Knee joint cartilage transplantation instrument

Abstract

The utility model discloses a knee joint cartilage transplantation instrument which comprises a holding part, a bone taking sheathing canal and a rod piece connecting the holding part and the bone taking sheathing canal, the rod piece is hollow, one end of the rod piece is provided with sawteeth to form a sawtooth end, the bone taking sheathing canal is arranged on the periphery of the sawtooth end in a sleeved mode and used for abutting against cartilage, and the sawtooth end is used for cutting the cartilage. A suction pipe at least partially located in the sawtooth end is further arranged in the rod piece, the suction pipe is provided with a suction part adaptive to the inner diameter of the sawtooth end, and the suction pipe is configured to move in the extending direction of the rod piece in a drivable mode so that the suction part can move in the sawtooth end and suck air in the sawtooth end. Compared with the prior art, the knee joint cartilage transplantation instrument has the advantages that bone taking can be completed without knocking, and injury to a patient caused by knocking is avoided.

Description

Technical Field

[0001] This utility model relates to a knee joint cartilage transplantation device, belonging to the field of medical devices. Background Technology

[0002] Articular cartilage has a very limited regenerative capacity, likely due to the lack of blood vessels and nerves in the tissue itself, as well as its nature of operating in a high-pressure, low-oxygen, and low-nutrient environment. Thick local cartilage damage increases the risk of developing osteoarthritis. Currently, clinical treatments for articular cartilage damage mainly include microfracture techniques, autologous cartilage transplantation, allogeneic cartilage transplantation, and chondrocyte transplantation.

[0003] Compared with other methods such as microfracture, font cartilage grafting can produce more hyaline cartilage-like repair tissue and has better clinical results. This technique has become one of the important surgical methods for treating knee cartilage lesions, and its clinical application has been expanded to treat cartilage injuries in other joints such as ankle, shoulder, hip, and wrist.

[0004] However, current surgical instruments have the following defects: (1) Cartilage is removed by striking the implanter with a hammer, but the edges of the removed cartilage are not neat, and the hammer strike can easily cause the cartilage to break. (2) It is not easy to locate the cartilage when striking the graft with a hammer, and it is easy to deviate from the intended area. (3) The impact of striking the graft with a hammer to remove cartilage is large, which can easily cause secondary soft tissue damage to the patient.

[0005] In view of this, it is indeed necessary to improve the existing knee cartilage transplantation devices to solve the above problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a knee joint cartilage transplantation device that can complete bone harvesting without knocking, thus avoiding the harm to the patient caused by knocking.

[0007] The technical solution of this utility model is:

[0008] A knee cartilage transplantation device includes a grip, a bone harvesting sheath, and a rod connecting the grip and the bone harvesting sheath. The rod is hollow and has serrations at one end to form a serrated end. The bone harvesting sheath is fitted around the outer periphery of the serrated end and is used to abut against the cartilage. The serrated end is used to cut the cartilage. The rod also has a suction tube located at least partially inside the serrated end. The suction tube has a suction portion adapted to the inner diameter of the serrated end. The suction tube is configured to be drivable and movable along the extension direction of the rod, so that the suction portion moves within the serrated end and draws air from the serrated end.

[0009] As a further improvement of this utility model, a rotating cylinder is sleeved on the side of the rod near the bone retrieval sheath. The rotating cylinder is connected to the suction tube and can rotate and move along the extension direction of the rod to drive the suction tube to move synchronously.

[0010] As a further improvement of this utility model, the suction tube is provided with a positioning post extending toward the rotating cylinder, and the rod is provided with a through hole. The positioning post passes through the through hole and is fixedly connected to the rotating cylinder, so that the rotating cylinder, the positioning post and the suction tube move in the same direction along the extension direction of the rod.

[0011] As a further improvement of this utility model, the outer periphery of the rod is provided with a first threaded portion, and the inner cavity of the rotating cylinder is provided with a corresponding second threaded portion. The first threaded portion and the second threaded portion cooperate with each other so that the rotating cylinder can rotate and move along the extension direction of the rod.

[0012] As a further improvement of this utility model, the suction tube is also provided with a groove, which is located between the positioning post and the suction part and is used to assemble the sealing element.

[0013] As a further improvement of this utility model, the sealing element is pressed and fixed in the groove by the rod and the suction tube.

[0014] As a further improvement of this utility model, the gripping part is detachably sleeved on the rod, and a disassembly cylinder is provided on the side of the rod near the gripping part. The disassembly cylinder is sleeved on the outer periphery of the gripping part and fixes the gripping part on the rod.

[0015] As a further improvement of this utility model, the gripping part includes an installation part that is clamped and fixed by the disassembly cylinder and the rod. The installation part is provided with a through groove, and the rod is provided with a corresponding installation groove. The through groove and the installation groove are interconnected and together assemble a positioning bead. The disassembly cylinder restricts the positioning bead within the through groove and the installation groove.

[0016] As a further improvement of this utility model, the inner wall surface of the disassembly cylinder is provided with a positioning block protruding toward the positioning bead, and a receiving groove formed on the side of the positioning block. The disassembly cylinder can be rotatably moved along the extension direction of the rod to restrict the positioning bead in the through groove and the mounting groove by the positioning block, so that the gripping part is in a non-removable state; or it can be moved until the receiving groove is directly opposite the positioning bead. At this time, the gripping part is in a detachable state. When the gripping part is disassembled, it drives the mounting part to move in the same direction, so that the positioning bead is dislodged and received in the receiving groove.

[0017] As a further improvement of this utility model, an elastic element is provided between the disassembly cylinder and the mounting part. The elastic element extends in the same direction as the extension direction of the rod and is located on the moving path of the positioning block relative to the rod.

[0018] The beneficial technical effects of this utility model are as follows: This utility model provides a knee cartilage transplantation device by setting serrations at one end of a hollow rod to form a serrated end, and then fitting a bone harvesting sheath around the outer periphery of the serrated end to abut against the cartilage. The serrated end is used to cut the cartilage. The rod also has a suction tube, at least partially located inside the serrated end, with a suction section adapted to the inner diameter of the serrated end. The suction tube is configured to be drivable and move along the extension direction of the rod, allowing the suction section to move within the serrated end and draw air from it, thereby extracting the cartilage cut by the serrated end into the rod, completing the cartilage harvesting operation without the need for hammering, thus avoiding injury to the patient from hammering and the problem of hammering deviating from the intended area. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a knee cartilage transplantation device according to a preferred embodiment of the present utility model.

[0020] Figure 2 yes Figure 1 An exploded view showing the hidden grip section.

[0021] Figure 3 yes Figure 2 A schematic diagram of the suction tube.

[0022] Figure 4 yes Figure 1 An exploded view of a knee cartilage transplant device is shown.

[0023] Figure 5 yes Figure 1 Cross-sectional view of the disassembly cylinder area.

[0024] Figure 6 yes Figure 1 The diagram shows a knee cartilage transplantation device equipped with another gripping part. Detailed Implementation

[0025] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0026] Please see Figures 1 to 6As shown, this utility model discloses a knee joint cartilage transplantation device 100, including a gripping part 1, a bone harvesting sheath 2, and a rod 3 connecting the gripping part 1 and the bone harvesting sheath 2. One end of the rod 3 is provided with serrations to form a serrated end 31. The bone harvesting sheath 2 is sleeved on the outer periphery of the serrated end 31 and is used to abut against the cartilage. The serrated end 31 is used to cut the cartilage. The rod 3 also has a suction tube 4 located at least partially inside the serrated end 31. The suction tube 4 has a suction part 41 adapted to the inner diameter of the serrated end 31. The suction tube 4 is configured to be drivable and move along the extension direction of the rod 3 so that the suction part 41 moves within the serrated end 31 and draws air from the serrated end 31.

[0027] Preferably, in the extending direction of the rod 3, the bone harvesting sheath 2 at least partially covers the serrated end 31, that is, the serrated end 31 is located inside the bone harvesting sheath 2. When the bone harvesting sheath 2 abuts against the cartilage, the bone harvesting sheath 2 is squeezed forcefully, causing the cartilage portion to enter the interior of the bone harvesting sheath 2 for cutting by the serrated end 31. After the serrated end 31 cuts the cartilage, the suction tube 41 is moved so that the suction part 41 can move within the serrated end 31 to draw in the air, thereby completely sucking the cut cartilage into the interior of the rod 3. At this point, the cartilage can be removed, or it can be moved directly to the location where cartilage needs to be inserted, and the suction part 41 is pushed to push the cartilage out of the serrated end 31 by airflow.

[0028] In this embodiment, the serrated end 31 also has a scale, which can be used to measure the volume of cartilage extracted. In contrast, the bone extraction sheath 2 is made of a transparent material so that the scale can be observed.

[0029] A rotating cylinder 5 is fitted onto the side of the rod 3 near the bone retrieval sheath 2. The rotating cylinder 5 is connected to the suction tube 4 and can rotate and move along the extension direction of the rod 3 to drive the suction tube 4 to move synchronously. In other words, the rotating cylinder 5 acts as a knob switch to drive the suction of the suction tube 4.

[0030] Preferably, the outer periphery of the rod 3 is provided with a first threaded portion 30, and the inner cavity of the rotating cylinder 5 is correspondingly provided with a second threaded portion 50. The first threaded portion 30 and the second threaded portion 50 cooperate with each other to allow the rotating cylinder 5 to rotate and move along the extension direction of the rod 3. That is, the first threaded portion 30 and the second threaded portion 50 are internal and external threads, and the rotation of the rotating cylinder 5 and its movement relative to the rod 3 can be realized through the cooperation of the internal and external threads.

[0031] The suction tube 4 is provided with a positioning post 42 extending toward the rotating cylinder 5. The rod 3 is provided with a through hole 32. The positioning post 42 passes through the through hole 32 and is fixedly connected to the rotating cylinder 5 so that the rotating cylinder 5, the positioning post 42 and the suction tube 4 move in the same direction along the extension direction of the rod 3.

[0032] The suction tube 4 is also provided with a groove 43, which is located between the positioning post 42 and the suction part 41, and is used to assemble the sealing element 6. The sealing element 6 is pressed and fixed in the groove 43 by the rod 3 and the suction tube 4. That is, the sealing element 6 prevents air from flowing into the serrated end 31, thereby reducing the suction effect of the suction part 41 at the serrated end 31.

[0033] The gripping part 1 is detachably sleeved on the rod 3. A disassembly cylinder 7 is also provided on the side of the rod 3 near the gripping part 1. The disassembly cylinder 7 is sleeved around the outer periphery of the gripping part 1 and fixes the gripping part 1 to the rod 3. In other words, the disassembly cylinder 7 serves as a fixing member for the gripping part 1 to be detachably connected to the rod 3. By adjusting the disassembly cylinder 7, the gripping part 1 can be disassembled or installed.

[0034] The gripping part 1 includes a mounting part 11 that is clamped and fixed by the disassembly cylinder 7 and the rod 3. The mounting part 11 has a through groove 10, and the rod 3 has a corresponding mounting groove 33. The through groove 10 and the mounting groove 33 are interconnected and together assemble a positioning bead 8. The disassembly cylinder 7 confines the positioning bead 8 within the through groove 10 and the mounting groove 33. Therefore, the mounting part 11 and the rod 3 are fixedly connected by the disassembly cylinder 7 and the positioning bead 8, making them impossible to disassemble.

[0035] The inner wall of the disassembly cylinder 7 is provided with a positioning block 71 protruding toward the positioning bead 8, and a receiving groove 72 formed beside the positioning block 71. The disassembly cylinder 7 can be rotatably moved along the extension direction of the rod 3 to restrict the positioning bead 8 within the through groove 10 and the mounting groove 33 by the positioning block 71, so that the gripping part 1 is in a non-removable state; or it can be moved until the receiving groove 72 is directly opposite the positioning bead 8. At this time, the gripping part 1 is in a detachable state. When the gripping part 1 is disassembled, the mounting part 11 moves in the same direction, so that the positioning bead 8 is dislodged and received in the receiving groove 72. Preferably, there are multiple through grooves 10, mounting grooves 33, positioning beads 8 and receiving grooves 72 to fix the mounting part 11 to the rod 3 in all directions.

[0036] In this embodiment, the mounting part 11 is provided with a third threaded part 110, and the disassembly cylinder 7 is provided with a corresponding fourth threaded part inside. The third threaded part 110 and the fourth threaded part cooperate with each other so that the disassembly cylinder 7 can rotate and move relative to the extension direction of the rod 3.

[0037] Preferably, an elastic element 9 is further provided between the disassembly cylinder 7 and the mounting part 11. The elastic element 9 extends in the same direction as the extension direction of the rod 3 and is located on the movement path of the positioning block 71 relative to the rod 3. The elastic element 9 is located on the side of the positioning block 71 closer to the gripping part 1. By providing the elastic element 9, the disassembly cylinder 7 is prevented from deviating when restricting the positioning bead 8, thereby preventing the positioning bead 8 from coming out, and making the gripping part 1 detachable when not necessary.

[0038] In addition, such as Figure 1 and Figure 6 As shown, by setting the disassembly cylinder 7 and the positioning bead 8, the knee cartilage transplantation device 100 can be connected to different types of grip parts 1 to adapt to the habits of different doctors.

[0039] In summary, the knee cartilage transplantation device 100 of this utility model has a serrated end 31 formed by serrulating one end of a hollow rod 3, and a bone harvesting sheath 2 is sleeved on the outer periphery of the serrated end 31 to abut against the cartilage. The serrated end 31 is used to cut the cartilage. The rod 3 also has a suction tube 4 located at least partially inside the serrated end 31. The suction tube 4 has a suction part 41 adapted to the inner diameter of the serrated end 31. The suction tube 4 is configured to be drivable and move along the extension direction of the rod 3, so that the suction part 41 moves inside the serrated end 31 and draws air from the serrated end 31, thereby absorbing the cartilage cut by the serrated end 31 into the rod 3, completing the cartilage harvesting operation without the need for hammering, avoiding injury to the patient from hammering, and avoiding the problem of hammering deviating from the predetermined area.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A knee cartilage implant device, characterized by, The device includes a gripping part, a bone harvesting sheath, and a rod connecting the gripping part and the bone harvesting sheath. The rod is hollow and has serrations at one end to form a serrated end. The bone harvesting sheath is fitted around the outer periphery of the serrated end and is used to abut against cartilage. The serrated end is used to cut the cartilage. The rod also has a suction tube located at least partially inside the serrated end. The suction tube has a suction portion adapted to the inner diameter of the serrated end. The suction tube is configured to be drivable and movable along the extension direction of the rod, so that the suction portion moves within the serrated end and draws air from within the serrated end.

2. The knee cartilage transplantation device according to claim 1, wherein A rotating cylinder is fitted on the side of the rod near the bone harvesting sheath. The rotating cylinder is connected to the suction tube and can rotate along the extension direction of the rod to drive the suction tube to move synchronously.

3. The knee cartilage transplantation device according to claim 2, wherein The suction tube is provided with a positioning post extending toward the rotating cylinder, and the rod is provided with a through hole. The positioning post passes through the through hole and is fixedly connected to the rotating cylinder so that the rotating cylinder, the positioning post and the suction tube move in the same direction along the extension direction of the rod.

4. The knee cartilage transplantation device according to claim 2, wherein The rod has a first threaded portion on its outer periphery, and the rotating cylinder has a corresponding second threaded portion inside. The first threaded portion and the second threaded portion cooperate with each other to allow the rotating cylinder to rotate and move along the extension direction of the rod.

5. The knee cartilage transplantation device according to claim 3, characterized in that, The suction tube is also provided with a groove, which is located between the positioning post and the suction part and is used to assemble the sealing element.

6. The knee cartilage transplantation device according to claim 5, wherein The seal is pressed and fixed within the groove by the rod and the suction tube.

7. The knee cartilage transplantation device according to claim 1, wherein The gripping part is detachably sleeved on the rod, and the side of the rod near the gripping part is also provided with a disassembly cylinder, which is sleeved on the outer periphery of the gripping part and fixes the gripping part on the rod.

8. The knee cartilage transplantation device according to claim 7, wherein The gripping part includes an installation part that is clamped and fixed by the disassembly cylinder and the rod. The installation part is provided with a through groove, and the rod is provided with a corresponding installation groove. The through groove and the installation groove are interconnected and together assemble a positioning bead. The disassembly cylinder restricts the positioning bead within the through groove and the installation groove.

9. The knee cartilage transplantation device according to claim 8, wherein The inner wall of the disassembly cylinder is provided with a positioning block protruding toward the positioning bead, and a receiving groove formed beside the positioning block. The disassembly cylinder can be rotatably moved along the extension direction of the rod to restrict the positioning bead in the through groove and the mounting groove by the positioning block, so that the gripping part is in a non-removable state; or it can be moved until the receiving groove is directly opposite the positioning bead. At this time, the gripping part is in a detachable state. When the gripping part is disassembled, it drives the mounting part to move in the same direction, so that the positioning bead is dislodged and received in the receiving groove.

10. The knee cartilage transplantation device according to claim 9, wherein An elastic element is also provided between the disassembly cylinder and the mounting part. The elastic element extends in the same direction as the extension direction of the rod and is located on the movement path of the positioning block relative to the rod.

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