Pedicle puncture cannula and pedicle puncture trocar
By adding reference racks and marking balls to the vertebral bow root puncture sleeve and pins, the navigation positioning is achieved, the problem of frequent X -ray perspective during the sport screw of the vertebral arch was reduced, reducing radiation exposure, improving the accuracy of surgery accurate surgery Sexual and efficiency.
Patent Information
- Application Number
- CN202322872382.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-25
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2033-10-25
AI Technical Summary
In pedicle screw insertion, the prior art requires frequent use of X-rays to determine the placement position, resulting in long-term, high-dose radiation exposure of patients and doctors.
Designed a pedicle puncture cannula and trocar, added a reference frame and a marking ball, tracked the tip of the trocar through the navigation system, displayed the relative position relationship in real time, reduced the number of X-ray fluoroscopy, and designed a detachable handle and tube body for replacement.
Through the navigation positioning of the reference rack and the marking ball, the nail position and depth can be accurately found under minimally invasive conditions, reducing the number of X -ray see -through times during surgery, reducing radiation exposure, and improving the safety and efficiency of surgery.
Smart Images
Figure CN222383331U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of orthopedic navigation surgical instruments, in particular to a pedicle puncture sleeve and a pedicle puncture sleeve needle. Background Art
[0002] Percutaneous pedicle screw placement is widely used in minimally invasive spinal surgery and is one of the techniques that spinal surgeons must master. Compared with traditional open surgery, this technology can achieve the same effect. Because of its small trauma, less pain for patients, and faster recovery, it has been rapidly developed and clinically applied at home and abroad in recent years.
[0003] This technology uses a pedicle puncture trocar during surgery. The pedicle puncture trocar usually includes an outer sleeve and a needle core located inside the outer sleeve. In traditional surgery, the doctor uses the pedicle puncture trocar to drill a hole in the patient's pedicle based on experience, then pulls out the needle core and fixes the Kirschner wire on the patient's pedicle along the inner hole of the outer sleeve to determine the insertion position of the pedicle screw.
[0004] In clinical practice, in order to accurately determine the insertion position of pedicle screws, doctors need to perform positioning, puncture, repeatedly adjust the puncture point, repeatedly adjust the puncture angle, insert pedicle screws, etc. under the guidance of X-rays. This process requires repeated anteroposterior and lateral fluoroscopy, which exposes patients and doctors to long-term and high-dose radiation. Utility Model Content
[0005] The technical problem to be solved by the utility model is to provide a pedicle puncture sleeve and a pedicle puncture trocar which can reduce the number of X-ray fluoroscopy times during surgery and easily determine the insertion position.
[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:
[0007] On the one hand, a pedicle puncture cannula is provided, comprising a hollow tube body, a handle is provided at the upper end of the tube body, a connecting shaft is provided on the side of the handle, a reference frame is provided at the end of the connecting shaft, at least 3 marking balls are provided on the reference frame, and the tube body is detachably connected to the handle.
[0008] Furthermore, a first mounting hole for installing a connecting shaft is provided in the middle of the reference frame, and a limiting boss for abutting against the back of the reference frame is provided at one end of the connecting shaft close to the reference frame, and a first nail hole is provided on the end surface of the end, a fixing nail is provided in the first nail hole, and a nail cap of the fixing nail is used to abut against the front of the reference frame to fix the reference frame and the connecting shaft together.
[0009] Furthermore, a first key slot is provided on the side wall of the first mounting hole, a second key slot is provided on one end of the connecting shaft close to the reference frame, and key pins are inserted into the first key slot and the second key slot.
[0010] Furthermore, a second mounting hole is provided on the side of the handle, and an end of the connecting shaft away from the reference frame is provided with a step surface for abutting against the end surface of the second mounting hole, and this end of the connecting shaft is installed in the second mounting hole and fixed by a pin.
[0011] Furthermore, an insertion hole is provided in the middle of the bottom surface of the handle, the upper end of the tube body is inserted into the insertion hole, limiting lugs are provided on both sides of the upper end of the tube body for abutting against the bottom surface of the handle, and a receiving groove is also provided in the middle of the bottom surface of the handle for accommodating the limiting lugs.
[0012] Furthermore, a second nail hole is provided on the limiting lug, a third nail hole is provided on the bottom surface of the handle at a position corresponding to the second nail hole, and fixing nails are inserted into the second nail hole and the third nail hole;
[0013] And / or, a first plane is provided on a portion of the tube body above the limiting lug, and a second plane matching the first plane is provided in the second plug hole.
[0014] Furthermore, a slot is provided in the upper middle portion of the handle, the upper end of the tube body passes through the plug hole and extends into the slot, and the portion of the tube body located in the slot is provided with an external thread.
[0015] Furthermore, the lower end of the tube body is provided with an inclined surface to form an eccentric puncture end deviating from the axis of the tube body;
[0016] And / or, a threaded section is provided at the lower portion of the tube body.
[0017] Further, the reference frame is parallel to the tube body;
[0018] And / or, the tube body is provided with scales.
[0019] On the other hand, a pedicle puncture trocar is provided, comprising a cannula and a needle core located in the cannula, wherein the cannula is the pedicle puncture cannula mentioned above.
[0020] The utility model has the following beneficial effects:
[0021] The pedicle puncture cannula and pedicle puncture trocar of the utility model, on the one hand, add a reference frame to the traditional pedicle puncture cannula / trocar. When the doctor uses it, the position of the marker ball on the reference frame in space is tracked under the navigation system to track the tip of the pedicle puncture trocar. During the operation, the relative position relationship of the pedicle puncture trocar with respect to the patient's spine can be displayed in real time, so that the doctor can accurately find the screw placement position and assist in determining the screw placement depth under minimally invasive conditions. On the other hand, a handle matching the tube body is designed, and the tube body can be detachably connected to the handle, so the tube body can be easily disassembled and replaced to solve the problem that the tube body is easy to break in actual use. The utility model performs navigation positioning by using the marker ball on the reference frame, which can reduce the number of X-ray fluoroscopy times during the operation and easily determine the insertion position and depth. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the overall structure of the pedicle puncture trocar of the utility model;
[0023] Figure 2 for Figure 1 Side view of
[0024] Figure 3 for Figure 1 A front cross-sectional view of
[0025] Figure 4 for Figure 1 Schematic diagram of the combined structure of the central reference frame and the connecting axis;
[0026] Figure 5 for Figure 1 A schematic diagram of the structure of the middle tube body;
[0027] Figure 6 for Figure 1 Schematic diagram of the bottom structure of the middle handle;
[0028] Figure 7 It is a schematic diagram of the lower end structure of an improved embodiment of the pedicle puncture cannula of the utility model. DETAILED DESCRIPTION
[0029] In order to make the technical problems to be solved, technical solutions and advantages of the present invention more clear, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.
[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0031] On the one hand, the utility model provides a pedicle puncture cannula, such as Figure 1-6 As shown, it includes a hollow tube body 1, a handle 2 is provided at the upper end of the tube body 1, a connecting shaft 3 is provided on the side of the handle 2, a reference frame 4 is provided at the end of the connecting shaft 3, at least three marking balls 41 are provided on the reference frame 4, and the tube body 1 is detachably connected to the handle 2.
[0032] The pedicle puncture cannula of the utility model, on the one hand, adds a reference frame to the traditional pedicle puncture cannula / trocar. When the doctor uses it, the position of the marker ball on the reference frame in space is used to track the tip of the pedicle puncture trocar under the navigation system (the overall size of the trocar is known, so the spatial distance from the marker ball to the tip of the trocar is known). During the operation, the relative position relationship of the pedicle puncture trocar with respect to the patient's spine can be displayed in real time, so that the doctor can accurately find the screw placement position and assist in determining the screw placement depth under minimally invasive conditions; on the other hand, a handle matching the tube body is designed, and the tube body can be detachably connected to the handle, so the tube body can be easily disassembled and replaced to solve the problem that the tube body is easy to break in actual use. The utility model uses the marker ball on the reference frame for navigation and positioning, which can reduce the number of X-ray fluoroscopy during the operation and easily determine the insertion position and depth.
[0033] like Figure 1-4 As shown, in order to facilitate the connection between the reference frame 4 and the connecting shaft 3, the middle part of the reference frame 4 can be provided with a first mounting hole 42 for mounting the connecting shaft 3, and one end of the connecting shaft 3 close to the reference frame 4 is provided with a back side of the reference frame 4 ( Figure 1 The limiting boss 31 is provided on the end face of the reference frame 4 (right side) and a first nail hole is provided in the end face of the reference frame 4. A fixing nail 32 is provided in the first nail hole. The nail cap of the fixing nail 32 is used to abut against the front face of the reference frame 4 ( Figure 1 The reference frame 4 and the connecting shaft 3 are fixed together (on the left side in the middle), so that the reference frame 4 and the connecting shaft 3 can be firmly connected.
[0034] Furthermore, a first key slot (not shown) may be provided on the side wall of the first mounting hole 42, and a second key slot (not shown) may be provided on the end of the connecting shaft 3 close to the reference frame 4. Key pins 33 may be inserted into the first key slot and the second key slot. The key pins 33 may prevent the reference frame 4 and the connecting shaft 3 from rotating relative to each other, thereby improving the stability of both.
[0035] To facilitate the connection between the connecting shaft 3 and the handle 2, a second mounting hole 21 can be provided on the side of the handle 2, and the end of the connecting shaft 3 away from the reference frame 4 is provided with a step surface 34 for abutting against the end surface of the second mounting hole 21 (during assembly, the step surface 34 contacts the end surface of the second mounting hole 21 to determine the distance from the marking ball 41 to the axis center of the tube body 1), and this end of the connecting shaft 3 is installed in the second mounting hole 21 and fixed by a pin 35 (the number 36 in the figure is the mounting hole for the pin 35 on the connecting shaft 3), so that the connecting shaft 3 and the handle 2 can be firmly connected and the rotation of the connecting shaft 3 and the reference frame 4 can be limited.
[0036] like Figure 3 and Figure 5-6 As shown, in order to facilitate the connection between the handle 2 and the tube body 1, an insertion hole 22 can be provided in the middle of the bottom surface of the handle 2, and the upper end of the tube body 1 is inserted into the insertion hole 22. Limiting lugs 11 for abutting against the bottom surface of the handle 2 are provided on both sides of the upper end of the tube body 1 (specifically, there can be two, respectively located on both sides of the tube body 1), and a receiving groove 23 for accommodating the limiting lug 11 is also provided in the middle of the bottom surface of the handle 2 (when assembled, the upper surface of the limiting lug 11 contacts the bottom surface of the receiving groove 23). Such a configuration can improve the connection firmness between the handle 2 and the tube body 1 and limit the rotation of the tube body 1.
[0037] A second nail hole 12 may be provided on the limiting lug 11, and a third nail hole 24 may be provided on the bottom surface of the handle 2 at a position corresponding to the second nail hole 12. Fixing nails (such as screws) may be inserted into the second nail hole 12 and the third nail hole 24 to further improve the connection firmness.
[0038] The portion of the tube body 1 above the limiting lug 11 may be provided with a first plane 13 (specifically, there may be two planes, respectively located on both sides of the tube body 1), and a second plane 25 matching the first plane 13 is provided in the plug-in hole 22. During assembly, the first plane 13 on the tube body 1 contacts the second plane 25 in the plug-in hole 22 to limit the insertion direction of the tube body 1 and prevent the tube body 1 from rotating.
[0039] A slot 26 may be provided in the middle of the upper part of the handle 2, and the upper end of the tube body 1 passes through the insertion hole 22 and extends into the slot 26. The portion of the tube body 1 located in the slot 26 is provided with an external thread 14. In specific implementation, the needle core may include a needle body (not shown) and an end cap 5 located at the upper end of the needle body, and the end cap 5 may be threadedly connected to the external thread 14 at the upper end of the tube body 1 to facilitate temporary fixing of the needle core.
[0040] The inventors found during the research that the needle head of the existing puncture needle is a symmetrical triangular cone, which is easy to penetrate the inner wall of the pedicle and damage important tissues such as nerves in the spinal canal. The operator feels poor during puncture. Figure 7As shown, the lower end of the tube body 1 can be provided with an inclined surface 15 to form an eccentric puncture end 16 that deviates from the axis of the tube body 1. In this way, during the puncture process, when the outer peripheral surface of the lower end of the tube body 1 contacts the harder cortical bone on the inner side of the pedicle, the insertion direction of the puncture needle can be changed without penetrating the inner cortical bone, reducing damage to tissues such as nerves, thereby improving the safety of the puncture process; at the same time, the inclined surface 15 has a guiding effect, thereby improving the operator's feel during the puncture process, which is beneficial to the puncture operation.
[0041] In addition, the lower part of the tube body 1 may be provided with a threaded section (specifically, it may be above the eccentric puncture end 16, not shown) so that the tube body 1 can be self-positioned and threadedly locked on the pedicle, so as to maintain a stable and accurate intraoperative channel, reduce the risk of repeated positioning and puncture caused by the needle core being removed and the tube body 1 being pulled out during the operation, and shorten the operation time. The tube body 1 may also be provided with a scale 17 to facilitate understanding of the puncture depth of the tube body 1 during the operation.
[0042] On the other hand, the utility model provides a pedicle puncture trocar, comprising a sleeve and a needle core located in the sleeve, wherein the sleeve is the above-mentioned pedicle puncture sleeve. Since the structure of the pedicle puncture sleeve is the same as above, it will not be described here.
[0043] The pedicle puncture trocar of the utility model, on the one hand, adds a reference frame to the traditional pedicle puncture cannula / trocar. When the doctor uses it, the position of the marker ball on the reference frame in space is used to track the tip of the pedicle puncture trocar under the navigation system. The relative position relationship of the pedicle puncture trocar with respect to the patient's spine can be displayed in real time during the operation, so that the doctor can accurately find the screw placement position and assist in determining the screw placement depth under minimally invasive conditions; on the other hand, a handle matching the tube body is designed, and the tube body can be detachably connected to the handle, so the tube body can be easily disassembled and replaced to solve the problem that the tube body is easy to break in actual use. The utility model performs navigation positioning by using the marker ball on the reference frame, which can reduce the number of X-ray fluoroscopy during the operation and easily determine the insertion position and depth.
[0044] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A pedicle puncture cannula, comprising a hollow tube body, wherein a handle is provided at the upper end of the tube body, characterized in that: A connecting shaft is provided on the side of the handle, a reference frame is provided at the end of the connecting shaft, at least three marking balls are provided on the reference frame, and the tube body is detachably connected to the handle; A first mounting hole for mounting a connecting shaft is provided in the middle of the reference frame, a limiting boss for abutting against the back of the reference frame is provided at one end of the connecting shaft close to the reference frame, and a first nail hole is provided on the end surface of the end, a fixing nail is provided in the first nail hole, and the nail cap of the fixing nail is used to abut against the front of the reference frame to fix the reference frame and the connecting shaft together.
2. The pedicle puncture cannula according to claim 1, characterized in that: A first key slot is provided on the side wall of the first mounting hole, a second key slot is provided on one end of the connecting shaft close to the reference frame, and key pins are inserted into the first key slot and the second key slot.
3. The pedicle puncture cannula according to claim 1, characterized in that: A second mounting hole is provided on the side of the handle, and a step surface for abutting against the end surface of the second mounting hole is provided at one end of the connecting shaft away from the reference frame. This end of the connecting shaft is located in the second mounting hole and fixed by a pin.
4. The pedicle puncture cannula according to any one of claims 1 to 3, characterized in that: A plug-in hole is provided in the middle of the bottom surface of the handle, the upper end of the tube body is inserted into the plug-in hole, limiting lugs are provided on both sides of the upper end of the tube body for abutting against the bottom surface of the handle, and a receiving groove is also provided in the middle of the bottom surface of the handle for accommodating the limiting lugs.
5. The pedicle puncture cannula according to claim 4, characterized in that: A second nail hole is provided on the limiting lug, a third nail hole is provided on the bottom surface of the handle at a position corresponding to the second nail hole, and fixing nails are inserted into the second nail hole and the third nail hole; And / or, a first plane is provided on a portion of the tube body above the limiting lug, and a second plane matching the first plane is provided in the plug hole.
6. The pedicle puncture cannula according to claim 4, characterized in that: A slot is provided in the middle of the upper part of the handle, the upper end of the tube body passes through the plug hole and extends into the slot, and the portion of the tube body located in the slot is provided with an external thread.
7. The pedicle puncture cannula according to claim 4, characterized in that: The lower end of the tube body is provided with an inclined surface so as to form an eccentric puncture end deviating from the axis of the tube body; And / or, a threaded section is provided at the lower portion of the tube body.
8. The pedicle puncture cannula according to claim 4, characterized in that: The reference frame is parallel to the tube body; And / or, the tube body is provided with scales.
9. A pedicle puncture trocar, comprising a cannula and a needle core located in the cannula, characterized in that: The sleeve is a pedicle puncture sleeve as described in any one of claims 1-8.