Indwelling device delivery device

Abstract

To provide an indwelling device delivery apparatus capable of easily placing an indwelling device in a body.SOLUTION: An indwelling device delivery apparatus 1 includes an indwelling device 11, a flexible first hollow shaft 21 having a first lumen 21h and detachably holding the indwelling device 11 at a tip end of the first lumen 21h, a second hollow shaft 31 extending from a base end of the first hollow shaft 21 in a proximal direction and having a second lumen 311h communicating with the first lumen 21h, and a pushing mechanism 51 for pushing the indwelling device 11 from the first hollow shaft 21 toward the distal direction via the first and second lumens 21h and 311h, where tensile rigidity of the second hollow shaft 31 is configured to be larger than the tensile rigidity of the first hollow shaft 21.SELECTED DRAWING: Figure 2A

Description

[Technical field]

[0001] The present invention relates to an indwelling device delivery apparatus. [Background technology]

[0002] 2. Description of the Related Art When performing surgery on an organ that is easily deformed, such as the lungs, a technique is known in which a marker is placed in advance near a lesion in the body in order to identify the lesion to be treated, such as by resection.

[0003] In such a technique, for example, a catheter with a wireless marker such as an IC tag attached to its distal end is fed into the vicinity of the lesion, and the wireless marker is pushed out of the catheter using a wire to leave it in the patient's body. Next, a wireless device placed outside the patient's body is used to wirelessly communicate with the wireless marker placed during surgery to identify the location of the lesion, while a prescribed treatment is performed (for example, see Patent Document 1).

[0004] According to this technology, even if the organ is deformed, the position of the lesion can be accurately identified using the wireless marker, and it is expected that accurate treatment can be performed on the lesion. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2013-543401 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in techniques for placing a marker using a catheter, the catheter is made of a flexible material so that it can move smoothly through curved body cavities such as the trachea, etc. Therefore, when pushing the marker out with a wire, if the engagement (holding force) of the marker to the catheter is too strong, the marker will not be pushed out and the catheter itself will stretch, and as a result, there is a risk that the marker will not be placed in the body.

[0007] The present invention has been made in light of the above circumstances, and an object of the present invention is to provide an indwelling device delivery apparatus that can easily place an indwelling device in the body. [Means for solving the problem]

[0008] Some aspects of the present disclosure include: (1) an indwelling device; A flexible first hollow shaft having a first lumen penetrating from the distal end to the proximal end and removably holding the placement device at the distal end of the first lumen; a second hollow shaft extending from a base end of the first hollow shaft toward the base end, penetrating from the tip to the base end and having a second lumen communicating with the first lumen; and an extrusion mechanism for extruding the indwelling device from the first hollow shaft toward a distal end direction through the first and second lumen, a tensile stiffness of the second hollow shaft greater than a tensile stiffness of the first hollow shaft; (2) The second hollow shaft includes a hollow shaft body having the second lumen, and a cylindrical reinforcing member covering an outer periphery of the hollow shaft body and having a tensile stiffness greater than that of the hollow shaft body, The indwelling device delivery device according to (1), wherein the reinforcing member is fixed to a base end portion of the first hollow shaft and / or a tip end portion of the hollow shaft body. (3) The second hollow shaft comprises a hollow shaft body having the second lumen, and linear or ribbon-shaped reinforcing members arranged in parallel along the longitudinal direction of the hollow shaft body, The indwelling device delivery apparatus according to (1), wherein the reinforcing member has a tensile stiffness greater than that of the hollow shaft body and is fixed to a base end portion of the first hollow shaft and / or a tip end portion of the hollow shaft body; and (4) A connecting member having a tensile stiffness greater than that of the hollow shaft body, the connecting member is fixed to the first hollow shaft and the hollow shaft body at a boundary between the first hollow shaft and the hollow shaft body, The indwelling device delivery apparatus according to (2) or (3) above, wherein the reinforcing member is fixed to the connecting member.

[0009] In this specification, "tensile stiffness" refers to the tensile modulus of elasticity as defined in JIS 7161-1 2014, and means stiffness in the longitudinal direction of the first and second hollow shafts. "Distal direction" refers to the direction along the longitudinal direction of the first and second hollow shafts, in which the first hollow shaft is located relative to the second hollow shaft. "Proximal direction" refers to the direction along the longitudinal direction of the first and second hollow shafts, opposite to the distal direction. Effect of the Invention

[0010] The present invention can provide an indwelling device delivery apparatus that can easily place an indwelling device in the body. [Brief description of the drawings]

[0011] [Figure 1] 1 is a schematic cross-sectional view showing an entirety of a first embodiment. [Figure 2A] 1 is a schematic cross-sectional view showing an enlarged view of a portion of a first embodiment. [Figure 2B] FIG. 2B is a schematic cross-sectional view taken along line IIb-IIb in FIG. 2A. [Figure 3A] FIG. 2 is a schematic diagram showing a state in which the first embodiment is used. [Figure 3B] FIG. 2 is a schematic diagram showing a state in which the first embodiment is used. [Figure 3C] FIG. 2 is a schematic diagram showing a state in which the first embodiment is used. [Figure 4A] FIG. 4 is a schematic cross-sectional view showing an enlarged view of a portion of the second embodiment. [Figure 4B] FIG. 4B is a schematic cross-sectional view taken along line IVb-IVb in FIG. 4A. [Diagram 5] FIG. 11 is a schematic cross-sectional view showing an enlarged view of a part of a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The placement device delivery apparatus of the present disclosure comprises an indwelling device, a flexible first hollow shaft having a first lumen penetrating from the tip to the base end and removably holding the placement device at the tip of the first lumen, a second hollow shaft extending from the base end of the first hollow shaft toward the base end and having a second lumen penetrating from the tip to the base end and communicating with the first lumen, and an extrusion mechanism that extrudes the placement device from the first hollow shaft toward the tip end via the first and second lumen, and the tensile stiffness of the second hollow shaft is configured to be greater than the tensile stiffness of the first hollow shaft.

[0013] In this specification, unless otherwise specified, the term "longitudinal direction" refers to the direction along the longitudinal axes of the first hollow shaft and the second hollow shaft.

[0014] Hereinafter, the first to third embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the embodiments shown in the drawings. The dimensions of the indwelling device delivery device shown in each drawing are shown to facilitate understanding of the implementation contents and do not correspond to the actual dimensions. In each drawing, the left side of the drawing indicates the tip direction (distal) of the indwelling device delivery device, and the right side indicates the base end direction (proximal, hand side) of the indwelling device delivery device.

[0015] [First embodiment] Fig. 1 is a schematic diagram showing a first embodiment. As shown in Fig. 1, the placement device delivery apparatus 1 is generally composed of a placement device 11, a first hollow shaft 21, a second hollow shaft 31, a connector 41, a pusher member 51, and a gripping member 61.

[0016] The placement device 11 is a device that is placed inside the body. The placement device 11 can be composed of, for example, a device main body 111 and an engagement member 112, as shown in FIG.

[0017] Examples of the device body 111 include a capsule containing a drug (not shown), a contrast marker containing a radiopaque material (not shown), and a marker in which an IC tag 111a that stores various information inside and communicates wirelessly with a device installed outside the body is covered with a covering member 111b (see FIG. 2A).

[0018] The material constituting the covering member 111b is preferably biocompatible because the placement device 11 is inserted into the body. Examples of the material include resin materials such as polyamide resin, polyolefin resin, polyester resin, polyurethane resin, silicone resin, and fluororesin; metal materials such as SUS304; and the like.

[0019] After the placement device 11 is detached (separated) from the first hollow shaft 21, the engagement member 112 engages with a body wall or the like to fix the placement device 11 inside the body. For example, the engagement member 112 may be a self-expandable coil-shaped member having one end joined to the device body 111 and the other end being a free end. Such an engagement member 112 is formed of a shape memory alloy such as Ni-Ti, and is held in the first lumen 21h in a pre-contracted state. When placing the placement device 11, after the placement device 11 is detached from the first hollow shaft 21, the engagement member 112 self-expands to engage with a body wall or the like, thereby fixing the device body 111 inside the body.

[0020] The first hollow shaft 21 has a first lumen 21h penetrating from the tip to the base end, and is a flexible member that detachably (separably) holds the placement device 11 at the tip of the first lumen 21h. Specifically, the first hollow shaft 21 can be formed of, for example, a long hollow cylinder.

[0021] The first hollow shaft 21 is formed of a material having flexibility. In addition, since the first hollow shaft 21 is inserted into a body cavity, it is preferable that the first hollow shaft 21 has biocompatibility. Examples of the material include resin materials such as polyamide resin, polyolefin resin, polyester resin, polyurethane resin, silicone resin, and fluororesin. Among these, fluororesin is preferable, and polytetrafluoroethylene (PTFE) resin is more preferable. This can improve the slidability of the pusher member 51 (described later) and the like inserted into the first inner cavity 21h.

[0022] The second hollow shaft 31 is a member extending in the proximal direction from the proximal end of the first hollow shaft 21. The tensile stiffness of the second hollow shaft 31 is formed to be greater than the tensile stiffness of the first hollow shaft 21.

[0023] The second hollow shaft 31 can be configured to have, for example, a hollow shaft body 311 and a reinforcing member 312, as shown in FIGS. 2A and 2B.

[0024] The hollow shaft body 311 has a second lumen 311h that penetrates from the tip to the base end and communicates with the first lumen 21h. In this embodiment, the inner diameter of the second lumen 311h is the same as the inner diameter of the first lumen 21h, and the inner circumferential surfaces that define the first lumen 21h and the second lumen 311h are provided so as to be continuous so that no step is generated at the boundary between these lumen. The above-mentioned first lumen 21h and second lumen 311h form a lumen L for inserting an extrusion mechanism such as a pusher member 51 described later.

[0025] The material from which the hollow shaft body 311 is formed is preferably flexible and biocompatible, since the hollow shaft body 311 is inserted into a body cavity. Examples of the material include resin materials such as polyamide resin, polyolefin resin, polyester resin, polyurethane resin, silicone resin, and fluororesin. Among these, fluororesin is preferable, and polytetrafluoroethylene (PTFE) resin is more preferable. This can improve the slidability of the pusher member 51 (described later) and the like inserted into the second lumen 311h.

[0026] The reinforcing member 312 is a cylindrical member that covers the outer periphery of the hollow shaft body 311 and has a tensile stiffness greater than that of the hollow shaft body 311. The reinforcing member 312 can be disposed, for example, so as to cover the entire outer periphery of the hollow shaft body 311 from the tip to the base end. The reinforcing member 312 may have the same outer diameter as the outer diameter of the first hollow shaft 21 so that it can be smoothly inserted into the body cavity without getting caught.

[0027] The material forming the reinforcing member 312 preferably has a tensile stiffness greater than that of the hollow shaft body 311 and is biocompatible because it is inserted into a body cavity. Examples of the material include polyimide resin and composite materials such as fibers reinforced only in the tensile direction. Among these, materials that have high tensile stiffness as well as flexibility and followability in the bending direction are more preferable.

[0028] The reinforcing member 312 can be fixed to the base end of the first hollow shaft and / or the tip end of the hollow shaft body. In this embodiment, the reinforcing member 312 is fixed to both the base end of the first hollow shaft 21 and the tip end of the hollow shaft body 311 at the fixing portion 31a.

[0029] Methods for fixing the reinforcing member 312 to the base end of the first hollow shaft 21 and the tip end of the hollow shaft main body 311 include, for example, bonding with a biocompatible adhesive, welding by heating, and embedding a part or all of the reinforcing member 312 in the first hollow shaft 21 and the hollow shaft main body 311.

[0030] The connector 41 is a member that operates a push-out mechanism described later. The connector 41 is provided with a lumen 41h that penetrates from the tip to the base end and communicates with the second lumen 311h. The connector 41 of this embodiment has an intermediate wall 41b having an opening 41a in the middle of the lumen 41h, and a spring member 41c that is interposed between the intermediate wall 41b and an abutment body 512 provided on the pusher member 51 and normally biases the abutment body 512 in the base end direction. In addition, a screw groove 41d that screws into a screw portion 511a of the pusher member 51 described later is provided in a portion of the connector 41 in the base end direction from the abutment body 512.

[0031] The pusher member 51 is a member constituting the extrusion mechanism. The extrusion mechanism is a mechanism that extrudes the placement device 11 from the first hollow shaft 21 toward the distal end through the first and second inner cavities 21h, 311h. As in this embodiment, the extrusion mechanism can be configured to have, for example, a longitudinal pusher member 51 that is inserted through the first and second inner cavities 21h, 311h and extrudes the placement device 11 while its distal end abuts against the proximal end of the placement device 11.

[0032] The pusher member 51 can be composed of, for example, a solid shaft 511 having a screw portion 511a formed thereon to be screwed into the screw groove 41d of the connector 41, and a contact body 512 fixed midway in the longitudinal direction of the shaft 511. In this case, the pusher member 51 slidably advances and retreats within the lumen L by a screw action during rotation caused by the screwing of the screw portion 511a with the screw groove 41d, and the tip of the shaft 511 can push the placement device 11 in the distal direction by pressing it while abutting against the base end of the placement device 11.

[0033] It is preferable that the material forming the pusher member 51 has a rigidity capable of pushing out the placement device 11 and is biocompatible. Examples of the material include metal materials such as stainless steel, Ni-Ti alloy, and cobalt chromium alloy.

[0034] In this way, since the extrusion mechanism has the pusher member 51, the placement device 11 can be pushed out with a simple configuration, and the placement device 11 can be placed in the body more reliably.

[0035] The gripping member 61 is a member that an operator operates while gripping the indwelling device delivery device 1. The gripping member 61 is fixed, for example, to the base end of the pusher member 51, and is provided so that the pusher member 51 rotates by rotating the handle 611. The shape of the gripping member 61 is not particularly limited as long as it does not impair the effects of the present invention, and can be formed, for example, into a shape that is easy for the operator to operate.

[0036] Next, a description will be given of a mode of use of the placement device delivery apparatus 1. Here, an example will be given of a procedure in which a placement device 11 including a device main body 111 in which an IC tag 111a serving as a marker is covered with a covering member 111b and a self-expandable engaging member 112 provided on the outer periphery of the base end of the device main body 111 is used to place the placement device 11 in the vicinity of a lesion occurring in a bronchus of a lung.

[0037] First, the placement device delivery apparatus 1 is prepared. Specifically, for example, the placement device 11 is inserted into the first lumen 21h from the distal end opening 21a of the first hollow shaft 21, and the engagement member 112 is engaged with the inner wall of the first lumen 21h to hold the placement device 11 at the distal end of the first hollow shaft 21. Next, the pusher member 51 is advanced while rotating the handle 611 of the gripping member 61, and the distal end of the shaft 511 is brought into contact with the base end of the device main body 111.

[0038] Next, the indwelling device delivery device 1 is inserted into the body. Specifically, for example, the prepared indwelling device delivery device 1 is inserted into the trachea via the oral cavity, and the tip of the indwelling device 11 is pushed forward until it reaches the vicinity of the lesion B in the bronchus A (see FIG. 3A). At this time, the first hollow shaft 21 is flexible, so it smoothly advances along the curved inner wall W of the bronchus A.

[0039] Next, the placement device 11 is pushed out from the first hollow shaft 21 in the distal direction to place the placement device 11 in the bronchus A. Specifically, the handle 611 is rotated to advance the pusher member 51 by the screw action of the screw part 511a, so that the tip of the shaft 511 presses the placement device 11 and pushes the placement device 11 out from the opening 21a in the distal direction (see FIG. 3B). At this time, the engagement member 112 of the pushed-out placement device 11 is released from the first lumen 21h, and expands by self-expansion, and the outer periphery of the engagement member 112 engages with the inner wall W of the bronchus A to fix the placement device 11 in the bronchus A. Next, the placement device delivery apparatus 1 from which the placement device 11 has been detached is removed from the bronchus A to complete the placement of the placement device 11 (see FIG. 3C).

[0040] Furthermore, during subsequent treatment (such as removal of the lesion), the position of the placement device 11 within the body is identified by wireless communication with the IC tag 111a using a wireless device (not shown) installed outside the body, and treatment can be performed on the lesion B located nearby using the position of the placement device 11 as a clue.

[0041] As described above, the indwelling device delivery device 1 has a flexible tip portion due to the above-mentioned configuration. Furthermore, the indwelling device delivery device 1 can prevent the second hollow shaft 31 from elongating due to the pressure of the pusher member 51 when the pusher member 51 (push-out mechanism) pushes out the indwelling device 11. As a result, the indwelling device delivery device 1 can smoothly push out the indwelling device 11 from the first hollow shaft 21, and can easily place the indwelling device 11 in the body.

[0042] Furthermore, in this embodiment, since the cylindrical reinforcing member 312 is provided, high tensile rigidity can be imparted to the second hollow shaft 31, and the second hollow shaft 31 does not succumb to the pressure of the pusher member 51, and the placement device 11 can be more easily pushed out into the body.

[0043] [Second embodiment] 4A and 4B are schematic diagrams showing the second embodiment. As shown in FIG. 4A, the indwelling device delivery device 2 is generally composed of an indwelling device 11, a first hollow shaft 21, a second hollow shaft 32, a connector 41 (not shown), a pusher member 51, and a gripping member 61 (not shown). The indwelling device delivery device 2 is different from the first embodiment in that it includes a second hollow shaft 32. Note that the configurations of the indwelling device 11, the first hollow shaft 21, the connector 41, the pusher member 51, and the gripping member 61 are the same as those of the first embodiment, so the same parts are given the same reference numerals and detailed description thereof is omitted. In addition, the configuration other than the configuration of the second hollow shaft 32 shown below and the usage mode of the indwelling device delivery device 2 are the same as those of the first embodiment.

[0044] The second hollow shaft 32 is a member extending in the proximal direction from the proximal end of the first hollow shaft 21. The tensile stiffness of the second hollow shaft 32 is formed to be greater than the tensile stiffness of the first hollow shaft 21.

[0045] The second hollow shaft 32 can be configured to have, for example, a hollow shaft body 321 and a reinforcing member 322.

[0046] The hollow shaft body 321 has a second lumen 321h that passes through from the distal end to the proximal end and communicates with the first lumen 21h.

[0047] The reinforcing member 322 is a linear or ribbon-shaped member arranged in parallel along the longitudinal direction of the hollow shaft body 321. The reinforcing member 322 has a tensile stiffness greater than that of the hollow shaft body 321. The linear and ribbon-shaped reinforcing members may be arranged, for example, in contact with the outer periphery of the hollow shaft body 321 and along the longitudinal direction. The reinforcing member 322 may include one wire or a plurality of wires or ribbons. In addition, wires and ribbons may be mixed. In this embodiment, the reinforcing member 322 is exemplified by two wires (linear reinforcing members 322) arranged to face each other across the longitudinal axis and embedded on the outer periphery of the hollow shaft body 321.

[0048] The above-mentioned linear or ribbon-like reinforcing members 322 may be arranged evenly around the long axis. For example, when two wires are used, they are preferably arranged so as to face each other across the long axis of the second hollow shaft, when three wires are used, they are preferably arranged at intervals of 120 degrees along the circumferential direction of the second hollow shaft, and when four wires are used, they are preferably arranged at intervals of 90 degrees along the circumferential direction of the second hollow shaft. This makes it possible to impart even rigidity around the long axis of the second hollow shaft, and to prevent the axis of the second hollow shaft from deflecting in a specific direction when pressed by the pusher member 51.

[0049] The reinforcing member 322 can be fixed to the base end of the first hollow shaft and / or the tip end of the hollow shaft body. In this embodiment, the reinforcing member 322 is fixed (embedded) over the entire length of the hollow shaft body 321 including the base end of the first hollow shaft 21 and the tip end of the hollow shaft body 321.

[0050] As described above, the indwelling device delivery device 2 has a flexible tip portion due to the above-mentioned configuration. Furthermore, when the pusher member 51 (extrusion mechanism) pushes out the indwelling device 11, the indwelling device delivery device 2 can suppress the second hollow shaft 32 from elongating due to the pressure of the pusher member 51. As a result, the indwelling device delivery device 2 can smoothly push out the indwelling device 11 from the first hollow shaft 21, and can easily place the indwelling device 11 in the body.

[0051] Furthermore, in this embodiment, since the second hollow shaft 32 is provided with a linear reinforcing member 322 (wire), high tensile rigidity can be imparted to the second hollow shaft 32, and the second hollow shaft 32 can easily push out the placement device 11 into the body without succumbing to the pressure of the pusher member 51.

[0052] [Third embodiment] FIG. 5 is a schematic diagram showing the third embodiment. As shown in FIG. 5, the indwelling device delivery device 3 is generally composed of an indwelling device 11, a first hollow shaft 23, a connection member 73, a second hollow shaft 33, a connector 41 (not shown), a pusher member 51, and a gripping member 61 (not shown). The indwelling device delivery device 3 is different from the first embodiment in that it includes the first hollow shaft 23, the connection member 73, and the second hollow shaft 33. Note that the configurations of the indwelling device 11, the connector 41, the pusher member 51, and the gripping member 61 are the same as those of the first embodiment, and the same parts are given the same reference numerals and detailed description thereof is omitted. In addition, the configurations of the first and second hollow shafts other than the configurations of the first and second hollow shafts 23 and 33 shown below, and the usage mode of the indwelling device delivery device 3 are the same as those of the first embodiment.

[0053] The first hollow shaft 23 has a first lumen 23h penetrating from the tip to the base end, and is a flexible member that detachably holds the placement device 11 at the tip of the first lumen 23h. The first hollow shaft 23 of this embodiment is provided at its base end with a connected portion 23a to which a connecting portion 73a of a connecting member 73 described later is connected.

[0054] The connecting member 73 is a member having a tensile stiffness greater than that of the hollow shaft body 331. The connecting member 73 is fixed to the first hollow shaft 23 and the hollow shaft body 331 at the boundary between the first hollow shaft 23 and the hollow shaft body 331. In this embodiment, a connecting portion 73a provided at the tip end of the connecting member 73 is connected to fit into the connected portion 23a, and a connecting portion 73b provided at the base end of the connecting member 73 is connected to fit into the connected portion 331b described below (the first hollow shaft 23 and the hollow shaft body 331 are arranged to be spaced apart with the connecting member 73 sandwiched therebetween).

[0055] The connection member 73 of this embodiment is configured as a hollow cylindrical member having a lumen 73h that penetrates from the tip to the base end and communicates with the first and second lumen 23h, 331h. The hollow cylindrical member may be provided so that the inner diameter of the lumen 73h is the same as the inner diameter of the first and second lumen 23h, 331h, and these lumen are continuous (there is no step at the boundary between the lumen). This allows the pusher member 51 to move forward and backward smoothly. In addition, the outer diameter of the connection member 73 and the outer diameter of the first and second hollow shafts 23, 33 may be the same, and these outer peripheral surfaces may be continuous (there is no step at the boundary between the outer peripheral surfaces). This allows the placement device delivery apparatus 3 to move forward smoothly without getting caught on the inner wall of the body cavity.

[0056] The material forming the connection member 73 is preferably biocompatible since it is inserted into a body cavity. Examples of the material include super engineering plastics such as PEEK (polyether ether ketone) and PSU (polysulfone), composite materials such as graphite fiber, and metal materials such as SUS304. Among these, super engineering plastics such as PEEK (polyether ether ketone) and PSU (polysulfone), which can be injection molded and have excellent rigidity and strength, and composite materials such as graphite fiber are more preferable.

[0057] The method of connecting the connecting part 73a and the connected part 23a, and the method of connecting the connecting part 73b and the connected part 331b are not particularly limited as long as they do not impair the effects of the present invention (for example, the first hollow shaft 23 and the second hollow shaft 33 do not extend in the long axis direction, and the long axis of the first hollow shaft 23 and the long axis of the second hollow shaft 33 do not shift). Examples of the above connection method include a method in which the first and second hollow shafts 23, 33 and the connection member 73 are fitted, bonded, or welded together.

[0058] The second hollow shaft 33 is a member that extends from the base end of the first hollow shaft 23 toward the base end, penetrates from the tip to the base end, and has a second lumen 331h that communicates with the first lumen 23h. The tensile stiffness of the second hollow shaft 33 is formed to be greater than the tensile stiffness of the first hollow shaft 23.

[0059] The second hollow shaft 33 of the present embodiment is composed of a hollow shaft body 331 and a reinforcing member 332. A connected portion 331b to which the connecting portion 73b of the connecting member 73 described above is connected is provided at the tip end of the hollow shaft body 331. The tip end of the reinforcing member 332 is fixed to the base end of the first hollow shaft 23 and the tip end of the hollow shaft body 331 together with the connecting member 73 at the fixing portion 33a.

[0060] As described above, since the indwelling device delivery apparatus 3 has the above-mentioned configuration, the first hollow shaft 23 and the second hollow shaft 33 are connected via the connection member 73 having high tensile stiffness, and therefore, when the pusher member 51 (extrusion mechanism) pushes out the indwelling device 11, the second hollow shaft 33 can be prevented from elongating due to the pressure of the pusher member 51. As a result, the indwelling device delivery apparatus 3 can smoothly push out the indwelling device 11 from the first hollow shaft 23, and the indwelling device 11 can be easily placed in the body.

[0061] The present disclosure is not limited to the configurations of the above-described embodiments, but is intended to include all modifications within the scope of the claims and meaning equivalent to the scope of the claims. A part of the configurations of the above-described embodiments may be deleted or replaced with another configuration, or another configuration may be added to the configurations of the above-described embodiments.

[0062] For example, in the above-described embodiment, the placement device delivery devices 1 and 3 having cylindrical reinforcing members 312 and 332 and the placement device delivery device 2 having a linear reinforcing member 322 are exemplified as specific means for making the tensile stiffness of the second hollow shafts 31, 32, and 33 greater than the tensile stiffness of the first hollow shafts 21 and 23. However, as long as the effect of the present invention is not impaired, any embodiment may be used as long as the tensile stiffness of the second hollow shaft is greater than the tensile stiffness of the first hollow shaft.

[0063] In the above-described embodiment, the placement device 11 is described that includes the device body 111 having the IC tag 111a and the self-expandable engaging member 112. However, the subject to be placed may be, for example, a placement device that does not include an engaging member, a capsule containing a drug, a contrast marker containing a radiopaque material, a cell, an electronic device, or other placement object.

[0064] In the above-mentioned embodiment, the indwelling device delivery devices 1, 2, and 3 in which the reinforcing member 312, 322, and 332 are fixed to both the base end of the first hollow shaft 21, 23 and the tip end of the hollow shaft main body 311, 321, and 331 have been described. However, the indwelling device delivery device only needs to have a tensile stiffness of the second hollow shaft greater than the tensile stiffness of the first hollow shaft. That is, in an indwelling device delivery device having a reinforcing member, the reinforcing member only needs to be fixed to at least one of the base end of the first hollow shaft, the tip end of the hollow shaft main body, and the connecting member.

[0065] In the above-mentioned embodiment, the pushing mechanism is described in which the shaft 511 is advanced by the screw action due to the screwing of the screw portion 511a and the screw groove 41d to push out the placement device 11. However, the pushing mechanism may be in any form as long as the effect of the present invention is not impaired. For example, the pushing mechanism may be a shaft that does not have the above-mentioned screw portion and screw groove and linearly advances and retreats along the longitudinal direction without rotating the shaft. In addition, the pushing mechanism may be a mechanism that does not have the above-mentioned shaft and that pushes out the placement device toward the distal end by injecting a fluid such as an inert gas or physiological saline into a lumen formed airtight or liquidtight while applying pressure.

[0066] In the above-described embodiment, the indwelling device delivery device 3 is described in which the first hollow shaft 23 and the hollow shaft main body 331 are arranged to be separated from each other with the connecting member 73 sandwiched therebetween. However, the indwelling device delivery device may be one in which the first hollow shaft and the hollow shaft main body are in direct contact with each other. In such a case, the connecting member can be arranged, for example, so as to cover the outer periphery of the boundary between the first hollow shaft and the hollow shaft main body. [Explanation of symbols]

[0067] 1,2,3 Indwelling device delivery device 11 Indwelling Devices 21,23 First hollow shaft 21h, 23h First lumen 31, 32, 33 Second hollow shaft 311, 321, 331 Hollow shaft body 311h, 321h, 331h Second Lumen 312,322,332 Reinforcing members 51 Pusher member (extrusion mechanism) 73 Connection parts

Claims

1. A placement device; A flexible first hollow shaft having a first lumen penetrating from a distal end to a proximal end and removably holding the placement device at a distal end of the first lumen; a second hollow shaft extending from a base end of the first hollow shaft toward a base end direction, passing through from a tip end to a base end and having a second lumen communicating with the first lumen; and an extrusion mechanism for extruding the indwelling device from the first hollow shaft toward a distal end direction through the first and second lumen, The tensile stiffness of the second hollow shaft is greater than the tensile stiffness of the first hollow shaft; the second hollow shaft includes a hollow shaft body having the second lumen, and a cylindrical reinforcing member covering an outer periphery of the hollow shaft body and having a tensile stiffness greater than that of the hollow shaft body, An indwelling device delivery apparatus, wherein the reinforcing member is fixed to the base end of the first hollow shaft and / or the tip end of the hollow shaft body.

2. A placement device, A flexible first hollow shaft having a first lumen penetrating from a distal end to a proximal end and detachably holding the placement device at a distal end of the first lumen; a second hollow shaft extending from a base end of the first hollow shaft toward a base end direction, passing through from a tip end to a base end, and having a second lumen communicating with the first lumen; and an extrusion mechanism for extruding the indwelling device from the first hollow shaft toward a distal end direction through the first and second inner cavities, The tensile stiffness of the second hollow shaft is greater than the tensile stiffness of the first hollow shaft; the second hollow shaft comprises a hollow shaft body having the second lumen, and linear or ribbon-shaped reinforcing members arranged in parallel along a longitudinal direction of the hollow shaft body, An indwelling device delivery apparatus, wherein the reinforcing member has a tensile stiffness greater than the tensile stiffness of the hollow shaft body and is fixed to the base end of the first hollow shaft and / or the tip end of the hollow shaft body.

3. a connecting member having a tensile stiffness greater than the tensile stiffness of the hollow shaft body; the connecting member is fixed to the first hollow shaft and the hollow shaft body at a boundary between the first hollow shaft and the hollow shaft body, The indwelling device delivery apparatus according to claim 1 or 2, wherein the reinforcing member is fixed to the connecting member.

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