Transfer equipment

Abstract

To provide transfer equipment for transferring a medical sheet to a treatment object part of a living body more efficiently.SOLUTION: In transfer equipment 10, a medical sheet 300 is supported by a first support surface 261 of a first support part 26 and a second support surface 74 of a second support part 50. The second support part 50 is of a shape that is tapered in the tip direction of the transfer equipment 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Patent Document 1 discloses a transfer device for transferring a medical sheet (cell sheet) used, for example, in organ transplantation to a treatment target part of a living body. This transfer device comprises an outer tube, a sliding member slidably supported within the outer tube, and a sheet support member provided at the tip of the sliding member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-000511 A Summary of the Invention [Problem to be solved by the invention]

[0004] It is desirable to more efficiently transport medical sheets to the treatment site. [Means for solving the problem]

[0005] (1) An aspect of the present invention is a transfer device for transferring a medical sheet to a treatment target area of ​​a living body, comprising: a first carrier member including a first shaft and a first support portion provided at a tip of the first shaft and having a first support surface; a second carrier member including a second shaft extending along the first shaft and movable along the first shaft; and a second support portion provided at the tip of the second shaft and having a second support surface smaller than the first support surface, wherein the medical sheet is supported by the first support surface and the second support surface, and the second support portion has a shape that tapers toward the tip.

[0006] With this configuration, the medical sheet can be efficiently transported to the treatment area by moving the second shaft along the first shaft while the medical sheet is supported by the first support surface and the second support surface.

[0007] Furthermore, with this configuration, since the second support part has a shape that tapers toward the distal end, the contact area of ​​the second support surface with the medical sheet becomes smaller toward the distal end, and the frictional resistance between the medical sheet and the second support surface decreases. As a result, after the medical sheet has been transferred to the treatment target area, when the second shaft is moved toward the proximal end along the first shaft, the medical sheet adhering to the second support surface can be prevented from returning toward the proximal end.

[0008] (2) In the transfer device described in (1) above, the second support portion has a tapered portion that tapers toward the tip between a maximum width point in a width direction of the second support portion perpendicular to the axial direction of the second shaft and the tip of the second support portion, and when the maximum width is L1 and the length of the tapered portion in the axial direction is L2, L2 may be 50% or more of L1.

[0009] With this configuration, since L2 is 50% or more of L1 (L2≧L1 / 2), the contact area of ​​the second support surface with the medical sheet at the tapered portion is small, which effectively prevents the medical sheet from returning in the proximal direction while adhering to the second support surface when the second shaft is moved in the proximal direction along the first shaft after the medical sheet has been transferred to the treatment target area.

[0010] (3) In the transfer device described in (2) above, the side edges on both sides of the tapered portion in the width direction may be straight, and the distance between the side edges on both sides in the width direction may become shorter toward the tip of the second support portion.

[0011] With this configuration, the tapered portion has straight side edges on both sides in the width direction, and the distance between the side edges becomes shorter toward the tip of the second support portion, so that the tapered portion can be formed into an acute-angled triangle, which makes it easy to reduce the contact area between the second support surface and the medical sheet at the tapered portion.

[0012] (4) In the transfer device described in (2) above, the tapered portion has a first portion including the widest point, a second portion including the tip of the second support portion, and an intermediate portion between the first and second portions, and the intermediate portion may have side edges on both sides in the width direction that are recessed inward in the width direction.

[0013] With this configuration, the tapered portion has a first portion, an intermediate portion, and a second portion, and both side edges of the intermediate portion are recessed inward in the width direction, which makes it easy to reduce the contact area of ​​the second support surface with the medical sheet at the tapered portion.

[0014] (5) In the conveying device according to any one of (1) to (4) above, a leading edge of the second support portion may be formed in an arc shape.

[0015] According to this configuration, since the distal edge of the second support part is formed in an arc shape, it is possible to prevent the distal edge of the second support part from damaging the treatment target part when the second shaft is moved in the distal direction along the first shaft, and it is also possible to prevent the medical sheet supported on the second support surface from coming into contact with the distal edge of the second support part and being damaged.

[0016] (6) In the transferring device described in any one of (1) to (5) above, the medical sheet may be supported on the second supporting surface.

[0017] With this configuration, by moving the second shaft along the first shaft while the medical sheet is supported on the second support surface, the medical sheet can be efficiently transported to the area to be treated.

[0018] (7) In the transfer device described in any one of (1) to (6) above, the second carrier member further has a pressing portion provided at the tip of the second shaft, the second support portion is fixed to the pressing portion, the first support surface is an upper surface of the first support portion, the second support surface is a bottom surface of the second support portion opposite the first support surface, the medical sheet is supported between the first support surface and the second support surface, and the pressing portion may be capable of pressing the medical sheet supported between the first support surface and the second support surface in the tip direction.

[0019] According to this configuration, when the medical sheet is supported between the first support surface and the second support surface and the second shaft is moved along the first shaft, the medical sheet is pressed toward the tip by the pressing portion, thereby efficiently transporting the medical sheet to the area to be treated.

[0020] Furthermore, with this configuration, the medical sheet is supported in the vertical direction by the first support surface and the second support surface, so that the medical sheet can be transported to the treatment target area while suppressing the occurrence of wrinkles in the medical sheet.

[0021] (8) In the transfer device described in (7) above, the second support portion may have a bent portion in which a part of the second support portion including a tip of the second support portion is bent in a direction away from the first support surface.

[0022] With this configuration, by lifting the bent portion in a direction away from the first support surface, the second support portion can be easily bent in a direction away from the first support surface. This forms a gap between the first support surface and the second support surface, making it easy to place the medical sheet between the first support surface and the second support surface.

[0023] (9) In the conveying device described in (7) above, the second support portion may have a protrusion provided on an upper surface opposite the second support surface.

[0024] With this configuration, by lifting the protrusion in a direction away from the first support surface, the second support part can be easily curved in a direction away from the first support surface. This forms a gap between the first support surface and the second support surface, making it easy to place the medical sheet between the first support surface and the second support surface.

[0025] (10) The transfer device according to any one of (1) to (9) above may further include an outer tube having a distal opening, wherein the first shaft and the second shaft are movable along the outer tube inside the outer tube, and at a first position where the first shaft and the second shaft are moved in a base end direction relative to the outer tube so that the first support portion and the second support portion are contained within the outer tube, the first support portion and the second support portion are contained within the outer tube in a curved and deformed state, and at a second position where the first shaft and the second shaft are moved in the distal end direction relative to the outer tube so that the first support portion and the second support portion protrude from the distal opening, the first support portion and the second support portion may be deployed by being exposed in the distal direction from the outer tube.

[0026] According to this configuration, the first support part and the second support part can be compactly housed in the outer cylinder at the first position. Also, since the second support part has a shape that tapers toward the tip, it is possible to effectively prevent wrinkles from occurring in the second support part when the second support part is housed in the outer cylinder.

[0027] (11) In the transfer device described in (10) above, the second support part may be bent or curved toward the first support part at a central portion of the width of the second support part perpendicular to the axial direction of the second shaft, and in the first position, the second support part may be accommodated within the outer tube in a circularly curved and deformed state around the bent or curved central portion.

[0028] According to this configuration, the center portion in the width direction of the second support portion is bent or curved toward the first support portion. This allows the second support portion to be easily curved and deformed into a circular shape around the bent or curved center portion at the first position and accommodated in the outer tube. As a result, when the second support portion is accommodated in the outer tube, the occurrence of wrinkles in the second support portion can be effectively suppressed.

[0029] (12) In the transfer device described in (11) above, the portion of the second support surface between the portion that bends or curves toward the first support portion and the tip of the second support portion may be a flat surface.

[0030] With this configuration, the portion of the second support surface between the point where it bends or curves toward the first support portion and the tip of the second support portion is a flat surface, making it easier to support the medical sheet on the flat surface. Effect of the Invention

[0031] According to the present invention, the medical sheet can be efficiently transported to the treatment area by moving the second shaft along the first shaft while the medical sheet is supported by the first support surface and the second support surface.

[0032] Furthermore, according to the present invention, since the second support part has a shape that tapers toward the distal end, the contact area of ​​the second support surface with the medical sheet becomes smaller toward the distal end, and the frictional resistance between the medical sheet and the second support surface decreases. This makes it possible to prevent the medical sheet from returning toward the proximal end while adhering to the second support surface when the second shaft is moved toward the proximal end along the first shaft after the medical sheet has been transferred to the treatment target area. [Brief description of the drawings]

[0033] [Figure 1] FIG. 1 is a perspective view of a delivery device according to a first 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 flow chart showing the steps of a method for transferring a medical sheet using the transfer device of FIG. [Figure 7] FIG. 7 is a first explanatory diagram showing the arrangement of the medical sheet in the sheet placing step. [Figure 8] FIG. 8 is a second explanatory diagram showing the arrangement of the medical sheet in the sheet placing step. [Figure 9] FIG. 9 is an explanatory diagram of the accommodation step. [Figure 10] FIG. 10 is a cross-sectional view taken along line XX in FIG. [Figure 11] FIG. 11 is an explanatory diagram of the arrangement process. [Figure 12] FIG. 12 is an explanatory diagram of the development process. [Figure 13] FIG. 13 is an explanatory diagram of the movement process. [Figure 14] FIG. 14 is an explanatory diagram of the removal step. [Figure 15] FIG. 15 is a plan view of the distal end of a transfer device according to a second embodiment of the invention. [Figure 16] FIG. 16 is a perspective view of a distal end of a transfer device according to a third embodiment of the invention. [Figure 17] FIG. 17 is a perspective view of a distal end of a transfer device according to a fourth embodiment of the invention. [Figure 18] FIG. 18 is a cross-sectional view of the transfer device of FIG. [Figure 19] FIG. 19 is an explanatory diagram of the movement process. [Figure 20] FIG. 20 is a perspective view of a distal end of a transfer device according to a fifth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] FIG. 1 is a perspective view of a transfer device 10 according to a first embodiment of the present invention. The transfer device 10 is a medical device for transferring a medical sheet 300 to a treatment target portion 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 portion 402 of a heart 400 (a treatment target portion of a living body) (see FIGS. 11 to 14). The transfer device 10 can attach multiple medical sheets 300 to the transplant target portion 402.

[0035] 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).

[0036] 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.

[0037] 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.

[0038] 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.

[0039] In FIG. 2, the first carrier member 18 includes a first shaft 24 and a first support 26 .

[0040] The first shaft 24 is a tubular body (a circular tube member in the first embodiment) having a first lumen 28. The first lumen 28 opens at the tip end (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.

[0041] 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 material of the first shaft 24 is not particularly limited, but may include polyethylene, polypropylene, fluororesin, polyethylene terephthalate, polymethyl methacrylate, polyamide resin, polystyrene, polycarbonate, polyimide, polyetherimide, polyether ether ketone, polyvinyl chloride, ABS resin, polyamide elastomer, polyester elastomer, etc. The first shaft 24 may be made of a metal material.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] As shown in Fig. 3, the base end support part 34 is formed to be wider in the extension direction. In other words, both sides of the base end support part 34 in the width direction (arrow W direction perpendicular to the arrow X1 direction, the arrow X2 direction, and the arrow Y direction) are tapered toward the first joint part 30 (see Fig. 2). The intermediate support part 36 is formed in a tapered shape whose width gradually decreases from the tip toward the base end (arrow X2 direction).

[0048] 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.

[0049] 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).

[0050] 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 (in the direction of arrow W) of the intermediate support part 36 that is 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.

[0051] 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.

[0052] 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).

[0053] 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.

[0054] As shown in FIG. 2, the second carrier member 20 includes a second shaft 48 , a second support portion 50 , and a hub 52 .

[0055] The second shaft 48 is a tubular body (a circular tube member in the first 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.

[0056] 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.

[0057] 4, the second shaft 48 has a carrier holding portion 54 (pressing portion) 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.

[0058] 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 the first 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.

[0059] 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. 13).

[0060] 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.

[0061] 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 on which the medical sheet 300 is placed is provided on the upper surface 184 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.

[0062] In FIG. 2, the hub 52 is attached to the proximal end of the second shaft 48 .

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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 the first 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. 10). 10, 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.

[0069] As shown in Fig. 5, in a cross section perpendicular to the axis of the second shaft 48, the carrier holding portion 54 has a shape that is line-symmetrical with respect to a virtual line T1 that passes through the center line C of the carrier holding portion 54 and is parallel to the width direction (arrow W direction) of the carrier holding portion 54. In other words, the carrier holding portion 54 has a shape that is symmetrical in the up-down direction with the virtual line T1 as the center. As shown in Fig. 5, the carrier holding portion 54 has a flat cross section. Note that the carrier holding portion 54 is not limited to being formed with a flat cross section, and may be formed with, for example, a circular cross section, an elliptical cross section, a square cross section, a rectangular cross section, or the like.

[0070] The mounting hole 60 is disposed on the center line C of the carrier holding portion 54 on the pressing surface 58. The mounting hole 60 is slit-shaped extending parallel to the width direction of the carrier holding portion 54 from the center line C. The mounting hole 60 is symmetrical in the width direction with the center line C as the center. The mounting hole 60 extends in the axial direction from the pressing surface 58 (see FIG. 4). As described above, the second joint portion 70 of the second support portion 50 is inserted into and connected to the mounting hole 60.

[0071] The medical sheet 300 is supported by the first supporting surface 261 and the second supporting surface 74 (see FIGS. 7 and 8). Specifically, the medical sheet 300 is placed on the first supporting surface 261 and the second supporting surface 74. When the medical sheet 300 is placed on the second supporting surface 74, the portion of the medical sheet 300 that does not fit on the second supporting surface 74 is supported by the first supporting surface 261.

[0072] As shown in Figs. 1 to 3, the second support part 50 has a shape that tapers toward the tip. More specifically, the second support part 50 has a shape that expands in the width direction (direction of arrow W) from the second joint part 70 toward the tip, and tapers from a location of maximum width L1 of the second support part 50 in the width direction toward the tip. The second support part 50 has a tapered portion 100. The tapered portion 100 is a portion of the second support part 50 between the location of maximum width L1 and a tip 102 of the second support part 50.

[0073] When the length of the tapered portion 100 in the axial direction of the second shaft 48 is L2, L2 is 50% or more of L1 (L2≧L1 / 2). It is preferable that L2 is longer than L1 (L2≧L1). It is more preferable that L2 is 150% or more of L1 (L2≧1.5×L1).

[0074] The tapered portion 100 is formed in a triangular shape with an acute angle on the tip 102 side of the second support part 50. Side edges 104 on both sides in the width direction of the tapered portion 100 are straight. The width direction distance L3 between the two side edges 104 becomes shorter as it approaches the tip 102 of the second support part 50.

[0075] A tip edge 106 of the second support part 50, including the tip 102 of the second support part 50, is formed in an arc shape. Note that the tip edge 106 of the second support part 50 is not limited to being arc-shaped. The tip edge 106 of the second support part 50 may have any shape that does not damage the medical sheet 300 when it comes into contact with the medical sheet 300.

[0076] 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. 11 to Fig. 14, 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. 6, the transfer method according to the first 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.

[0077] First, in a preparation step (step S1), the transfer device 10 according to the first embodiment described above is prepared. In the following, the state shown in FIG. 1 will be described as the initial state of the transfer device 10. In the initial state, the first shaft 24 and the second shaft 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.

[0078] 7 and 8, in the sheet placement step (step S2), the medical sheet 300 placed in the petri dish 401 is placed on the second support surface 74. The medical sheet 300 protrudes outward from the second support portion 50 when placed on the second support surface 74. The first support surface 261 supports the protruding portion 302 of the medical sheet 300 that protrudes outward from the second support portion 50.

[0079] Thereafter, in the accommodation step (step S3 in FIG. 6), the medical sheet 300 is accommodated in the outer cylinder 22 together with the first support portion 26 and the second support portion 50 (see FIG. 8) to a accommodated position (first position) as shown in FIG. 9. Specifically, the first shaft 24 of the first carrier member 18 and the second shaft 48 of the second carrier member 20 are moved together in the base end direction (arrow X2 direction) relative to the outer cylinder 22.

[0080] Then, the base end support portion 34 (see FIG. 2) of the first support portion 26 is drawn in the base end direction from the tip opening 80 of the outer tube 22. At this time, the tapered both sides of the base end support portion 34 come into contact with the tip opening 80 of the outer tube 22, 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 outer tube 22. Therefore, the base end support portion 34 is smoothly drawn into the outer tube 22 while curling. At this time, the first support portion 26 is accommodated in the outer tube 22 while curling into a cone shape such that the tip side has a large diameter and the base end support portion 34 has a small diameter.

[0081] When the base end support portion 34 of the first support portion 26 is deformed, a force acts on the middle support portion 36 of the first support portion 26 to curl up along the circumferential direction of the outer tube 22, so that the middle support portion 36 (see FIG. 2) is drawn into the outer tube 22 while curling up. At this time, the middle support portion 36 is deformed into a cylindrical shape along the inner surface of the outer tube 22. 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. As shown in FIG. 10, the back surfaces 462 on both sides in the width direction of the first support portion 26 come into contact with each other on a virtual line T2 extending in a direction perpendicular to the central axis of the outer tube 22. One first protrusion 38 and the other first protrusion 38 come into contact with each other and are accommodated downward (first support surface 261, surface 461).

[0082] As a result, the back surface 462 of the first support portion 26 is curved in intimate contact with the inner surface of the outer tube 22, and each of the first protrusions 38 is further curved so as to be folded back toward the center of the outer tube 22, and the free end of each of the first protrusions 38 is disposed below the central axis of the outer tube 22. In other words, the first support portion 26 is curved into a heart shape along the inner surface of the outer tube 22.

[0083] 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 inner cavity 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. 10).

[0084] As the first support part 26 is curved and deformed, the second support part 50 is also curved and deformed along the first support part 26 on the inside (surface 461 side) of the first support part 26. As the first support part 26 and the second support part 50 are curved and deformed, the medical sheet 300 is deformed into a shape corresponding to the shapes of the first support body 32 and the second support body 72, and the medical sheet 300 is contained within the outer cylinder 22.

[0085] 9, the accommodating step is completed when the entire first support part 26 is completely inserted into the outer cylinder 22. When the accommodating step is completed, a part of the first support part 26 may protrude from the tip opening 80 of the outer cylinder 22. In this case, the state in which a part of the first support part 26 protrudes from the tip opening 80 of the outer cylinder 22 is the first position of the first support part 26.

[0086] Thereafter, in a placement step (step S4 in FIG. 6), as shown in FIG. 11, 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).

[0087] Next, in the unfolding step (step S5 in FIG. 6), the first support part 26, the second support part 50, and the medical sheet 300 are unfolded as shown in FIG. 12. 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 spreads out into a planar shape.

[0088] 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.

[0089] 13, 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.

[0090] 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 distal end surface (pressing surface 58) of the carrier holding part 54 (pressing part 56) presses the outer peripheral end surface of the medical sheet 300 in the distal direction, the entire medical sheet 300 is positioned in the distal direction further than the first support part 26. In this moving step, the medical sheet 300 is moved above the transplantation target part 402 of the heart 400, and the overhanging part 302 of the medical sheet 300 is brought into contact with the transplantation target part 402.

[0091] Thereafter, in the removal step (step S7 in FIG. 6), as shown in FIG. 14, the second carrier member 20 is moved from the second position to the first position. Since the tapered portion 100 of the second support member 50 is tapered toward the distal end, the contact area of ​​the second support surface 74 with the medical sheet 300 becomes smaller toward the distal end. This reduces the frictional resistance between the medical sheet 300 and the second support surface 74. Therefore, when the second carrier member 20 is moved from the second position to the first position, the second support member 50 can be easily pulled out from between the transplantation target portion 402 and the medical sheet 300. This brings the entire medical sheet 300 into contact with the surface of the transplantation target portion 402. As a result, even if the second carrier member 20 is moved from the second position to the first position, the medical sheet 300 does not return toward the base end. This completes the transfer of the medical sheet 300 to the transplantation target portion 402. Thereafter, the delivery device 10 is removed from the chest 408 with the first support part 26 and the second support part 50 still housed within the outer tube 22 .

[0092] The first embodiment provides the following advantages.

[0093] By moving the second shaft 48 along the first shaft 24 from a state in which the medical sheet 300 is supported by the first support surface 261 and the second support surface 74 as shown in Figure 12, the medical sheet 300 can be efficiently transported to the transplant target area 402 (treatment target area) (see Figure 13).

[0094] As shown in Fig. 3, the second support part 50 has a shape that tapers toward the distal end, so that the contact area of ​​the second support surface 74 with the medical sheet 300 (see Fig. 8) becomes smaller toward the distal end, and the frictional resistance between the medical sheet 300 and the second support surface 74 becomes smaller. As a result, as shown in Figs. 13 and 14, after the medical sheet 300 is transferred to the transplantation target part 402, when the second shaft 48 is moved in the proximal direction along the first shaft 24, it is possible to prevent the medical sheet 300 from returning in the proximal direction while adhering to the second support surface 74. As a result, when placing the medical sheet 300 in the transplantation target part 402, which is in a narrow space inside the living body, the medical sheet 300 can be transferred and placed in the transplantation target part 402 without using a support member such as forceps.

[0095] 3, since L2 is 50% or more of L1 (L2≧L1 / 2), the contact area of ​​the second support surface 74 with the medical sheet 300 at the tapered portion 100 is small. This makes it possible to effectively prevent the medical sheet 300 from returning in the proximal direction while adhering to the second support surface 74 when the second shaft 48 is moved in the proximal direction along the first shaft 24 after the medical sheet 300 has been transferred to the transplantation target portion 402, as shown in FIG.

[0096] 3, both side edges 104 of the tapered portion 100 in the width direction (arrow W direction) are straight, and the widthwise distance L3 between the both side edges 104 becomes shorter toward the tip 102 of the second support part 50, so that the tapered portion 100 can be formed into an acute-angled triangle. This makes it possible to easily reduce the contact area of ​​the second support surface 74 with the medical sheet 300 (see FIG. 8) at the tapered portion 100.

[0097] Since the distal edge 106 of the second support part 50 is formed in an arc shape, it is possible to prevent the transplant target part 402 from being damaged by the distal edge 106 of the second support part 50 when the second shaft 48 is moved in the distal direction along the first shaft 24. It is also possible to prevent the medical sheet 300 supported by the second support surface 74 from coming into contact with the distal edge 106 of the second support part 50 and being damaged.

[0098] With the medical sheet 300 supported on the second support surface 74 as shown in Figure 12, the second shaft 48 can be moved along the first shaft 24 to efficiently transport the medical sheet 300 to the transplant target area 402 (see Figure 13).

[0099] 9, in the first position, the first support part 26 and the second support part 50 can be compactly housed in the outer tube 22. In addition, as shown in FIG. 3, since the second support part 50 has a shape that tapers toward the tip, when the second support part 50 is housed in the outer tube 22, the occurrence of wrinkles in the second support part 50 can be effectively suppressed.

[0100] A transfer device 120 according to a second embodiment of the present invention will be described with reference to Fig. 15. In the transfer device 120 according to the second embodiment, the same components as those in the transfer device 10 according to the first embodiment (see Figs. 1 to 14) are given the same reference symbols, and detailed descriptions of the same components will be omitted, and the same applies hereinafter.

[0101] FIG. 15 is a plan view of the tip of a transfer device 120 according to the second embodiment. In the transfer device 120, the second support body 72 of the second support part 50 has a tapered part 122 tapered toward the tip. The tapered part 122 has a first part 124, a second part 126, and an intermediate part 128. In the tapered part 122, the first part 124, the intermediate part 128, and the second part 126 are provided in this order toward the tip. The first part 124 is a part of the second support body 72 (tapered part 122) including a location of maximum width L1. The second part 126 is a part of the second support body 72 including the tip 102 and the tip edge 106 of the second support part 50. The second part 126 protrudes from the intermediate part 128 toward the tip. The intermediate part 128 is a part between the first part 124 and the second part 126 in the second support body 72. Side edges 130 on both sides of the width direction (arrow W direction) of the middle portion 128 are recessed inward in the width direction. Each side edge 130 is recessed inward in the width direction toward the tip. Therefore, the length of the second portion 126 in the width direction is shorter than the length of the first portion 124 in the width direction.

[0102] The effects of the second embodiment will be described. In the second embodiment, the tapered portion 122 has a first portion 124, an intermediate portion 128, and a second portion 126, and both side edges 130 of the intermediate portion 128 are recessed inward in the width direction. This makes it possible to easily reduce the contact area between the second support surface 74 and the medical sheet 300 at the tapered portion 122.

[0103] A delivery device 140 according to a third embodiment of the present invention will now be described with reference to FIG.

[0104] 16 is a perspective view of the tip of a transportation device 140 according to the third embodiment. In the transportation device 140, the center in the width direction (the direction of the arrow W shown in FIGS. 3 and 15) of the second support part 50 is bent or curved toward the first support part 26. More specifically, of the second support part 50, the center in the width direction of the second support main body 72 is bent or curved toward the first support part 26.

[0105] 16 illustrates a case in which the center portion in the width direction of the second support body 72 is bent toward the first support portion 26. A fold 142 is formed in the center portion in the width direction of the second support body 72 along the axial direction of the second shaft 48. The fold 142 is formed in the second support body 72 between the base end portion of the second support body 72 and the center portion in the axial direction of the second shaft 48. As a result, the center portion in the width direction of the second support body 72 is bent toward the first support portion 26.

[0106] Therefore, when the first support portion 26 and the second support portion 50 are both housed within the outer tube 22 in the first position, the second support portion 50 is housed within the outer tube 22 in a circularly curved and deformed state around the bent or curved central portion (see Figure 10).

[0107] Furthermore, the portion of the second supporting surface 74 between the portion that bends or curves toward the first supporting portion 26 and the tip 102 of the second supporting portion 50 is a flat surface 144. In Fig. 16, the tip portion of the second supporting surface 74 is the flat surface 144. In the third embodiment, the medical sheet 300 is supported on the flat surface 144 of the second supporting surface 74.

[0108] In the third embodiment, the second support body 72 of the second support portion 50 has a tapered portion 146 that tapers toward the tip end.

[0109] The effects of the third embodiment will be described.

[0110] In the third embodiment, the center portion in the width direction of the second support portion 50 is bent or curved toward the first support portion 26. This allows the second support portion 50 to be easily curved into a circular shape around the bent or curved center portion at the first position and accommodated in the outer tube 22 (see FIG. 10). As a result, when the second support portion 50 is accommodated in the outer tube 22, the occurrence of wrinkles in the second support portion 50 can be effectively suppressed.

[0111] In addition, since the portion of the second support surface 74 between the point where it bends or curves toward the first support portion 26 and the tip 102 of the second support portion 50 is a flat surface 144, it is easier to support the medical sheet 300 on the flat surface 144.

[0112] A transportation device 160 according to a fourth embodiment of the present invention will be described with reference to FIGS.

[0113] 17 is a perspective view of the tip of a transfer device 160 according to the fourth embodiment. In the transfer device 160, the bottom surface 162 of the second support part 50 facing the first support surface 261 serves as the second support surface 164. In the transfer device 160, the medical sheet 300 is supported between the first support surface 261 and the second support surface 164. That is, the medical sheet 300 is supported in a state where it is sandwiched vertically between the first support part 26 and the second support part 50. Therefore, the carrier holding part 54 presses the medical sheet 300 in the tip direction with a portion of the pressing surface 58 that is lower than the second support part 50.

[0114] The second support portion 50 has a bent portion 166. The bent portion 166 is a tip portion of the second support portion 50. The bent portion 166 includes the tip 102 of the second support portion 50. The bent portion 166 is formed by bending the tip portion of the second support portion 50 in a direction (upward) away from the first support surface 261. It is desirable that the bent portion 166 is bent upward at an arbitrary angle (for example, an angle in the range of 10° to 60°) with respect to the second support main body 72.

[0115] In addition, in the transfer device 160, the second support body 72 of the second support part 50 has a tapered part 168. The tapered part 168 has the same configuration as the tapered part 100 (see FIG. 1) except that it includes a bent part 166.

[0116] Regarding the transfer method in the fourth embodiment, differences from the first embodiment (see Figs. 1 to 14) will be described.

[0117] In the sheet placement step (step S2 in FIG. 6), the user lifts the folding portion 166 upward with tweezers (not shown) or the like. By lifting the folding portion 166 upward, the second support body 72 curves upward with the second joint portion 70 as a fulcrum. As a result, a gap is formed between the first support surface 261 and the second support surface 164. The user inserts the medical sheet 300 into the formed gap. After inserting the medical sheet 300 into the gap, when the user returns the folding portion 166 to its original position, the medical sheet 300 is supported by the first support surface 261 and the second support surface 164.

[0118] In the accommodation step (step S3 in FIG. 6), as shown in FIG. 18, when the first support part 26 and the second support part 50 are both accommodated within the outer tube 22 at the first position, the second support part 50 is disposed below the free ends of the first protrusions 38 within the outer tube 22. At this time, the first support part 26 and the second support part 50 are accommodated within the outer tube 22 with the medical sheet 300 sandwiched between them.

[0119] In the unfolding step (step S5 in FIG. 6), the medical sheet 300 is supported by the first support surface 261 and the second support surface 164 in the second position and protrudes from the distal end opening 80 of the outer cylinder 22 in the distal direction.

[0120] 19, in the movement step (step S6 in FIG. 6), when the second carrier member 20 is moved in the distal direction (direction of arrow X1) relative to the first carrier member 18, the carrier holding part 54 presses the medical sheet 300 in the distal direction with the portion of the pressing surface 58 that is lower than the second support part 50, and positions the entire medical sheet 300 in the distal direction beyond the first support part 26. As a result, the medical sheet 300 is moved up to above the transplant target portion 402 of the heart 400.

[0121] The effects of the fourth embodiment will be described.

[0122] As shown in Figure 17, when the second shaft 48 is moved along the first shaft 24 with the medical sheet 300 supported between the first support surface 261 and the second support surface 164, the medical sheet 300 is pressed toward the tip by the carrier holding portion 54 (pressing portion), so that the medical sheet 300 can be efficiently transported to the transplant target area 402 (treatment target area).

[0123] Furthermore, because the medical sheet 300 is supported in the up-down direction by the first supporting surface 261 and the second supporting surface 164, the medical sheet 300 can be transferred to the transplantation target site 402 while suppressing the occurrence of wrinkles in the medical sheet 300. As a result, when placing the medical sheet 300 in the transplantation target site 402 located in a narrow space within a living body, the medical sheet 300 can be transferred and placed in the transplantation target site 402 without using a support member such as forceps, and while suppressing the occurrence of wrinkles and damage.

[0124] By lifting the folding portion 166 in a direction (upward) away from the first supporting surface 261, the second supporting portion 50 can be easily curved in a direction (upward) away from the first supporting surface 261. This forms a gap between the first supporting surface 261 and the second supporting surface 164, so that the medical sheet 300 can be easily positioned between the first supporting surface 261 and the second supporting surface 164.

[0125] A delivery device 180 according to a fifth embodiment of the present invention will now be described with reference to FIG.

[0126] FIG. 20 is a perspective view of a tip portion of a transferring device 180 according to the fifth embodiment. The transferring device 180 according to the fifth embodiment differs from the transferring device 160 according to the fourth embodiment (see FIGS. 17 to 19) in that the second support part 50 has a protrusion 182 instead of the bent part 166. The protrusion 182 is provided on an upper surface 184 of the second support main body 72 of the second support part 50. The protrusion 182 is provided at a tip portion of the upper surface 184 of the second support main body 72. The second support main body 72 has a tapered portion 186. The tapered portion 186 has the same configuration as the tapered portion 100 (see FIG. 1).

[0127] In the fifth embodiment, in the sheet placement step (step S2 in FIG. 6 ), when the user lifts the protrusion 182 upward with tweezers (not shown) or the like, the second support body 72 curves upward with the second joint 70 as a fulcrum. This forms a gap between the first support surface 261 and the second support surface 164, allowing the user to insert the medical sheet 300 into the formed gap. After inserting the medical sheet 300 into the gap, when the user returns the protrusion 182 to its original position, the medical sheet 300 is supported by the first support surface 261 and the second support surface 164.

[0128] The effects of the fifth embodiment will be described. In the fifth embodiment, by lifting the protrusion 182 in a direction (upward) away from the first supporting surface 261, the second supporting part 50 can be easily curved in a direction (upward) away from the first supporting surface 261. As a result, a gap is formed between the first supporting surface 261 and the second supporting surface 164, so that the medical sheet 300 can be easily placed between the first supporting surface 261 and the second supporting surface 164.

[0129] 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]

[0130] 10, 120, 140, 160, 180…transfer equipment 18...First carrier member 20...Second carrier member 24…First shaft 26…First support part 48…Second shaft 50…Second support part 74, 164…Second support surface 261...1st support surface 300…Medical sheets 402... Transplant target part (treatment target part)

Claims

1. A transfer device for transferring a medical sheet to a treatment target part of a living body, a first carrier member including a first shaft and a first support portion provided at a tip portion of the first shaft and having a first support surface; a second carrier member including a second shaft extending along the first shaft and movable along the first shaft, and a second support portion provided at a tip end of the second shaft and having a second support surface smaller than the first support surface; Equipped with the medical sheet is supported by the first support surface and the second support surface, The second support portion has a shape that tapers toward a tip end.

2. 2. The transfer device of claim 1, the second support portion has a tapered portion tapered in the tip direction between a maximum width point in a width direction of the second support portion perpendicular to an axial direction of the second shaft and a tip of the second support portion, A delivery device, wherein L2 is greater than or equal to 50% of L1, where L1 is the maximum width and L2 is the length of the tapered portion in the axial direction.

3. 3. The transfer device of claim 2, The tapered portion has linear side edges on both sides in the width direction, A transfer device, wherein the distance between the side edges on both sides in the width direction becomes shorter toward the tip of the second support portion.

4. 3. The transfer device of claim 2, the tapered portion has a first portion including the maximum width point, a second portion including a tip of the second support portion, and an intermediate portion between the first portion and the second portion, A transfer device, wherein the intermediate portion has both side edges in the width direction that are recessed inward in the width direction.

5. A transfer device according to any one of claims 1 to 4, A transfer device, wherein a leading edge of the second support portion is formed in an arc shape.

6. A transfer device according to any one of claims 1 to 4, The medical sheet is supported on the second support surface.

7. A transfer device according to any one of claims 1 to 4, The second carrier member further includes a pressing portion provided at a tip end of the second shaft, The second support portion is fixed to the pressing portion, the first support surface is an upper surface of the first support portion, the second support surface is a bottom surface of the second support portion facing the first support surface, the medical sheet is supported between the first support surface and the second support surface; The pressing portion is capable of pressing the medical sheet supported between the first support surface and the second support surface toward the distal end.

8. 8. The transfer device of claim 7, A transfer device, wherein the second support portion has a bent portion formed by bending a part of the second support portion including a tip of the second support portion in a direction away from the first support surface.

9. 8. The transfer device of claim 7, A transfer device, wherein the second support portion has a protrusion provided on an upper surface opposite the second support surface.

10. A transfer device according to any one of claims 1 to 4, Further comprising an outer cylinder having a tip opening; the first shaft and the second shaft are movable along the outer cylinder within the outer cylinder, at a first position obtained by moving the first shaft and the second shaft in a proximal direction relative to the outer cylinder so that the first support portion and the second support portion are accommodated in the outer cylinder, the first support portion and the second support portion are accommodated in the outer cylinder in a curved and deformed state, A delivery device in which, at a second position where the first shaft and the second shaft are moved in the distal direction relative to the outer tube so that the first support portion and the second support portion protrude from the distal opening, the first support portion and the second support portion are exposed in the distal direction from the outer tube, thereby deploying.

11. 11. The transfer device of claim 10, The second support portion is bent or curved toward the first support portion at a center portion in a width direction of the second support portion perpendicular to an axial direction of the second shaft, A transfer device, wherein in the first position, the second support portion is accommodated within the outer tube in a circularly curved and deformed state around the bent or curved central portion.

12. 12. The transfer device of claim 11, A transfer device, wherein a portion of the second support surface between the point where it bends or curves toward the first support portion and the tip of the second support portion is a flat surface.

Images