A medical subcutaneous tunnel device

Abstract

The invention discloses a medical subcutaneous tunnel device, which comprises a puncture head, a tunnel rod, a sleeve, a handle, and a sleeve structure. The puncture head is arranged in a cylindrical structure, one end of the puncture head is a closed end for piercing the skin, and the other end of the puncture head is arranged in an open manner; the tunnel rod is at least partially accommodated in the cylindrical structure of the puncture head, and is detachably fixed to the inner wall of the other end of the puncture head; the sleeve is sleeved on the tunnel rod, and the sleeve is made of polymer material or stainless steel; the handle is connected to the end of the tunnel rod opposite to the puncture head; when an artificial blood vessel is inserted from one end of the puncture head, the sleeve structure is sleeved on the periphery of the puncture head to compress the artificial blood vessel.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a medical subcutaneous tunnel device. Background Art

[0002] Approximately 3.7 million patients undergo hemodialysis each year worldwide, and each patient requires safe and reusable arteriovenous vascular access.

[0003] Hemodialysis is the main treatment for patients with end-stage renal disease. Relevant studies suggest that autologous arteriovenous fistula (AVF) should be the first choice for long-term vascular access. When AVF cannot be established, graft arteriovenous fistula (AVG) is the second choice. Central venous catheter (CVC) can only be used as the last choice because of its annual infection rate of 200% in patients, many complications and high mortality rate.

[0004] After conventional AVF surgery, patients must wait 3-6 months for the arteriovenous fistula to mature before it can be used as a dialysis access. Due to complications such as hypertension and diabetes in patients with end-stage renal disease and the increasing age of patients, about 1 / 3-1 / 2 of patients cannot undergo dialysis because the fistula cannot mature after waiting 3-6 months after surgery, and can only use small-caliber artificial blood vessels to establish AVG.

[0006] Both graft arteriovenous fistula and vascular bypass need to use tunnelers to establish tunnels under the skin to facilitate traction and placement of blood vessels. Before using the tunneler, the tunnel route will be pre-drawn according to the implantation site of the artificial blood vessel, the inflow and outflow tracts, and the appropriate model and length will be selected from the linear, circular or U-shaped tunnelers. The puncture head, tunnel rod, and tunnel rod sleeve will be used to move from one end of the skin incision to the other incision in a certain arc to establish a subcutaneous tunnel; remove and separate the puncture head and tunnel rod sleeve, and after one end of the artificial blood vessel is anastomosed with the autologous blood vessel, the artificial blood vessel is connected to the puncture head, passed through the subcutaneous tunnel, and then the other end of the artificial blood vessel is anastomosed and subsequent operations are performed.

[0007] The tunnel tube walls of the tunnel devices currently on the market are relatively thick, and the inner diameter of the subcutaneous tunnel they create is relatively large. After implantation into the blood vessel, there is a certain gap between the blood vessel wall and the subcutaneous tunnel, resulting in a slow postoperative recovery. After the subcutaneous tunnel is established and the tunnel rod sleeve is removed, the edge of the artificial blood vessel needs to be sutured and fixed to the puncture head, and the artificial blood vessel needs to have the edge of the anastomosis removed before it can be used, which shortens its usable length. The tunnel device needs to be sterilized after use. When multiple operations are performed simultaneously, multiple sets of tunnel devices need to be used in conjunction, which is costly and takes a long time for the sterilization process.

[0008] Therefore, in view of the direction of optimizing and improving the prior art, the purpose of the present invention is to provide a disposable tunnel device and a method of use.

[0009] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0010] The main purpose of the present invention is to provide a medical subcutaneous tunnel device, aiming to solve the above-mentioned problems in the prior art.

[0011] To achieve the above object, the present invention provides a medical subcutaneous tunnel device, the medical subcutaneous tunnel device comprising:

[0012] The puncture head is provided in a cylindrical structure, one end of the puncture head is a closed end for piercing the skin, and the other end of the puncture head is provided in an open manner;

[0013] A tunnel rod, at least partially accommodated in the cylindrical structure of the puncture head, and detachably fixed to the inner wall of the other end of the puncture head;

[0014] A casing, which is sleeved on the tunnel rod and is made of a polymer material;

[0015] A handle connected to the end of the tunnel rod opposite to the puncture head;

[0016] The sleeve structure is sleeved on the periphery of the puncture head to compress the artificial blood vessel when the artificial blood vessel is sleeved from one end of the puncture head.

[0017] Preferably, in the medical subcutaneous tunnel device, the first direction is the direction from the puncture head to the handle, and the puncture head includes a puncture head end, a first fixed segment, a second fixed segment, and a third fixed segment in sequence along the first direction, and the puncture head end, the first fixed segment, the second fixed segment, and the third fixed segment are connected in sequence, and the puncture head end is arranged at the end of the first fixed segment, and the outer diameters of the first fixed segment, the second fixed segment, and the third fixed segment are D1, D2, and D3, respectively, and D1>D2, and D3>D2;

[0018] The inner surface of the sleeve structure is adapted to the shape of the outer surfaces of the first fixing section, the second fixing section and the third fixing section.

[0019] Preferably, in the medical subcutaneous tunnel device, the outer diameter of the first fixed section is gradually widened and then gradually narrowed along the first direction; the outer diameter of the third fixed section is gradually widened along the first direction;

[0020] Correspondingly, the sleeve structure includes a first sleeve segment, a second sleeve segment, and a third sleeve segment in sequence along the first direction. The first sleeve segment, the second sleeve segment, and the third sleeve segment are connected in sequence, and the inner surfaces of the first sleeve segment, the second sleeve segment, and the third sleeve segment respectively match the shapes of the outer surfaces of the first fixed segment, the second fixed segment, and the third fixed segment.

[0021] Preferably, in the medical subcutaneous tunnel device, the maximum outer diameter of the first fixing section is set to be the same as the maximum outer diameter of the third fixing section.

[0022] Preferably, in the medical subcutaneous tunnel device, a plurality of first flexible members are arranged circumferentially on the inner wall of the first sleeve section close to the insertion head end; a plurality of second flexible members are arranged circumferentially on the inner wall of the third sleeve section close to the handle.

[0023] Preferably, in the medical subcutaneous tunnel device, the first fixing section and the second fixing section are detachably fixed together, and the second fixing section and the third fixing section are detachably fixed together;

[0024] Correspondingly, the first sleeve section and the second sleeve section are detachably fixed together, and the second sleeve section and the third sleeve section are detachably fixed together.

[0025] Preferably, in the medical subcutaneous tunnel device, the first sleeve section, the second sleeve section, and the third sleeve section are provided with installation openings along the axial direction;

[0026] During installation, the installation opening is opened to sleeve the first sleeve section, the second sleeve section, and the third sleeve section onto the outer surfaces of the first fixing section, the second fixing section, and the third fixing section, respectively.

[0027] Preferably, in the medical subcutaneous tunnel device, the insertion head end is arranged in a conical shape, and the outer diameter of the insertion head end is arranged to gradually widen along the first direction.

[0028] Preferably, in the medical subcutaneous tunnel device, the third fixing section and the tunnel rod are screwed together through internal threads and external threads.

[0029] Preferably, in the medical subcutaneous tunnel device, the tunnel rod has multiple types when the outer diameter is the same, including a straight type, an arc type, and a U type;

[0030] The tunnel rod has a plurality of different length specifications when the outer diameter is the same;

[0031] The casing with the same outer diameter can be adapted to the tunnel rods with different length specifications.

[0032] Preferably, in the medical subcutaneous tunnel device, the cannula is distinguished by color with different diameters.

[0033] Preferably, in the medical subcutaneous tunnel device, the material of the sleeve is polyethylene, polypropylene, polyvinyl chloride, polytetrafluoroethylene, polycarbonate, polystyrene, or ABS resin.

[0034] Preferably, in the medical subcutaneous tunnel device, the sleeve can be used once when it is made of polymer material;

[0035] When the sleeve is made of stainless steel, it can be sterilized and used repeatedly.

[0036] The present invention has at least the following beneficial effects:

[0037] The puncture head of the present invention is provided in a cylindrical structure, one end of the puncture head is a closed end for piercing the skin, and the other end of the puncture head is provided in an open state. The tunnel rod is at least partially accommodated in the cylindrical structure of the puncture head, and is detachably fixed to the interior of the other end of the puncture head; the sleeve is sleeved on the tunnel rod, and the sleeve is made of a polymer material or a stainless steel material; the handle is connected to the end of the tunnel rod opposite to the puncture head; when the artificial blood vessel is inserted from one end of the puncture head, the sleeve structure is sleeved on the periphery of the puncture head to compress the artificial blood vessel, so that when fixing the artificial blood vessel, it is not necessary to fix it by suturing, and it is not necessary to sew the edge of the artificial blood vessel with the puncture head.

[0038] Furthermore, by providing a first sleeve section, a second sleeve section, and a third sleeve section that match the puncture head, the artificial blood vessel can be pressed against the outer surfaces of the first fixed section, the second fixed section, and the third fixed section at three locations, respectively, which can increase the force-bearing area and reduce damage to the artificial blood vessel; at the same time, since the outer diameter of the second fixed section is smaller than the outer diameters of the adjacent first fixed section and the third fixed section, the outer diameter of the second sleeve section is smaller than the outer diameters of the adjacent first sleeve section and the third sleeve section, and the inner surfaces of the first sleeve section, the second sleeve section, and the third sleeve section respectively match the shapes of the outer surfaces of the first fixed section, the second fixed section, and the third fixed section, so that the artificial blood vessel can be restricted from coming out while reducing stress and reducing damage to the artificial blood vessel.

[0039] Furthermore, the medical subcutaneous tunnel device provided by the present invention establishes a subcutaneous tunnel for bridging arteriovenous fistula grafts and lower limb arteriosclerosis.

[0040] Furthermore, compared with the prior art, the medical subcutaneous tunnel device provided by the present invention can be sterile, disposable, and thinner than a stainless steel cannula when the cannula is made of a polymer material. The inner diameter of the tunnel prepared subcutaneously using the medical subcutaneous tunnel device is more closely aligned with the outer wall of the artificial blood vessel, and the cannula is smoother, thereby reducing damage to subcutaneous tissue, alleviating postoperative edema, shortening the patient's discharge time, and facilitating use by doctors. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 An exploded schematic diagram of an embodiment of a medical subcutaneous tunnel device provided by the present invention;

[0042] Figure 2 for Figure 1 A schematic diagram of an embodiment of a socket structure;

[0043] Figure 3 for Figure 1 A schematic diagram of a puncture head in another embodiment;

[0044] Figure 4 For Figure 3 A schematic diagram of another embodiment of a sleeve structure used in conjunction with a puncture head;

[0045] Figure 5 for Figure 4 A schematic diagram of another embodiment of the sleeve structure;

[0046] Figure 6 for Figure 4 A schematic diagram of the first sleeve section in another embodiment;

[0047] Figure 7 for Figure 4 A schematic diagram of the third sleeve section in another embodiment;

[0048] Figure 8 for Figure 1 The second section is a schematic diagram of an embodiment;

[0049] Fig. 9 for Figure 1 The second section is a schematic diagram of another embodiment;

[0050] Fig.10 for Figure 1 The second paragraph is a schematic diagram of yet another embodiment;.

[0051] Reference numerals of the present invention:

[0052] Label name Label name 100 Medical subcutaneous tunnel 4 handle 1 Piercing head 5 Socket structure 11 Insert the head 51 First socket section 12 First fixed section 511 The first flexible member 13 Second fixed section 52 Second socket section 14 The third fixed section 53 The third socket 15 Open 531 The second flexible member 2 Tunnel pole 54 Fourth socket section 21 Paragraph 1 55 Mounting port 22 Paragraph 2 551 First End 3 casing 552 Second end

[0053] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0054] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0055] In the embodiments of the present invention, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0056] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0057] In the embodiments of the present invention, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0058] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0059] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, it can be understood by those skilled in the art that in the embodiments of the present invention, many technical details are proposed in order to enable the reader to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can also be implemented. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0060] Figure 1 This is a schematic diagram of an exploded view of an embodiment of a medical subcutaneous tunnel device provided by the present invention. Figure 1 As shown, the present invention provides a medical subcutaneous tunnel device 100, which includes a puncture head 1, a tunnel rod 2, a sleeve 3, a handle 4, and a sleeve structure 5. The puncture head 1 is provided in a cylindrical structure, one end of the puncture head 1 is a closed end for piercing the skin, and the other end of the puncture head 1 is provided in an open 15. The tunnel rod 2 is at least partially accommodated in the cylindrical structure of the puncture head 1, and is detachably fixed to the inside of the other end of the puncture head 1; the sleeve 3 is sleeved on the tunnel rod 2, and the sleeve 3 is made of polymer material or stainless steel; the handle 4 is connected to the end of the tunnel rod 2 opposite to the puncture head 1; the sleeve structure 5 is sleeved on the periphery of the puncture head 1 when the artificial blood vessel is inserted from one end of the puncture head 1 to compress the artificial blood vessel.

[0061] During installation, the sleeve 3 is sleeved on the tunnel rod 2, one end of the tunnel rod 2 is extended into the cylindrical structure of the puncture head 1 from the open end 15 of the puncture head 1, and then one end of the tunnel rod 2 is connected to the other end of the puncture head 1, and the handle 4 is installed on the other end of the tunnel rod 2.

[0062] It should be noted that the casing 3 can cover all or part of the tunnel rod 2; it can also cover part of the other end of the puncture head 1. In this case, one end of the casing 3 covers at least part of the puncture head 1, and the other end covers at least one end of the tunnel rod 2 close to the puncture head. The other end of the casing 3 can also cover the entire tunnel rod 2.

[0063] Before use, the tunnel route will be pre-drawn according to the implantation site of the artificial blood vessel, the inflow channel and the outflow channel. Different types of tunnel rods 2 can be selected according to the length and path of the tunnel route (for example, when the tunnel route is linear, a linear tunnel rod 2 is selected; when the tunnel route is circular, a circular tunnel rod 2 is selected; when the tunnel route is U-shaped, a U-shaped tunnel rod 2 is selected); the skin at both ends of the tunnel route will be incised in advance to form a first incision and a second incision.

[0064] During the specific operation, the operator holds the handle 4 and extends the puncture head 1 from the first incision along the tunnel line to the second incision. At this time, the puncture head 1 is removed from the tunnel rod 2, and after one end of the artificial blood vessel is anastomosed with the autologous blood vessel, the end of the artificial blood vessel is inserted into the puncture head 1. After the artificial blood vessel is inserted, the sleeve structure 5 is sleeved on the periphery of the puncture head 1 and the artificial blood vessel is pressed; after installation, the puncture head 1 is installed on the tunnel rod 2; after installation, the handle 4 is pulled to pull the artificial blood vessel back to the first incision along the subcutaneous tunnel, and the human blood vessel can be released from the puncture head 1.

[0065] The puncture head 1 of the present invention is provided in a cylindrical structure, one end of the puncture head 1 is a closed end for piercing the skin, and the other end of the puncture head 1 is provided in an open 15. The tunnel rod 2 is at least partially accommodated in the cylindrical structure of the puncture head 1, and is detachably fixed to the inside of the other end of the puncture head 1; the sleeve 3 is sleeved on the tunnel rod 2, and the sleeve 3 is made of polymer material; the handle 4 is connected to the end of the tunnel rod 2 opposite to the puncture head 1; the sleeve structure 5 is sleeved on the periphery of the puncture head 1 when the artificial blood vessel is inserted from one end of the puncture head 1 to compress the artificial blood vessel, so that when fixing the artificial blood vessel, it is not necessary to fix it by suturing, and it is not necessary to sew the edge of the artificial blood vessel with the puncture head 1.

[0066] Among them, Figure 1As shown, one end of the puncture head 1 is a closed end, and the closed end is used as the head end for penetrating the skin. The shape of the closed end needs to be convenient for passing through the subcutaneous tissue. The closed end can be a conical structure, an arc structure, or other shapes, which are not listed here. It should be noted that the closed end is reduced along the first direction, so that it is convenient for the puncture head 1 to pass through the subcutaneous tissue and reduce resistance. In this embodiment, the puncture head end 11 is conical, and the outer diameter of the puncture head end 11 is gradually widened along the first direction.

[0067] It should be noted that the first direction mentioned in the present invention is the direction from the puncture head 1 to the handle 4.

[0068] Figure 3 FIG. 2 shows a schematic diagram of the puncture head 1 in another embodiment. Figure 3 As shown, the first direction is the direction from the puncture head 1 to the handle 4, and the puncture head 1 includes a puncture head end 11, a first fixed section 12, a second fixed section 13, and a third fixed section 14 in sequence along the first direction. The third fixed section 14 is screwed together with the tunnel rod 2 through internal threads and external threads. The puncture head end 11, the first fixed section 12, the second fixed section 13, and the third fixed section 14 are connected in sequence, and the puncture head end 11 is arranged at the end of the first fixed section 12, and the outer diameters of the first fixed section 12, the second fixed section 13, and the third fixed section 14 are D1, D2, and D3, respectively, and D1>D2, D3>D2. The inner surface of the sleeve structure 5 is adapted to the shape of the outer surface of the first fixed section 12, the second fixed section 13, and the third fixed section 14. After one end of the artificial blood vessel is inserted into the insertion head end 11, and passes through the first fixing section 12, the second fixing section 13, and the third fixing section 14 in sequence, the second fixing section 13 is tightly sleeved by the sleeve structure 5 to fix the artificial blood vessel. At this time, there is no need to suture the artificial blood vessel for fixation.

[0069] Furthermore, since the outer diameters of the first fixing section 12 and the third fixing section 14 are larger than the second fixing section 13 , after the artificial blood vessel is fixed to the second fixing section 13 and fixed by the sleeve structure 5 , the sleeve structure 5 is not easy to fall out.

[0070] Preferably, the maximum outer diameter of the first fixing section 12 is the same as the maximum outer diameter of the third fixing section 14, so that the artificial blood vessel can be moved more smoothly in the subcutaneous tunnel. In order to facilitate the artificial blood vessel, the outer diameter of the first fixing section 12 is gradually widened and then gradually narrowed along the first direction; the outer diameter of the third fixing section 14 is gradually widened along the first direction.

[0071] More specifically, the portion of the third fixing section 14 close to the second fixing section 13 is gradually widened, while the outer diameter of the portion of the third fixing section 14 away from the second fixing section 13 remains unchanged, so as to facilitate installation. For example, an internal thread can be installed inside the portion of the third fixing section 14 away from the second fixing section 13, so as to facilitate the installation of the third fixing section 13 and the tunnel rod 2.

[0072] Figure 2 FIG. 5 is a schematic diagram showing an embodiment of a sleeve structure 5. Figure 2 As shown, the sleeve structure 5 can be an annular structure, and the sleeve structure 5 has an opening, and the first end 551 and the second end 552 of the sleeve structure 5 are respectively arranged on both sides of the opening, and the first end 551 and the second end 552 are arranged opposite to each other. During installation, the annular sleeve structure 5 can be sleeved on the second fixed section 13 to tighten the artificial blood vessel. After the sleeve structure 5 is sleeved into the second fixed section 13, the first end 551 and the second end 552 can be fixed together by bolts; of course, in other embodiments, it can also be fixed by other fixing methods, such as the first end 551 and the second end 552, one of which is provided with a magnetic attraction part, and the other has a matching part, and the magnetic attraction part and the matching part can be fixed together by magnetic attraction. The matching part can be metal iron. After the sleeve structure 5 is sleeved into the second fixed section 13, since the outer diameter of the second fixed section 13 is smaller than the first fixed section 12 and the third fixed section 14, the second fixed section 13 can be restricted from coming out along the length direction of the puncture head 1.

[0073] Figure 4 FIG. 5 is a schematic diagram showing another embodiment of the sleeve structure 5 of the present invention. Figure 4 As shown, the sleeve structure 5 includes a first sleeve section 51, a second sleeve section 52, and a third sleeve section 53 which are detachably connected together in sequence along the first direction. The first sleeve section 51, the second sleeve section 52, and the third sleeve section 53 are connected in sequence, and the inner surfaces of the first sleeve section 51, the second sleeve section 52, and the third sleeve section 53 match the shapes of the outer surfaces of the first fixed section 12, the second fixed section 13, and the third fixed section 14, respectively. Specifically, the first fixed section 12, the second fixed section 13, and the third fixed section 14 are connected together in sections, the first fixed section 12 and the second fixed section 13 are detachably connected together, and the second fixed section 13 and the third fixed section 14 are detachably connected together. For example, the first fixed section 12 and the second fixed section 13 can be connected by snap-fit ​​or by internal and external threads; similarly, the second fixed section 13 and the third fixed section 14 can be connected by snap-fit ​​or by internal and external threads. Of course, in other embodiments, only the second fixed section 13 and the third fixed section 14 can be detachably connected.

[0074] Similarly, the first sleeve section 51 and the second sleeve section 52 can be connected by a snap connection or by internal and external threads; the second sleeve section 52 and the third sleeve section 53 can be connected by a snap connection or by internal and external threads.

[0075] During the specific installation, the insertion head end 11, the first fixed section 12 and the second fixed section 13 are first connected and installed in the artificial blood vessel, and then the first sleeve section 51, the second sleeve section 52, and the third sleeve section 53 are connected together and sleeved outside the artificial blood vessel, and then the third fixed section 14 is inserted into the artificial blood vessel and fixed with the second fixed section 13. At this time, the first sleeve section 51, the second sleeve section 52, and the third sleeve section 53 are tightly matched with the first fixed section 12, the second fixed section 13, and the third fixed section 14 respectively.

[0076] Furthermore, by providing a first sleeve section 51, a second sleeve section 52, and a third sleeve section 53 that match the puncture head 1, the artificial blood vessel can be pressed against the outer surfaces of the first fixing section 12, the second fixing section 13, and the third fixing section 14 at three locations, respectively, which can increase the force-bearing area and reduce damage to the artificial blood vessel; at the same time, since the outer diameter of the second fixing section 13 is smaller than the outer diameters of the adjacent first fixing section 12 and the third fixing section 14, the outer diameter of the second sleeve section 52 is smaller than the outer diameters of the adjacent first sleeve section 51 and the third sleeve section 53, and the inner surfaces of the first sleeve section 51, the second sleeve section 52, and the third sleeve section 53 respectively match the shapes of the outer surfaces of the first fixing section 12, the second fixing section 13, and the third fixing section 14, so that the artificial blood vessel can be restricted from coming out while reducing stress and reducing damage to the artificial blood vessel.

[0077] Preferably, the maximum outer diameter of the first fixing section 12 is set to be the same as the maximum outer diameter of the third fixing section 14, so that the subcutaneous tunnel can move more smoothly and with less damage.

[0078] Figure 5 FIG. 5 is a schematic diagram showing another embodiment of the sleeve structure 5 of the present invention. Figure 5As shown, the sleeve structure 5 includes a first sleeve section 51, a second sleeve section 52, and a third sleeve section 53 connected together in sequence along the first direction. The first sleeve section 51, the second sleeve section 52, and the third sleeve section 53 can be formed into an integral setting, and the first sleeve section 51, the second sleeve section 52, and the third sleeve section 53 are provided with a mounting opening 55 along the axial direction. In this way, when installing, the mounting opening 55 is opened to sleeve the first sleeve section 51, the second sleeve section 52, and the third sleeve section 53 on the outer surface of the first fixing section 12, the second fixing section 13, and the third fixing section 14, respectively. In this way, the first sleeve section 51, the second sleeve section 52, and the third sleeve section 53 are respectively tightly matched with the first fixing section 12, the second fixing section 13, and the third fixing section 14 to fix the artificial blood vessel. In other embodiments, a fastener can be further provided in the second sleeve section 52, so that it can be more stable.

[0079] In addition, in other embodiments, the sleeve structure 5 further includes a fourth sleeve segment 54, which is installed at the end of the third sleeve segment 53, so that on the one hand, the third sleeve segment 53 can be fastened, and on the other hand, it is convenient to fix with the handle 4. The fourth sleeve segment 54 and the third sleeve segment 53 can be connected by internal and external threads, or by clamping, which is not specifically limited here.

[0080] Figure 6 and Figure 7 Schematic diagrams of the first sleeve section 51 and the third sleeve section 53 in another embodiment are shown respectively. Figure 6 and Figure 7 As shown, the first sleeve section 51 has a plurality of first flexible members 511 arranged circumferentially on the inner wall near the insertion head end 11; the third sleeve section 53 has a plurality of second flexible members 531 arranged circumferentially on the inner wall near the handle 4. In this way, the first sleeve section 51 and the third sleeve section 53 are in contact with the artificial blood vessel through the first flexible member 511 and the second flexible member 531 respectively, which can increase the fastening force on the one hand, and further prevent the artificial blood vessel from being damaged on the other hand when the flexible material contacts the blood vessel.

[0081] Figures 8 to 10The schematic diagram of the second section of the tunnel rod 2 is shown. The tunnel rod 2 has multiple types at the same outer diameter, including a straight type, an arc type, and a U type. The tunnel rod 2 has multiple different length specifications at the same outer diameter. The casing 3 of the same outer diameter can be adapted to the tunnel rod 2 of different length specifications (the casing 3 can be cut to length according to actual use). The tunnel rod 2 is at least partially inserted into the puncture head 1, and the tunnel rod 2 can be divided into a first section 21 and a second section 22. The first section 21 and the second section 22 are detachably connected together, for example, by internal and external thread connection, which can be the first section 21 with internal threads and the second section 22 with external threads; or the second section 22 with internal threads and the first section 21 with external threads. In this way, when setting different types of tunnel rods 2, only the second section 22 can be set to different types, such as a straight type, an arc type, and a U type. More specifically, the end of the second section 22 is connected to the inner wall of the puncture head 1 by a thread.

[0082] In addition, the puncture head 1 and the tunnel rod 2 are made of stainless steel. The casing 3 is made of a polymer material, such as polyethylene, polypropylene, polyvinyl chloride, polytetrafluoroethylene, polycarbonate, polystyrene, or ABS resin;

[0083] Specifically, the sleeve 3 is prepared by injection molding, 3D printing, melt extrusion, molding, blow molding, hot pressing, extrusion, etc. The sleeve 3 is sterilized by high temperature sterilization, moist heat sterilization, irradiation sterilization, and ethylene oxide sterilization.

[0084] In specific configuration, the sleeve 3 uses colors to distinguish different diameters, for example, colors that are easily distinguishable by the naked eye, such as red, blue, green, black, white, yellow, pink, orange, purple, etc.

[0085] Furthermore, the sleeve 3 can be made of a polymer material or a stainless steel material. When the sleeve 3 is made of a polymer material, it can be used once. When the sleeve 3 is made of a stainless steel material, it can be sterilized and used repeatedly.

[0086] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the present invention.

Claims

1. A medical subcutaneous tunnel device, characterized in that: include: The puncture head is provided in a cylindrical structure, one end of the puncture head is a closed end for piercing the skin, and the other end of the puncture head is provided in an open manner; A tunnel rod, at least partially accommodated in the cylindrical structure of the puncture head, and detachably fixed to the inner wall of the other end of the puncture head; A casing, which is sleeved on the tunnel rod, and the casing is made of polymer material or stainless steel; A handle connected to the end of the tunnel rod opposite to the puncture head; The sleeve structure is sleeved on the periphery of the puncture head to compress the artificial blood vessel when the artificial blood vessel is sleeved from one end of the puncture head.

2. The medical subcutaneous tunnel device according to claim 1, characterized in that: The first direction is the direction from the puncture head to the handle. The puncture head includes a puncture head end, a first fixed section, a second fixed section, and a third fixed section in sequence along the first direction. The puncture head end, the first fixed section, the second fixed section, and the third fixed section are connected in sequence. The puncture head end is arranged at the end of the first fixed section. The outer diameters of the first fixed section, the second fixed section, and the third fixed section are D1, D2, and D3, respectively, and D1>D2, and D3>D2; The inner surface of the sleeve structure is adapted to the shape of the outer surfaces of the first fixing section, the second fixing section and the third fixing section.

3. The medical subcutaneous tunnel device according to claim 2, characterized in that: The outer diameter of the first fixing section is gradually widened and then gradually narrowed along the first direction; the outer diameter of the third fixing section is gradually widened along the first direction; Correspondingly, the sleeve structure includes a first sleeve segment, a second sleeve segment, and a third sleeve segment in sequence along the first direction. The first sleeve segment, the second sleeve segment, and the third sleeve segment are connected in sequence, and the inner surfaces of the first sleeve segment, the second sleeve segment, and the third sleeve segment respectively match the shapes of the outer surfaces of the first fixed segment, the second fixed segment, and the third fixed segment.

4. The medical subcutaneous tunnel device according to claim 3, characterized in that: The maximum outer diameter of the first fixing section is set to be the same as the maximum outer diameter of the third fixing section.

5. The medical subcutaneous tunnel device according to claim 3, characterized in that: A plurality of first flexible members are arranged circumferentially on the inner wall of the first sleeve section close to the piercing head end; a plurality of second flexible members are arranged circumferentially on the inner wall of the third sleeve section close to the handle.

6. The medical subcutaneous tunnel device according to claim 3, characterized in that: The first fixing section and the second fixing section are detachably fixed together, and the second fixing section and the third fixing section are detachably fixed together; Correspondingly, the first sleeve section and the second sleeve section are detachably fixed together, and the second sleeve section and the third sleeve section are detachably fixed together.

7. The medical subcutaneous tunnel device according to claim 3, characterized in that: The first sleeve section, the second sleeve section, and the third sleeve section are provided with installation openings along the axial direction; During installation, the installation opening is opened to sleeve the first sleeve section, the second sleeve section, and the third sleeve section onto the outer surfaces of the first fixing section, the second fixing section, and the third fixing section, respectively.

8. The medical subcutaneous tunnel device according to claim 2, characterized in that: The piercing head end is arranged in a cone shape, and the outer diameter of the piercing head end is arranged to gradually widen along the first direction.

9. The medical subcutaneous tunnel device according to claim 8, characterized in that: The third fixing section is screwed together with the tunnel rod via internal threads and external threads.

10. The medical subcutaneous tunnel device according to claim 1, characterized in that: The tunnel rod has multiple types when the outer diameter is the same, including straight type, curved type, and U-type; The tunnel rod has a plurality of different length specifications when the outer diameter is the same; The casing with the same outer diameter can be adapted to the tunnel rods with different length specifications.

11. The medical subcutaneous tunnel device according to claim 1, characterized in that: The casing is colour-coded to identify different diameters.

12. The medical subcutaneous tunnel device according to claim 1, characterized in that: The sleeve is made of polyethylene, polypropylene, polyvinyl chloride, polytetrafluoroethylene, polycarbonate, polystyrene, or ABS resin.

13. The medical subcutaneous tunnel device according to claim 1, characterized in that: When the sleeve is made of polymer material, it can be used once; When the sleeve is made of stainless steel, it can be sterilized and used repeatedly.

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