Patella inferior pole kirschner wire introducer
By designing an instrument for inserting the inferior patella Chrissian needle, the problem of direction deviation and prolonged surgical time during inserting the Krissian needle in patella fracture surgery is solved, and the one-time accurate placement of the Krissian needle and the shortening of the surgical time is achieved.
Patent Information
- Application Number
- CN202420815638.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-04-19
AI Technical Summary
During patella fracture surgery, the insulator of the inferior patella Chrissor is prone to problems such as direction deviation, multiple nail placement and prolonged operation time, and the technical requirements for the operator are high.
A lower patella needle inserter is designed, including a main rod, a secondary rod, a connecting cross rod and a rotatable secondary rod. The patella is clamped by the first hook tip, a lift and a cylindrical projection, and the direction of the Knight needle is adjusted by a preset Knight needle direction and a second perforation of the elliptical structure to ensure its accuracy.
It realizes one-time and accurate placement of the inferior patella needle, which reduces the surgical time and operation complexity, and reduces the technical requirements of the doctor.
Smart Images
Figure CN222815852U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical instruments, in particular to a patellar inferior pole Kirschner wire inserter. Background Art
[0002] The patella is the largest sesamoid bone in the human body. It, together with ligaments and aponeurosis, forms a knee flexion structure. The patella is located superficially and is more susceptible to fractures caused by external impact or excessive movement. If the fracture is not treated promptly and effectively, it may have a certain impact on the movement of the knee joint, easily cause complications or cause people to lose their ability to move. Therefore, after a patellar fracture, its integrity should be restored as much as possible. In recent decades, tension bands have been the most widely used and accepted method. As an internal fixation during surgery, the tension on the surface of the quadriceps and the patella is converted into pressure on the articular surface, increasing the stability of the fracture ends. The principle of the tension band is to convert tension into pressure, thereby achieving dynamic inter-fragment compression, which is in line with the characteristics of patellar biomechanics. The fixation is simple and reliable, the volume is small, and early functional exercise can be performed after surgery. At the same time, it also has the function of pressurizing the fracture and improving the healing rate of the fracture.
[0003] During the installation of the patellar tension band, two Kirschner wires must be drilled in first, and then fixed with steel wire in an 8-shaped pattern. The shape of the patella is similar to a semi-ellipse, so the upper and lower poles of the patella are "arc-shaped, narrow, and smooth". When inserting the Kirschner wire, it needs to be close to the patellar articular surface, which is easy to slip and difficult to place stably. Below the patella is the calf, and there is a raised tibial tubercle at the proximal end, which will block the electric drill and make it difficult to control the direction. The proximal end of the patella is buried under the quadriceps femoris, and the accuracy of the Kirschner wire direction is difficult to control. It is often necessary to repeatedly place the nails, or there is a deviation in the direction after the nail is placed, which affects the effect. In particular, for cases of comminuted fractures of the lower pole of the patella, it is more necessary to improve the accuracy and place the nails at one time, otherwise it is easy to cause the fracture fragments to break and the fixation effect to decrease. Therefore, when drilling the Kirschner wire into the patella without auxiliary tools, it is easy to have problems such as direction deviation, multiple nail placement, and increased operation time, and it has high technical requirements for the operating doctor. Utility Model Content
[0004] The utility model aims to overcome the above technical problems and provide a patellar inferior pole Kirschner wire inserter.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a patellar inferior pole Kirschner wire inserter, comprising a main rod, a secondary rod, a connecting cross rod, and a secondary rod, wherein the main rod and the secondary rod are arranged opposite to each other, the connecting cross rod is arranged between the main rod and the secondary rod, the two ends of the connecting cross rod are fixedly connected to the main rod and the secondary rod respectively, the secondary rod is rotatably arranged at the rear end of the main rod, the front end of the secondary rod is provided with a columnar protrusion and a supporting portion for supporting the inferior pole of the patella, the columnar protrusion is provided with a through hole, the front end of the main rod is provided with a first through hole, the first through hole is arranged opposite to the through hole, the rear end of the main rod is provided with a second through hole, the front end of the secondary rod is provided with a third through hole, and the rear end of the secondary rod is provided with a fourth through hole, wherein the front end of the main rod is provided with a first hook tip portion, and the first hook tip portion, the front end of the main rod, the supporting portion, and the columnar protrusion cooperate to clamp the patella.
[0006] Furthermore, it also includes a rotating device, which is arranged between the secondary rod and the main rod.
[0007] Furthermore, the rotating device includes a first rotating hole, a second rotating hole, and a rotating shaft. The first rotating hole is arranged on the main rod, the second rotating hole is arranged on the secondary rod, and the rotating shaft passes through the first rotating hole and the second rotating hole.
[0008] Furthermore, the second perforation has an elliptical structure.
[0009] Furthermore, a second hook tip portion is provided at the front end of the auxiliary rod.
[0010] Further, the first perforations include two, the two first perforations are arranged at intervals, the second perforation of the elliptical structure is arranged opposite to the two first perforations, and the through hole includes two, the two through holes are arranged at intervals, and the second perforation of the elliptical structure is arranged opposite to the two through holes.
[0011] Furthermore, a center line of the third through hole coincides with a center line of the fourth through hole.
[0012] Furthermore, the third perforations include two, and the two third perforations are arranged at intervals, and the fourth perforations include two, and the two fourth perforations are arranged at intervals.
[0013] Further, the first through-hole and the third through-hole are arranged opposite to each other, and the second through-hole and the fourth through-hole are arranged opposite to each other.
[0014] It can be seen from the above description of the utility model that, compared with the prior art, the utility model provides a patellar inferior pole Kirschner wire inserter with the following advantages: a main rod and a sub-rod are provided, the front end of the main rod is provided with a first hook tip portion, the main rod and the sub-rod are arranged oppositely, the main rod is an operating rod for drilling the Kirschner wire, the sub-rod is an aiming rod for presetting the direction of the Kirschner wire, a connecting cross bar is provided between the main rod and the sub-rod, a rotatable sub-rod is provided at the rear end of the main rod, a columnar protrusion and a supporting portion for supporting the inferior pole of the patella are provided at the front end of the sub-rod, a through hole is provided at the columnar protrusion, a first through hole is provided at the front end of the main rod, the first through hole is arranged opposite to the through hole, a second through hole is provided at the rear end of the main rod, a third through hole is provided at the front end of the sub-rod, and a fourth through hole is provided at the rear end of the sub-rod. When in use, first use the first hook tip, the front end of the main rod, the supporting part, and the columnar protrusion to clamp the patella together, then pass the Kirschner wire through the third perforation and the fourth perforation, preset the direction of the Kirschner wire, and finally pass the Kirschner wire to be operated through the second perforation and the through hole. Since the second perforation is an elliptical structure, the direction of the Kirschner wire can be adjusted through the second perforation of the elliptical structure to make it consistent with the preset Kirschner wire direction, thereby ensuring the accuracy of the direction of the Kirschner wire. At the same time, the direction of the Kirschner wire only needs to be accurate, and it may or may not pass through the first perforation. Therefore, inserting the Kirschner wire through the patellar inferior pole Kirschner wire inserter can achieve the surgical effect of drilling the Kirschner wire once, while reducing the operation time and reducing the doctor's operating technical requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 The utility model is an exploded view of the patellar inferior pole Kirschner wire inserter.
[0016] Figure 2 The utility model is a schematic diagram of the overall structure of the patellar inferior pole Kirschner wire inserter.
[0017] Figure 3 The utility model is a schematic diagram of the use state of the patellar inferior pole Kirschner wire inserter. DETAILED DESCRIPTION
[0018] The following will clearly and completely describe the technical solutions in the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present utility model.
[0019] Reference Figure 1-Figure 3As shown, a patellar inferior pole Kirschner wire inserter comprises a main rod 1, a secondary rod 2, a connecting cross rod 3, and a secondary rod 4. The main rod 1 is an operating rod for Kirschner wire drilling, and the secondary rod 2 is an aiming rod for presetting the direction of the Kirschner wire. The main rod 1 and the secondary rod 2 are arranged opposite to each other, the connecting cross rod 3 is arranged between the main rod 1 and the secondary rod 2, and the two ends of the connecting cross rod 3 are respectively fixedly connected to the main rod 1 and the secondary rod 2. The secondary rod 4 is rotatably arranged at the rear end of the main rod 1, and the front end of the secondary rod 4 is provided with a columnar protrusion 41 and a supporting portion 42 for supporting the inferior pole of the patella. The columnar protrusion 41 is provided with a through hole 411, and the front end of the main rod 1 is provided with a first through hole 11, which is arranged opposite to the through hole 411. The rear end of the main rod 1 is provided with a second through hole 12, the front end of the secondary rod 2 is provided with a third through hole 21, and the rear end of the secondary rod 2 is provided with a fourth through hole 22.
[0020] Among them, the front end of the main rod 1 is provided with a first hook tip portion 13, the first hook tip portion 13, the front end of the main rod 1, the supporting portion 42, and the columnar protrusion 41 cooperate to clamp the patella, the third perforation 21 and the fourth perforation 22 are used for the Kirschner wire to pass through, thereby presetting the direction of the Kirschner wire, the second perforation 12 and the through hole 411 are used for the Kirschner wire to be operated to pass through, and at the same time, the direction of the Kirschner wire can be adjusted to make it consistent with the preset Kirschner wire direction, thereby ensuring the direction of the Kirschner wire to be operated is accurate, thereby achieving the surgical effect of drilling the Kirschner wire once, reducing the operation time, and reducing the doctor's operating technical requirements.
[0021] A rotating device 5 is provided between the secondary rod 4 and the primary rod 1, and the secondary rod 4 is rotatably connected to the primary rod 1 through the rotating device 5. The rotating device 5 includes a first rotating hole 51, a second rotating hole 52, and a rotating shaft 53, wherein the first rotating hole 51 is provided on the primary rod 1, the second rotating hole 52 is provided on the secondary rod 4, and the rotating shaft 53 is passed through the first rotating hole 51 and the second rotating hole 52.
[0022] The second through hole 12 is in an elliptical structure, which is convenient for adjusting the direction of the Kirschner wire to be operated.
[0023] The front end of the auxiliary rod 2 is provided with a second hook tip portion 23 .
[0024] The first through-holes 11 include two, the two first through-holes 11 are arranged at intervals, the second through-hole 12 of the elliptical structure is arranged opposite to the two first through-holes 11, and the through-holes 411 include two, the two through-holes 411 are arranged at intervals, and the second through-hole 12 of the elliptical structure is arranged opposite to the two through-holes 411. Specifically, due to the structural characteristics of the upper and lower poles of the patella, and the Kirschner wire is relatively thick, generally 1.5 mm, it is more appropriate to design only two first through-holes 11 and the through-hole 411.
[0025] The center line of the third through hole 21 coincides with the center line of the fourth through hole 22. The third through holes 21 include two, and the two third through holes 21 are arranged at intervals. The fourth through holes 22 include two, and the two fourth through holes 22 are arranged at intervals.
[0026] The first through hole and the third through hole are arranged opposite to each other, and the second through hole and the fourth through hole are arranged opposite to each other.
[0027] When in use, the surgeon first repositions the patella, then takes the patellar inferior pole Kirschner wire inserter, inserts the supporting portion 42 of the secondary rod 4 into the inferior pole of the patella through the patellar tendon fiber gap until the columnar protrusion 41 is clamped; then the first hook tip 13 at the front end of the main rod 1 passes through the tendon fiber gap and clamps on the superior pole of the patella. After the position of the main rod 1 is fixed, the Kirschner wire is passed through the third perforation 21 and the fourth perforation 22 of the secondary rod 2, and the direction of the Kirschner wire is preset; finally, the Kirschner wire to be operated is passed through the second perforation 12 and into the through hole 411 of the columnar protrusion 41, and then the Kirschner wire is adjusted up and down to make it consistent with the preset Kirschner wire direction, and then passed out of the superior pole of the patella. Because the purpose of this design is to accurately place the Kirschner wire in the patella, the Kirschner wire to be operated is inserted through the second perforation 12 and the through hole 411 of the columnar protrusion 41 according to the preset direction of the Kirschner wire, and only the direction is required to be accurate, and it is not required to pass through the first perforation 11. The first perforation 11 is the ideal exit point. After the direction is accurate, the device is removed and verified by fluoroscopic examination.
[0028] The above are only some specific implementation methods of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.
Claims
1. A patellar inferior pole Kirschner wire inserter, characterized in that: The invention comprises a main rod, a subsidiary rod, a connecting cross rod and a secondary rod, wherein the main rod is arranged opposite to the subsidiary rod, the connecting cross rod is arranged between the main rod and the subsidiary rod, the two ends of the connecting cross rod are respectively fixedly connected to the main rod and the subsidiary rod, the secondary rod is rotatably arranged at the rear end of the main rod, the front end of the secondary rod is provided with a columnar protrusion and a supporting portion for supporting the lower pole of the patella, the columnar protrusion is provided with a through hole, the front end of the main rod is provided with a first through hole, the first through hole is arranged opposite to the through hole, the rear end of the main rod is provided with a second through hole, the front end of the subsidiary rod is provided with a third through hole, and the rear end of the subsidiary rod is provided with a fourth through hole, wherein the front end of the main rod is provided with a first hook tip portion, and the first hook tip portion, the front end of the main rod, the supporting portion and the columnar protrusion cooperate to clamp the patella.
2. The patellar inferior pole Kirschner wire inserter according to claim 1, characterized in that: It also includes a rotating device, which is arranged between the secondary rod and the main rod.
3. The patellar inferior pole Kirschner wire inserter according to claim 2, characterized in that: The rotating device comprises a first rotating hole, a second rotating hole, and a rotating shaft. The first rotating hole is arranged on the main rod, the second rotating hole is arranged on the secondary rod, and the rotating shaft passes through the first rotating hole and the second rotating hole.
4. The patellar inferior pole Kirschner wire inserter according to claim 3, characterized in that: The second through hole has an elliptical structure.
5. The patellar inferior pole Kirschner wire inserter according to claim 4, characterized in that: The front end of the auxiliary rod is provided with a second hook tip portion.
6. The patellar inferior pole Kirschner wire inserter according to claim 5, characterized in that: The first perforations include two, the two first perforations are arranged at intervals, the second perforation of the elliptical structure is arranged opposite to the two first perforations, and the through hole includes two, the two through holes are arranged at intervals, and the second perforation of the elliptical structure is arranged opposite to the two through holes.
7. The patellar inferior pole Kirschner wire inserter according to claim 6, characterized in that: A center line of the third through hole coincides with a center line of the fourth through hole.
8. The patellar inferior pole Kirschner wire inserter according to claim 7, characterized in that: The third perforations include two, and the two third perforations are arranged at intervals. The fourth perforations include two, and the two fourth perforations are arranged at intervals.
9. The patellar inferior pole Kirschner wire inserter according to claim 8, characterized in that: The first through hole and the third through hole are arranged opposite to each other, and the second through hole and the fourth through hole are arranged opposite to each other.