Medical jig and transfer equipment

Abstract

To store a medical sheet in an external cylinder efficiently in transfer equipment having an external cylinder for transferring a medical sheet (cell sheet) used for organ transplantation to a treatment object part of a living body.SOLUTION: A medical jig 94 includes: a jig body 941 that can be attached to or detached from an outer peripheral surface 22A of an external cylinder 22 in transfer equipment 10; a guide part 942 extending in a tip direction from the tip of the jig body 941 and having an internal space 943 into which a first carrier member is taken; and a partition wall part 945 protruding from an inner peripheral surface of the guide part 942 toward the internal space 943. When causing a first support part 26 and the medical jig 94 to be relatively moved so that the first support part 26 of the transfer equipment 10 is moved relatively in a base end direction with respect to the medical jig 94, the guide part 942 and the partition wall part 945 guide the first support part 26 in the internal space 943, and deform the first support part 26 into a curved shape so that the two sides in a width direction of the first support part 26 protrude toward a first support surface 261.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a medical tool and a transfer device used in a transfer device for transferring a medical sheet to a treatment target part of a living body. [Background technology]

[0002] Patent Document 1 discloses, for example, a transfer device for transferring a medical sheet (cell sheet) used in organ transplantation to a treatment target part of a living body. This transfer device comprises an outer tube, a shaft movable inside the outer tube, and a support part provided at the tip of the shaft and capable of protruding from the tip of the outer tube. The support part has a sheet support for placing the medical sheet. With the transfer device, with the medical sheet placed on the support surface of the sheet support, the shaft is slid relative to the outer tube, thereby drawing the medical sheet together with the sheet support into the outer tube and storing it within the outer tube. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2022 / 080459 Summary of the Invention [Problem to be solved by the invention]

[0004] It is desirable to efficiently contain the medical sheet within the barrel. [Means for solving the problem]

[0005] (1) A first aspect of the present invention is a medical tool used in a transfer instrument for transferring a medical sheet to a treatment target part of a living body, the transfer instrument comprising: an outer tube having a tip opening; a cylindrical shaft extending in the axial direction of the outer tube and disposed inside the outer tube so as to be movable along the axial direction; and a carrier member having a sheet-shaped support part disposed at the tip of the shaft, the support part including a support surface capable of holding the medical sheet, the width of the support part in a direction perpendicular to the extension direction of the shaft being greater than an inner peripheral length of the outer tube, the support part being contained within the outer tube in a curved and deformed state at a first position where the shaft is moved in a base end direction relative to the outer tube so that the support part is contained within the outer tube, and at a second position where the shaft is moved in a tip direction relative to the outer tube so that the support part protrudes from the tip opening of the outer tube, the support part is exposed in the tip direction from the outer tube and unfolds, and the medical tool comprises a carrier member having a support surface that can hold the medical sheet, the width of the support part in a direction perpendicular to the extension direction of the shaft is greater than an inner peripheral length of the outer tube, the support part is contained within the outer tube in a curved and deformed state, and a guide portion extending from a tip of the jig body in the tip direction and having an internal space into which the carrier member is taken, and a partition portion protruding from the inner peripheral surface of the guide portion toward the internal space, wherein when the medical jig is attached to the outer periphery of the outer tube, the internal space of the guide portion is arranged to face the tip opening of the outer tube, the support portion of the transfer instrument protrudes in the tip direction from the tip of the outer tube, and when the support portion and the medical jig are moved relative to each other from a position where the tip opening of the outer tube and the internal space of the guide portion face each other with the medical sheet placed on the support portion, the guide portion and the partition portion guide the support portion within the internal space, and deform the support portion into a curved shape so that both sides in the width direction of the support portion protrude toward the support surface.

[0006] According to this medical tool, the medical tool is attached to the outer periphery of the outer cylinder, and the support part and the medical tool are moved relative to each other in the axial direction, so that the guide part and the partition part of the medical tool can deform the support part into a predetermined curved shape. Therefore, the medical tool can effectively accommodate the support part having a width larger than the inner periphery length of the outer cylinder inside the outer cylinder.

[0007] (2) In the medical tool described in (1) above, the medical tool may be a tubular body formed in a ring shape along the axial direction, and the partition portion may be formed from an elastically deformable material.

[0008] With this configuration, when the medical jig is attached to the outer periphery of the outer cylinder, the medical jig can be easily slid in the axial direction of the outer cylinder, and the medical jig can be slid toward the distal end to effectively incorporate the support part and form a curved shape. When the medical jig and the outer cylinder are moved relative to each other in the axial direction, the partition part comes into contact with the outer periphery of the outer cylinder and elastically deforms, so that the partition part does not hinder the advancement of the medical jig toward the distal end, and further, when the partition part moves toward the distal end from the distal opening of the outer cylinder, the elasticity of the partition part makes it possible to protrude radially inward of the outer cylinder.

[0009] (3) In the medical tool described in (1) or (2) above, the tool body may be provided with a rotation regulating portion that engages with the outer periphery of the outer tube, is supported movably along the axial direction relative to the outer tube, and regulates rotation relative to the outer tube.

[0010] With this configuration, the rotation regulating section allows the medical tool to move in a straight line toward the tip relative to the outer tube while preventing relative rotation, so that the partition section can be effectively positioned in the widthwise center of the support section from the tip of the outer tube in the tip direction, and the partition section can be used to smoothly fold the medical sheet into a specified curved shape.

[0011] (4) In the medical device described in (1) above, the medical device may have an opening that opens in a direction perpendicular to the axial direction, the opening may be formed over the entire length in the axial direction, and the opening direction of the opening may be perpendicular to the axial direction of the outer tube.

[0012] With this configuration, the medical tool can be attached to the outer periphery of the outer cylinder from the radially outside of the outer cylinder, making it easy to attach and detach the medical tool to and from the outer cylinder.

[0013] (5) In the medical tool according to any one of (1) to (4) above, the guide portion may have a flared portion that expands in diameter from the tool body toward the tip.

[0014] With this configuration, the flared portion allows the support portion to be smoothly introduced into the internal space from the tip of the guide portion and gradually deformed into a curved shape.

[0015] (6) In the medical tool according to any one of (1) to (5) above, the partition may be formed along the axial direction.

[0016] With this configuration, when the support portion and the medical tool are moved relative to each other in the axial direction, the partition portion can deform the support portion into a curved shape over a wide range in the axial direction.

[0017] (7) A second aspect of the present invention is a transfer instrument comprising an instrument body for transferring a medical sheet to a treatment target part of a living body, and a medical tool detachable from the instrument body, wherein the instrument body comprises an outer tube having a tip opening, a cylindrical shaft extending in the axial direction of the outer tube and disposed inside the outer tube so as to be movable along the axial direction, and a sheet-like support part disposed at the tip of the shaft, the support part including a support surface capable of holding the medical sheet, and the support part extending in a direction perpendicular to the extension direction of the shaft. a width of the support part is greater than an inner peripheral length of the outer tube, and at a first position where the shaft is moved in a proximal direction relative to the outer tube so that the support part is contained within the outer tube, the support part is contained within the outer tube in a curved and deformed state, and at a second position where the shaft is moved in a distal direction relative to the outer tube so that the support part protrudes from a distal opening of the outer tube, the support part is exposed in the distal direction from the outer tube and unfolds, and the medical tool is a transfer instrument having the medical tool described in any one of (1) to (6). It is.

[0018] According to this transfer device, the medical jig is attached to the outer tube, and the support part and the medical jig are moved relative to each other in the axial direction, so that the guide part and the partition part of the medical jig can deform the support part into a predetermined curved shape. Therefore, the medical jig can effectively accommodate the support part, which has a width larger than the inner peripheral length of the outer tube, inside the outer tube. Effect of the Invention

[0019] According to the present invention, the medical jig includes a jig body detachable from the outer periphery of the outer tube of the transfer device, a guide portion extending from the tip of the jig body toward the tip and having an internal space into which the carrier member is taken, and a partition portion protruding from the inner periphery of the guide portion toward the internal space, so that by attaching the medical jig to the outer periphery of the outer tube and moving the support portion and the medical jig relative to each other in the axial direction, the guide portion and the partition portion of the medical jig can deform the support portion into a predetermined curved shape. This makes it possible for the medical jig to effectively accommodate the support portion having a width greater than the inner periphery length of the outer tube within the outer tube. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view of a delivery device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of the delivery device of FIG. [Diagram 3] FIG. 3 is a plan view of the tip of the delivery device of FIG. [Figure 4] FIG. 4 is a vertical cross-sectional view taken along line IV-IV in FIG. [Diagram 5] FIG. 5 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 6 is a perspective view showing a state in which a medical tool is attached to the transportation device of FIG. [Figure 7] Fig. 7A is a perspective view of the medical jig shown in Fig. 6. Fig. 7B is a front view of the medical jig as viewed from the guide portion side shown in Fig. 7A. [Figure 8] FIG. 8 is a flow chart showing the steps of a method for transferring a medical sheet using the transfer device of FIG. [Figure 9] FIG. 9 is a first explanatory view of the sheet placing step. [Figure 10] FIG. 10 is a second explanatory view of the sheet placing step. [Figure 11] FIG. 11 is a first explanatory view of the accommodation step. [Figure 12] FIG. 12 is a second explanatory view of the accommodation step. [Figure 13]FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. [Figure 14] FIG. 14 is a third explanatory view of the accommodation step. [Figure 15] FIG. 15 is a fourth explanatory view of the accommodation step. [Figure 16] FIG. 16 is a cross-sectional view taken along line XVI-XVI in FIG. [Figure 17] FIG. 17 is an explanatory diagram of the arrangement process. [Figure 18] FIG. 18 is an explanatory diagram of the development process. [Figure 19] FIG. 19 is an explanatory diagram of the movement process. [Figure 20] FIG. 20 is an explanatory diagram of the removal step. [Figure 21] FIG. 21 is a perspective view showing a state in which a medical tool according to a modified example is attached to a transportation tool. [Figure 22] FIG. 22 is a front view of the medical jig shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] As shown in Fig. 1, the transfer device 10 according to this embodiment is a medical device for transferring a medical sheet 300 to a treatment target part of a living body. The transfer device 10 is used, for example, in the treatment of severe heart failure caused by ischemic heart disease. In this case, the medical sheet 300 is transplanted to a transplant target part 402 of a heart 400 (a treatment target part of a living body) (see Figs. 17 to 20). The transfer device 10 can attach multiple medical sheets 300 to the transplant target part 402.

[0022] Such medical sheet 300 includes pharmaceuticals for medical use, regenerative medicine products, medical devices, etc. The medical sheet 300 is formed in a sheet shape such as a film or membrane (gel-like substance). The medical sheet 300 may be reinforced by applying fibrin or the like. Regenerative medicine products containing cells include, for example, cell sheets (sheet-shaped cell cultures), spheroids, etc. The cell sheet can be formed by culturing autologous cells or allogeneic cells. The cells constituting the cell sheet include, for example, somatic stem cells (adult stem cells), mesenchymal stem cells, or cardiomyocytes derived from iPS cells (induced pluripotent stem cells). The somatic stem cells preferably include skeletal myoblasts (myoblast cells).

[0023] The medical sheet 300 may contain a tissue adhesive, a local anesthetic, etc. The thickness of the medical sheet 300 is, for example, about 100 μm, and the diameter of the medical sheet 300 is, for example, about 60 mm. However, the thickness and diameter (size) of the medical sheet 300 can be set appropriately.

[0024] The medical sheet 300 may be a sheet to be transplanted into an organ (such as the lung, liver, pancreas, kidney, small intestine, or esophagus) other than the heart 400. Furthermore, the medical sheet 300 may be a sheet for preventing adhesions, for example, so long as it is for medical use.

[0025] 1 and 2, the transportation instrument 10 includes an instrument body 12, an endoscope 14, and a fixing member 16. The instrument body 12 includes a first carrier member 18, a second carrier member 20, and an outer cylinder 22. Note that the transportation instrument 10 is not limited to including the endoscope 14.

[0026] In FIG. 2, the first carrier member 18 includes a first shaft 24 and a first support 26 .

[0027] The first shaft 24 is a tubular body (a circular tube member in this embodiment) having a first lumen 28. The first lumen 28 opens at the tip (the end in the direction of the arrow X1) of the first shaft 24 and at the base end (the end in the direction of the arrow X2) of the first shaft 24. An airtight valve body 55 that is in close contact with the outer circumferential surface of the second shaft 48 is provided at the base end of the first shaft 24. A marker 551 is provided on the outer circumferential surface of the valve body 55. When using the transfer device 10, the user can see the marker 551. Note that the first shaft 24 is not limited to a tubular body, and may not be a tubular body.

[0028] The first shaft 24 extends in the axial direction of the outer cylinder 22 and is disposed inside the outer cylinder 22 so as to be movable along the axial direction. The first shaft 24 is made of, for example, a resin material. The constituent material of the first shaft 24 is not particularly limited, but examples thereof include polyethylene, polypropylene, fluororesin, polyethylene terephthalate, polymethyl methacrylate, polyamide resin, polystyrene, polycarbonate, polyimide, polyetherimide, polyether ether ketone, polyvinyl chloride, ABS resin, polyamide elastomer, and polyester elastomer. The first shaft 24 may be made of a metal material.

[0029] The first shaft 24 may be flexible. The first shaft 24 may have a flexible tube portion capable of retaining a bent shape. In this case, the first shaft 24 can be bent into an appropriate shape within the body cavity and can retain the bent shape.

[0030] As shown in Figs. 2 to 4, the first support part 26 is attached to the tip part of the first shaft 24. The first support part 26 is made of, for example, a resin material. The first support part 26 is capable of holding a medical sheet 300. The first support part 26 is formed by folding a flexible resin sheet material (film material) into a predetermined shape. The first support part 26 is formed, for example, by forming the sheet material into a predetermined shape using a sheet forming die. The thickness of the sheet material is not particularly limited, but is preferably set to, for example, 100 µm or more and 200 µm or less. The first support part 26 has a first joint part 30 and a first support body 32.

[0031] The constituent material of the first support section 26 is not particularly limited, but is preferably transparent, and examples of the constituent material include polyethylene, polycarbonate, polyamide, polystyrene, polypropylene, polyacetal resin, polyimide, polyetherimide, polyether ether ketone, polyethylene terephthalate, fluororesin, etc. The first support section 26 may be in a mesh shape.

[0032] In Fig. 4, the first joint part 30 is bonded to the inner circumferential surface of the tip part of the first shaft 24 by an adhesive. The adhesive is not particularly limited, but examples thereof include a UV adhesive, a hot melt adhesive, and an instant adhesive (e.g., a cyanoacrylate instant adhesive). The first joint part 30 may be heat fused to the inner circumferential surface of the first shaft 24. The first support part 26 may be detachable from the tip part of the first shaft 24.

[0033] As shown in FIG. 2, the first support body 32 extends from the first joint portion 30 in the distal direction. The first support body 32 has a base end support portion 34, an intermediate support portion 36, a pair of first protrusions 38, a pair of second protrusions 40, and a distal support portion 42. The first support body 32 has a first support surface 261. The marker 551 is arranged so that the marker 551 of the first shaft 24 faces upward when the first support surface 261 faces upward. That is, the marker 551 allows the user to confirm the direction of the first support surface 261 in the first support portion 26.

[0034] 3, the base end support part 34 is formed to be wider in the extension direction. In other words, both sides in the width direction of the base end support part 34 are tapered toward the first joint part 30. The intermediate support part 36 is formed to be tapered so that the width gradually decreases from the tip toward the base end (arrow X2 direction).

[0035] The tip support portion 42 is connected to the tip of the intermediate support portion 36 and the tips of the pair of second protrusions 40. The tip support portion 42 protrudes in an arc shape toward the tip direction (arrow X1 direction). That is, when viewed from a direction perpendicular to the first support surface 261 shown in FIG. 3, the tip support portion 42 of the first support portion 26 is in the shape of an arc connecting the pair of second protrusions 40.

[0036] 4, the base end support portion 34 extends from the tip of the first joint portion 30 toward the tip direction (arrow X1 direction) so as to generally follow the axis Ax of the first shaft 24. The intermediate support portion 36 extends from the tip of the base end support portion 34 toward the tip direction (arrow X1 direction) to intersect with the axis Ax of the first shaft 24 and toward the tip direction of the first support portion 26 (arrow X1 direction).

[0037] 2 and 3, the pair of first protrusions 38 protrude upward (in the direction of arrow Y) and inward in the width direction of the intermediate support part 36 from both sides in the width direction of the intermediate support part 36 perpendicular to the moving direction of the first shaft 24. The pair of first protrusions 38 are connected to the base end support part 34. The first protrusions 38 are arc-shaped and bulge outward in a convex manner in a direction away from the first support surface 261.

[0038] 3, the pair of second protrusions 40 are respectively connected to the tips of the pair of first protrusions 38. The pair of second protrusions 40 protrude upward and outward in the width direction from both sides of the intermediate support part 36. The second protrusions 40 are formed with a smaller curvature than the first protrusions 38. The second protrusions 40 protrude lower from the first support surface 261 than the first protrusions 38.

[0039] As shown in FIG. 3, hereinafter, the combined portion of the first protrusion 38 and the second protrusion 40 of the first support portion 26 is referred to as the "protrusion 37". Therefore, a pair of protrusions 37 is provided on both sides of the width direction of the first support portion 26. In FIG. 3, the direction perpendicular to the axial direction of the first shaft 24 (W direction) is the width direction of the first support portion 26. The W direction is also the width direction of other components (such as the outer tube 22). In this embodiment, the first support portion 26 has a pair of protrusions 37, and W1 in FIG. 3 is the width of the portion where the width of the first support portion 26 is maximum when the first support portion 26 is developed in a planar state. That is, the width W1 of the first support portion 26 is the maximum width of the first support portion 26P in a planar state before the pair of protrusions 37 are formed (before bending). The width W1 of the first support portion 26 is greater than the inner circumferential length L of the outer tube 22 (see FIG. 16). 16, the inner peripheral length L of the outer cylinder 22 is the length of the inner peripheral surface along the circumferential direction of the outer cylinder 22 (L=2πR). R is the radius of the inner cavity 78 of the outer cylinder 22.

[0040] Each of the pair of first protruding portions 38 has a pair of bent portions 444. Each of the pair of bent portions 444 bends the pair of first protruding portions 38 toward the first supporting surface 261 (middle supporting portion 36) of the first supporting portion 26 (see FIG. 5).

[0041] The first support body 32 has a front surface 461 that faces upward (in the direction of arrow Y) and includes the first support surface 261, and a back surface 462 that is the opposite surface to the front surface 461. The first support surface 261 is a flat surface that is continuous with the upper surface of the base end support part 34, the intermediate support part 36, and the upper surfaces of the tip support part 42. A lubricant may be applied to the first support surface 261 so that a second support part 50 of the second carrier member 20, which will be described later, can slide smoothly on the first support surface 261.

[0042] As shown in FIG. 2, the second carrier member 20 includes a second shaft 48 , a second support portion 50 , and a hub 52 .

[0043] The second shaft 48 is a tubular body (a circular tube member in this embodiment) having a second lumen 57. The length of the second shaft 48 along the axial direction is longer than the length of the first shaft 24 along the axial direction. The second shaft 48 is inserted into the first lumen 28 of the first shaft 24 (see Figs. 1 and 4). In other words, the distal end of the second shaft 48 protrudes in the distal direction (arrow X1 direction) from the distal end opening of the first shaft 24. The proximal end of the second shaft 48 protrudes in the proximal direction (arrow X2 direction) from the proximal end opening of the first shaft 24 (see Fig. 1). The second shaft 48 extends along the first shaft 24 and is provided movably along the first shaft 24. The second shaft 48 is not limited to a tubular body and may not be a tubular body.

[0044] The second shaft 48 is configured so as to be able to follow the shape of the first support portion 26. As the constituent material of the second shaft 48, for example, a material that is more flexible than the constituent material of the first shaft 24 is selected. Specifically, as the constituent material of the second shaft 48, for example, polyamide elastomer, polyester elastomer, polyurethane elastomer, polyvinyl chloride, polybutadiene, silicone rubber, metal coil (including composite with resin), etc. can be mentioned. The second shaft 48 is flexible.

[0045] 4, the second shaft 48 has a carrier holding portion 54 and a pressing portion 56 formed by the tip portion of the second shaft 48. The pressing portion 56 is formed from an elastic body such as an elastomer material. The pressing portion 56 presses the first support portion 26 against the inner surface of the outer tube 22 in a state in which the first support portion 26 is housed inside the outer tube 22.

[0046] The tip of the carrier holding part 54 has a pressing surface 58. The carrier holding part 54 is capable of pressing the outer peripheral end surface of the medical sheet 300 supported by the first support part 26 in the tip direction (arrow X1 direction) with the pressing surface 58. In this embodiment, the pressing part 56 is provided with the carrier holding part 54 that supports the second support part 50. The carrier holding part 54 has a pressing surface 58 and an attachment hole 60.

[0047] In Fig. 4, the pressing surface 58 is provided on the tip surface of the carrier holding part 54. An attachment hole 60 opens in the pressing surface 58. The second support part 50 is attached to the pressing surface 58. The pressing surface 58 presses the outer peripheral end surface of the medical sheet 300 in the tip direction (the direction of the arrow X1) (see Fig. 19).

[0048] 2 to 4, the second support part 50 is configured in a flexible sheet shape. The second support part 50 has a second joint part 70 and a second support body 72. The second joint part 70 is provided at the base end of the second support part 50. The second joint part 70 is provided at the base end of the second support body 72. The second joint part 70 is inserted into the mounting hole 60 of the carrier holding part 54 and is, for example, bonded. The second joint part 70 may be bonded to the mounting hole 60 of the carrier holding part 54 by an appropriate bonding method other than bonding. Furthermore, the second support part 50 may be molded integrally with the carrier holding part 54.

[0049] The second support body 72 extends from the second joint 70 in the tip direction (the direction of arrow X1). The length of the second support body 72 in the extending direction from the second joint 70 is shorter than the length of the first support body 32 in the extending direction from the first joint 30. A second support surface 74 for placing the medical sheet 300 on is provided on the upper surface of the second support body 72. The second support surface 74 is a flat surface. The second support body 72 is smaller than the first support body 32. In other words, the area of ​​the second support surface 74 is smaller than the area of ​​the first support surface 261.

[0050] In FIG. 2, the hub 52 is attached to the proximal end of the second shaft 48 .

[0051] 1 and 2, the outer cylinder 22 is a cylindrical member having a lumen 78. The lumen 78 has a distal end opening 80 that opens at the distal end (end in the direction of arrow X1) of the outer cylinder 22. The lumen 78 opens at the proximal end (end in the direction of arrow X2) of the outer cylinder 22. The outer cylinder 22 is flexible. Examples of materials constituting the outer cylinder 22 include the same materials as those constituting the first shaft 24 described above.

[0052] The first shaft 24 is inserted into the inner cavity 78 of the outer cylinder 22. The length along the axial direction of the outer cylinder 22 is shorter than the length along the axial direction of the first shaft 24. An airtight valve body 84 that comes into close contact with the outer circumferential surface of the first shaft 24 is provided at the base end of the outer cylinder 22.

[0053] 2 and 4, the tip surface of the outer cylinder 22 extends along a direction perpendicular to the axial direction of the outer cylinder 22. In FIG.

[0054] As shown in Fig. 2, the endoscope 14 has a long endoscope body 86. The tip of the endoscope body 86 is fixed to the outer peripheral surface of the outer tube 22 by a fixing member 16 (see Fig. 1). An objective lens 88 provided on the tip surface of the endoscope body 86 faces the tip direction of the outer tube 22 (the direction of the arrow X1). The tip of the endoscope body 86 is fixed to a middle part of the outer tube 22 in the axial direction. However, the tip of the endoscope body 86 may be fixed to the tip of the outer tube 22.

[0055] The fixing member 16 includes, for example, a fixed cylinder 90 and a fixed tube 92. The fixed cylinder 90 is made of, for example, a hard resin material. The endoscope main body 86 can be inserted into the inner cavity of the fixed cylinder 90. The fixed cylinder 90 is arranged along the longitudinal direction of the outer cylinder 22. The fixed tube 92 is a tube for fixing the fixed cylinder 90 to a predetermined position of the outer cylinder 22. The fixed tube 92 is, for example, a heat shrink tube. The method of fixing the tip portion of the endoscope main body 86 to the outer cylinder 22 can be set appropriately.

[0056] As shown in FIG. 6, the transfer device 10 further includes a medical jig 94. The medical jig 94 is detachably attached to the outside of the outer tube 22. The medical jig 94 is used when the first support part 26 holding the medical sheet 300 is housed inside the outer tube 22. The medical jig 94 is movably attached in the axial direction (arrows X1 and X2 directions) along the outer periphery 22A of the outer tube 22. Note that the medical jig 94 is not limited to being detachably disposed on the outer periphery 22A of the outer tube 22. The medical jig 94 may be movably attached to the outer periphery 22A of the outer tube 22 in advance.

[0057] The medical jig 94 is, for example, a tubular body formed from a resin material and formed in a ring shape along the axial direction of the medical jig 94. The medical jig 94 includes a jig body 941, a guide portion 942, and a partition portion 945. The jig body 941 is cylindrical and has a jig cavity 941A. The jig cavity 941A opens at the tip and base ends of the jig body 941. The jig body 941 is provided on the outer periphery 22A of the outer tube 22. The jig body 941 is provided radially outward from the outer periphery 22A of the outer tube 22. That is, the jig cavity 941A of the jig body 941 is formed to have a size that allows the outer tube 22 to be inserted therethrough. The axial length of the jig body 941 is shorter than the axial length of the outer tube 22.

[0058] The jig body 941 is detachably provided on the outer periphery 22A of the outer tube 22. The jig body 941 has a rotation restricting portion 946. The rotation restricting portion 946 engages with the outer periphery 22A of the outer tube 22, is supported movably along the axial direction relative to the outer tube 22, and restricts the rotation relative to the outer tube 22. As shown in FIG. 7A, the rotation restricting portion 946 has a protrusion 947. The protrusion 947 protrudes radially inward from the inner periphery of the jig body 941. When the medical jig 94 is attached to the outer periphery 22A of the outer tube 22, the protrusion 947 is inserted into a groove 221 formed on the outer periphery of the outer tube 22 (see FIG. 6). The groove 221 extends along the axial direction of the outer tube 22 and is recessed from the outer periphery. The groove 221 extends to the base end of the outer tube 22 and opens in the base end direction. When the medical tool 94 is moved along the outer cylinder 22, the rotation restricting portion 946 guides the medical tool 94 along the axial direction of the outer cylinder 22, and prevents rotational displacement of the medical tool 94 relative to the outer cylinder 22.

[0059] It should be noted that the present invention is not limited to the case where the jig body 941 includes the rotation restricting portion 946. The jig body 941 may not include the rotation restricting portion 946 (protrusion 947), and the outer cylinder 22 may not include the groove portion 221 with which the protrusion 947 engages. The rotation restricting portion 946 is not limited to the case where the protrusion 947 is included. For example, the rotation restricting portion 946 may have a groove portion formed on the inner peripheral surface of the jig body 941 and extending in the axial direction, and may be configured to be engageable with a protrusion formed on the outer peripheral surface of the outer cylinder 22 and protruding radially outward.

[0060] The guide portion 942 is provided at the tip portion of the jig body 941. As shown in Fig. 7A, the guide portion 942 is formed to protrude from the jig body 941 in the tip direction. The guide portion 942 has an internal space 943 and a flare portion 944. The internal space 943 is a space formed inside the guide portion 942, and into which the first support portion 26 is taken.

[0061] As shown in Fig. 7A, the flare portion 944 has an inverted tapered shape that gradually expands in diameter from the jig body 941 toward the tip. The lumen of the flare portion 944 opens at the tip. The tip of the flare portion 944 has an accommodation opening 944A that can accommodate the first and second support portions 26, 50. As shown in Fig. 6, when the medical jig 94 is attached to the outer circumferential portion 22A of the outer cylinder 22, the flare portion 944 is disposed on the tip side of the outer cylinder 22.

[0062] The partition wall portion 945 is formed from an elastically deformable member (for example, an elastic material or a resin material). The partition wall portion 945 protrudes from the inner peripheral surface of the guide portion 942 toward the internal space 943. The partition wall portion 945 protrudes radially inward from the inner peripheral surface of the flare portion 944. The partition wall portion 945 is formed along the axial direction of the flare portion 944. As shown in FIG. 7B, when the medical jig 94 is viewed from the axial direction of the medical jig 94, the partition wall portion 945 is disposed so as to pass through the central axis of the jig body 941. When the medical jig 94 is viewed from the axial direction of the medical jig 94, a virtual line D1 passing along the partition wall portion 945 is disposed so as to divide the jig body 941, which has a circular cross section, into two.

[0063] The partition portion 945 extends in the axial direction from the tip to the base end of the flare portion 944. The height of the partition portion 945 with respect to the inner circumferential surface of the flare portion 944 gradually increases from the tip to the base end of the flare portion 944. Note that the height of the partition portion 945 is not limited to gradually changing in the axial direction of the flare portion 944. The height of the partition portion 945 may be constant in the axial direction of the flare portion 944.

[0064] The partition 945 includes a fixed end 945A connected to the inner peripheral surface of the flare portion 944, and a free end 945B that is an end separated radially outward from the inner peripheral surface. The fixed end 945A of the partition 945 and the inner peripheral surface of the flare portion 944 are connected by a pair of curved surface portions 948. The pair of curved surface portions 948 are arc-shaped recessed radially outward. The partition 945 is configured so that the free end 945B side can tilt with the fixed end 945A as a base point. In the medical jig 94, only the partition 945 may be formed from an elastic member, or the entire medical jig 94 including the partition 945 may be formed from an elastic member. When the outer tube 22 is inserted into the jig cavity 941A of the medical jig 94, the outer peripheral surface of the outer tube 22 comes into contact with the partition portion 945, causing the partition portion 945 to elastically deform so as to bend around the fixed end 945A, and comes into contact in a curved state so as to fit along the outer peripheral surface of the outer tube 22.

[0065] Next, a method for transferring the medical sheet 300 to a treatment target part of a living body will be described. Specifically, as shown in Fig. 17 to Fig. 20, a method for transferring the medical sheet 300 to a transplant target part 402 of a heart 400 (treatment target part of a living body) by thoracoscopic surgery will be described. As shown in Fig. 8, the transfer method according to this embodiment includes a preparation step, a sheet placement step, a storage step, a positioning step, a deployment step, a movement step, and a removal step.

[0066] First, in a preparation step (step S1), the transport device 10 according to the present embodiment described above is prepared. In the following, the state shown in FIG. 1 will be described as the initial state of the transport device 10. In the initial state, the first and second shafts 24, 48 are moved in the distal direction (arrow X1 direction) relative to the outer tube 22, and the first support portion 26 and the second support portion 50 are in a protruding position (second position) protruding in the distal direction from the distal opening 80 of the outer tube 22. Each of the first and second support portions 26, 50 is exposed in the distal direction from the outer tube 22 and deployed, and the second support portion 50 is disposed on the first support surface 261 of the first support portion 26. That is, the second support portion 50 is disposed in a retracted position overlapping the first support surface 261 of the first support portion 26. At this time, the base end portion of the carrier holding portion 54 is inserted into the first inner cavity 28 of the first shaft 24. At this time, as shown in FIG. 6, the endoscope 14 is in a state of being removed from the outer tube 22.

[0067] Next, in the sheet placement step (step S2), as shown in Fig. 9, the medical sheet 300 placed in the petri dish 401 is placed on the second support surface 74. Note that, as shown in Fig. 10, the medical sheet 300 protrudes outward from the second support part 50 when placed on the second support surface 74. The first support surface 261 supports the protruding part 302 of the medical sheet 300 that protrudes outward from the second support part 50. The pair of second protrusions 40 suppress movement (displacement) of the medical sheet 300 in the width direction (W direction) of the intermediate support part 36 when the medical sheet 300 is placed on the second support surface 74.

[0068] Thereafter, an accommodation step (step S3 in FIG. 8) is performed in which the medical sheet 300 is accommodated in the outer cylinder 22. The accommodation step includes an attachment step in which a medical tool 94 is attached to the outer peripheral portion 22A of the outer cylinder 22.

[0069] 6, in the attachment step, the medical tool 94 is inserted from the base end of the outer tube 22 toward the tip end (the direction of the arrow X1). The base end of the outer tube 22 is inserted into the accommodation opening 944A of the flare portion 944, and the medical tool 94 is advanced from the base end of the outer tube 22 toward the tip end while the user is holding the outer tube 22. This results in the medical tool 94 being attached to the outer circumferential portion 22A of the outer tube 22. The medical tool 94 is disposed such that the internal space 943 of the guide portion 942 faces the tip opening 80 of the outer tube 22.

[0070] After the attachment step is completed, the medical sheet 300 is placed in a storage position (first position) together with the first support portion 26 and the second support portion 50 in the outer tube 22. Specifically, the medical tool 94 is advanced along the outer periphery 22A of the outer tube 22 toward the tip direction (arrow X1 direction) of the outer tube 22. That is, the medical tool 94 is moved in the axial direction (tip direction) relative to the outer tube 22. At this time, the partition portion 945 comes into contact with the outer periphery of the outer tube 22, so that the free end 945B side of the partition portion 945 is elastically deformed so as to bend radially outward from the fixed end 945A as a base point. The partition portion 945 curves along the outer periphery of the outer tube 22 and comes into contact with the outer periphery. In addition, the rotation restricting portion 946 of the medical tool 94 is inserted into the groove portion 221 of the outer tube 22, and the convex portion 947 of the rotation restricting portion 946 moves along the groove portion 221. The medical tool 94 is guided toward the tip direction (the direction of arrow X1) along the outer tube 22, and the relative rotation of the medical tool 94 with respect to the outer tube 22 is restricted. With the elastically deformed partition portion 945 in contact with the outer peripheral surface of the outer tube 22, the medical tool 94 moves toward the tip portion of the outer tube 22.

[0071] As shown in FIG. 11, when the outer tube 22 is advanced in the axial direction toward the tip (direction of arrow X1) until the base end of the flare portion 944 and the tip of the outer tube 22 coincide with each other, the base end support portion 34 of the first support portion 26 is inserted from the storage opening 944A of the flare portion 944 in the medical tool 94 into the inside of the flare portion 944 (internal space 943).

[0072] As shown in FIG. 12, by further moving the medical jig 94 in the distal direction (arrow X1 direction), the base end support portion 34 is inserted into the internal space 943 of the guide portion 942 (flare portion 944) from the base end support portion 34 to the intermediate support portion 36. At this time, the tapered both sides of the base end support portion 34 come into contact with the accommodation opening 944A of the flare portion 944, so that a force acts on the base end support portion 34 to curl the base end support portion 34 along the circumferential direction of the flare portion 944. Therefore, the base end support portion 34 is smoothly drawn into the jig inner cavity 941A of the jig main body 941 while gradually curling along the inner circumferential surface of the tapered flare portion 944 toward the proximal end direction. At this time, the first support portion 26 is accommodated in the jig inner cavity 941A of the jig main body 941 from the base end of the flare portion 944 while curling in a conical shape so that the distal end side has a large diameter and the base end support portion 34 has a small diameter.

[0073] When the base end support portion 34 is deformed, a force acts on the intermediate support portion 36 to curl up along the circumferential direction of the outer tube 22, so that the intermediate support portion 36 is deformed into a cylindrical shape while curling up along the inner circumferential surface of the flare portion 944. At this time, each of the pair of first protrusions 38 is curved so that the surface 461 of the first support portion 26 is on the inside and the back surface 462 of the first support portion 26 is on the outside, so that the first protrusions 38 are rolled up inward by the partition wall portion 945 at the center of the flare portion 944 (see FIG. 13). As shown in FIG. 13, the back surfaces 462 of the intermediate portions 443 that bulge outward in a convex shape in the radial direction face each other across the partition wall portion 945, centered on the imaginary line D2 extending in a direction perpendicular to the central axis of the medical jig 94.

[0074] As a result, the back surface 462 of the first support portion 26 is curved in intimate contact with the inner surface of the flare portion 944, and each of the first protrusions 38 is further curved so as to fold back toward the center of the flare portion 944, with the outer edge being disposed below the central axis of the flare portion 944. As shown in FIG. 13, the first support portion 26 is curved into a heart shape along the inner surface by contacting the inner surface of the flare portion 944. As the first support portion 26 is curved and deformed, the second support portion 50 is also curved and deformed along the first support portion 26 on the inside (surface 461 side) of the first support portion 26. As the first and second support portions 26, 50 are curved and deformed, the medical sheet 300 is deformed into a shape corresponding to the shapes of the first and second support bodies 32, 72.

[0075] 14, by further moving the medical jig 94 in the distal direction relative to the outer tube 22 from the position of the medical jig 94 and the outer tube 22 shown in Fig. 12, the first support part 26 is curved and deformed to the distal support part 42 by the inner surface of the guide part 942 (flared part 944) and the partition part 945, forming a heart shape, and the first support part 26 is accommodated from the base end of the guide part 942 into the jig inner cavity 941A of the jig main body 941. At this time, since the partition part 945 of the guide part 942 is disposed to face the center of the width direction of the first support part 26, the first support part 26 is folded and curved to have a symmetrical shape with the partition part 945 in between.

[0076] The heart shape refers to a generally circular shape consisting of a convexly curved shape on one side and two convexly curved shapes on the other side opposite to the one side. When a heart shape is formed in the lumen 78 of the tubular body (outer cylinder 22), the two convexly curved shapes protruding to the other side along the inner surface of the tubular body approach each other and part of the circumferential surface comes into contact with each other, so that the overall outline becomes a generally circular shape along the inner surface of the tubular body (see the shape of the first support part 26 in FIG. 16).

[0077] When the user moves the first and second shafts 24, 48 together in the proximal direction (the direction of the arrow X2) while holding the outer tube 22, the first support part 26, which has been curved and deformed into a heart shape, is drawn from the proximal support part 34 to the distal opening 80 of the outer tube 22 through the jig inner cavity 941A of the jig body 941 of the medical jig 94. The first support part 26 comes into contact with the inner surface of the inner cavity 78 of the outer tube 22, and is accommodated along the inner surface while maintaining the heart shape of the first support part 26.

[0078] 15, the accommodating step is completed when the entire first support part 26 is completely accommodated in the outer tube 22. The accommodated position is a position where the first shaft 24 is moved in the proximal direction (arrow X2 direction) relative to the outer tube 22 so that the first support part 26 is accommodated in the inner cavity 78 of the outer tube 22, and the first support part 26 is accommodated in the inner cavity 78 of the outer tube 22 in a curved and deformed state. When the accommodating step is completed, a part of the first support part 26 may protrude from the distal end opening 80 of the outer tube 22. In this case, the state where a part of the first support part 26 protrudes from the distal end opening 80 of the outer tube 22 is the first position of the first support part 26.

[0079] When the first support part 26, the second support part 50 and the medical sheet 300 are housed within the outer tube 22, as shown in FIG. 16, the pair of first protrusions 38 are positioned further towards the tip (in the direction of arrow X1) than the pressing surface 58 of the pressing part 56 with their back surfaces 462 in contact with each other (see FIG. 15).

[0080] After the medical sheet 300 is housed in the outer tube 22, the medical jig 94 is moved in the proximal direction (arrow X2 direction) relative to the outer tube 22 and removed in the proximal direction of the first shaft 24. For the next placement step, the tip of the endoscope 14 is attached to the outside of the outer tube 22 by the fixing member 16. The objective lens 88 of the endoscope body 86 faces in the tip direction of the outer tube 22 (arrow X1 direction). The tip of the endoscope body 86 is fixed to the middle part of the outer tube 22 in the axial direction.

[0081] In the accommodating step, the medical tool 94 may be moved relative to the outer tube 22 (first and second carrier members 18, 20) in the distal direction from a position where the base end of the guide portion 942 is aligned with the distal opening 80 of the outer tube 22 to accommodate the first support portion 26 inside the medical tool 94. For example, the user may hold the medical tool 94 and, with the base end of the guide portion 942 aligned with the distal opening 80 of the outer tube 22, move the first and second carrier members 18, 20 relative to the medical tool 94 in the proximal direction to accommodate the first support portion 26 inside the medical tool 94.

[0082] Thereafter, in a placement step (step S4 in FIG. 8), as shown in FIG. 17, the transfer instrument 10 is inserted into the thoracic cavity 410 through the incision 409 in the chest 408. At this time, the tip of the transfer instrument 10 is positioned near the transplant target portion 402 in the heart 400, and the tip of the endoscope 14 is positioned inside the thoracic cavity 410. Note that before inserting the transfer instrument 10 into the thoracic cavity 410, a liquid supply instrument (not shown) may be connected to the connection port of the hub 52 to introduce liquid (e.g., physiological saline).

[0083] Next, in the unfolding step (step S5 in FIG. 8), the first support part 26, the second support part 50, and the medical sheet 300 are unfolded as shown in FIG. 18. Specifically, in the unfolding step, the first shaft 24 is grasped and moved toward the tip (arrow X1 direction) relative to the outer tube 22. As a result, the valve body 55 of the first shaft 24 moves the second shaft 48 together with the first shaft 24 toward the tip (arrow X1 direction). Then, the first support part 26 exposed from the tip opening 80 of the outer tube 22 returns to its original shape by a restoring force. In the second position where the first support part 26 is unfolded, the second support part 50 and the medical sheet 300 spread out into a planar shape.

[0084] In the unfolding step, the second carrier member 20 has the second support surface 74, on which the medical sheet 300 is placed, positioned entirely above the first support surface 261. At this time, the medical sheet 300 is supported by the first support surface 261 and the second support surface 74. This makes it possible to prevent wrinkles from forming in the protruding portion 302 of the medical sheet 300 before the medical sheet 300 is transferred to the transplantation target portion 402 of the heart 400.

[0085] 19, by moving the second carrier member 20 in the distal direction (arrow X1 direction) relative to the first carrier member 18, the second support part 50 on which the medical sheet 300 is placed moves from the retracted position to the advanced position, and the second support part 50 protrudes in the distal direction (arrow X1 direction) beyond the tip of the first support part 26. Specifically, in the moving step, the second shaft 48 is moved in the distal direction relative to the first shaft 24.

[0086] As a result, the second support part 50 moves in the distal direction (direction of arrow X1) relative to the first support part 26. At this time, when the pressing surface 58 of the carrier holding part 54 (pressing part 56) presses the outer peripheral end face of the medical sheet 300 in the distal direction, the entire medical sheet 300 is positioned further distally than the first support part 26. In this moving step, the medical sheet 300 is moved above the transplant target part 402 of the heart 400, and the overhanging part 302 of the medical sheet 300 is brought into contact with the transplant target part 402.

[0087] Then, in the removal step (step S7 in FIG. 8), as shown in FIG. 20, the second carrier member 20 is moved from the second position to the first position to remove the second support part 50 from between the transplantation target part 402 and the medical sheet 300. Then, the entire medical sheet 300 comes into contact with the surface of the transplantation target part 402. This completes the transfer of the medical sheet 300 to the transplantation target part 402. Thereafter, the transferring instrument 10 is removed from the chest 408 with the first support part 26 and the second support part 50 housed within the outer cylinder 22.

[0088] This embodiment provides the following advantages.

[0089] As shown in FIG. 7A, a medical tool 94 used in the transfer instrument 10 includes a tool body 941 that is detachable from the outer circumferential portion 22A of the outer tube 22, a guide portion 942 that extends from the tip of the tool body 941 toward the tip and has an internal space 943 into which the first carrier member 18 is incorporated, and a partition portion 945 that protrudes from the inner circumferential surface of the guide portion 942 toward the internal space 943.

[0090] As shown in FIG. 1, in the second position of the transfer instrument 10 in which the first support part 26 is exposed and protruding from the tip opening 80 of the outer tube 22, when the first support part 26 is moved relative to the medical tool 94 in the base end direction, the guide part 942 and the partition part 945 guide the first support part 26 within the internal space 943, and deform the first support part 26 into a curved shape so that both widthwise sides of the first support part 26 protrude toward the first support surface 261, as shown in FIG.

[0091] As a result, even if the width W of the first support portion 26 of the transfer device 10 is greater than the inner circumference length L of the outer tube 22, by moving the first support portion 26 and the medical tool 94 relative to each other in the axial direction, the guide portion 942 and the partition portion 945 of the medical tool 94 effectively deform the first support portion 26 into a predetermined curved shape, and the medical tool 94 can effectively accommodate the first support portion 26 in the inner cavity 78 of the outer tube 22.

[0092] As shown in Fig. 7A, the medical jig 94 is a tubular body formed in a ring shape along the axial direction of the medical jig 94, and the partition wall 945 is formed from an elastically deformable member. With this, as shown in Fig. 6, when the medical jig 94 is attached to the outer circumferential portion 22A of the outer tube 22, the medical jig 94 can be easily slid in the axial direction along the outer tube 22, and the first support portion 26 can be effectively taken into the medical jig 94 to form a curved shape by sliding the medical jig 94 toward the distal end. When a medical tool 94 is inserted from the base end of the outer tube 22 through the outer circumferential portion 22A of the outer tube 22 and the medical tool 94 and the outer tube 22 are moved relative to each other in the axial direction, the partition portion 945 contacts the outer circumferential portion 22A of the outer tube 22 and elastically deforms, so that the partition portion 945 does not hinder the advancement of the medical tool 94 toward the tip of the outer tube 22. Moreover, when the partition portion 945 moves toward the tip from the tip opening 80 of the outer tube 22, the elasticity of the partition portion 945 allows the partition portion 945 to protrude radially inward of the outer tube 22.

[0093] 7B, the jig body 941 engages with the outer circumferential portion 22A of the outer tube 22, is supported axially movably relative to the outer tube 22, and includes a rotation restricting portion 946 that restricts rotation relative to the outer tube 22. This allows the medical jig 94 to move linearly toward the distal end relative to the outer tube 22, preventing relative rotation, by the rotation restricting portion 946. Therefore, the partition portion 945 can be effectively disposed in the center of the width of the first support portion 26, and the partition portion 945 allows the medical sheet 300 to be smoothly folded into a predetermined curved shape.

[0094] 7A, guide portion 942 has a flare portion 944 that expands in diameter from jig body 941 toward the tip. With this, by having flare portion 944, first support portion 26 can be smoothly taken into internal space 943 from the tip of guide portion 942 and gradually deformed into a predetermined curved shape.

[0095] The partition portion 945 is formed along the axial direction of the medical jig 94. This allows the first support portion 26 to be deformed into a curved shape over a wide range in the axial direction by the partition portion 945 extending along the axial direction.

[0096] As the medical tool constituting the transfer device 10, a medical tool 100 according to a modified example shown in FIG. 21 may be adopted instead of the medical tool 94 constituted by a cylindrical member as shown in FIG.

[0097] The medical jig 100 includes a jig body 104, a guide portion 106, a partition portion 108, and an opening 102. As shown in Fig. 22, the medical jig 100 has an opening 102 formed by cutting out a portion of the jig body 104, which is a tubular body, and the guide portion 106. The opening 102 opens in the medical jig 100 in a direction perpendicular to the axial direction of the medical jig 100 (radial direction). The opening 102 is formed over the entire length of the medical jig 100 in the axial direction.

[0098] The partition portion 108 is provided in the internal space 106A of the guide portion 106. The partition portion 108 faces the opening 102 of the guide portion 106, and is disposed in the opposite direction to the opening 102 when the medical jig 100 is viewed in the axial direction. The guide portion 106 has a flare portion 110 that expands in diameter from the tip of the jig body 104 toward the tip. The partition portion 108 is formed with a hardness that does not elastically deform. Note that the partition portion 108 may be elastically deformable.

[0099] When the medical tool 100 is attached to the outer periphery 22A of the outer tube 22, the axial direction of the outer tube 22 and the opening direction of the opening 102 are perpendicular to each other. The medical tool 100 is attached to the outer periphery 22A of the outer tube 22 from the radial outside of the outer tube 22 through the opening 102 of the medical tool 100. That is, the outer tube 22 is inserted into the jig body 104 and the guide part 106 through the opening 102 of the medical tool 100. At this time, the base end of the guide part 106 and the tip opening 80 of the outer tube 22 are aligned in the axial direction of the transfer instrument 10. As a result, a part of the outer periphery 22A of the outer tube 22 is covered by the medical tool 100. The axial direction of the outer tube 22 and the axial direction of the medical tool 100 are arranged parallel to each other.

[0100] In the accommodation step, with the base end of the guide portion 106 and the distal end opening 80 of the outer tube 22 aligned in position, the user grasps the first support portion 26 on which the medical sheet 300 is placed, and curves the first support portion 26 so that the medical sheet 300 faces inward. The curved first support portion 26 is inserted into the guide portion 106 through the opening 102 of the guide portion 106. As a result, the first support portion 26 is accommodated inside the guide portion 106, and the back surface 462 of the first support portion 26 abuts against the inner surface of the guide portion 106. By moving the medical tool 100 relative to the outer tube 22 in the distal direction, the inner surface of the flare portion 944 takes the first support portion 26 of the first carrier member 18 into the internal space 106A of the guide portion 106, and the flare portion 110 folds the first support portion 26 into a predetermined curved shape and accommodates it in the inner cavity 78 of the outer tube 22.

[0101] In the accommodation step, the method of accommodating the first support part 26 in the guide part 106 is not limited to the method in which the user bends the first support part 26 and inserts it into the guide part 106. For example, in a state in which the base end of the guide part 106 and the tip opening 80 of the outer tube 22 are aligned in position, the first and second carrier members 18, 20 are moved relative to the outer tube 22 in the tip direction, and the base end support part 34 of the first support part 26 is disposed in the tip direction of the guide part 106 of the medical jig 100. In this state, by moving the first and second carrier members 18, 20 in the base end direction relative to the medical jig 100, the first support part 26 on which the medical sheet 300 is placed can be accommodated from the tip of the guide part 106 into the inside and curved.

[0102] This modified example has the following advantages.

[0103] 21, the medical jig 100 has an opening 102 that opens in a direction perpendicular to the axial direction, and the opening 102 is formed over the entire length in the axial direction. The opening direction of the opening 102 is perpendicular to the axial direction of the outer tube 22. This allows the medical jig 100 to be attached to the outer periphery 22A of the outer tube 22 from the radially outside of the outer tube 22, making it easy to attach and detach the medical jig 100 to and from the outer tube 22.

[0104] The present invention is not limited to the above disclosure, and various configurations can be adopted without departing from the gist of the present invention. [Explanation of symbols]

[0105] 10…Transfer device 12...Main unit 18...First carrier member 22…Outer cylinder 24…First shaft 26…First support part 80…Tip opening 94, 100...Medical tools 300…Medical sheets 402…Transplant target area 104, 941...Jig body 106, 942…Guide section 108, 945… next door

Claims

1. A medical tool used as a transfer device for transferring a medical sheet to a treatment target part of a living body, The transfer device includes a barrel having a distal end opening; a carrier member having a cylindrical shaft extending in an axial direction of the outer cylinder and disposed inside the outer cylinder so as to be movable along the axial direction, and a sheet-shaped support portion disposed at a tip end of the shaft; the support portion includes a support surface capable of holding the medical sheet, and a width of the support portion in a direction perpendicular to an extension direction of the shaft is greater than an inner peripheral length of the outer tube, At a first position where the shaft is moved in a proximal direction relative to the outer cylinder so that the support portion is accommodated in the outer cylinder, the support portion is accommodated in the outer cylinder in a curved and deformed state, At a second position where the shaft is moved in a distal direction relative to the outer tube so that the support portion protrudes from a distal opening of the outer tube, the support portion is exposed in the distal direction from the outer tube and deployed, The medical tool comprises: A jig body that is detachably attached to the outer periphery of the outer cylinder; A guide portion extending from a tip portion of the jig body toward the tip direction and having an internal space into which the carrier member is taken; a partition wall portion protruding from an inner circumferential surface of the guide portion toward the internal space; Equipped with When the medical tool is attached to the outer circumferential portion of the outer cylinder, the inner space of the guide portion is disposed toward the distal end opening of the outer cylinder, A medical jig, wherein when the support part of the transfer instrument protrudes in the tip direction from the tip part of the outer tube, and the medical sheet is placed on the support part, and the support part and the medical jig are moved relative to each other from a position where the tip opening of the outer tube and the internal space of the guide part face each other, so that the support part moves relatively in the base end direction relative to the medical jig, the guide part and the partition part guide the support part within the internal space and deform the support part into a curved shape so that both widthwise sides of the support part protrude toward the support surface.

2. The medical tool according to claim 1, The medical tool is a tubular body formed in a ring shape along the axial direction, The partition portion is formed from an elastically deformable material.

3. The medical tool according to claim 2, The medical tool includes a jig body that engages with the outer periphery of the outer tube, is supported movably along the axial direction relative to the outer tube, and is provided with a rotation restricting portion that restricts rotation relative to the outer tube.

4. The medical tool according to claim 1, The medical tool has an opening that opens in a direction perpendicular to the axial direction, and the opening is formed over an entire length in the axial direction, The medical tool, wherein an opening direction of the opening is perpendicular to the axial direction of the outer cylinder.

5. The medical tool according to claim 1, The guide portion has a flared portion that expands in diameter from the jig body toward the tip.

6. The medical tool according to claim 1, The partition portion is formed along the axial direction.

7. An instrument body for transferring the medical sheet to a treatment target part of a living body; A medical tool that is detachable from the instrument body; A transfer device comprising: The instrument body includes an outer cylinder having a tip opening; a carrier member having a cylindrical shaft extending in an axial direction of the outer cylinder and disposed inside the outer cylinder so as to be movable along the axial direction, and a sheet-shaped support portion disposed at a tip end of the shaft; the support portion includes a support surface capable of holding the medical sheet, and a width of the support portion in a direction perpendicular to an extension direction of the shaft is greater than an inner peripheral length of the outer tube, At a first position where the shaft is moved in a proximal direction relative to the outer cylinder so that the support portion is accommodated in the outer cylinder, the support portion is accommodated in the outer cylinder in a curved and deformed state, At a second position where the shaft is moved in a distal direction relative to the outer tube so that the support portion protrudes from a distal opening of the outer tube, the support portion is exposed in the distal direction from the outer tube and deployed, The medical tool is a transfer tool according to any one of claims 1 to 6.

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