Transplant needles, implant loading tools

Abstract

To provide a transplantation needle, a transplantation syringe comprising the transplantation needle, and a transplant loading jig, for improving reproducibility of a transplantation operation by reducing an unnecessary loss of a soft solid transplant while reducing an operation cost as much as possible by enabling anyone to easily and stably perform in a short time both of transplant loading work of positioning the soft solid transplant at a position in the vicinity of a tip opening of the transplantation needle before the transplantation operation and transplant detention work of installing the soft solid transplant in a desired subcutaneous tissue of a body to be transplanted at the time of the transplantation operation.SOLUTION: A transplantation needle comprises a needle trunk part 2 and a needle body part 1. The needle body part includes a blade surface 11, a cut surface formed by obliquely cutting a tip part in a fixed direction with respect to a cylinder shaft. The needle trunk part has a peripheral wall having a wall thickness larger than that of a peripheral wall of the needle body part. On the peripheral wall of the needle trunk part, a transplant loading hole 30 having an upper aperture 31 opening on a peripheral surface and a lower aperture 32 opening on one side of a needle duct 3 is penetratingly formed so as to communicate with the needle duct.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a transplantation needle for transplanting a soft solid transplant into a living body, and a transplant loading device for fixing a transplantation syringe equipped with the transplantation needle and stably loading the transplant. Ingredients Regarding. [Background technology]

[0002] Conventionally, in various facilities such as medical institutions, research facilities, and veterinary clinics, transplant procedures are performed in which grafts consisting of extremely small pieces of approximately 0.1 to 5 mm in size, such as biological tissue masses, drug-releasing capsules, and IC chips for individual identification, are transplanted into the subcutaneous tissue of recipients, such as laboratory animals such as mice and dogs, or humans.

[0003] The most common method of transplantation is the open method, in which the recipient is anesthetized and fixed in a restraint device, a large incision is made in the recipient's epidermis with a scalpel or scissors, tweezers are inserted through the incision to peel away the biological tissue while exposing the desired transplant site, the graft is placed in the transplant site, and finally the incision is closed by suturing with a punch or sutures, thereby transplanting the graft.

[0004] This incision method had problems for the recipient, such as physical pain from the incision of the epidermis, side effects from the anesthetic ingredients, oxidation of internal tissues due to exposure to outside air that entered the body through the incision, and increased physical stress caused by healing the incision, by inadvertently increasing the degree of invasiveness and increasing biological stress.

[0005] In addition, there were problems that increased the burden on the practitioner due to the complexity of the procedure, which requires multiple procedures such as anesthesia, epidermal incision, tissue peeling, recipient insertion, and incision suturing; unstable reproducibility of the procedure depending on the practitioner's level of surgical experience and skill; and high treatment costs due to the need for special surgical instruments such as tweezers and scalpels for each procedure, and drugs such as anesthesia.

[0006] In particular, in clinical trials of drugs using laboratory animals, it is recommended to use a procedure that is as minimally invasive as possible to the animals while taking into consideration animal welfare, and that allows even unskilled personnel to obtain stable clinical results with simple procedures. In other words, in clinical trials, multiple transplant procedures must be performed to assess the effectiveness of multiple recipients as samples, and a procedure method that allows for simple and stable transplantation in a short period of time is required.

[0007] In light of this background, in recent years, instead of the incision type, a so-called injection type has been proposed in which a transplant syringe pre-loaded with a graft is used, the tip of the transplant needle of the syringe is inserted into the subcutaneous tissue of the recipient at the desired transplant location, the graft is locally injected and placed in the subcutaneous tissue, and the transplantation of the graft is completed by removing the transplant syringe.

[0008] The basic structure of the transplant syringe used in this injection type comprises a hollow cylindrical syringe, a hollow cylindrical transplant needle that is coaxially arranged at the tip of the syringe and communicates with the syringe space, and a thin rod-shaped plunger that slides between the syringe space and the needle space. The plunger pushes the transplant from the syringe to the transplant needle, enabling it to be extruded from the needle tip opening (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Special Publication No. 2001-513375 Summary of the Invention [Problem to be solved by the invention]

[0010] As mentioned above, there are two types of grafts that are transplanted into recipients: hard solid grafts that have a fixed shape, such as an IC chip, and soft solid grafts that have no fixed shape, such as a mass of biological tissue (hereinafter simply referred to as soft grafts).

[0011] Of these transplants, soft transplants in particular are very difficult to handle, and if an attempt is made to transplant a soft transplant into a recipient using the transplant syringe disclosed in Patent Document 1, there is a risk that a stable transplant procedure cannot be performed.

[0012] That is, when performing a transplantation procedure using the transplantation syringe disclosed in Patent Document 1, it is necessary to perform a pre-procedure transplant loading operation in which a soft transplant is loaded into the syringe in advance. This pre-procedure transplant loading operation is performed by placing the soft transplant at the rear end opening of the syringe, pushing the soft transplant into the syringe space with the plunger, and disposing the soft transplant from the syringe space into the needle space, i.e., in a position near the needle tip opening.

[0013] However, with the above-mentioned conventional transplant syringe, when a soft transplant is subjected to extrusion stress in the direction of advancement by the plunger, the soft transplant is soft and shapeless, and therefore bulges and deforms so as to expand radially outward from the part subjected to the extrusion stress, causing the extrusion stress to be inadvertently dissipated, which may make it difficult to smoothly load the transplant prior to treatment.

[0014] Specifically, the bulging and deformed portion of the soft implant could protrude from the rear end opening of the syringe, and the protruding portion could be crushed and sheared between the edge of the rear opening of the syringe and the tip of the plunger, resulting in damage to the soft implant.

[0015] Even if the soft implant can be inserted into the syringe space from the rear end opening of the syringe by the plunger, the soft implant must be moved from the syringe space to the needle space, where the bulging portion of the soft implant may be subjected to frictional force between the soft implant and the inner circumferential surface and may be inadvertently crimped into engagement with the inner circumferential surface.

[0016] Furthermore, if the plunger is forcibly advanced while the bulging and deformed portion of the soft implant is in pressure engagement with the inner peripheral surface of the syringe, a reaction force in the opposite direction to the extrusion direction will inadvertently occur between the bulging and deformed portion and the pressing portion.

[0017] As a result, not only could the extrusion stress from the plunger not be applied uniformly to the entire implant, but the bulging, deformed portion, which received a reaction force in the opposite direction to the extrusion stress of the plunger, could flow back through the gap between the syringe and the plunger, leak out from the rear end opening of the syringe, or remain within the syringe space, potentially damaging the implant.

[0018] Furthermore, when using the plunger to press the soft graft and move it from the syringe space to near the needle tip opening, the practitioner must perform a delicate push-out sliding operation of the plunger while adjusting the advancement position of the plunger tip so that the graft does not accidentally fly out of the needle tip opening.

[0019] In other words, since the position to which the soft graft is moved by the plunger within the space inside the injection needle cannot be seen from outside the syringe, the current situation is that the push-out sliding operation of the plunger in the graft loading work before the procedure is performed depending on the surgeon's sense based on experience.

[0020] As described above, conventional transplant syringes make the procedure of loading the implant before surgery cumbersome for the surgeon, and require special skills such as mastery through repeated execution of the same procedure, imposing a burden on the surgeon.

[0021] In other words, conventional transplant syringes made it difficult to load the transplant in a stable and quantitative manner, making the procedure unnecessarily complicated and preventing the smooth performance of the original transplant procedure. In addition, there was a risk of unnecessary loss of the soft transplant, which is a rare and finite sample, resulting in unstable reproducibility of the transplant procedure.

[0022] The present invention has been made in consideration of the above circumstances, and provides a transplant needle and a transplant loading device that allow anyone to easily, stably, and quickly perform the procedure of positioning a soft solid graft near the tip opening of a transplant needle before a transplant procedure and the procedure of placing the graft in the desired subcutaneous tissue of a recipient during a transplant procedure, thereby reducing the cost of the procedure as much as possible, eliminating unnecessary loss of the soft solid graft, and improving the reproducibility of the transplant procedure. Ingredients provide. [Means for solving the problem]

[0023] In order to solve the above-mentioned problems, (1) the transplant needle according to the present invention comprises a hollow cylindrical needle body and a hollow cylindrical needle main body that is extended from the tip of the needle body and has a sharp tip, and the needle body and the needle main body are arranged coaxially to connect and communicate a cylindrical hole of the needle main body and a cylindrical hole of the needle body, thereby forming a communicating cylindrical hole. Inner diameter is 0.7~1.5mm The needle body is formed as a needle passage, and the tip of the needle body is cut obliquely in a certain direction relative to the cylindrical axis. ,the Cutting surface The area of ​​the needle tip opening is 3.8 to 6 times the cross-sectional area of ​​the needle duct. The needle body has a peripheral wall that is thicker than the peripheral wall of the needle main body, and the peripheral wall of the needle body has an opening at the peripheral surface. Inner diameter is 2.0mm~4.0mm At the upper opening and one side of the needle passage The needle has a roughly elliptical shape with the major axis in the longitudinal direction of the needle passage. opening The opening area is 0.04 to 0.5 times the opening area of ​​the upper opening. forming an implant loading hole having a lower opening therethrough and communicating with said needle passage; The edge of the lower opening is formed into a tapered portion that is inclined so as to gradually reduce in diameter toward the needle passage, so that when the soft solid graft is pushed out through the lower opening of the graft loading hole to be loaded into the needle passage of the needle body portion, the soft solid graft is pushed out in a state where it is provisionally molded into an elliptical shape along the extension direction of the needle passage by the lower opening. The present invention is characterized by the above.

[0027] Also,( 2 The implant loading tool according to the present invention is Equipped with a transplant needle transplant syringe Soft to Solid implants Loading Used when Implant loading jig And, The transplant needle comprises a hollow cylindrical needle body and a hollow cylindrical needle main body extending from the tip of the needle body and having a sharp tip, the needle body and the needle main body are arranged coaxially with each other to connect and communicate the bore of the needle main body with the bore of the needle body, forming a communicating bore into a needle passage, the tip of the needle main body is obliquely cut in a certain direction with respect to the bore, and the cut surface is a blade surface, the needle body has a circumferential wall thicker than that of the needle main body, and the circumferential wall of the needle body has an upper opening that opens at the circumferential surface and a lower opening that opens on one side of the needle passage, a transplant syringe having a hollow cylindrical syringe with a syringe hole communicating with the needle channel of the transplant needle and a needle attachment part formed at a tip part to allow the transplant needle to be attached and detached; and a pusher inserted into the syringe hole from a base end opening of the syringe for pushing out the solid transplant that has been inserted into the needle channel from the transplant loading hole of the transplant needle, outward from the tip opening of the transplant needle; and the transplant loading jig comprising: The present invention is characterized in that it comprises a support frame having a syringe fixing portion for mounting and fixing the transplant syringe in a lying state with the upper opening of the transplant loading hole facing upward, thereby restricting its forward / backward and left / right movement, and a loading pressure body connected to the support frame for applying a downward pressing force from above the transplant loading hole to the solid transplant placed in the transplant loading hole to load it into the needle channel.

[0028] The implant loading jig according to the present invention is also characterized in the following respects. (3) The support frame is provided with a plunger stopper for restricting the insertion position of the plunger so that the solid transplant loaded into the needle channel of the transplant needle is positioned near the tip opening of the needle body. (4) The syringe fixing portion is composed of a needle fixing shaft for mounting and fixing the transplant needle of the transplant syringe, and a syringe fixing shaft arranged parallel to the needle fixing shaft and fitting correspondingly to the outer peripheral wall of the syringe of the transplant syringe for mounting and fixing the syringe. (5) The loading press body comprises a pivot arm supported on the support frame so as to be rotatable horizontally and having a vertically extending through hole at its tip, a pressure pin loosely fitted into the through hole of the pivot arm and biased downwardly via an elastic body, and adapted to fit into the graft loading hole of the transplant needle, and a pin support body for supporting the pressure pin on the pivot arm and enabling the pressure pin to be pulled upward against the downward biasing force of the elastic body. (6) The tip corner of the pressing pin is tapered, and when the pressing pin is inserted into the implant loading hole, at least a part of the tapered part protrudes into the needle channel of the implant needle. 。 Effect of the Invention

[0029] The present invention According to the transplant needle of the present invention, the needle body is provided with a hollow cylindrical needle body portion and a hollow cylindrical needle main body portion that is extended from the tip of the needle body portion and has a sharp tip. The needle body portion and the needle main body portion are arranged coaxially to connect and communicate the cylindrical hole of the needle main body portion and the cylindrical hole of the needle body portion, thereby forming a communicating cylindrical hole. Inner diameter is 0.7~1.5mm The needle body is formed as a needle passage, and the tip of the needle body is cut obliquely in a certain direction relative to the cylindrical axis. ,the Cutting surface The area of ​​the needle tip opening is 3.8 to 6 times the cross-sectional area of ​​the needle duct. The needle body has a peripheral wall that is thicker than the peripheral wall of the needle main body, and the peripheral wall of the needle body has an opening at the peripheral surface. Inner diameter is 2.0mm~4.0mm At the upper opening and one side of the needle passage The needle has a roughly elliptical shape with the major axis in the longitudinal direction of the needle passage. opening The opening area is 0.04 to 0.5 times the opening area of ​​the upper opening. forming an implant loading hole having a lower opening therethrough and communicating with said needle passage; The edge of the lower opening is formed into a tapered portion that is inclined so as to gradually reduce in diameter toward the needle passage, so that when the soft solid graft is pushed out through the lower opening of the graft loading hole to be loaded into the needle passage of the needle body portion, the soft solid graft is pushed out in a state where it is provisionally molded into an elliptical shape along the extension direction of the needle passage by the lower opening.As a result, the soft graft can be loaded through a graft loading hole provided in the needle body and positioned midway through the needle channel, thereby shortening the distance the soft graft must travel when it is pushed into position near the needle tip opening with a pusher and positioned therein, and reducing as much as possible the effects of sliding friction resistance experienced by the soft graft as it moves. This simplifies the process of loading the graft near the needle tip opening before treatment and prevents inadvertent damage to the soft graft due to sliding, thereby suppressing unnecessary loss of the soft graft.

[0030] Also ,before Since the lower opening of the implant loading hole is formed with a smaller diameter than the upper opening, a soft implant can be temporarily placed in the implant loading hole, which has the effect of facilitating the insertion of an extremely small soft implant into the implant loading hole.

[0032] Also ,before The blade surface is formed so that the opening area of ​​the tip opening of the needle channel is 3.8 to 6 times the cross-sectional area of ​​the needle channel. Therefore, when the transplantation needle is inserted subcutaneously into the recipient's body, the blade surface of the tip of the transplantation needle cuts through the recipient's tissue, making it easy to position the needle tip opening at the targeted transplantation location. The soft graft can be smoothly pushed out from the tip opening on the inside of the blade surface of the needle body with a pusher, ensuring that the graft can be placed at the transplantation location during treatment.

[0040] Also, The present invention According to the transplant loading tool of the above, there is provided a support frame having a syringe fixing portion for mounting and fixing the transplant syringe in a recumbent state with the upper opening of the transplant loading hole facing upward, thereby restricting forward / backward and left / right movement, and a loading pressure body connected to the support frame for applying a downward pressing force from above the transplant loading hole to the solid transplant placed in the transplant loading hole for loading it into the needle channel. Therefore, it is possible to prevent erroneous sticking when loading a soft transplant into the transplant syringe and to stabilize the state in which the transplant syringe is fixed in a recumbent position, and it is possible to perform the transplant loading work before treatment safely, reliably and quickly.

[0041] In other words, since the loading pressure body is pre-positioned to be located above the graft loading hole of the transplant syringe fixed in a recumbent position, the loading pressure body can be simply pushed toward the graft loading hole, thereby enabling the intraductal graft insertion operation to be performed with a single touch, in which the soft graft inserted and placed in the graft loading hole is guided to the middle of the needle duct and securely placed therein.

[0042] Furthermore, the soft graft can be positioned and fixed in the middle of the needle passage while being clamped by the loading press body between the tip of the loading press body and the inner surface of the needle passage facing the tip, which has the effect of enabling stable loading of the graft before treatment with the clamped soft graft reliably subjected to extrusion stress by the pusher.

[0043] Also ,before The support frame is provided with a plunger stopper that regulates the advancement position of the plunger so that the solid graft loaded into the needle channel of the transplant needle is positioned near the tip opening of the needle main body. The plunger stopper regulates the advancement position of the plunger tip during the push-out sliding operation of the plunger, i.e., the advancement position of the core wire tip, so that the soft graft being pushed out by the tip is accurately positioned near the tip opening of the needle main body. This prevents the practitioner from advancing the plunger excessively and inadvertently pushing the loaded soft graft out of the tip opening of the needle main body, and has the effect of allowing anyone to easily load the graft before treatment.

[0044] Also ,before The syringe fixing portion is composed of a needle fixing shaft for mounting and fixing the transplant needle of the transplant syringe, and a syringe fixing shaft that is arranged in parallel to the needle fixing shaft and fits into the outer peripheral wall of the syringe of the transplant syringe to mount and fix the syringe. Therefore, the transplant syringe is fixed at the base end side via a fitting structure between the syringe and the syringe fixing shaft, and is fixed at the tip end side via a mounting structure between the transplant needle and the needle fixing shaft, thereby making it possible to use a transplant loading jig. This has the effect of making the recumbent position of the transplant syringe more stable, thereby improving the ease of use when loading the transplant before surgery.

[0045] Also ,before The loading pressurizing body includes a rotating arm supported rotatably in the horizontal direction on the support frame and having a through hole penetrating in the vertical direction at its tip, a pressing pin loosely fitted into the through hole of the rotating arm and urged downward via an elastic body, corresponding to fit into the graft loading hole of the transplant needle, and a pin support for supporting the pressing pin on the rotating arm and enabling the pressing pin to be pulled upward against the downward urging force of the elastic body. This has the effect that an intraductal graft insertion operation in which an graft inserted and installed in the graft loading hole is pressed and guided into the middle part of the needle duct can be performed accurately and quickly, and the pressing pin is constantly urged downward by the elastic body to firmly fix the position of the soft graft in the middle part of the needle duct, thereby more stably performing the graft loading operation before treatment.

[0046] Also ,before The tip corner of the pressure pin is tapered, and when the pressure pin is inserted into the graft loading hole, at least a part of the tapered portion protrudes into the needle passage of the transplant needle. This has the effect of preventing the tapered portion from engaging with the graft loading hole and the pressure pin from entering the needle passage and inadvertently blocking the needle passage.

[0047] In addition, when the pressing pin is fitted into the graft loading hole via the tapered portion, a part of the tapered portion protrudes into the needle passage, which has the effect of more reliably clamping the soft graft between the tip of the pressing pin and the inner surface of the needle passage facing the tip, thereby ensuring the application of extrusion stress by the pusher.

[0048] In addition, when the pusher is used to slide and push out the soft graft near the needle tip opening, the pusher tip can slide against the tapered surface of the pressing pin, which allows the pusher to slide smoothly. 。 [Brief description of the drawings]

[0049] [Figure 1] FIG. 2 is a perspective view showing the external appearance of the transplant syringe and the implant loading jig in a detachable state according to the present invention. [Diagram 2] FIG. 1 is an exploded perspective view showing the configuration of a transplant syringe according to a first embodiment. [Diagram 3] FIG. 1 is a side cross-sectional view showing the configuration of a transplant syringe according to a first embodiment. [Figure 4] FIG. 2 is an explanatory diagram showing the configuration of a syringe according to the first embodiment. [Diagram 5] FIG. 2 is an explanatory diagram showing a configuration of a push rod according to the first embodiment. [Figure 6] FIG. 2 is an explanatory diagram showing the configuration of a finger-hanging flange according to the first embodiment. [Figure 7] FIG. 2 is an explanatory diagram showing the configuration of a transplant needle according to the first embodiment. [Figure 8] FIG. 1 is an exploded perspective view showing a configuration of an implant loading jig according to a first embodiment. [Figure 9] FIG. 1 is an exploded perspective view showing the configuration of an implant loading jig according to a first embodiment. [Figure 10] FIG. 2 is an exploded perspective view showing the configuration of a loading press body according to the first embodiment. [Figure 11] FIG. 2 is an explanatory diagram showing a state in which the transplant syringe according to the first embodiment is placed and fixed on the transplant loading jig. [Figure 12] FIG. 2 is a schematic explanatory view showing a state in which the implant loading jig according to the first embodiment is used. [Figure 13] FIG. 2 is a schematic explanatory view showing a state in which the implant loading jig according to the first embodiment is used. [Figure 14] FIG. 2 is a schematic explanatory view showing a state in which the implant loading jig according to the first embodiment is used. [Figure 15] FIG. 2 is a schematic explanatory view showing a state in which the transplant syringe according to the first embodiment is used. [Figure 16] FIG. 11 is a side cross-sectional view showing the configuration of a transplant syringe according to a second embodiment. [Figure 17] FIG. 11 is a partially enlarged perspective view showing the configuration of a transplant syringe according to a second embodiment. [Figure 18] FIG. 11 is a perspective view showing the configuration of an implant loading jig according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0050] The gist of the present invention is to provide a transplant needle comprising: a hollow cylindrical needle body; and a hollow cylindrical needle main body extending from the tip of the needle body and having a sharp tip; the needle body and the needle main body are arranged coaxially to connect and communicate the bore of the needle main body with the bore of the needle body, thereby forming a communicating bore into a needle passage; the tip of the needle main body is cut obliquely in a certain direction relative to the bore of the needle body to form a cutting surface into a blade surface; the needle body has a circumferential wall thicker than that of the needle main body; and the circumferential wall of the needle body is formed with a graft loading hole having an upper opening opening at the circumferential surface and a lower opening opening on one side of the needle passage, the graft loading hole penetrating the needle passage so as to communicate with the needle passage, the graft loading hole having an upper opening opening at the circumferential surface and a lower opening opening on one side of the needle passage, the graft loading hole allowing a soft solid graft to be loaded into the needle passage through the graft loading hole.

[0051] The lower opening of the implant loading hole is formed to have a smaller diameter than the upper opening.

[0052] The implant loading hole is characterized in that it is formed near the tip of the needle body. This has the effect of shortening the distance the soft implant must be pushed into position near the opening at the tip of the needle.

[0053] The blade surface is characterized in that the opening area of ​​the tip opening of the needle passage is 3.8 to 6 times the cross-sectional area of ​​the needle passage.

[0054] The present invention also provides a transplant syringe used for transplanting a solid transplant equipped with the above-mentioned transplant needle, characterized in that it comprises a hollow cylindrical syringe having a syringe hole communicating with the needle channel of the transplant needle and having a needle attachment portion formed at its tip to allow the transplant needle to be attached and detached, and a pusher that is inserted into the syringe hole from the base end opening of the syringe and is used to push out the solid transplant that has been loaded into the needle channel from the transplant loading hole of the transplant needle, outward from the tip opening of the transplant needle. This has the effect of enabling a reliable push-out sliding operation of the pusher, which pushes out and moves the soft graft interposed in the middle of the needle channel from the graft loading hole of the transplant needle toward the needle body, i.e., the needle tip opening, with the pusher. In addition, this has the effect of enabling easy cleaning of the syringe after treatment and easy replacement of the transplant needle when it deteriorates over time due to repeated use, thereby reducing treatment costs as much as possible.

[0055] The pusher has an operating portion at its base end that is pressed by the practitioner, and is characterized in that it comprises an extrusion rod that is inserted into the syringe hole, and a core bar that extends from the tip of the extrusion rod, is inserted into the needle passage, and applies pressure to the solid graft loaded into the needle passage as the extrusion rod is pressed. The push-out sliding operation of the push rod can be performed precisely. In other words, the operating part makes it easy to adjust the pushing force of the push rod using the surgeon's fingers, and the advancement position of the push rod, i.e., the advancement position of the push rod and the core metal at its tip, can be finely adjusted, and the extrusion stress caused by the push-out sliding operation of the push rod can be uniformly applied to the soft graft via the core metal, resulting in an effect of stably carrying out the work of loading the graft before the procedure and the work of placing the graft during the procedure.

[0056] Another feature of the present invention is that an elastic body for urging the pusher toward the base end is interposed within the syringe hole, and the pusher rod and the syringe are provided with a regulating means for preventing the pusher from coming off the syringe due to the urging force of the elastic body. When the push rod is pushed and slid to load a graft before a procedure or place a graft during a procedure, the push rod is pressed by a finger through the operating unit against the biasing force of the elastic body, so that the push stress from the core metal can be transmitted to the soft graft. That is, the pushing force of the push rod through the operating unit by the finger can be finely adjusted stepwise by the biasing force of the elastic body, and the advance position of the push rod can be finely adjusted more accurately. After the completion of the graft loading operation before a procedure or the graft placement operation during a procedure, the push rod is slid back to the retreat position by the biasing force of the elastic body, and the insertion state of the push rod in the syringe, i.e., the insertion and installation state of the ultra-fine core metal in the needle channel of the transplant needle, can be maintained by the restricting means, so that the insertion operation of the push rod into the syringe can be omitted.

[0057] The present invention also provides a transplant loading tool used when loading a solid transplant into the above-mentioned transplant syringe, comprising: a support frame having a syringe fixing part for mounting and fixing the transplant syringe in a lying state with the upper opening of the transplant loading hole facing upward, thereby restricting forward / backward and left / right movement; and a loading pressure body connected to the support frame for applying a downward pressing force to the solid transplant placed in the transplant loading hole from above the transplant loading hole to load it into the needle channel.

[0058] The support frame is also characterized by having a plunger stopper that regulates the insertion position of the plunger so that the solid transplant loaded into the needle channel of the transplant needle is positioned near the tip opening of the needle body.

[0059] The syringe fixing portion is characterized in that it is composed of a needle fixing shaft for mounting and fixing the transplant needle of the transplant syringe, and a syringe fixing shaft that is arranged parallel to the needle fixing shaft and fits into the outer peripheral wall of the syringe of the transplant syringe to mount and fix the syringe.

[0060] The loading pressurizing body is further characterized in that it comprises a pivot arm that is supported rotatably in the horizontal direction relative to the support frame and has a vertically penetrating through hole at its tip, a pressure pin that is loosely fitted into the through hole of the pivot arm and is biased downward via an elastic body, and corresponds to be fitted into the transplant loading hole of the transplant needle, and a pin support body that supports the pressure pin on the pivot arm and enables the pressure pin to be pulled upward against the downward biasing force of the elastic body.

[0061] Another feature of the present invention is that the tip corner of the pressure pin is tapered, and when the pressure pin is inserted into the implant loading hole, at least a portion of the tapered portion protrudes into the needle channel of the transplant needle.

[0062] The present invention will be described below in the following order: [1] Overall overview of the transplant syringe and transplant loading tool equipped with the transplant needle according to the present invention, [2] Configuration of the transplant syringe according to the first embodiment, [3] Configuration of the transplant needle according to the first embodiment, [4] Configuration of the transplant loading tool according to the first embodiment, [5] Explanation of how to use the transplant loading tool according to the present invention, and [6] Configuration of the transplant needle, transplant syringe, and transplant loading tool according to the second embodiment. In the following description, the transplant needle is used as a reference and the side with the needle main body part along the axial direction of the needle channel is referred to as the "tip side" or "front side", the side with the needle body part is referred to as the "base side" or "rear side", the side with the upper opening of the transplant loading hole along the axial direction of the transplant loading hole is referred to as the "upper side" or "flat side", the opposite side with the lower opening is referred to as the "lower side" or "bottom side", and the sides perpendicular to the axial direction of the needle channel of the transplant needle and perpendicular to the axial direction of the transplant loading hole are referred to as the "left and right sides".

[0063] [1] Overview of the transplant syringe and transplant loading tool equipped with the transplant needle according to the present invention Hereinafter, examples of the transplant needle, the transplant syringe equipped with the transplant needle, and the transplant loading jig according to the present invention will be described with reference to the drawings. Figures 1(a) and 1(b) are external perspective views showing the attached and detached state of the transplant syringe and the transplant loading jig, Figure 2 is an exploded perspective view showing the configuration of the transplant syringe, and Figures 12 to 15 are schematic explanatory views showing the use state of the transplant loading jig.

[0064] The transplant needle A1 and the syringe body B10 are fitted together as shown in Figures 1(a) and 2 to form the transplant syringe B1, which is configured to be detachably attached to the transplant loading jig C1 as shown in Figures 1(a) and 1(b).

[0065] The transplant needle A1 attached to the tip of the transplant syringe B1 has a transplant loading hole 30 communicating with the needle duct 3, and a soft transplant inserted into the transplant loading hole 30 can be loaded into the transplant needle A1 of the transplant syringe B1 by the loading pressure body 9 of the transplant loading tool C1.

[0066] The soft implant G loaded into the implant syringe B1 is a very small piece as shown in Figures 12 to 15, and includes, for example, a mass of biological tissue such as tumor cells or tumor tissue, as well as hard solid implants such as sustained drug release capsules and IC chips for individual identification encapsulated in a soft material such as a bioabsorbable polymer.

[0067] The shape of the soft implant G is not particularly limited as long as it can be loaded into the needle channel of the implant needle A1 through the implant loading hole 30, but an approximately spherical or approximately rectangular shape is preferable.

[0068] The size of the soft implant G need only be such that it has an outer diameter that allows it to be loaded into the needle channel of the implant needle A1 through the implant loading hole 30, for example an outer diameter of approximately 0.1 to 5 mm. If it is a mass of biological tissue, it is prepared by cutting it into a predetermined shape with an outer diameter of approximately 1 to 2 mm using dissection scissors or the like.

[0069] The recipient H for which the syringe B1 is used is a living body such as a mouse, a dog, or other laboratory animal, or a human, depending on the purpose of the transplantation. That is, the recipient H (a mouse in this embodiment) is transplanted by injecting a soft graft G into the subcutaneous tissue with the syringe B1 by an injection-type treatment method as shown in FIG.

[0070] When loading a soft graft G into a transplant syringe B1 prior to the transplant procedure, the practitioner attaches a transplant needle A1 having a graft loading hole 30 to the tip of the syringe 4 of the syringe body B10 as shown in Figures 1(a) to 2, and then places and fixes the assembled transplant syringe B1 on a transplant loading jig C1.

[0071] Then, as shown in Figure 12(a), a soft graft G is inserted with tweezers or the like into the graft loading hole 30 of the transplant syringe B1 which is mounted and fixed on the transplant loading tool C1. Next, as shown in Figures 12(b) and 13, the soft graft G is pushed into the needle channel 3 of the transplant needle A1 via the loading pressure body 9 of the transplant loading tool C1. Next, as shown in Figures 14(a) and 14(b), an extrusion slide operation is performed in which the pusher 5 on the rear end of the transplant syringe B1 is pushed forward, thereby positioning the soft graft G in the vicinity of the needle tip opening 10 of the transplant needle A1.

[0072] In this way, the transplant needle A1, transplant syringe B1, and transplant loading tool C1 of the present invention provide a new, orderly and simplified method of loading the soft transplant G prior to transplantation, which was previously complicated and difficult in injection-type transplantation procedures.

[0073] In other words, the transplant needle A1, transplant syringe B1, and transplant loading tool C1 of the present invention each have a unit structure constructed in a special corresponding relationship that allows anyone to easily load the transplant before the procedure, and it can be said to be a long-awaited and revolutionary transplant procedure kit for the medical industry.

[0074] [2] Configuration of the transplant syringe according to the first embodiment Next, the configuration of the transplantation syringe according to the first embodiment will be described in detail with reference to the drawings. Fig. 3 is a side cross-sectional view showing the configuration of the transplantation syringe, Fig. 4(a) and Fig. 4(b) are a side view and a side cross-sectional view, respectively, showing the configuration of the syringe, Fig. 5(a) to Fig. 5(c) are a side view, a side cross-sectional view and a bottom view, respectively, showing the configuration of the extrusion rod, and Fig. 6(a) to Fig. 6(c) are a side view, a front view and a side cross-sectional view, respectively, showing the configuration of the finger hook flange.

[0075] As shown in Figures 2 and 3, the transplant syringe B1 comprises a hollow cylindrical syringe 4 having a syringe hole 6 communicating with the needle channel 3 of the transplant needle A1 described later and a needle attachment portion 40 formed at its tip to allow the transplant needle A1 to be attached and detached, and a pusher 5 which is inserted into the syringe hole 6 from the base end opening 4b of the syringe 4 and used to push out the soft transplant G which has been loaded into the needle channel 3 from the transplant loading hole 30 of the transplant needle A1, outward from the tip opening of the transplant needle A1.

[0076] The pusher 5 is configured so that, in the axial direction of the transplant syringe B1, when at the most retracted position located at the most base end, the tip is positioned baseward of the graft loading hole 30 of the transplant needle A1, and when at the most advanced position located at the most forward end, the tip is exposed outward from the needle tip opening 10 of the transplant needle A1.

[0077] As shown in Figures 2 and 3, the pusher 5 has an operating section 51 at the base end side that is pressed by the practitioner, and is composed of an extrusion rod 50 that is inserted into the syringe hole 6, and a core bar 52 that extends from the tip of the extrusion rod 50, is inserted into the needle channel 3, and applies pressure to the soft graft G loaded into the needle channel 3 as the extrusion rod 50 is pressed.

[0078] As shown in Figures 5(a) to 5(c), the extrusion rod 50 is generally rod-shaped and T-shaped in side cross section, with the body portion corresponding to the vertical side of the T being the rod body portion 50a that is inserted into the syringe hole 6, and the base end portion corresponding to the horizontal side of the T being formed into the operating portion 51 by an enlarged ring that protrudes radially outward from the base end of the rod body portion 50a.

[0079] The operating part 51 at the base end of the push rod 50 has front and rear faces 51aF, 51aB of the diameter expansion ring formed as flat faces perpendicular to the axial direction of the push rod 50. The tip face 50c of the push rod 50 is also formed as a flat face perpendicular to the axial direction, and has a core metal fixing hole 50b formed in the center for inserting and fixing the base end of the core metal 52.

[0080] The core wire 52 is a thin, elongated metal rod having a predetermined length as shown in Figures 2 and 3, and is formed with an outer diameter approximately the same as the inner diameter of the needle passage 3 of the transplant needle A1. It is positioned coaxially with the extrusion rod 50 via the core wire fixing hole 50b of the extrusion rod 50.

[0081] The extension length of the core wire 52 from the tip surface of the extrusion rod 50 is set to a length such that when the extrusion rod 50 is pushed to its most advanced position as shown in Figure 15, the tip of the core wire 52 is exposed outward at least from the needle tip opening 10 of the transplant needle A1.

[0082] As shown in Figures 4(a) and 4(b), the syringe 4 is an elongated cylindrical body having a thick peripheral wall, and the internal space of the cylinder is a syringe hole 6 having a cylinder axis along the extension direction of the syringe 4, and is formed, for example, from a metal cylinder.

[0083] 2, 4(a) and 4(b), the base end of the syringe 4 is formed into a flange attachment portion 42 for externally fitting and fixing a finger flange 41 by cutting out the outer circumferential surface radially inward along the periphery. The flange attachment portion 42 is formed into a thin peripheral wall having a smaller diameter than the outer diameter of the barrel of the syringe 4.

[0084] As shown in FIGS. 6(a) and 6(b), the finger-hanging flange 41 is a generally elliptical ring having a predetermined thickness when viewed from the front, and has a fitting hole 41a formed in the center thereof for fitting onto the flange mounting portion 42.

[0085] In addition, a locking pin hole 41b is formed through the center of the lower part of the finger hook flange 41 for inserting a rod guide pin 54b described later, as shown in Figure 6 (c), and the locking pin hole 41b is connected to the fitting hole 41a.

[0086] In addition, as shown in Figures 4(a) and 4(b), a shaft fitting recess 43 is formed on the lower outer periphery of the base end half of the syringe 4, which fits into a syringe fixing shaft 81 of the transplant loading tool C1 described later.

[0087] The shaft fitting recess 43 is formed by cutting the outer circumferential bottom surface of the syringe 4 into a substantially semi-cylindrical shape along the tangential direction of the syringe, so that the bottom surface 43a is a flat surface parallel to the tangential direction.

[0088] As shown in FIG. 4(b), the syringe hole 6 is formed by a partition step 60 that separates approximately the center of the longitudinal base end half of the space inside the syringe, with the base end hole serving as a rod insertion hole 61 and the tip end hole serving as a needle fitting hole 62 that forms the needle attachment portion 40 at the tip of the syringe 4, and the rod insertion hole 61 and the needle fitting hole 62 communicating with each other via a core wire insertion hole 63 formed through the center of the partition step 60.

[0089] In other words, the syringe hole 6 is formed by arranging the rod insertion hole 61, the core wire insertion hole 63, and the needle fitting hole 62 in order from the base end to the tip end of the syringe 4, and by arranging their respective axes coaxially so as to coincide with the cylindrical axis of the syringe 4 and communicate with each other.

[0090] The rod insertion hole 61 corresponds to most of the syringe hole 6, and is a long hole that is open on the base end side and surrounded by the rear side surface of the partition step portion 60 and the inner circumferential surface on the base end side of the syringe 4. The rod insertion hole 61 has an inner diameter that allows the pusher rod 50 to slide inside.

[0091] The base end opening 4b of the rod insertion hole 61 functions as an insertion port for the push-out rod 50 as shown in Figures 4(a) and 4(b), and the inner edge of the opening is formed into a tapered section that gradually widens from the tip side to the base end side in the axial direction, making it easier to insert the push-out rod 50 into the rod insertion hole 61.

[0092] The needle fitting hole 62 corresponds to the tip portion of the syringe hole 6, and is a short hole open at the tip side surrounded by the front side surface of the partition step portion 60 and the inner peripheral surface of the tip portion of the syringe 4. The needle fitting hole 62 has an inner diameter that allows the base portion of the needle body portion 2 of the transplant needle A1, which will be described later, to be inserted therein, and constitutes the needle attachment portion 40.

[0093] The tip opening 4a of the needle fitting hole 62 functions as an insertion port for the base of the transplant needle A1, and the inner edge of the opening is formed into a tapered section that gradually widens from the base end side to the tip end side in the axial direction, making it easier to insert the base of the transplant needle A1 into the needle fitting hole 62.

[0094] In addition, the partition step 60 is a flat plate having a predetermined thickness, and within the syringe hole 6, its front and rear side surfaces are formed as flat surfaces perpendicular to the axial direction of the syringe 4, and it is interposed between the rod insertion hole 61 and the needle fitting hole 62.

[0095] The base end side surface (front side surface) of the partition step portion 60 functions as a regulating surface against which the tip end surface of the pusher rod 50 abuts to regulate the maximum advanced position of the pusher 5. In addition, the tip end side surface (rear side surface) of the partition step portion 60 functions as a fitting bottom surface against which the base end surface of the needle body portion 2 of the transplantation needle A1 abuts to stabilize the fitted state of the transplantation needle A1 fitted into the needle fitting hole 62.

[0096] The core bar insertion hole 63 is formed by penetrating the center of the plate surface of the partition step portion 60, and its axis is coaxial with the axis of the needle passage 3 of the transplantation needle A1 attached to the needle attachment portion 40, so that it communicates with the needle passage 3. The inner diameter of the core bar insertion hole 63 only needs to be an inner diameter that allows the core bar 52 to be inserted therethrough, and is set to be equal to or larger than the outer diameter of the core bar 52.

[0097] In addition, an elastic body 53 for urging the plunger 5 toward the base end is provided within the syringe hole 6 as shown in FIG. 3, and a restricting means 54 for preventing the plunger 5 from coming off the syringe 4 due to the urging force of the elastic body 53 is provided between the pusher rod 50 and the syringe 4.

[0098] The elastic body 53 is a so-called compression coil spring, which is inserted into the rod insertion hole 61 as shown in FIG. 3 and disposed between the partition step portion 60 and the extrusion rod 50, and constantly urges the extrusion rod 50 outward toward the base end of the syringe 4.

[0099] As shown in Figures 3 to 5(c), the regulating means 54 is formed through the lower peripheral wall of the base end (flange mounting portion 42) of the syringe 4 and is composed of a rod guide pin hole 54a that communicates with the rod insertion hole 61, a rod guide pin 54b that exposes the pin tip portion within the rod insertion hole 61 when inserted into the rod guide pin hole 54a, and a rod guide groove 54c that is formed extending along the longitudinal direction at the lower portion of the extrusion rod 50 and into which the pin tip portion of the rod guide pin 54b fits.

[0100] As shown in Figure 4(b), the rod guide pin hole 54a opens into the outer peripheral wall of the syringe 4 and extends perpendicular to the axial direction of the syringe 4, penetrating the peripheral wall of the syringe 4, thereby communicating perpendicularly to the rod insertion hole 61 from one side.

[0101] 3, the rod guide pin 54b is formed to a length such that, when the push rod 50 is inserted into the rod insertion hole 61 and then into the rod guide pin hole 54a, the pin tip exposed from the rod guide pin hole 54a to the rod insertion hole 61 is not in contact with the outer circumferential surface of the push rod 50. Note that the rod guide pin 54b in this embodiment employs a knurled screw.

[0102] As shown in FIG. 3, rod guide pin 54b is fixed to syringe 4 via rod guide pin hole 54a, and performs a pusher regulating function that determines the most advanced or most retracted position of pusher 5 inserted into syringe hole 6, as well as a flange fixing function that fixes finger hook flange 41 to flange mounting portion 42 of syringe 4.

[0103] Specifically, the rod guide pin 54b is inserted into a communication hole that is arranged coaxially between the locking pin hole 41b of the finger hook flange 41 and the rod guide pin hole 54a of the flange attachment portion 42, and is formed so that the pin tip is exposed in the rod insertion hole 61 and the pin tip surface has a length that does not interfere with the push rod 50. In other words, the rod guide groove 54c has a depth that forms a certain gap between the groove top surface 54cU and the pin tip exposed in the rod insertion hole 61.

[0104] As shown in Figs. 5(a) to 5(c), the rod guide groove 54c is formed by recessing the outer circumferential bottom surface of the rod body portion 50a of the push rod 50 upward in the axial direction into a generally elongated rectangular parallelepiped shape.

[0105] Specifically, the rod guide groove 54c is an approximately rectangular groove space surrounded by a flat groove top surface 54cU that is parallel to the axial direction in a side view as shown in Figure 5(b), long, straight left and right side walls 54cL, 54cR that are parallel to the axial direction in a plan view as shown in Figure 5(c), and semicircular front and rear end side walls 54cF, 54cB that follow the outer periphery of the pin tip of the rod guide pin 54b, and is formed to be able to accommodate the pin tip of the rod guide pin 54b that protrudes upward within the syringe bore 6 from the rod guide pin hole 54a.

[0106] As a result, as the push rod 5 is pushed out and slid, the left and right side walls 54cL, 54cR of the rod guide groove 54c of the push rod 50 slide against the left and right outer periphery of the pin tip, restricting inadvertent rotation of the push rod 5 around its axis and stabilizing the push rod 5's push-out sliding operation.

[0107] In addition, when the pusher 5 is returned to the base end side by the biasing force of the elastic body 53, the rear end side wall 54cB of the rod guide groove 54c of the pusher rod 50 abuts and engages with the front outer periphery of the tip of the pin, positioning the tip 52a of the core metal 52 rearward of the lower opening 32 of the graft loading hole 30 within the needle channel 3 of the transplant needle A1 and opening the lower opening 32.

[0108] On the other hand, when the pusher 5 is pushed toward the tip against the biasing force of the elastic body 53, the front end side wall 54cF of the rod guide groove 54c of the pusher rod 50 abuts and engages with the rear outer periphery of the pin tip, or the front end face of the pusher rod 50 abuts and engages with the rear side surface of the partition step 60 via the contracted elastic body 53, positioning the tip portion 52a of the core bar 52 forward of the lower opening 32 of the graft loading hole 30 within the needle channel 3 of the transplant needle A1 and blocking the lower opening 32, resulting in the tip portion 52a of the core bar 52 protruding outward from the needle tip opening 10 of the transplant needle A1.

[0109] In other words, the axial length of the rod guide groove 54c (the distance in the axial direction between the front end side wall 54cF and the rear end side wall 54cB) is formed to be greater than or equal to the movement distance of the pusher 5 (the distance between the front end face of the pusher rod 50 and the rear side face of the elastic body 53 in a contracted state).

[0110] In other words, the positions at which the front end side wall 54cF and the rear end side wall 54cB of the extrusion rod 50 are formed are determined by the relative positional relationship between the position of the implant loading hole 30 (lower opening 32) of the transplant needle A1 in the axial direction of the transplant syringe B1 and the moving position of the tip portion 52a associated with the advancement and withdrawal displacement of the pusher 5.

[0111] In addition, a needle locking pin hole 40a is formed through the lower part of the peripheral wall at the tip of the syringe 4, and corresponds to the insertion of a needle locking pin 40b which presses against the outer periphery of the base of the transplant needle A1 fitted into the needle fitting hole 62 to fix the transplant needle A1 to the syringe body B10, as shown in Figures 3 to 4(b).

[0112] As shown in Figure 4 (b), the needle locking pin hole 40a opens into the peripheral wall of the syringe 4 and extends perpendicular to the axial direction of the syringe 4, penetrating the peripheral wall of the syringe 4, thereby communicating perpendicularly with the needle fitting hole 62 from one side.

[0113] As a result, by inserting the needle locking pin 40b into the needle locking pin hole 40a with the transplant needle A1 fitted into the needle fitting hole 62 as shown in Figure 3, the tip of the needle locking pin 40b engages with part of the outer periphery of the base of the transplant needle A1 and presses the needle body portion 2 in a direction perpendicular to the axial direction, so that the outer periphery of the needle body portion 2 opposite the pressed portion is pressed against the inner periphery of the syringe 4, making it possible to engage the transplant needle A1 with the syringe 4.

[0114] In this embodiment, the needle locking pin 40b uses a knurled screw, but it may be any pin that is fixed within the needle fitting hole 62 and presses the needle body 2 of the transplant needle A with the tip of the pin, thereby realizing a crimped engagement state between the inner surface of the syringe 4 and the outer surface of the needle body 2. For example, the needle locking pin may be a press-fit pin that has an outer diameter slightly larger than the inner diameter of the needle fitting hole 62 and is inserted and fixed within the same hole.

[0115] Thus, the needle attachment part 40 is composed of a needle fitting hole 62 that fits into the base of the transplant needle A1, a needle locking pin hole 40a that extends perpendicularly from one side of the needle fitting hole 62 to the axis of the needle fitting hole 62 and communicates with the needle fitting hole 62, and a needle locking pin 40b that is inserted into the needle locking pin hole 40a and engages with a part of the outer periphery of the base of the transplant needle A1 that is fitted into the needle fitting hole 62. This makes it possible to mount and engage the transplant needle A1 integrally with the syringe main body B10 to assemble it into the transplant syringe B1.

[0116] Furthermore, the needle locking pin hole 40a is formed at the same circumferential position as the rod guide pin hole 54a is formed in the peripheral wall of the syringe 4. In other words, the needle locking pin hole 40a, the rod guide pin hole 54a, and the shaft fitting recess 43 are each arranged in the same circumferential phase around the axis when viewed in the axial direction of the syringe 4.

[0117] Specifically, the needle locking pin hole 40a, the rod guide pin hole 54a, and the shaft fitting recess 43 are formed in the peripheral wall of the syringe 4 at predetermined positions along the axis of the syringe 4 on one side (lower side) along the axis of the syringe 4 as shown in FIG.

[0118] As a result, when the transplant syringe B1 is fixed by fitting the shaft fitting recess 43 onto the syringe fixing shaft 81 of the transplant loading tool C1 described later, the heads of the needle locking pin 40b and the rod guide pin 54b, which are inserted into the needle locking pin hole 40a and the rod guide pin hole 54a, respectively, are positioned downward, preventing inadvertent interference during the transplant loading operation.

[0119] In addition, the transplant syringe B1 has its center of gravity offset toward the tip side in the axial direction. Specifically, the thickness of the peripheral wall of the needle fitting hole 62 on the tip side of the syringe 4 is made thicker than the thickness of the peripheral wall of the rod insertion hole 61 on the base end side of the syringe 4, and the center of gravity is offset toward the tip side of the syringe 4 by a partition step 60 provided in the approximate center of the longitudinal base end side half that separates the needle fitting hole 62 and the rod insertion hole 61.

[0120] As a result, when the practitioner grips the transplant syringe B1 at the outer periphery of the base end of the syringe 4, the transplant needle A1 at the tip inevitably faces downward because the center of gravity is on the tip side, which stabilizes the gripping posture of the transplant syringe B1, improves operability in the tip direction of the transplant needle A1, and makes it possible to prevent accidental sticking.

[0121] The center of gravity of the transplant syringe B1 may be offset toward the tip in the axial direction by forming the syringe 4 from a heavy material and forming the plunger 5 of the syringe 4 from a lightweight material. An example of a heavy material is steel, and an example of a lightweight material is resin. Furthermore, by forming the transplant needle A1 attached to the tip of the syringe 4 from a heavy material, such as steel, like the syringe 4, the offset toward the tip of the transplant syringe B1 can be made reliable.

[0122] [3] Configuration of the implantation needle according to the first embodiment Next, a specific configuration of the transplantation needle A1 according to the first embodiment will be described. Figures 7(a) to 7(d) are a plan view, a side view, a side cross-sectional view, and a bottom view, respectively, showing the configuration of the transplantation needle.

[0123] As shown in Figures 2, 3, and 7(a) to 7(d), the transplant needle A comprises a hollow cylindrical needle body 2 and a hollow cylindrical needle main body 1 extending from the tip of the needle body 2 and having a sharp tip.

[0124] As shown in Figures 7(b) and 7(c), the needle body 2 and the needle main body 1 are arranged coaxially to connect and communicate the cylindrical bore of the needle main body 1 with the cylindrical bore of the needle body 2, forming a linear communicating cylindrical bore which serves as a needle channel 3 for placing and moving the core wire 52 and the soft implant G.

[0125] The inner diameter of the needle passage 3 (the inner diameter of the needle body portion 2 and the needle main body portion 1) is constant and is not particularly limited as long as it is a size that allows the pusher 5 (core metal 52) to be inserted and the soft graft G to be placed therein, and can be changed appropriately according to the size of the soft graft G to be transplanted, for example, 0.7 to 1.5 mm.

[0126] In addition, the length of the needle channel 3, i.e., the length of the transplant needle A1 (the sum of the length of the needle body portion 2 and the length of the needle main body portion 1), is, for example, approximately 42 to 58 m, in order to reduce as much as possible the influence of the frictional force that the soft transplant G receives from the peripheral wall when it moves within the needle channel 3.

[0127] The needle main body 1 is an approximately thin cylindrical tube having a thin peripheral wall and a sharp tip, and is the part that performs the essential insertion and transplantation function of a transplant needle A1, which cuts through the subcutaneous tissue of the recipient H, positions the needle tip opening 10 at the transplant position, and ejects a soft transplant G from the needle tip opening 10.

[0128] The dimensions of the needle body 1 are not particularly limited as long as the needle tip opening 10 can be positioned at the transplantation site, but for example, the degree of invasiveness to the recipient can be reduced as much as possible by making the outer diameter 1.1 to 1.9 mm, the length 23 to 31 mm, and the peripheral wall thickness 0.2 to 0.6 mm.

[0129] 7(a) to 7(c), the needle body 1 has a sharp tip by cutting the tip at an angle in a certain direction relative to the cylindrical axis to form a blade surface 11. The blade surface 11 at the needle tip corresponds to the edge surface of the opening at the needle tip, and has a needle tip opening 10 that opens the needle duct 3 on the inside.

[0130] The fixed direction in the bevel cutting may be linear or polygonal as long as the uppermost part of the opening edge forming the needle tip opening 10 is located on the base end side and the lowermost part of the opening edge is located on the tip end side in side view. In other words, the needle tip may be cut and formed with a stepped inclination angle within a range of 0° to 90° based on the axis (base surface).

[0131] For example, the blade surface 11 can be formed to have multiple inclined surfaces by gradually changing the rotation angle relative to the cylindrical axis and the inclination angle relative to the base plane of the needle tract in the cutting direction, thereby improving the cutting action of subcutaneous tissue.

[0132] In this case, for example, the needle tip of the needle body 1 can be cut in three stages in sequence from the base end to the tip end of the needle body 1, and formed with a blade surface 11 having three inclined surfaces: the first cut has an inclination angle of 11° to 13° and a rotation angle of 0°, the second cut has an inclination angle of 15° to 16° and a rotation angle of 45°, and the third cut has an inclination angle of 15° to 16° and a rotation angle of 270°.

[0133] In addition, the blade surface 11 is formed so that the opening area of ​​the needle tip opening 10 of the needle passage 3 is 3.8 to 6 times the cross-sectional area of ​​the needle passage 3, making it easy to visually check the needle tip opening side during treatment and enabling the soft implant to be smoothly pushed out by the pusher 5.

[0134] Furthermore, the base of the needle main body 1 is formed into a mortar shape with the peripheral wall gradually thickening from the tip side to the base end side as shown in Figure 7 (c), and is integrally connected to the tip of the needle trunk 2.

[0135] Specifically, the base of the needle body 1 is an expanded-diameter thick section in which the outer diameter gradually expands from the tip to the base end while keeping the inside diameter the same, forming a gently curved outer circumferential surface, and the base end edge of the expanded-diameter thick section is integrally connected to the needle body 2 so as to continue to the tip end edge of the needle body 2, improving the rigidity of the connection portion. In other words, the outside diameter of the base end edge of the needle body 1 is equal to the outside diameter of the needle body 2.

[0136] The needle body 2 is a thick cylindrical tube having a peripheral wall thicker than that of the needle main body 1, and has a graft loading hole 30 in its peripheral wall for inserting a soft graft G into the needle channel 3 of the transplant needle A1, thereby performing the function of introducing the graft and also the needle fixing function of fixing the transplant needle A1 to the syringe body B10.

[0137] The dimensions of the needle body 2 are, for example, an outer diameter of 5.5 to 6.5 mm, a length of 19 to 27 mm, and a peripheral wall thickness of 2.1 to 2.9 mm, so that a transplant loading hole 30 capable of performing the function of introducing a transplant plant can be formed in the peripheral wall and the needle can also perform the function of fixing the needle. In other words, the thickness of the peripheral wall of the needle body 2 is about 0.1 to 15 times, and preferably 5 to 7 times, the thickness of the peripheral wall of the needle main body 1.

[0138] The peripheral wall of the needle body portion 2 has an upper opening 31 formed on the outer peripheral surface and a lower opening 32 formed on the inner peripheral surface of the needle passage 3, and a graft loading hole 30 is formed therethrough, connecting the needle passage 3 to the outside.

[0139] Specifically, the graft loading hole 30 is a long, narrow hole having an approximately cylindrical shape, and penetrates the peripheral wall of the needle body 2 perpendicular to the axial direction of the needle body 2 as shown in Figures 3 and 7(c), thereby forming an upper opening 31 for the transplant on the outer peripheral surface of the needle body 2 and a lower opening 32 on the inner peripheral surface of the tubular hole of the needle body 2, i.e., on one side of the needle passage 3, which joins perpendicularly to the needle passage 3 at a midpoint of the needle passage 3 and communicates with it.

[0140] The implant loading hole 30 is formed near the tip of the needle body 2, that is, near the connection portion with the base of the needle main body 1.

[0141] More specifically, the graft loading hole 30 is formed through the peripheral wall near the tip of the needle barrel 2 with its opening facing the same side (upper side) as the exposed open side of the needle tip opening 10 of the needle main body 1 when viewed in a plane, as shown in Figure 7(a), and the installation direction on the graft loading tool C1 described later is constant.

[0142] This implant loading hole 30 is a hole that serves as an introduction path when inserting the soft implant G into the needle duct 3, and has a constant depth sufficient to allow the soft implant G to be inserted and held inside the hole by the surrounding walls that form the hole.

[0143] In other words, the graft loading hole 30 serves to introduce the soft graft G into the middle part of the needle channel 3 of the transplant needle A1, and also serves as a temporary placement function to keep the soft graft G inserted inside the hole before introduction and temporarily place the soft graft on the transplant needle A1.

[0144] The dimensions of the graft loading hole 30 depend on the desired size of the soft graft G, but in order to fulfill the function of introducing the soft graft G and temporarily placing it in the hole, and also from the standpoint of convenience for the practitioner to place the soft graft into the graft loading hole 30, the dimensions are, for example, an inner diameter of 2.0 mm to 4.0 mm and a length (depth) of 2.1 to 2.9 mm.

[0145] That is, the graft loading hole 30 has an inner diameter larger than that of the needle passage 3 and a length substantially equal to the thickness of the peripheral wall of the needle body portion 2. In this embodiment, the inner diameter of the graft loading hole 30 is approximately 3 to 6 times the inner diameter of the needle passage 3.

[0146] The upper opening 31 of the graft loading hole 30 functions as an inlet for the graft loading hole 30, and opens in a substantially circular shape in a plan view as shown in Fig. 7(a). The opening edge of the graft loading hole 30 is cut out in a circular arc shape downward on the outer circumferential upper surface of the needle body portion 2 in a side view as shown in Fig. 7(b).

[0147] This allows the graft loading hole 30 to be opened widely on the outer circumferential surface of the needle body 2, enlarging the opening area as much as possible, improving visibility by the practitioner and the ease of inserting the soft graft G into the graft loading hole 30. The inner diameter of the upper opening 31 is, for example, 2.0 mm to 4.0 mm.

[0148] The lower opening 32 of the graft loading hole 30 functions as a communication port that connects the graft loading hole 30 to the needle passage 3, and is formed on one side of the middle part of the needle passage 3. The lower opening 32 is formed in a substantially elliptical shape having a smaller opening area than the upper opening 31 in a plan view, as shown in Fig. 7(a).

[0149] Specifically, the lower opening 32 is formed as an elliptical hole in which the long axis of the ellipse is positioned in the same phase above the axis of the needle passage 3 when viewed in a plane, and the short axis of the ellipse is positioned in a perpendicular direction above the axis of the needle passage 3.

[0150] The inner diameter of the lower opening 32 is, for example, 1.0 mm to 2.0 mm in major axis and 0.7 to 1.5 mm in minor axis. In the implant loading hole 30, the opening area of ​​the lower opening 32 is about 0.04 to 0.5 times the opening area of ​​the upper opening 31.

[0151] 7(c) and 13, the opening edge of the lower opening 32 is formed into a tapered portion 33 that is inclined so as to gradually reduce in diameter toward the needle passage 3. Specifically, the tapered portion 33 is formed such that the cross-sectional shape of the lower part of the inner peripheral wall of the graft loading hole 30 changes from a circle to an ellipse from above to below, and the cross-sectional area decreases.

[0152] This allows the soft graft G inserted into the graft loading hole 30 to be temporarily placed on the tapered portion 33 inside the hole. When the soft graft G is pushed out into the needle channel 3 of the needle body 2 through the lower opening 32, the soft graft G is pushed out in a state where it is temporarily molded into an elliptical shape along the extension direction of the needle channel 3 by the lower opening 32, and this facilitates movement along the extension direction of the needle channel 3.

[0153] The base of the needle body 2, specifically approximately the half of the base end side of the needle body 2, serves as a fitting portion that is fitted into the needle fitting hole 62 of the needle attachment portion 40 at the tip of the syringe 4 as described above.

[0154] In addition, at a predetermined position on the outer peripheral surface of approximately the base end half of the needle body portion 2, a pin engagement groove 20 is cut out in a semicircular arc shape in side view so that the pin tip portion of the needle locking pin 40b can fit into and engage with it, as shown in Figures 7(b) to 7(d).

[0155] Specifically, the pin engagement groove 20 is formed on the outer bottom surface of the needle body portion 2 at a position corresponding to the needle locking pin hole 40a of the syringe 4 in the longitudinal direction of the needle body portion 2 when the needle body portion 2 of the transplant needle A1 is inserted into the needle fitting hole 62 of the needle mounting portion 40 at the tip of the syringe 4.

[0156] In addition, the pin engagement groove 20 is formed in the peripheral wall of the needle body portion 2 at a circumferential position opposite to the circumferential position at which the implant loading hole 30 is formed, as shown in Figures 7(b) and 7(c).

[0157] In other words, the pin engagement groove 20 and the transplant loading hole 30 are disposed in opposite phases around the axis when viewed in the axial direction of the needle body 2. Specifically, in the peripheral wall of the needle body 2, the transplant loading hole 30 is formed on one side (upper side) of the axis of the needle channel 3 of the transplant needle A1 when viewed from the side, and the pin engagement groove 20 is formed on the other side (lower side) opposite the same side, at predetermined positions along the axis.

[0158] In addition, the opening edge 21a on the base end side of the needle body portion 2 is formed into a tapered portion that gradually widens the base end opening 21 of the needle channel 3 along the axial direction from the tip side to the base end side, as shown in Figure 7 (c), widening the receiving opening for the tip of the pusher 5 (core metal 52) that moves within the syringe hole 6 when the transplant needle A1 is attached at the tip of the syringe 4, thereby preventing inadvertent interference with the pusher 5 at the connection portion.

[0159] [4] Configuration of the implant loading jig according to the first embodiment Next, the configuration of the implant loading jig according to the first embodiment will be described in detail with reference to the drawings. Figures 8 and 9 are exploded perspective views showing the configuration of the implant loading jig, Figure 10 is an exploded perspective view showing the configuration of the loading presser, and Figures 11(a) and 11(b) are a plan view and a schematic side cross-sectional view, respectively, showing the state in which the implant syringe is placed and fixed on the implant loading jig.

[0160] As shown in Figures 1(a) and 1(b), the graft loading tool C1 comprises a support frame 7 having a syringe fixing part 8 that mounts and fixes the transplant syringe B1 in a lying state with the upper opening 31 of the graft loading hole 30 facing upward, and restricts its forward / backward and left / right movement, and a loading pressure body 9 connected to the support frame 7 and that applies a downward pressing force from above the graft loading hole 30 to the soft graft G placed in the graft loading hole 30 to load it into the needle channel 3.

[0161] The support frame 7 is a rectangular frame body in a plan view, and functions as a mounting and fixing base for the transplant syringe B1, and includes left and right frame portions 70L, 70R each having a long, substantially strip-like shape and a predetermined thickness, and front and rear frame portions 71F, 71B each having a short, substantially strip-like shape and a predetermined thickness, as shown in Fig. 8. A syringe fixing portion 8 is provided on the inside of the support frame 7.

[0162] Specifically, the support frame 7 is constructed by arranging the left and right frame portions 70L, 70R in parallel with each other at a fixed distance and with their strip surfaces facing each other, and by arranging the front and rear frame portions 71F, 71B in parallel with each other between the front and rear end portions of the left and right frame portions 70L, 70R with their strip surfaces facing each other, and fixing each of them via bolts 75.

[0163] The length of the support frame 7, ie, the distance between the front and rear frame portions 71F, 71B, is set to be longer than the sum of the length of the syringe 4 of the transplantation injector B1 and the length of the transplantation needle A1.

[0164] Furthermore, the width of the support frame 7, ie, the distance between the left and right frame portions 70L, 70R, is made longer than the width of the finger flange 41, which is the maximum width of the transplant syringe B1.

[0165] That is, as shown in Figures 11(a) and 11(b), the support frame 7 is configured so that when the transplant syringe B1 is placed and fixed in a horizontal position on the syringe fixing portion 8 inside the frame along the longitudinal direction of the frame, the needle tip portion of the transplant needle A1 is positioned on the front frame portion 71F, and the base end portion (operating portion 51) of the pusher 5 in the most retracted position is positioned outward from the rear frame portion 71B.

[0166] As shown in Figures 8 to 9 and 11, the syringe fixing portion 8 is composed of a needle fixing shaft 80 for mounting and fixing the transplant needle A of the transplant syringe B1, and a syringe fixing shaft 81 that is arranged parallel to the needle fixing shaft 80 and fits into the outer bottom surface of the syringe 4 of the transplant syringe B1 to mount and fix the syringe 4.

[0167] That is, as shown in FIG. 9, the syringe fixing portion 8 is configured such that a needle fixing shaft 80 is horizontally supported between the left and right frame portions 70L, 70R in the front half of the right frame portions 70L, 70R, and a syringe fixing shaft 81 is horizontally supported between the left and right frame portions 70L, 70R in the rear half of the right frame portions 70L, 70R.

[0168] The needle fixing shaft 80 is a thick rod having a predetermined length, and is formed with a needle fitting recess 80a in the longitudinal center for fitting and supporting the needle body 2 of the transplantation needle A1 of the transplantation syringe B1.

[0169] The needle fitting recess 80a is an upwardly open recessed groove formed by cutting out the outer peripheral upper surface of the longitudinal center of the syringe fixing shaft 81 in a substantially semi-cylindrical shape perpendicular to the extension direction of the shaft, and has a horizontal recessed bottom surface 80b.

[0170] In addition, the syringe fixing shaft 81 is a thick rod having a predetermined length, similar to the needle fixing shaft 80, and has a shaft fitting protrusion 81a formed in the longitudinal center thereof, which corresponds to and fits into the shaft fitting recess 43 formed on the outer bottom surface of the syringe 4 of the transplant syringe B1.

[0171] The shaft fitting protrusion 81a is formed as a flat plate of a predetermined thickness extending along the axis of the shaft and having front and rear vertical surfaces, by front and rear notches formed in the vertical direction in an approximately semicylindrical shape on the front and rear outer periphery of the longitudinal center of the syringe fixing shaft 81.

[0172] In addition, the outer circumferential upper surface of each of both end portions of the needle fixing shaft 80 and the syringe fixing shaft 81 is cut flat as shown in FIG. 9 to form shaft fixing portions 80aL, 80aR, 81bL, 81bR that fit into the front and rear shaft fitting holes 70aL, 70aR, 70bL, 70bR provided at predetermined positions in the front and rear longitudinal parts of the left and right frame portions 70L, 70R, respectively.

[0173] The left and right frame portions 70L, 70R have bolt insertion holes 70cL, 70cR, 70dL, 70dR extending vertically from the upper surfaces thereof and communicating with the front and rear shaft fitting holes 70aL, 70aR, 70bL, 70bR, respectively.

[0174] That is, as shown in FIG. 8, the support frame 7 has shaft fixing portions 80aL, 80aR, 81bL, 81bR fitted into the front and rear shaft fitting holes 70aL, 70aR, 70bL, 70bR, respectively, and bolts 75 screwed into the bolt insertion holes 70cL, 70cR, 70dL, 70dR, thereby fixing each shaft 80, 81 between the left and right frame portions 70L, 70R to form the syringe fixing portion 8.

[0175] The front fitting holes 70aL, 70aR are formed through the left and right frame parts 70L, 70R at approximately the center in the vertical direction. The rear fitting holes 70bL, 70bR are formed through the left and right frame parts 70L, 70R at a position lower than approximately the center in the vertical direction. In other words, the syringe fixing shaft 81 is provided at a position relatively lower than the height position of the needle fixing shaft 80.

[0176] As a result, when the transplant syringe B1 is placed on the transplant loading tool C1, the needle body portion 2 of the transplant needle A1 is placed in the needle fitting recess 80a of the needle fixing shaft 80, and the shaft fitting recess 43 of the syringe 4 is fitted into the shaft fitting protrusion 81a of the syringe fixing shaft 81, thereby restricting left-right and front-back movement.

[0177] In this way, the transplant syringe B1 is supported downwardly by the syringe fixing portion 8 of the support frame 7 relative to the transplant loading jig C1, and is placed and fixed in a horizontal position with its axis aligned on a virtual center line (shown by a dotted line in Figure 11) extending through the center of the width of the support frame 7, and with the upper opening 31 of the transplant loading hole 30 of the transplant needle A facing upward.

[0178] The support frame 7 also includes a plunger stopper 73 that restricts the insertion position of the plunger 5 so that the soft implant G inserted in the needle channel 3 of the transplant needle A is positioned near the tip opening of the needle body 1 .

[0179] As shown in FIG. 8, the pusher stopper 73 is configured by a rear frame portion 71B having a rod insertion recess 73a formed by cutting out a recessed portion in the upper surface.

[0180] As shown in Figure 11 (b) , the rod insertion recess 73a is a groove that is open both front to rear and upward, formed by cutting out the longitudinal center of the upper surface of the rear frame portion 71B along the width direction (front to back direction) in a roughly U-shaped downward manner when viewed from the front, and allows the rod body portion 50a of the pusher rod 50 to be inserted from above into the inside of the recess.

[0181] The cutout depth of the rod insertion recess 73a (the length from the top surface of the rear frame portion to the bottom surface of the recess) is set so that the bottom surface of the recess is located lower than the vertical center of the rear frame portion 71B.

[0182] The width of the rod insertion recess 73a is wider than the outer diameter of the rod body 50a of the push rod 50. In other words, the width of the rod insertion recess 73a is set to a length that forms a certain clearance between the outer circumferential surface of the rod body 50a of the push rod 50 and the inner circumferential surface of the rod insertion recess 73a so that the outer circumferential surface of the rod body 50a of the push rod 50 does not interfere with the inner circumferential surface of the rod insertion recess 73a when the body of the push rod 50 is positioned inside the recess.

[0183] When the transplant syringe B1 is placed and fixed in a fixed position on the transplant loading jig C1, the transplant syringe B1 positions the body of the pusher 5 (rod body 50a of the push rod 50) inside the rod insertion recess 73a of the rear frame portion 71B, as shown in Figures 11(a) and 11(b), and positions the base end of the pusher 5 (operating portion 51 of the pusher rod 50) outward from the rear frame portion 71B.

[0184] In this state, when the push rod 5 is operated to slide forward, as the rod body 50a of the push rod 50 moves in the forward direction, as shown in Figure 14(a), the operating portion 51 of the push rod 50 abuts against the outer surface of the rear frame portion 71B, restricting further movement of the push rod 5 in the forward direction.

[0185] Furthermore, the position of the tip of the core metal 52 extending from the tip of the pusher rod 50 is restricted to the middle of the needle channel 3 of the needle body 1, so that the soft implant is positioned near the needle tip opening 10 of the transplantation needle A1.

[0186] In other words, the stopping position of the plunger 5 by the plunger stopper 73 is equal to the position at which the soft graft G pressed by the tip of the plunger 5 stops in the vicinity of the needle tip opening 10, and the implant loading jig C1 has the syringe fixing portion 8 and the plunger stopper 73 (rear frame portion 71B) arranged on the support frame 7 in such a relative positional relationship.

[0187] In addition, the support frame 7 is provided with a needle tip guard 74 that surrounds the needle tip portion of the transplant needle A1 of the transplant syringe B1, which is placed and fixed in a horizontal position via the syringe fixing part 8, i.e., the blade surface 11 of the needle main body 1 and the needle tip opening 10, from the outer periphery, as shown in Figures 8, 11(a) and 11(b).

[0188] The needle tip guard 74 is composed of a front frame part 71F having a tip guard recess 74a formed by cutting out the tip guard recess 74a on the upper surface. The tip guard recess 74a is formed by cutting out the upper surface of the longitudinal center part of the front frame part 71F downward along the width direction (front-rear direction) in a roughly U-shaped manner when viewed from the front, forming a groove that is open front-rear and upward, and allows the needle tip of the transplantation needle A1 to be positioned inside the U-shape.

[0189] The tip guard recess 74a and the rod insertion recess 73a have approximately the same cutout depth and width, and are formed in the front and rear frame portions 71F and 71B, respectively, on the virtual center line of the support frame 7 (shown by a dotted line in Figure 11), and face each other.

[0190] In addition, a loading press body 9 is provided on one side of the support frame 7, i.e., on the upper surface of either the left or right frame portion 70L, 70R (in this embodiment, the right frame portion 70R), as shown in Figures 1(a), 1(b), and 8.

[0191] As shown in Figures 10 and 11(a), the loading press body 9 is supported so as to be rotatable horizontally relative to the support frame 7, and comprises a pivot arm 90 having a vertically penetrating through hole 90a at its tip, a pressure pin 92 that is loosely fitted into the through hole 90a of the pivot arm 90 and is biased downward via an elastic body 91 so as to fit into the transplant loading hole 30 of the transplant needle A1, and a pin support 93 that supports the pressure pin 92 on the pivot arm 90 at a position above the pivot arm 90 and enables the pressure pin 92 to be pulled upward against the downward biasing force of the elastic body 91.

[0192] As shown in FIG. 10, the rotating arm 90 is a strip of a rounded rectangular shape in plan view having a predetermined thickness, with a through hole 90a formed vertically at the tip end for loosely fitting a pressure pin 92, and a pivot hole 90b formed vertically at the base end for inserting a pivot part 94a erected on the support frame 7.

[0193] The length of the pivot arm 90 is formed so that, when viewed in a plane as shown in Figure 11(a), when the free pivot end (tip) rotates via the pivot portion 94a at the base end, the pressure pin 92 fitted into the through hole 90a at the tip has a rotation radius such that it is positioned above the upper opening 31 of the graft loading hole 30 of the transplant needle A1 of the transplant syringe 1 mounted and fixed on the transplant loading jig C1.

[0194] That is, in a plan view, the pivot arm 90 has a length such that the upper opening 31 of the implant loading hole 30 of the transplant needle A is positioned in phase with the rotational trajectory (shown by a dotted line in FIG. 11(a)) traced by the center of the through hole 90a on the tip side as it pivots and displaces around the pivot portion 94a at the base end as shown in FIG. 11(a).

[0195] In other words, the length of the pivot arm 90 is determined by the length from the center of the base end pivot hole 90b, which is pivoted so that the center of the through hole 90a is positioned above the implant loading hole 30, to the center of the tip end through hole 90a.

[0196] In this embodiment, the length of the pivot arm 90 is approximately the same as half the length of the support frame 7 in the left-right direction (half the length of the needle fixing shaft 80 of the syringe fixing part 8), and as shown in Figure 11(a), the tangent to the rotation trajectory of the pivot arm 90 (shown by a two-dot dashed line in Figure 11(a)) and the virtual center line of the support frame 7 (shown by a one-dot dashed line in Figure 11(a)) are made to coincide with each other, making it possible to position the loading press body 9 above the transplant loading hole 30 arranged on the same virtual center line.

[0197] In addition, at the position where the needle fixing shaft 80 is provided on the upper surface of the front half of the right frame portion 70R of the support frame 7, an arm support base 94 is provided to rotatably support the upper part of the rotating arm 90, as shown in Figures 8 and 10.

[0198] The arm support base 94 is cylindrical and rod-like in shape with a convex cross section, and as shown in FIG. 10, its lower half forms a fixed portion 94b that is fixed upright to the upper surface of the support frame 7, and its upper half forms a cylindrical portion 94a that is smaller in diameter than the lower half and pivots the arm, and a fitting step 94c having a horizontal upper surface on which the rotating arm 90 is placed is formed between the fixed portion 94b and the pivot portion 94a.

[0199] That is, the rotating arm 90 is placed on the fitting step 94c of the arm support seat 94 with its lower surface in face contact with the upper surface of the fitting step 94c, and is pivotally supported on the pivot portion 94a of the arm support seat 94 at the pivot hole 90b at the base end for horizontal rotation.

[0200] The rotating arm 90 is attached to the arm support seat 94 by a fixing bolt 95 that is screwed into the axial direction of the arm support seat 94 via a washer 95a, as shown in Figure 10, with the pivot hole 90b on the base end side fitted onto the pivot portion 94a of the arm support seat 94.

[0201] In addition, a rotation stopper 96 is provided adjacent to the arm support seat 94 near the base end of the rotating arm 90, as shown in Figure 11 (a) , to slide against the arc-shaped outer peripheral surface of the base end side of the rotating arm 90 in a plan view and to regulate the rotation position of the rotating arm 90.

[0202] As shown in Figure 10, the rotation stopper 96 is a roughly rectangular prism having roughly the same height as the arm support seat 94, and is erected on the support frame 7 adjacent to the arm support seat 94 toward the center of the support frame 7, with one side of the upper part formed as a regulating surface that causes the arm support seat 94 to abut and slide against a part of the outer circumferential surface of the base end side of the rotating arm 90.

[0203] As a result, when the tip of the pivot arm 90 is pivotally displaced inwardly of the support frame 7 via the pivot portion 94a, as shown in Figure 11, the pivot point describes an imaginary semicircle having a diameter parallel to an imaginary straight line extending flush with the regulating surface of the pivot stopper 96 in a planar view.

[0204] In other words, as the pivot arm 90 rotates and displaces, the arc-shaped outer peripheral surface at the base end of the pivot arm 90 slides in point contact against the regulating surface of the pivot stopper 96, and the outer surfaces extending in a straight line from the left and right ends of the arc-shaped outer peripheral surface in a planar view engage in surface contact with the regulating surface of the pivot stopper 96, thereby regulating the rotation position of the pivot arm 90.

[0205] The pressure pin 92 is generally cylindrical with a bottom, and is composed of a lifting body 92a which is loosely fitted into the through hole 90a of the pivot arm 90 as shown in Figure 10 and moves up and down, a flange portion 92b which protrudes radially outward from the lower outer periphery of the lifting body 92a and supports the elastic body 91 from below between it and the lower bottom surface of the pivot arm 90, and a pin main body portion 92c which protrudes axially downward from the lower end of the lifting body 92a and is inserted into the transplant loading hole 30 of the transplant needle A1 with its upper opening 31 facing upward when the transplant syringe B1 is in a horizontal position.

[0206] The elastic body 91 is a compression coil spring whose inner diameter is approximately the same as the outer diameter of the lifting body 92a of the pressure pin 92, and as shown in Figure 11 (b), it is fitted onto the lifting body 92a with its upper and lower ends engaging the underside of the pivot arm 90 and the upper surface of the flange portion 92b of the pressure pin 92, respectively, and is interposed between the pivot arm 90 and the pressure pin 92.

[0207] The pin support 93 is a knurled screw having a wide operation head 93a as shown in FIG. 10, and supports the pressing pin 92 inserted into the through hole 90a of the rotating arm 90 from above the rotating arm 90.

[0208] Specifically, the pin support body 93 is screwed into the upper end surface of the lifting body portion 92a of the pressure pin 92 with the pressure pin 92 inserted into the through hole 90a of the pivot arm 90, and the lower surface of the operating head 93a abuts and engages with the upper peripheral surface of the through hole 90a of the pivot arm 90, thereby supporting the pressure pin 92 upwardly with it hanging down from the tip of the pivot arm 90.

[0209] In other words, the pressure pin 92 is configured to be positioned at the tip of the pivot arm 90, biased downward by the elastic body 91, and the tip of the pin main body 92c is supported hanging downward by the pin support 93, so that at the most raised position where the pin support 93 is pulled up against the biasing force of the elastic body 91, the tip of the pin main body 92c is positioned at least above the outer circumferential top surface position of the transplant needle A1 in the horizontal state, and at the most lowered position where the pin support 93 is pulled down by the elastic body 91, the tip of the pin main body 92c is positioned below the outer circumferential top surface position of the transplant needle A1 in the horizontal state.

[0210] In addition, in this embodiment, the pressure pin 92 is configured so that, when it is raised to the highest position by the pin support 93 against the biasing force of the elastic body 91, the tip of the pin main body 92c is positioned above the upper surface position of the left and right frame portions 70L, 70R.

[0211] The pin main body 92c is a roughly cylindrical protrusion that fits into the graft loading hole 30, and corresponds to the tip of the pressing pin 92. It functions as a pusher that pushes the soft graft G temporarily placed inside the graft loading hole 30 downward toward the inside of the needle channel 3 in response to the downward force of the elastic body 91.

[0212] The dimensions of the pin body 92c are such that the outer diameter is approximately the same as the inner diameter of the graft loading hole 30, and the length is slightly longer than the hole length of the graft loading hole 30. As shown in Figure 10, the axis of the pin body 92c is coaxial with the axis of the lifting body 92a, that is, at the same position as the center of the through-hole 90a at the tip of the rotating arm 90.

[0213] In addition, the tip corner of the pressure pin 92 is a tapered portion 97, and is formed so that when the pressure pin 92 is inserted into the transplant loading hole 30, at least a portion of the tapered portion 97 protrudes into the needle channel 3 of the transplant needle A1, as shown in Figure 13.

[0214] The tapered portion 97 is formed by cutting and chamfering the tip corner of the pin body portion 92c of the pressing pin 92 as shown in Figure 13, and engages with the tapered portion 33 formed on the opening edge of the lower opening 32 of the graft loading hole 30 by surface contact.

[0215] In other words, the pressure pin 92 has a sharp tip, including a portion whose tip is narrower than the inner diameter of the lower opening 32 of the graft loading hole 30, and the sharp outer periphery is formed into a tapered portion 97 that engages with the opening edge of the lower opening 32 of the graft loading hole 30, and the sharp apex has a top surface that is approximately flat and exposed from the lower opening 32 of the graft loading hole 30, and is formed into a protrusion 98 that protrudes into the needle duct 3.

[0216] As a result, the pressing pin 92 engages with the opening edge of the lower opening 32 of the graft loading hole 30 via the tapered portion, making it possible to prevent the tip of the pressing pin 92 from accidentally entering the needle passage 3 and blocking the needle passage 3, thereby accidentally restricting the advancement movement of the plunger 5. The length of projection of the protruding portion 98 from the lower opening 32, i.e., the depth of penetration into the needle passage 3, is set to about 0.1 to 0.2 mm.

[0217] In particular, the protruding portion 98 protruding from the needle passage 3 makes it possible to clamp the soft implant G between the opposing inner surface of the needle passage 3 when the pressure pin 92 is fitted and engaged with the implant loading hole 30 via the tapered portion 97, as shown in Figure 13.

[0218] In other words, the soft implant G sandwiched between the protrusion 98 of the pressure pin 92 and the inner surface of the needle passage 3 is pressed against the opposing inner surface of the needle passage 3 by the downward pressure stress of the protrusion 98 due to its soft and amorphous nature, and is deformed and bulges out so as to expand along the front and rear of the extension direction of the needle passage 3, centered on the pressed portion.

[0219] Specifically, when the soft implant G receives a downward pressing stress (indicated by a downward arrow in FIG. 13) from the loading press body 9, it undergoes a bulging deformation due to its soft amorphousness, as shown in FIG. 13, and breaks down the downward pressing stress into a tensile swelling stress (indicated by an arrow generally in the left-right direction in FIG. 13) that tensilely bulges outward in the front-to-rear direction from the pressing portion.

[0220] That is, the bulging portion of the soft implant G is constantly subjected to an outward tensile stress centered on the portion pressed by the pressing pin 92. Then, an extrusion stress in the advancing direction opposite to the tensile stress of the bulging portion is applied by the pusher 5, thereby moving the soft implant G in the advancing direction.

[0221] When the soft graft G receives an extrusion stress from the advancement direction by the pusher 5, it attempts to bulge in a direction perpendicular to the advancement direction, i.e., in the extension direction of the graft loading hole 30. However, this bulging deformation is suppressed because a downward pressing stress is constantly applied from the lower opening 32 of the graft loading hole 30 by the pressing pin 92, and the extrusion stress in the advancement direction of the pusher 5 is not inadvertently dissipated. The downward pressing stress by the loading presser 9 is greater than the pressing stress in the advancement direction by the pusher.

[0222] In this way, the loaded pressure body 9 constantly applies a pressing stress to the soft graft G in a direction perpendicular to the advancing direction of the pusher 5, thereby controlling the inadvertent dispersion of the pressing stress from the advancing direction due to the bulging deformation of the soft graft G, while the pusher 5 reliably applies an extrusion stress to the soft graft in the advancing direction, allowing the soft graft G to move smoothly within the needle channel 3.

[0223] Furthermore, even if the tip of the pusher hits the tip of the pressure pin 92 during the push-out sliding operation of the pusher 5, the tip is tapered portion 97, so the pusher 5 can slide in contact with the tip, and the pusher 5 can move smoothly.

[0224] [5] Instructions for use of the implant loading tool according to the present invention Next, a method of using the implant loading jig according to the present invention will be described. The implant loading jig C1 is placed on a horizontal surface such as a laboratory table, and as shown in Fig. 1(a) in plan view, the loading presser 9 is placed outside the support frame 7, leaving the space inside the frame open upward.

[0225] As shown in FIG. 1(b) and FIG. 11(a), a transplant syringe B1 equipped with a transplant needle A1 is fitted and installed in the transplant loading jig C1 with the space inside the frame being open upward.

[0226] Specifically, the transplant syringe B1 is placed on the support frame 7 of the transplant loading jig C1 by fixing the corresponding syringe 4 and transplant needle A1 to the syringe fixing shaft 81 and needle fixing shaft 80, which are respectively installed at predetermined positions in the front and rear inside the frame.

[0227] In this state, the transplant syringe B1 is set in the transplant loading jig C1 in a horizontal position with the upper opening 31 of the transplant loading hole 30 of the transplant needle A1 facing upward.

[0228] 12(a), soft graft G, which has been cut into small pieces, is inserted into the graft loading hole 30 of the transplant needle A using tweezers or the like. At this time, the soft graft G is pushed into the graft loading hole 30 with the tip of the tweezers or the like so as not to protrude from the upper opening 31.

[0229] Next, the loading press body 9 is placed inside the support frame 7 as shown in FIG. 11(a) to FIG. 12(b).

[0230] Specifically, as shown in Figure 11(a), the pivot arm 90 of the loading press body 9 is rotated horizontally inward via the pivot portion 94a at its base so as to block the space inside the support frame 7, and the pressing pin 92 connected to the tip of the pivot arm 90 is positioned above the upper opening 31 of the transplant loading hole 30 of the transplant needle A1.

[0231] When this pivot arm 90 is pivoted toward the inside of the frame, the pressure pin 92, which is in a lowered position and biased downward by the elastic body 91 interposed between the pivot arm 90, is raised to an upper position where the tip of the pin does not interfere with the upper surface of the support frame 7 or the outer circumferential upper surface of the transplant needle A1 by pinching the pin support 93 with the fingers and pulling it upward against the downward biasing force.

[0232] Next, when the finger is released from the pin support 93, the pressing pin 92 at the tip of the rotating arm 90 descends into the elastic body 91 and is fitted into the graft loading hole 30 as shown in Figures 12(b) and 13, applying downward stress to the soft graft G set inside the hole. As a result, the soft graft G moves from inside the graft loading hole 30 through the lower opening 32, which is elliptical in plan view, into the inside of the needle channel 3.

[0233] The soft implant G moved to the needle channel 3 through the implant loading hole 30 is positioned in a downwardly pressurized state by the pressing stress from the loading press body 9 at the confluence of the implant loading hole 30 and the needle channel 3, i.e., within the tubular hole near the tip of the needle body 2 of the implant needle A1.

[0234] In this state of pressure from the loading press body 9, as shown in Figure 13, the soft implant G in the needle passage 3 bulges and deforms in the front-to-back direction of the needle passage 3, centered on the pressurized portion, as described above, and a tensile bulging stress is generated in the bulging portion of the soft implant G in the axial direction of the needle passage 3, as described above.

[0235] Next, the pusher 5 of the transplant syringe B1, which is in the retracted position, is pushed and slid in the forward direction, so that a compressive stress in the forward direction is applied to the pressurized soft implant G, moving it to a position near the needle tip opening 10.

[0236] Specifically, as shown in FIG. 14(a), the push rod 50 is pushed in the advancing direction from the retracted position via the operating part 51 against the elastic force of the elastic body 53 between the syringe 4 and the push rod 50, and the core metal 52 is moved in the advancing direction.

[0237] As the core bar 52 moves in the advancing direction, the tip portion 52a of the core bar 52 acts on the soft implant G which is placed in a pressurized state by the loading pressurizing body 9 inside the needle passage 3, and the soft implant G moves toward the needle tip opening 10.

[0238] Furthermore, when the pusher 5 is pushed in the forward direction, the operating portion 51 (the front side surface of the operating portion 51) at the base end of the pusher rod 50 hits the pusher stopper 73 (the rear outer surface of the rear frame portion 71B), restricting further forward movement of the pusher 5.

[0239] In this state where the pusher 5 is restricted by the pusher stopper 73 , the tip portion 52 a of the core metal 52 stops at a position where the soft implant G is positioned near the needle tip opening 10 .

[0240] Next, as shown in FIG. 14(b), the fingers are released from the operating portion 51 of the plunger 5, and the plunger 5 is returned to its retracted position by the elastic body 53, thereby completing the loading of the soft implant G into the transplant syringe B1 prior to the procedure.

[0241] Finally, the transplant syringe B1 loaded with the soft graft G is removed from the transplant loading jig C1, and the transplant needle A1 of the transplant syringe B1 is inserted into the subcutaneous tissue of the recipient H as shown in Figure 15. The plunger 5 is then pushed all the way in, and the soft graft G is pushed out from the needle tip opening 10 and placed at the transplant site, thereby completing the graft placement operation.

[0242] [6] Configuration of the implantation needle, implantation syringe, and implant loading tool according to the second embodiment Next, the configurations of the transplant needle A2, transplant syringe B2, and transplant loading jig C2 according to the second embodiment will be described with reference to the drawings. Fig. 16 is a side cross-sectional view showing the configuration of the transplant syringe, Fig. 17 is a partially enlarged perspective view showing the configuration of the transplant syringe, and Fig. 18 is a perspective view showing the configuration of the transplant loading jig. In the following, parts having the same configuration as the first embodiment will be given the same reference numerals and will not be described.

[0243] The transplant syringe B2 is provided with a needle positioning means 44 that indicates the relative positional relationship between the needle locking pin hole 40a of the syringe 4, the pin engagement groove 200 of the transplant needle A2, and the transplant loading hole 30 when the transplant needle A2 is fitted into the needle mounting portion 40 at the tip of the syringe 4, as shown in Figure 17.

[0244] That is, on the outer circumferential upper surface of the tip of the syringe 4, as shown in FIG. 17, a narrow groove 44a having a V-shape in cross section is cut toward the tip side along the axial direction of the syringe 4 as a needle positioning means 44.

[0245] As shown in FIG. 16, the needle positioning means 44 is formed on the peripheral wall of the tip of the syringe 4 at a circumferential position opposite to the circumferential position at which the needle locking pin hole 40a is formed.

[0246] In other words, the needle locking pin hole 40a and the needle positioning means 44 are respectively disposed in opposite phases around the axis of the syringe 4 when viewed in the axial direction.

[0247] Specifically, on the peripheral wall of the syringe 4, a needle positioning means 44 is formed on one side (upper side) of the axis of the syringe 4 when viewed from the side, and a needle locking pin hole 40a is formed on the other side (lower side) opposite the same side, each at a predetermined position along the axis.

[0248] As a result, by using the needle positioning means 44 of the syringe 4 as a landmark, positioning the transplant loading hole 30 of the transplant needle A2 on a virtual positioning line extending axially from the needle positioning means 44 toward the tip, and inserting the transplant needle A2 into the needle mounting portion 40 at the tip of the syringe 4, the position of the needle locking pin hole 40a of the syringe 4 and the position of the pin engagement groove 200 of the transplant needle A2 are aligned in a relative correct position, simplifying the operation of inserting the needle locking pin 400b into the needle locking pin hole 40a, and making it easier to attach the transplant needle A2 to the syringe 4.

[0249] In this embodiment, the needle positioning means 44 is a narrow groove 44a, but is not limited to this as long as the relative correct positions of the needle locking pin hole 40a, the pin engagement groove 200, and the graft loading hole 30 can be visually confirmed as indicators, and for example, it can be configured by displaying an arrow in ink.

[0250] In addition, the pin engagement groove 200 of the transplant needle A2 is formed by recessing the outer peripheral bottom surface of approximately half of the base end of the needle body portion 2 radially inward into a rectangular shape when viewed from the side, as shown in Figure 16, and the concave bottom surface 201 is formed as a flat surface parallel to the axial direction (direction of the circumferential tangent line) of the needle body portion 2 (syringe 4).

[0251] In addition, the needle locking pin 400b inserted into the needle locking pin hole 40a of the syringe 4 has a tip surface 401b formed as a flat surface parallel to the axial direction (circumferential tangent direction) of the syringe 4 (needle body portion 2), as shown in Figures 16 and 17.

[0252] That is, the pin engagement groove 200 of the transplantation needle A2 and the needle locking pin 400b of the syringe 4 are configured such that the concave bottom surface 201 and the tip surface 401b are formed as flat surfaces that come into face-to-face contact with each other, and engage with each other by face-to-face contact.

[0253] As a result, by fitting the transplant needle A2 into the needle fitting hole 62 and inserting the needle locking pin 400b into the needle locking pin hole 40a, even if the pin engagement groove 200 of the transplant needle A2 is slightly misaligned circumferentially from the position of the needle locking pin hole 40a of the syringe 4, the concave bottom surface 201 of the pin engagement groove 200 and the tip surface 401b of the needle locking pin 400b come into face-to-face contact, making it possible to forcibly rotate the transplant needle A2 circumferentially to correct the position of the pin engagement groove 200 of the transplant needle A2 to match the position of the needle locking pin hole 40a.

[0254] In addition, the pressure stress from the needle locking pin 400b can be applied to the needle body 2 of the transplantation needle A2 as much as possible, making it possible to make the crimped engagement state between the transplantation needle A2 and the syringe 4 more secure.

[0255] As shown in FIG. 18, the mechanical strength of the implant loading jig C2 is improved by increasing the thickness of the support frame 7, specifically, the thicknesses of the left and right frame portions 700L and 700R.

[0256] Furthermore, in the loading and pressing body 9 of the transplant loading jig C2, the operating head 930a of the pin support 930 that supports the pressing pin 92 at a position above the tip of the rotating arm 90 is extended upward, thereby improving the gripping ability and improving the operability when pulling up the pressing pin 92.

[0257] Incidentally, the first and second embodiments described above can be implemented even if their configurations are interchanged, and of course the same functions and effects are obtained.

[0258] As described above, according to the present invention, the transplant needle, transplant syringe, and transplant loading tool of the present invention have a unit structure that can be assembled in a predetermined positional relationship so that soft transplants that are difficult to handle can be quickly and easily loaded into the syringe. Therefore, anyone can easily perform the transplant loading work before transplantation, which has been complicated and difficult in injection-type transplantation procedures up until now.

[0259] In other words, according to the present invention, it is possible to provide a transplant needle, a transplant syringe equipped with the transplant needle, and a transplant loading tool which allow anyone to easily, stably, and quickly perform the graft loading operation of positioning a soft solid graft near the tip opening of the transplant needle before the transplant procedure, and the graft placement operation of placing the graft in the desired subcutaneous tissue of the recipient during the transplant procedure, thereby reducing the cost of the procedure as much as possible, eliminating unnecessary loss of the soft solid graft, and improving the reproducibility of the transplant procedure.

[0260] Finally, the above-mentioned description of each embodiment is merely an example of the present invention, and the present invention is not limited to the above-mentioned embodiments. It goes without saying that various modifications are possible depending on the design, etc., as long as they do not deviate from the technical idea of ​​the present invention. [Explanation of symbols]

[0261] A1 transplant needle, 1 needle body, 10 needle tip opening, 11 blade surface, 2 needle body, 20 pin engagement groove, 21 base end opening, 21a opening edge, 3 needle channel, 30 graft loading hole, 31 upper opening, 32 lower opening, 33 tapered portion, B1 transplant syringe, 4 syringe, 40 needle mounting portion, 40a needle locking pin hole, 40b needle locking pin, 41 finger hook flange, 41a fitting hole, 41b locking pin hole, 42 flange mounting portion, 43 shaft fitting recess, 43a bottom surface, 44 needle positioning means, 44a narrow groove, 5 pusher, 50 extrusion rod, 50a rod body, 50b core metal fixing hole, 50c tip surface, 51 operation portion, 51aF, 51aB Front and rear surfaces, 52 core bar, 52a tip portion, 53 elastic body, 54 regulating means, 54a rod guide pin hole, 54b rod guide pin, 54c rod guide groove, 54cF, 54cB front and rear end side walls, 54cL, 54cR left and right side walls, groove top surface 54cU, 6 syringe hole, 60 partition step portion, 61 rod insertion hole, 62 needle fitting hole, 63 core bar insertion hole, C1 graft loading jig, 7 support frame, 70L, 70R left and right side frame portions, 70aL, 70aR, 70bL, 70bR front and rear shaft fitting holes, 70cL, 70cR, 70dL, 70dR bolt insertion holes, 71F, 71B front and rear side frame portions, 73 pusher stopper, 73a rod insertion recess, 74 Needle tip guard, 74a tip guard recess, 75 bolt, 8 syringe fixing part, 80 needle fixing shaft, 80a needle fitting recess, 81 syringe fixing shaft, 81a shaft fitting protrusion, 80aL, 80aR, 81bL, 81bR shaft fixing part, 9 loading press body, 90 rotating arm, 90a through hole, 90b pivot hole, 91 elastic body, 92 pressing pin, 92a lifting body, 92b flange, 92c pin main body, 93 pin support, 93a operation head, 94a pivot, 94b fixing part, 94c fitting step, 95 fixing bolt, 95a washer, 96 rotation stopper, 97 tapered part, 98 protruding part, G soft graft, H graft recipient

Claims

1. The needle includes a hollow cylindrical needle body portion and a hollow cylindrical needle main body portion that is extended from the tip of the needle body portion and has a sharp tip, the needle body and the needle main body are coaxially arranged to connect and communicate with each other a cylindrical hole of the needle main body and a cylindrical hole of the needle body, forming a needle passage having an inner diameter of 0.7 to 1.5 mm; The needle body has a tip that is obliquely cut in a fixed direction relative to the cylindrical axis, and the cut surface is a blade surface whose opening area at the needle tip opening is 3.8 to 6 times the cross-sectional area of ​​the needle passage; The needle body portion has a peripheral wall that is thicker than a peripheral wall of the needle main body portion, The peripheral wall of the needle body is formed with an implant loading hole penetrating the needle passage, the implant loading hole having an upper opening with an inner diameter of 2.0 mm to 4.0 mm on the peripheral surface and a lower opening on one side of the needle passage, the lower opening being substantially elliptical in shape with a major axis in the longitudinal direction of the needle passage and having an opening area of ​​0.04 to 0.5 times the opening area of ​​the upper opening; The edge of the lower opening is formed into a tapered portion that is inclined so as to gradually decrease in diameter toward the needle passage, This transplant needle is characterized in that, when a soft solid transplant is pushed out through the lower opening of the transplant loading hole to be loaded into the needle channel of the needle body, the soft solid transplant is pushed out in a provisionally molded elliptical shape that follows the extension direction of the needle channel by the lower opening.

2. An implant loading tool for use in loading a soft solid implant into a transplant syringe having a transplant needle, comprising: The transplant needle comprises a hollow cylindrical needle body and a hollow cylindrical needle main body extending from the tip of the needle body and having a sharp tip, the needle body and the needle main body are arranged coaxially to connect and communicate the bore of the needle main body with the bore of the needle body, forming a communicating bore into a needle passage, the needle main body is cut at its tip obliquely in a certain direction relative to the bore, and the cut surface is a blade surface, the needle body has a circumferential wall thicker than that of the needle main body, and a graft loading hole having an upper opening opening at the circumferential surface and a lower opening opening on one side of the needle passage is formed through the circumferential wall of the needle body so as to communicate with the needle passage, and a soft solid graft can be loaded into the needle passage through the graft loading hole, The transplant syringe comprises a hollow cylindrical syringe having a syringe hole communicating with the needle channel of the transplant needle and a needle attachment part formed at its tip to allow the transplant needle to be attached and detached, and a pusher which is inserted into the syringe hole from a base end opening of the syringe and pushes outward from the tip opening of the transplant needle the solid transplant which has been loaded into the needle channel from the transplant loading hole of the transplant needle; The implant loading tool includes a support frame having a syringe fixing portion for fixing the implant syringe in a lateral position with the upper opening of the implant loading hole facing upward, and restricting the implant syringe from moving forward, backward, left, and right; a loading pressure body connected to the support frame for applying a downward pressing force from above the transplant loading hole to the solid transplant placed in the transplant loading hole to load it into the needle channel.

3. The implant loading jig according to claim 2, characterized in that the support frame is provided with a pusher stopper that regulates the insertion position of the pusher so that the solid implant loaded into the needle channel of the implant needle is positioned near the tip opening of the needle body.

4. The syringe fixing part is a needle fixing shaft for mounting and fixing the transplant needle of the transplant syringe; The implant loading tool as described in claim 2, characterized in that it is composed of a syringe fixing shaft arranged parallel to the needle fixing shaft and fittingly fitted into the outer peripheral wall of the syringe of the transplant syringe to mount and fix the syringe.

5. The loading press body is a pivot arm supported by the support frame so as to be pivotable in a horizontal direction and having a through hole at a tip end thereof extending in a vertical direction; a pressing pin that is loosely fitted in the through hole of the pivot arm and is biased downward via an elastic body so as to fit into the implant loading hole of the implant needle; a pin support member for supporting the pressing pin on the rotating arm and for enabling the pressing pin to be pulled upward against the downward biasing force of the elastic body; 3. An implant loading tool according to claim 2, comprising:

6. The implant loading tool of claim 5, characterized in that the tip corner of the pressure pin is tapered, and when the pressure pin is inserted into the implant loading hole, at least a portion of the tapered portion protrudes into the needle channel of the implant needle.

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