medical device.

  As a material of the film 140, synthetic resins such as polytetrafluoroethylene (PTFE) resin, polyethylene terephthalate (PET) resin, polyethylene (PE) resin, polypropylene (PP) resin, polyvinyl chloride (PVC) resin, nylon, silicone, etc. May be used. As the material of the film 140, fibers or sheets of the above synthetic resin may be used. As the material of the film 140, a composite material of the synthetic resin fiber or sheet and a metal coil or a metal mesh may be used.

  The film 140 has an opening with a hole diameter of 0.01 mm or more and less than 0.5 mm, preferably an opening with a hole diameter of 0.02 mm or more and less than 0.3 mm, more preferably 0.02 mm or more and less than 0.2 mm. Also good. As a result, it is possible to recover even a recovery object having a size that could not be recovered conventionally.

  The film 140 preferably has no opening with a hole diameter of 0.3 mm or more, more preferably has no opening with a hole diameter of 0.2 mm or more, and has an opening with a hole diameter of 0.05 mm or more. More preferably not. As a result, it is possible to recover even a recovery object having a size that could not be recovered conventionally.

  The film 140 may not have an opening having a hole diameter of 0.02 mm or more. Thereby, a finer collection object can be collected. In the case where an opening having a hole diameter of 0.01 mm or more and less than 0.02 mm is formed in the film 140, the film 140 can transmit the liquid, so that the recovery operation can be performed efficiently. The film 140 may not have an opening having a hole diameter of 0.01 mm or more. In this case, since the film 140 does not allow liquid to pass through, almost all the fragments can be recovered outside the body.

  The film 140 may constitute at least a part of a bag-like or umbrella-like member having an open end and a closed end in a spread state. Thereby, the collection part 130 can be accommodated in the sheath 102 in the state which collected the collection | recovery target object in the bag-shaped or umbrella-shaped member formed with the film 140. FIG. Moreover, when the collection object is crushed in a state where the collection object is held inside the bag-like or umbrella-like member, scattering of fragments of the collection object can be suppressed. The bag-like or umbrella-like member may be constituted by a single film 140 or may be constituted by a plurality of films 140.

  In the present embodiment, the film 140 is attached to a wire 138 that is curved in an arc shape, and forms a bag-like member having an open end 142 and a closed end 144. In the present embodiment, the film 140 in a spread state protrudes in the direction from the proximal end P side (right side in the figure) to the distal end D side (left side in the figure) (from right to left in the figure). Convex part which becomes convex). By operating the operation handle 110 in a state where the film 140 is sufficiently spread and pulling the collecting portion 130 toward the proximal end P, the film 140 is collected in a recess on the proximal end P side of the convex portion. Collect things.

  By operating the operation handle 110 to further draw the collection unit 130 toward the proximal end P, a part of the wire 138 of the collection unit 130 is drawn into the sheath 102. While the expansion of the wire 138 is pressed by the sheath 102, the collection unit 130 is further pulled toward the proximal end P side, whereby the entire collection unit 130 can be accommodated in the sheath 102.

  FIG. 2 schematically shows an example of the collection unit 230. The collection unit 230 shows another embodiment of the collection unit 130. The collection unit 230 may be an example of a medical device. The collection unit 230 is different from the collection unit 130 in that it includes a net 240. About another structure, you may have the structure similar to the collection part 130. FIG. The description of the configuration having the same configuration as that of the collection unit 130 is omitted.

  The net 240 discharges the liquid collected by the film 140 when the film 140 is folded. In the present embodiment, the net 240 forms a bag-like member having an open end 142 and a closed end 144 together with the film 140. In the present embodiment, the net 240 is formed over the entire circumference on the open end 142 side of the bag-like member. Since the bag-shaped member has the net 240, the collecting unit 230 can be easily contracted.

  The net 240 may be a net made of a metal wire, may be a synthetic resin fiber, or may be one in which an opening is formed in a synthetic resin sheet. As the synthetic resin, the synthetic resin exemplified as the raw material of the film 140 may be used.

  The hole diameter or mesh of the net 240 may be 3 mm or less, preferably 0.5 mm or less, more preferably 0.01 mm or more and less than 0.5 mm, further preferably 0.02 mm or more and 0. It may be less than 3 mm, and more preferably 0.02 mm or more and less than 0.2 mm.

  The net 240 may be an example of a liquid discharge unit. In this embodiment, the case where the net | network 240 was formed over the perimeter of the open end 142 side of a bag-shaped member was demonstrated. However, the liquid discharge part is not limited to this. The liquid discharge part may be formed in a part of the periphery of the bag-like member on the open end 142 side. In the present embodiment, the case where the liquid discharge unit is arranged in the collection unit 230 has been described. However, the liquid discharge part is not limited to this. The liquid discharge unit may be disposed on the sheath 102. The liquid discharge part may be disposed in the vicinity of the distal end D of the sheath 102.

  FIG. 3 schematically illustrates an example of the collection unit 330. FIG. 3 shows the collection unit 330 together with the sheath 102 and the operation wire 120. The collection unit 330 represents another embodiment of the collection unit 130. The collection unit 330 may be an example of a medical device. The collection unit 330 is different from the collection unit 130 in that it includes an adjustment member 350. About another structure, you may have the structure similar to the collection part 130 or the collection part 230. FIG. The description of the same configuration as that of the collection unit 130 or the collection unit 230 is omitted.

  In the present embodiment, the adjustment member 350 includes an adjustment wire 352 and a frame member 354. The adjustment member 350 is inserted into the sheath 102 and is housed in the sheath 102 so as to advance and retract. One end of the adjustment member 350 is connected to the operation handle 110 via the connector unit 104. The advancement / retraction of the adjustment member 350 is operated using the operation handle 110. The other end of the adjustment member 350 is inserted into the body via the distal end D of the sheath 102.

  The adjustment member 350 folds or unfolds the film 140 outside the sheath 102. In the present embodiment, the adjustment member 350 contracts or expands the collection unit 330 in a state where the collection unit 330 is pushed out of the sheath 102. Thereby, the shape of the adjustment member 350 film can be adjusted. The adjusting member 350 adjusts the cross-sectional area (may be referred to as an open area) of the open end 142 by folding or spreading the film 140. The adjustment member 350 may be an example of a shape adjustment unit.

  By including the adjustment member 350 in the foreign material recovery apparatus 100, the shape of the film 140 can be adjusted even when the entire film 140 exists outside the sheath 102. Regardless of the positional relationship between the sheath 102 and the film 140, the shape of the film 140 can be adjusted, so that the degree of freedom of the recovery operation and the calculus crushing operation is improved.

  Further, since the collecting unit 330 can be contracted outside the sheath 102, the contraction speed of the collecting unit 330 can be controlled as compared with the case where the collecting unit 330 is contracted when accommodated in the sheath 102. it can. Therefore, when the collection part 330 contracts, it can suppress that the collected collection | recovery target object scatters.

  One end of the adjustment wire 352 is connected to the operation handle 110 via the connector portion 104, and the other end is connected to the frame member 354. The adjustment wire 352 may be inserted into the sheath 102 and accommodated in the sheath 102 so as to be able to advance and retract. The adjustment wire 352 is preferably not flexible and has flexibility. As the material of the adjustment wire 352, stainless steel, nickel titanium alloy, or the like may be used.

  The frame member 354 may be an example of a transmission member that transmits a force for adjusting the shape of the film 140 to the film 140 in a state where the film 140 is outside the sheath 102. In the present embodiment, the frame member 354 transmits the force applied to the adjustment wire 352 to the collection unit 330. Thereby, the collection unit 330 can be contracted or expanded.

  The frame member 354 has an opening. Examples of the cross-sectional shape of the opening of the frame member 354 include a circle, an ellipse, a quadrangle, a diamond, a polygon, a star shape, and a hollow square star shape. The dimension of the opening of the frame member 354 may be smaller than the dimension of the inner surface of the sheath 102. The outer dimension of the frame member 354 may be smaller than the inner surface dimension of the sheath 102. The frame member 354 preferably has rigidity. As the material of the frame member 354, stainless steel, nickel titanium alloy, or the like may be used.

  In the present embodiment, the frame member 354 is arranged so that the operation wire 120 passes inside the opening of the frame member 354. When the user operates at least one of the operation wire 120 and the adjustment wire 352 and presses the frame member 354 against the collection unit 330, the opening of the frame member 354 suppresses the expansion of the wire 138 and the outer periphery of the collection unit 330. Move along. Thereby, the collection unit 330 can be contracted. On the other hand, when the user operates at least one of the operation wire 120 and the adjustment wire 352 and moves at least one of the collection unit 330 and the frame member 354 in a direction in which both are separated, the collection unit 330 can be expanded.

  FIG. 4 schematically shows an example of the collection unit 430. FIG. 4 shows the collection unit 430 together with the sheath 102 and the operation wire 120. The collection unit 430 shows another embodiment of the collection unit 130. The collection unit 430 may be an example of a medical device. The collection unit 430 is different from the collection unit 130 in that the collection unit 430 includes an adjustment wire 452 and a guide member 454. About another structure, you may have the structure similar to the collection part 130, the collection part 230, or the collection part 330. FIG. The description of the same configuration as that of the collection unit 130, the collection unit 230, or the collection unit 330 is omitted.

  The adjustment wire 452 may be an example of a shape adjustment unit. At least one end of the adjustment wire 452 is connected to the operation handle 110 via the connector unit 104. The adjustment wire 452 is coupled to the wire 138 via the guide member 454. The adjustment wire 452 may be coupled to at least one of the plurality of wires 138. The adjustment wire 452 may be inserted into the sheath 102 and accommodated inside the sheath 102 so as to be able to advance and retract. The adjustment wire 452 preferably has flexibility. Stainless steel, nickel titanium alloy, or the like may be used as the material of the adjustment wire 452.

  In the present embodiment, the adjustment wire 452 is fixed to one of the guide members 454 so as to be coupled to the wire 138 corresponding to the guide member 454. The adjustment wires 452 are held by other guide members 454 so as to be movable, so that the adjustment wires 452 are coupled to the wires 138 corresponding to the respective guide members 454.

  The adjustment wire 452 may be connected to the operation handle 110 through the opening 435 disposed in the connection tip 134. Thereby, the force applied to the adjustment wire 452 can be made to act on the collection part 430 efficiently.

  The guide member 454 may be an example of a transmission member that transmits a force for adjusting the shape of the film 140 to the film 140 in a state where the film 140 is outside the sheath 102. In the present embodiment, the guide member 454 is attached to the wire 138 and transmits the force applied to the adjustment wire 452 to the collection unit 430. Thereby, the collection unit 430 can be contracted or expanded.

  The guide member 454 may have an opening through which the adjustment wire 452 passes. The guide member 454 preferably has rigidity. As the material of the guide member 454, stainless steel, nickel titanium alloy, or the like may be used.

  According to the present embodiment, when the user pulls the adjustment wire 452, the collection unit 430 can be contracted. When the collection unit 430 has self-expandability, the collection unit 430 can be expanded by loosening the force with which the user pulls the adjustment wire 452. When the adjustment wire 452 is not easily bent, the collection unit 430 may be expanded by pushing the adjustment wire 452 by the user. Accordingly, the film 140 can be folded or spread outside the sheath 102.

  In the present embodiment, the case where one end of the adjustment wire 452 is fixed to one of the guide members 454 and is held movably by the other guide members 454 has been described. However, the adjustment wire 452 is not limited to this. One end of the adjustment wire 452 may be branched into a plurality of wires, and the adjustment wire 452 may be fixed to each of the plurality of wires 138. The adjustment wires 452 are movably held by the guide members 454 so that the adjustment wires 452 are coupled to the wires 138 corresponding to the respective guide members 454, and both ends of the adjustment wires 452 are connected via the sheath 102 and the connector portion 104. The operation handle 110 may be connected.

  In the present embodiment, the case where the adjustment wire 452 is connected to the operation handle 110 through the opening 435 provided in the connection chip 134 has been described. However, the method for efficiently applying the force applied to the adjustment wire 452 to the collection unit 430 is not limited to this. A guide member having an opening for allowing the adjustment wire 452 to pass therethrough may be disposed on a part of the operation wire 120, and the adjustment wire 452 may be connected to the operation handle 110 through the opening of the guide member. The guide member may be disposed at a position closer to the connection chip 134 than the middle point of the adjustment wire 452.

  FIG. 5 schematically illustrates an example of the collection unit 530. FIG. 5 shows the collecting unit 530 together with the sheath 102 and the operation wire 120. The collection unit 530 shows another embodiment of the collection unit 130. The collection unit 530 may be an example of a medical device. The collection unit 530 is different from the collection unit 130 in that it includes an adjustment wire 452. Other configurations may be similar to those of the collection unit 130, the collection unit 230, the collection unit 330, or the collection unit 430. The description of the same configuration as that of the collection unit 130, the collection unit 230, the collection unit 330, or the collection unit 430 is omitted.

  In the present embodiment, the adjustment wire 452 is coupled to the tip end 136. Accordingly, when the user pulls the adjustment wire 452, the collection unit 430 can be contracted. On the other hand, the collection unit 430 can be expanded by loosening the force with which the user pulls the adjustment wire 452. As a result, the film 140 can be folded or spread outside the sheath 102.

  FIG. 6 schematically illustrates an example of the collection unit 630. FIG. 6 shows the collecting unit 630 together with the operation wire 120. The collection unit 630 shows another embodiment of the collection unit 130. The collection unit 630 may be an example of a medical device. The collection unit 630 is different from the collection unit 130 in that the film 140 mainly forms at least a part of an umbrella-shaped member having an open end and a closed end. The collection unit 630 is different from the collection unit 130 in that it includes an adjustment wire 652 and a guide member 635. Other configurations may be similar to those of the collection unit 130, the collection unit 230, the collection unit 330, the collection unit 430, or the collection unit 530. The description of the same configuration as that of the collection unit 130, the collection unit 230, the collection unit 330, the collection unit 430, or the collection unit 530 is omitted.

  In the present embodiment, one end of the wire 138 is fixed to the connection chip 134 and the other end is a free end. Note that both ends of the wire 138 may be free ends, and a portion near the center of the wire 138 may be fixed to the connection chip 134. The end on the free end side of the wire 138 is preferably rounded or blunted.

  The adjustment wire 652 may be an example of a shape adjustment unit. At least one end of the adjustment wire 652 is connected to the operation handle 110 via the connector unit 104. Adjustment wire 652 is coupled to wire 138. The adjustment wire 452 may be coupled to at least one of the plurality of wires 138. In the present embodiment, one end of the adjustment wire 652 is branched into a plurality of wires, and the adjustment wire 652 is fixed to each of the plurality of wires 138.

  The adjustment wire 652 may be inserted into the sheath 102 and housed inside the sheath 102 so as to be able to advance and retract. The adjustment wire 652 preferably has flexibility. As the material of the adjustment wire 652, stainless steel, nickel titanium alloy, or the like may be used. The adjustment wire 652 may be connected to the operation handle 110 through an opening formed in the guide member 635 disposed on the operation wire 120. The guide member 635 may be disposed at a position closer to the connection chip 134 than the middle point of the operation wire 120. Thereby, the force applied to the adjustment wire 652 can be efficiently applied to the collection unit 630.

  According to the present embodiment, when the user pulls the adjustment wire 652, the collecting unit 630 can be contracted. When the collection unit 630 has self-expandability, the collection unit 630 can be expanded by loosening the force with which the user pulls the adjustment wire 652. When the adjustment wire 652 has sufficient rigidity and a plurality of branched wires can be bent between the branch portion of the adjustment wire 652 and the wire 138, the user pushes the adjustment wire 652. The collection unit 630 may be expanded. Accordingly, the film 140 can be folded or spread outside the sheath 102.

  In the present embodiment, a case has been described in which one end portion of the adjustment wire 652 is branched into a plurality of wires, and each of the plurality of branched wires is fixed to each of the plurality of wires 138. However, the method for adjusting the shape of the film 140 is not limited to this. Also in the present embodiment, the technical idea related to the shape adjusting unit described with reference to FIGS. 3 to 5 may be applied.

  7 and 8 schematically show an example of the collection unit 730. FIG. 7 and 8 show the collecting unit 730 together with the operation wire 120. FIG. FIG. 7 schematically illustrates an example of the collection unit 730 in a state before deployment. FIG. 8 schematically illustrates an example of the collection unit 730 in a state after deployment.

  The collection unit 730 shows another embodiment of the collection unit 130. The collection unit 730 may be an example of a medical device. The collecting unit 730 mainly does not have a bag-like or umbrella-like member having an open end and a closed end before deployment, and is unfolded so that the bag-like or umbrella-like shape having an open end and a closed end is developed. It differs from the collection unit 130 in that members are formed. Other configurations may be the same as those of the collection unit 130, the collection unit 230, the collection unit 330, the collection unit 430, the collection unit 530, or the collection unit 630. The description of the same configuration as that of the collection unit 130, the collection unit 230, the collection unit 330, the collection unit 430, the collection unit 530, or the collection unit 630 is omitted.

  As shown in FIG. 7, in the present embodiment, the collection unit 730 includes a connection chip 134, a film 140, a frame member 738, a guide member 735, an adjustment wire 752, and a coupling member 754. As shown in FIG. 8, in the present embodiment, a bag-like or umbrella-like member having an open end and a closed end is formed by deforming the frame member 738 so as to warp outwardly outside the sheath 102. Formed (sometimes referred to as an unfolded state). The collection unit 730 may be further contracted in the expanded state after collecting the collection object, and housed in the sheath 102.

  In this embodiment, the frame member 738 has one end fixed to the connection chip 134 and the other end being a free end. Note that both ends of the frame member 738 may be free ends, and the vicinity of the center of the frame member 738 may be fixed to the connection chip 134. The end on the free end side of the frame member 738 is preferably rounded or blunted. The frame member 738 may have a configuration similar to that of the wire 138 of the collection unit 130, and description of the configuration similar to that of the wire 138 is omitted.

  In the present embodiment, one end of the film 140 is fixed to the connection chip 134. The film 140 is attached to the frame member 738. The film 140 is folded between the frame members 738 before the collection unit 730 is deployed, and is disposed between the frame members 738 in a spread state when the collection unit 730 is deployed.

  As shown in FIG. 8, when the film 140 is expanded, the film 140 protrudes in the direction from the proximal end P side of the sheath 102 to the distal end D side of the sheath 102 (from right to left in the figure). Convex portion). By operating the operation handle 110 in a state where the film 140 is sufficiently spread and pulling the collecting portion 130 toward the proximal end P, the film 140 is collected in a recess on the proximal end P side of the convex portion. Collect things.

  The adjustment wire 752 may be an example of a shape adjustment unit. One end of the adjustment wire 752 is connected to the operation handle 110 via the connector portion 104, and the other end is coupled to the frame member 738. In the present embodiment, the other end of the adjustment wire 752 is branched into a plurality of wires, and each of the plurality of branched wires is coupled to each of the plurality of frame members 738. In this embodiment, the adjustment wire 752 is coupled to the frame member 738 by the coupling member 754.

  The adjustment wire 752 may be inserted into the sheath 102 and housed inside the sheath 102 so as to be able to advance and retract. The adjustment wire 752 is preferably flexible. As the material of the adjustment wire 752, stainless steel, nickel titanium alloy, or the like may be used. The adjustment wire 752 may be connected to the operation handle 110 through an opening formed in the guide member 735 disposed on the connection chip 134. Thereby, the force applied to the adjustment wire 752 can be applied to the frame member 738 efficiently. The guide member 735 may be disposed on the operation wire 120. The guide member 735 may be disposed at a position closer to the connection chip 134 than the middle point of the operation wire 120.

  The coupling member 754 may be an example of a transmission member that transmits a force for adjusting the shape of the film 140 to the film 140 in a state where the film 140 is outside the sheath 102. The coupling member 754 is not particularly limited as long as it is a member that can couple the adjustment wire 752 and the frame member 738. The coupling member 754 may or may not fix the adjustment wire 752 and the frame member 738. Further, the adjustment wire 752 and the frame member 738 may be coupled without using the coupling member 754. For example, the adjustment wire 752 and the frame member 738 may be coupled by passing the adjustment wire 752 through an opening formed in the frame member 738.

  According to the present embodiment, when the user operates the operation wire 120 to push the collection unit 730 before deployment out of the sheath 102 and then pulls the adjustment wire 752, the frame member 738 warps outward. Transforms into Thereby, a bag-like or umbrella-like member having an open end and a closed end is formed. In this state, the collection target can be collected by operating the operation wire 120. After collecting the collection object, the collection wire 730 can be further contracted by pulling the adjustment wire 752, so that the cross-sectional area of the open end can be reduced. By operating the operation wire 120 in this state, the collection unit 730 can be accommodated in the sheath 102 while the collection unit 730 is deployed.

  According to this embodiment, the dimension of the collection part 730 before expansion | deployment can be made small. Therefore, even when the collection target closes the path in the body and the gap between the path in the body and the collection target is narrow, after the collection unit 730 is transferred to the other side of the collection target, the collection unit 730 Can be deployed.

  In the present embodiment, the case where one end portion of the adjustment wire 752 is branched into a plurality of wires and each of the branched wires is fixed to each of the plurality of frame members 738 has been described. However, the method for adjusting the shape of the film 140 is not limited to this. Also in the present embodiment, the technical idea related to the shape adjusting unit described with reference to FIGS. 3 to 5 may be applied.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

  The order of execution of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior to”. It should be noted that the output can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for convenience, it means that it is essential to carry out in this order. It is not a thing.

  DESCRIPTION OF SYMBOLS 100 Foreign material collection | recovery apparatus, 102 Sheath, 104 Connector part, 106 Cap, 108 Reinforcement part, 110 Operation handle, 120 Operation wire, 130 Collecting part, 134 Connection tip, 136 Tip tip, 138 Wire, 140 Film, 142 Open end, 144 Closed end, 230 collection unit, 240 net, 330 collection unit, 350 adjustment member, 352 adjustment wire, 354 frame member, 430 collection unit, 435 opening, 452 adjustment wire, 454 guide member, 530 collection unit, 630 collection unit, 635 Guide member, 652 Adjustment wire, 730 Collection part, 735 Guide member, 738 Frame member, 752 Adjustment wire, 754 Coupling member

Claims (6)

A medical device for collecting an object to be collected inside the body,
A film that is housed in a sheath in a folded state and that collects the collection object in a state of being pushed out of the sheath and spread;
Medical tools. Further comprising a shape adjusting unit that folds or spreads the film outside the sheath,
The medical device according to claim 1. The film constitutes at least a part of a bag-like or umbrella-like member having an open end and a closed end in a spread state;
The shape adjusting unit adjusts the open area of the open end by folding or spreading the film.
The medical device according to claim 2. A liquid discharger for discharging the liquid collected by the film when the film is folded;
The medical device according to any one of claims 1 to 3. The film has a convex portion that is convex in a direction from the proximal end side of the sheath toward the distal end side of the sheath in a spread state;
The collection object is collected in a depression on the proximal end side of the convex portion.
The medical device according to any one of claims 1 to 4. And further comprising a plurality of flexible wires or a plurality of wires made of a shape memory alloy,
Each of the plurality of wires supports the film,
Each of the plurality of wires has at least one end rounded or blunted,
The medical device according to any one of claims 1 to 5.

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