Percutaneous vertebroplasty in-vitro puncture guide

Abstract

The application provides a percutaneous vertebroplasty in-vitro puncture guider, and relates to the technical field of medical devices.The guider comprises a vertical guide rail and a sliding block capable of sliding up and down relative to the vertical guide rail.An angle adjusting plate in a circular arc structure is arranged on the sliding block and can rotate around a center point 0 under the guidance of the sliding block, and the center point 0 is located directly below the vertical guide rail.One end of the angle adjusting plate is provided with a clamping assembly for fixing a puncture needle.When the puncture needle is fixed on the clamping assembly, the puncture end of the puncture needle points to the center point 0.The application provides a percutaneous vertebroplasty in-vitro puncture guider, and the puncture needle can be placed into the guider, the accuracy of the puncture angle can be ensured, repeated adjustment due to a poor puncture angle can be avoided, the operation time is shortened, and the operation risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a percutaneous vertebroplasty extracorporeal puncture guide. Background Technology

[0002] Percutaneous vertebroplasty (PVP) is a safe and effective minimally invasive surgery that injects bone cement into the collapsed, painful vertebral body to stabilize and repair the collapse and quickly relieve pain. It is mainly suitable for osteoporotic vertebral compression fractures and painful vertebral body damage caused by other reasons.

[0003] During the surgery, based on the results of the preoperative CT or MRI scan, the doctor inserts a puncture needle through the skin into the diseased vertebral body and injects bone cement into the vertebral body through the puncture needle, thereby stabilizing the fractured vertebral body and relieving pain.

[0004] However, due to the lack of guiding equipment, percutaneous vertebroplasty has long relied on experienced senior orthopedic surgeons to perform punctures based on their clinical experience and touch. Moreover, the puncture angle often needs to be adjusted repeatedly during the procedure, which increases the risk of bone cement leakage. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a percutaneous vertebroplasty external puncture guide. By inserting the puncture needle through this guide, the accuracy of the puncture angle can be ensured, avoiding repeated adjustments due to an incorrect puncture angle, shortening the operation time, and reducing the surgical risk.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A percutaneous vertebroplasty extracorporeal puncture guide includes a vertical guide rail and a slider that can slide up and down relative to the vertical guide rail;

[0008] The slider is equipped with an angle adjustment plate with an arc structure. Under the guidance of the slider, the angle adjustment plate can rotate around a center point, and the center point is located directly below the vertical guide rail.

[0009] One end of the angle adjustment plate is provided with a clamping assembly for fixing the puncture needle;

[0010] When the puncture needle is fixed to the clamping assembly, the puncture end of the puncture needle points to the center point.

[0011] Furthermore, the vertical guide rail is provided with a guide hole that cooperates with the slider, and the two sides of the vertical guide rail are respectively provided with a first clearance groove for avoiding the angle adjustment plate, and the slider is provided with a sliding groove that cooperates with the angle adjustment plate.

[0012] Furthermore, the slider includes a first clamping plate and a second clamping plate located on both sides of the angle adjustment plate, and the first clamping plate and / or the second clamping plate are provided with grooves for accommodating the angle adjustment plate.

[0013] Furthermore, it also includes a locking mechanism. When the locking mechanism is in the locked state, the slider is fixed relative to the vertical guide rail, and the angle adjustment plate is fixed relative to the slider.

[0014] Furthermore, the locking mechanism includes a locking bolt, the shank of which passes sequentially through the side wall of the vertical guide rail, the second clamping plate, and the angle adjustment plate before being threadedly connected to the second clamping plate.

[0015] Furthermore, a limiting structure is provided between the first clamping plate and the second clamping plate, the limiting structure including a positioning block provided on one of the clamping plates and a positioning groove provided on the other clamping plate.

[0016] Furthermore, the clamping assembly includes a first clamping plate and a second clamping plate hinged together. The first clamping plate is provided with a connecting plate, which is detachably connected to the angle adjusting plate. A locking rod is rotatably provided at one end of the first clamping plate facing away from the hinge. The second clamping plate is provided with a clearance notch for accommodating the locking rod. A locking nut is provided on the locking rod. The first clamping plate and the second clamping plate are provided with recesses for accommodating the puncture needle.

[0017] Furthermore, a retaining ring is provided on the locking rod on the side opposite to the rotating shaft of the locking nut.

[0018] Furthermore, a base is provided at the lower end of the vertical guide rail.

[0019] Furthermore, the vertical guide rail is provided with a first scale mark for indicating the height of the slider, and the angle adjustment plate is provided with a second scale mark for indicating the angle of the puncture needle.

[0020] The beneficial effects of this utility model are:

[0021] 1. The percutaneous vertebroplasty extracorporeal puncture guide provided in this application embodiment can adjust the height and angle of the puncture needle according to the set target puncture point, so that the puncture needle accurately reaches the target puncture point according to the predetermined plan, ensuring the accuracy of the puncture angle, avoiding the risk of increased bone cement leakage caused by repeated adjustments due to poor puncture angle, thereby reducing operation time and operation risk.

[0022] 2. The percutaneous vertebroplasty external puncture guide provided in this application embodiment allows even primary hospitals or young doctors to perform the surgery, lowering the surgical threshold. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a percutaneous vertebroplasty extracorporeal puncture guide provided in Embodiment 1 of this application;

[0024] Figure 2 This is a front view of a percutaneous vertebroplasty extracorporeal puncture guide provided in Embodiment 1 of this application;

[0025] Figure 3 for Figure 2 AA section view in the middle;

[0026] Figure 4 for Figure 2 BB section view in the middle;

[0027] Figure 5 A schematic diagram showing the connection relationship between the angle adjustment plate, the slider, and the clamping assembly;

[0028] Figure 6 for Figure 5 Exploded view;

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the second clamping plate;

[0030] Figure 8 This is a schematic diagram illustrating the application of a percutaneous vertebroplasty extracorporeal puncture guide provided in Embodiment 1 of this application;

[0031] Figure 9 For the opening process of the clamping component Figure 1 ;

[0032] Figure 10 For the opening process of the clamping component Figure 2 ;

[0033] Figure 11 This is a schematic diagram of the slider structure of a percutaneous vertebroplasty extracorporeal puncture guide provided in Embodiment 2 of this application.

[0034] In the diagram: 1. Vertical guide rail; 11. Guide hole; 12. First clearance groove; 13. Second clearance groove; 14. First scale mark;

[0035] 2. Slider; 21. First clamping plate; 211. Groove; 212. Positioning groove; 213. Guide positioning post; 214. Threaded hole; 22. Second clamping plate; 221. Through hole; 222. Positioning block; 223. Guide positioning hole;

[0036] 3. Angle adjustment plate; 31. Third clearance groove; 32. Second scale mark;

[0037] 4. Clamping assembly; 41. First clamping plate; 411. Connecting plate; 42. Second clamping plate; 421. Clearance notch; 43. Hinge shaft; 44. Rotating shaft; 45. Locking rod; 46. Locking nut; 47. Retaining ring;

[0038] 5. Tighten the bolts;

[0039] 6. Puncture needle;

[0040] 7. Base. Detailed Implementation

[0041] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings. The described embodiments are merely a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the protection scope of this application.

[0042] To facilitate understanding of the specific embodiments of this application, a coordinate system is now defined as follows: Figure 1 As shown, the left and right directions are horizontal, the front and back directions are vertical, and the up and down directions are vertical.

[0043] Example 1

[0044] like Figure 1 and Figure 2 As shown, a percutaneous vertebroplasty extracorporeal puncture guide includes a vertical guide rail 1, on which a slider 2 is mounted, capable of sliding up and down relative to the vertical guide rail 1. An angle adjustment plate 3 with an arc-shaped structure is mounted on the slider 2, allowing the slider 2 to slide along an arc-shaped trajectory. Under the guidance of the slider 2, the angle adjustment plate 3 can rotate around a center point O, and the center point O is located on a vertical plane of symmetry of the vertical guide rail 1 perpendicular to the angle adjustment plate 3, i.e., the center point O is located directly below the vertical guide rail 1.

[0045] A percutaneous vertebroplasty extracorporeal puncture guide also includes a locking mechanism. When the locking mechanism is in the locked state, the slider 2 is fixed relative to the vertical guide rail 1, and the angle adjustment plate 3 is fixed relative to the slider 2; when the locking mechanism is in the open state, the slider 2 can slide up and down relative to the vertical guide rail 1, and the angle adjustment plate 3 can slide along an arc trajectory relative to the slider 2.

[0046] One end of the angle adjustment plate 3 is provided with a clamping assembly 4 for fixing the puncture needle 6. When the puncture needle 6 is clamped and fixed on the clamping assembly 4, the puncture end of the puncture needle 6 points to the center point O.

[0047] As one specific implementation method, such as Figure 2 and Figure 3 As shown, in this embodiment, the vertical guide rail 1 is provided with a guide hole 11 extending vertically. The slider 2 is located within the guide hole 11 and, guided by the guide hole 11, can slide up and down equivalent to the vertical guide rail 1. The two sides of the vertical guide rail 1 (according to...) Figure 1 The coordinate system shown indicates that the left and right sides of the vertical guide rail 1 are respectively provided with first clearance grooves 12 for avoiding the angle adjustment plate 3. The two ends of the angle adjustment plate 3 extend through the first clearance grooves 12 to the outside of the vertical guide rail 1. For example, the vertical guide rail 1 is made of stainless steel tube with a square cross-section, and the inner hole of the stainless steel tube is the guide hole 11.

[0048] As one specific implementation method, such as Figure 5 As shown, in this embodiment, the slider 2 is provided with an arc-shaped groove, which cooperates with the angle adjustment plate 3 to provide guidance for the angle adjustment plate 3. The center of the circle corresponding to the groove is the center point O.

[0049] like Figure 3 , Figure 5 and Figure 6 As shown, the slider 2 includes a first clamping plate 21 and a second clamping plate 22 located on both sides of the angle adjustment plate 3, according to... Figure 1 In the coordinate system shown, the first clamping plate 21 is located behind the angle adjusting plate 3, and the second clamping plate 22 is located in front of the angle adjusting plate 3. The first clamping plate 21 is provided with an arc-shaped groove 211. When the second clamping plate 22 is in contact with the first clamping plate 21, the opening end of the groove 211 is sealed by the second clamping plate 22, forming a sliding groove that cooperates with the angle adjusting plate 3.

[0050] The locking mechanism includes a locking bolt 5. The head of the locking bolt 5 is located on the outside of the vertical guide rail 1, and the shank of the locking bolt 5 passes through the side wall of the vertical guide rail 1 in sequence (according to...). Figure 1 The coordinate system shown is the front sidewall), the second clamping plate 22 and the angle adjustment plate 3 are threadedly connected to the second clamping plate 22. The sidewall of the vertical guide rail 1 (according to Figure 1 The coordinate system shown is the front sidewall, which has a second clearance groove 13 for avoiding the rod of the locking bolt 5. The second clamping plate 22 has a through hole 221 for accommodating the rod of the locking bolt 5. The angle adjusting plate 3 has a third clearance groove 31 for avoiding the rod of the locking bolt 5, and the third clearance groove 31 is arc-shaped with the center point O as the center.

[0051] The depth of the groove 211 is less than the thickness of the angle adjusting plate 3. Preferably, the depth of the groove 211 is slightly less than the thickness of the angle adjusting plate 3. For example, the depth of the groove 211 is 0.5-1 mm less than the thickness of the angle adjusting plate 3.

[0052] When the locking bolt 5 is tightened, the first clamping plate 21 moves towards the head of the locking bolt 5 under the action of thread engagement, thereby pushing the angle adjusting plate 3 and the second clamping plate 22 together to move towards the head of the locking bolt 5, until they are pressed against the side wall of the vertical guide rail 1 (according to...). Figure 1 The coordinate system shown is on the front sidewall. Since the depth of the groove 211 is less than the thickness of the angle adjusting plate 3, the angle adjusting plate 3 is clamped and fixed between the first clamping plate 21 and the second clamping plate 22, thus achieving the connection and fixation between the slider 2 and the angle adjusting plate 3; the slider 2 and the angle adjusting plate 3 are pressed as a whole against the sidewall of the vertical guide rail 1, thus achieving the connection and fixation between the slider 2 and the vertical guide rail 1. Similarly, when the locking bolt 5 is loosened, the first clamping plate 21 and the second clamping plate 22 separate, the angle adjusting plate 3 can slide relative to the slider 2, and the second clamping plate 22 also disengages from the sidewall of the vertical guide rail 1, allowing the slider 2 and the angle adjusting plate 3 to slide up and down relative to the vertical guide rail 1 together.

[0053] Furthermore, such as Figure 6 and Figure 7 As shown, a limiting structure is provided between the first clamping plate 21 and the second clamping plate 22. The limiting structure includes a positioning block 222 disposed on one of the clamping plates and a positioning groove 212 disposed on the other clamping plate that cooperates with the positioning block 222.

[0054] In one specific implementation, the positioning block 222 described in this embodiment is disposed on the second clamping plate 22, and a positioning block 222 is respectively disposed at the upper and lower ends of the second clamping plate 22, and a positioning groove 212 that cooperates with the positioning block 222 is respectively disposed at the upper and lower ends of the first clamping plate 21.

[0055] like Figure 4 and Figure 6 As shown, the clamping assembly 4 includes a first clamping plate 41 and a second clamping plate 42. A connecting plate 411 is provided on the side of the first clamping plate 41 facing away from the second clamping plate 42, and the connecting plate 411 is detachably fixedly connected to the angle adjusting plate 3. One end of the first clamping plate 41 is hinged to one end of the second clamping plate 42 via a hinge shaft 43. A rotating shaft 44 is provided at the other end of the first clamping plate 41, and a locking rod 45 capable of rotating around the rotating shaft 44 is provided on the rotating shaft 44. A clearance notch 421 for avoiding the locking rod 45 is provided at the other end of the second clamping plate 42, and a locking nut 46 is provided on the locking rod 45. The locking nut 46 is used to press the second clamping plate 42 onto the first clamping plate 41. Both the first clamping plate 41 and the second clamping plate 42 have recesses in their middle portions for accommodating the puncture needle 6. The recessed portion has an arc-shaped structure. When the second clamping plate 42 is pressed against the first clamping plate 41 under the action of the locking nut 46, the puncture needle 6 is clamped and fixed between the two recessed portions.

[0056] Furthermore, a retaining ring 47 is provided on the locking rod 45 on the side of the locking nut 46 facing away from the rotating shaft 44. For example, the retaining ring 47 is fixedly connected to the locking rod 45 by welding. Preferably, the end face of the retaining ring 47 is flush with the end face of the locking rod 45 on the side facing away from the rotating shaft 44.

[0057] In one specific embodiment, two connecting plates 411 are provided on the side of the first clamping plate 41 facing away from the second clamping plate 42. The end of the angle adjusting plate 3 is inserted between the two connecting plates 411 and fixedly connected to the two connecting plates 411 by screws (not shown in the figure).

[0058] Furthermore, a base 7 is provided at the lower end of the vertical guide rail 1.

[0059] In one specific embodiment, the base 7 in this embodiment includes a first base plate extending longitudinally. The first base plate has a insertion hole, and the lower end of the vertical guide rail 1 is inserted into the insertion hole and fixedly connected to the first base plate by welding. A second base plate extending outwards (i.e., away from the vertical guide rail 1) perpendicular to the first base plate is located at the middle of the first base plate on the side of the vertical guide rail 1 facing away from the puncture needle 6.

[0060] Furthermore, the front side of the vertical guide rail 1 is provided with first scale markings 14 on both sides of the second clearance groove 13 to indicate the height of the slider 2. The angle adjustment plate 3 is provided with second scale markings 32 on both sides of the third clearance groove 31 to indicate the angle of the puncture needle 6.

[0061] When using, such as Figure 8 As shown, firstly, the distance A from the center O' of the patient's lesion to the skin surface of the patient's back is determined based on the preoperative CT or MRI examination results. Then, the height B of the slider 2 should be calculated based on the rotation radius of the angle adjustment plate 3, and the height of the slider 2 is adjusted according to the calculation result so that the rotation center point O of the angle adjustment plate 3 coincides with the center O' of the patient's lesion. Then, the puncture point M of the surgery is determined according to the surgical plan, the center point O and the puncture point M are connected, and the puncture angle α is calculated. Then, the angle of the angle adjustment plate 3 is adjusted according to the calculated puncture angle α so that the angle between the puncture needle 6 and the vertical guide rail 1 is equal to the puncture angle α. Then, the locking bolt 5 is tightened to lock the slider 2 and the angle adjustment plate 3. In this way, it can be ensured that the puncture needle 6 is accurately inserted from the puncture point M, and the puncture angle of the puncture needle 6 does not need to be repeatedly adjusted during the operation.

[0062] like Figure 9 and Figure 10 As shown, after the puncture is completed, first loosen the locking nut 46, then rotate the locking rod 45 to disengage it from the clearance notch 421. Then rotate the second clamping plate 42, at which point the guide can be removed entirely. During removal, the guide does not need to move along the puncture needle 6, therefore it will not affect the puncture needle 6.

[0063] Example 2

[0064] The difference between this embodiment and Embodiment 1 is that:

[0065] The first clamping plate 21 is provided with two guide positioning posts 213, and the two guide positioning posts 213 are respectively located on both sides of the threaded hole 214 that mates with the locking bolt 5, and are arranged symmetrically about the threaded hole 214. The second clamping plate 22 is provided with guide positioning holes 223 that correspond one-to-one with the guide positioning posts 213.

[0066] Guided by the two guide positioning posts 213 and the third clearance groove 31, the angle adjustment plate 3 can rotate around the center point O. With the cooperation of the guide positioning posts 213 and the guide positioning holes 223, the distance between the first clamping plate 21 and the second clamping plate 22 can be adjusted. When the locking bolt 5 is tightened, the angle adjustment plate 3 can also be clamped by the first clamping plate 21 and the second clamping plate 22, thereby achieving a fixed connection between the slider 2 and the angle adjustment plate 3.

[0067] Example 3

[0068] The difference between this embodiment and Embodiment 1 is that:

[0069] The second clamping plate 22 also has a groove 211 on the side facing the first clamping plate 21, and the two grooves 211 together form a sliding groove that cooperates with the angle adjusting plate 3. The sum of the depths of the two grooves 211 is less than the thickness of the angle adjusting plate 3.

[0070] Example 4

[0071] The difference between this embodiment and embodiment one is that the groove 211 is provided on the second clamping plate 22.

[0072] Other embodiments obtained by those skilled in the art based on the embodiments provided in this application by combining, splitting, or reorganizing the embodiments of this application do not exceed the protection scope of this application.

[0073] The above detailed embodiments have provided a detailed explanation of the purpose, technical solutions, and beneficial effects of the embodiments of this application. The above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. That is, any modifications, equivalent substitutions, improvements, etc., made on the basis of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A percutaneous vertebroplasty extracorporeal puncture guide, characterized in that: It includes a vertical guide rail (1) and a slider (2) that can slide up and down relative to the vertical guide rail (1); An angle adjustment plate (3) with an arc structure is slidably provided on the slider (2). Under the guidance of the slider (2), the angle adjustment plate (3) can rotate around a center point, and the center point is located directly below the vertical guide rail (1). One end of the angle adjustment plate (3) is provided with a clamping assembly (4) for fixing the puncture needle (6); When the puncture needle (6) is fixed on the clamping assembly (4), the puncture end of the puncture needle (6) points to the center point.

2. The percutaneous vertebroplasty extracorporeal puncture guide according to claim 1, characterized in that: The vertical guide rail (1) is provided with a guide hole (11) that cooperates with the slider (2). The vertical guide rail (1) is provided with a first clearance groove (12) on both sides for avoiding the angle adjustment plate (3). The slider (2) is provided with a sliding groove that cooperates with the angle adjustment plate (3).

3. The percutaneous vertebroplasty extracorporeal puncture guide according to claim 2, characterized in that: The slider (2) includes a first clamping plate (21) and a second clamping plate (22) located on both sides of the angle adjustment plate (3), and the first clamping plate (21) and / or the second clamping plate (22) are provided with grooves (211) for accommodating the angle adjustment plate (3).

4. The percutaneous vertebroplasty extracorporeal puncture guide according to claim 3, characterized in that: It also includes a locking mechanism. When the locking mechanism is in the locked state, the slider (2) is fixed relative to the vertical guide rail (1), and the angle adjustment plate (3) is fixed relative to the slider (2).

5. The percutaneous vertebroplasty extracorporeal puncture guide according to claim 4, characterized in that: The locking mechanism includes a locking bolt (5), the rod of which passes through the side wall of the vertical guide rail (1), the second clamping plate (22) and the angle adjustment plate (3) in sequence and is threadedly connected to the second clamping plate (22).

6. The percutaneous vertebroplasty extracorporeal puncture guide according to claim 3, characterized in that: A limiting structure is provided between the first clamping plate (21) and the second clamping plate (22), the limiting structure including a positioning block (222) provided on one of the clamping plates and a positioning groove (212) provided on the other clamping plate.

7. The percutaneous vertebroplasty extracorporeal puncture guide according to claim 1, characterized in that: The clamping assembly (4) includes a first clamping plate (41) and a second clamping plate (42) hinged together. A connecting plate (411) is provided on the first clamping plate (41). The connecting plate (411) is detachably connected to the angle adjusting plate (3). A locking rod (45) is rotatably provided on one end of the first clamping plate (41) facing away from the hinge. A clearance notch (421) for accommodating the locking rod (45) is provided on the second clamping plate (42). A locking nut (46) is provided on the locking rod (45). A recess for accommodating the puncture needle (6) is provided on the first clamping plate (41) and the second clamping plate (42).

8. The percutaneous vertebroplasty extracorporeal puncture guide according to claim 7, characterized in that: A retaining ring (47) is provided on the locking rod (45) on the side opposite to the rotating shaft (44) of the locking nut (46).

9. The percutaneous vertebroplasty extracorporeal puncture guide according to claim 1, characterized in that: The lower end of the vertical guide rail (1) is provided with a base (7).

10. The percutaneous vertebroplasty extracorporeal puncture guide according to claim 1, characterized in that: The vertical guide rail (1) is provided with a first scale mark (14) for indicating the height of the slider (2), and the angle adjustment plate (3) is provided with a second scale mark (32) for indicating the angle of the puncture needle (6).

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