Percutaneous puncture lumbar pedicle screw puncture guide device
By designing a detachable cylindrical rod guide, the problems of vascular and nerve damage and bone destruction caused by blind puncture in existing technologies have been solved, enabling precise and safe placement of lumbar pedicle screws, reducing radiation exposure and operation time.
Patent Information
- Application Number
- CN202422756330.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-11-13
AI Technical Summary
Current percutaneous pedicle screw placement techniques have drawbacks, including blind puncture leading to vascular and nerve damage, bone destruction, increased radiation exposure, and prolonged operation time.
A guide device with a detachable cylindrical rod structure is designed. By utilizing the narrowed structure of the front section of the cylinder and the hollow sleeve, the pedicle screw insertion point of the superior articular process can be accurately located, reducing the number of punctures and ensuring safety and accuracy.
It achieves precise one-time puncture of the pedicle screw insertion point of the superior articular process, avoiding damage to blood vessels and nerves, reducing radiation exposure and surgical trauma, and shortening operation time.
Smart Images
Figure CN223653910U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of percutaneous puncture lumbar pedicle screw puncture guide. BACKGROUND
[0002] The existing percutaneous puncture technology of pedicle is that after a point on vertebral body bone is blindly punctured by conventional percutaneous puncture needle, the position of puncture is judged by perspective, then repeatedly adjusted until the position of puncture is confirmed to be located in the pedicle screw needle entry point of upper articular process by perspective. Then further puncture into vertebral body, the inner core of puncture needle is withdrawn, guide wire is placed after being placed, and then the outer shell of puncture needle is withdrawn, and then hollow pedicle screw is placed through guide wire.
[0003] But in the puncture process, because it is blind puncture, it cannot be accurately punctured to the pedicle screw needle entry point of upper articular process at one time, and needs to be repeatedly punctured. Because the front end of percutaneous puncture needle is sharp tip, there is the possibility of damaging blood vessels and nerves in the process of blind puncture, which can cause serious consequences. In addition, because of repeated puncture, the bone of target needle entry point can be damaged, so that the pedicle screw cannot be effectively placed, which can not achieve the effect of firm fixation. Finally, repeated puncture needs to be performed by perspective each time, which increases the radiation intake of patients, increases the operation and anesthesia time and trauma of patients, and also increases the probability of incision infection of patients. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a kind of percutaneous puncture lumbar pedicle screw puncture guide, which helps to accurately find the pedicle screw needle entry point of upper articular process, effectively overcomes repeated blind puncture, so that the placement of percutaneous pedicle screw is more accurate and safe.
[0005] The technical scheme of the utility model is that a kind of percutaneous puncture lumbar pedicle screw puncture guide, including cylindrical long rod, the cylindrical long rod is composed of detachably connected cylindrical front section and cylindrical rear section, the length of the cylindrical front section is greater than the length of the cylindrical rear section, the front end of cylindrical front section is narrow structure, and hollow sleeve with length less than the length of cylindrical front end is fixed on the rear part side wall of cylindrical front section.
[0006] Further, the rear end of the cylindrical front end is provided with a threaded blind hole, and the front end of the cylindrical rear end is provided with a threaded convex column screw-connected with the threaded blind hole.
[0007] Further, the diameter of the cylindrical front section and the cylindrical rear section is 4-6mm, the length of the cylindrical front section is 110~130mm, and the length of the cylindrical rear section is 40~60mm.
[0008] Further, the length of the narrowing structure is 4-6mm, and the outer diameter of the front end of the narrowing structure is 3mm.
[0009] Further, the rear end surface of the cylindrical rear section is a planar circle.
[0010] Further, the length of the hollow sleeve is 35-45mm, the outer diameter of the hollow sleeve is 6-8mm, and the inner diameter of the hollow sleeve is 4.4mm.
[0011] Compared with the prior art, the utility model has the following advantages:
[0012] 1. The guide is suitable for percutaneous puncture of the pedicle screw and percutaneous puncture of the vertebroplasty for lumbar fracture, lumbar degeneration and lumbar infection, and can help to accurately find the pedicle screw needle point of the upper articular process at one time, effectively overcome repeated blind puncture, avoid blood vessel and nerve damage caused by repeated puncture, and make the percutaneous pedicle screw more accurate and safe.
[0013] 2. The guide can also avoid the damage of the bone quality of the needle point part caused by repeated puncture, and effectively place the pedicle screw.
[0014] 3. The guide can reduce the intake of patient's rays, reduce the operation and anesthesia time, and reduce the probability of surgical trauma and incision infection. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model;
[0016] Figure 2 It is an enlarged view of the A area of the utility model; Figure 1
[0017] In the figure: 10-cylindrical long rod, 11-cylindrical front section, 12-cylindrical rear section, 13-threaded blind hole, 14-threaded convex column, 15-narrowing structure, 20-hollow sleeve. DETAILED DESCRIPTION
[0018] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following examples are given, and the detailed description is as follows in combination with the drawings, but the utility model is not limited to this.
[0019] Reference Figure 1 and Figure 2
[0020] A percutaneous puncture of the lumbar pedicle screw puncture guide, comprising a cylindrical long rod 10, the cylindrical long rod is composed of a cylindrical front section 11 and a cylindrical rear section 12 which are detachably connected, the length of the cylindrical front section is greater than that of the cylindrical rear section, the front end of the cylindrical front section is a tapered structure 15 to form a frustum, which helps the process to be safe; the rear end of the cylindrical rear section is a flat circular surface; the rear side wall of the cylindrical front section is fixed with a hollow sleeve 20 with a length less than that of the cylindrical front end.
[0021] In this embodiment, the rear end surface of the hollow sleeve can be flush with the rear end of the cylindrical front end.
[0022] In this embodiment, the rear end of the cylindrical front end is provided with a threaded blind hole 13, and the front end of the cylindrical rear end is provided with a threaded convex column 14 which is screwed with the threaded blind hole, so as to connect the cylindrical front section and the cylindrical rear section to form the cylindrical long rod, and facilitate the disassembly of the cylindrical front section and the cylindrical rear section.
[0023] In this embodiment, the diameter of the cylindrical front section and the cylindrical rear section is 4-6mm, the length of the cylindrical front section is 110~130mm, and the length of the cylindrical rear section is 40~60mm. Specifically, the outer diameter of the cylindrical front section and the cylindrical rear section can be 5mm, the length of the cylindrical front section is 120mm, and the length of the cylindrical rear section is 50mm.
[0024] In this embodiment, the length of the tapered structure is 4~6mm, and specifically the length of the tapered structure can be 5mm; the outer diameter of the front end of the tapered structure is 3mm.
[0025] In this embodiment, the length of the hollow sleeve is 35~45mm, the outer diameter of the hollow sleeve is 6-8mm, and the inner diameter of the hollow sleeve is 4.4mm. Specifically, the length of the hollow sleeve is 40mm, and the outer diameter of the hollow sleeve is 7mm.
[0026] In the process of percutaneous puncture of the pedicle screw, first, the front end of the cylindrical long rod is used to explore the intersection of the outer edge of the superior articular process and the upper edge of the transverse process and is tightly attached; because the front end of the cylindrical long rod is frustum-shaped, the process is safe. Then the guide is rotated so that the hollow sleeve is directed at an angle of 45° inward and downward (the percutaneous puncture needle on the market is divided into long and short, if the percutaneous puncture needle is short, the cylindrical rear section is loosened and withdrawn), the percutaneous puncture needle is placed through the hollow sleeve and attached to the superior articular process. At this time, the center of the hollow sleeve is at the projection point of the superior articular process, and the distance between the superior articular process and the upper edge of the transverse process is 2.45mm, which is exactly the pedicle screw needle insertion point of the superior articular process. Finally, the puncture needle is punctured into the vertebral body through the pedicle of the lumbar vertebral body in the conventional standard direction, the inner core of the puncture needle is withdrawn, the guide wire is placed, and then the puncture needle shell and the cylindrical sleeve rod complex are withdrawn, and then the hollow pedicle screw is accurately placed through the guide wire.
[0027] The utility model discloses or relates to the part or structural member of mutual fixed connection, then, except another declaration, fixed connection can be understood as: the fixed connection of detachable (for example uses bolt or screw connection), also can be understood as: the fixed connection of undetachable (for example riveting, welding), of course, mutual fixed connection can be replaced by integral structure (for example using casting process integral forming manufacture) (obviously can not adopt integral forming process except).
[0028] In addition, the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the utility model above include the states or shapes similar, analogous or close to them, unless otherwise stated.
[0029] Any component provided by the utility model can be assembled from multiple individual components or manufactured as an individual component by integral forming process.
[0030] The above is only the preferred embodiment of the utility model, and any change and modification made within the scope of the utility model patent application should be included in the scope of the utility model.
Claims
1. A percutaneous lumbar pedicle screw puncture guide, comprising a cylindrical rod, characterized in that, The cylindrical rod consists of a detachably connected front cylindrical section and a rear cylindrical section. The length of the front cylindrical section is greater than the length of the rear cylindrical section. The front end of the front cylindrical section has a narrowed structure, and a hollow sleeve with a length shorter than the front end of the cylinder is fixed to the rear side wall of the front cylindrical section.
2. The percutaneous lumbar pedicle screw puncture guide according to claim 1, characterized in that, The cylinder has a threaded blind hole at the rear end of its front end and a threaded protrusion at the front end of its rear end that is threaded into the threaded blind hole.
3. A percutaneous lumbar pedicle screw puncture guide according to claim 1 or 2, characterized in that, The diameter of the front and rear sections of the cylinder is 4-6 mm, the length of the front section is 110-130 mm, and the length of the rear section is 40-60 mm.
4. The percutaneous lumbar pedicle screw puncture guide according to claim 3, characterized in that, The length of the narrowed structure is 4-6 mm, and the outer diameter of the front end of the narrowed structure is 3 mm.
5. A percutaneous lumbar pedicle screw puncture guide according to claim 1, 2, or 4, characterized in that, The rear end face of the cylinder is a planar circle.
6. A percutaneous lumbar pedicle screw puncture guide according to claim 1, 2, or 4, characterized in that, The hollow sleeve has a length of 35-45mm, an outer diameter of 6-8mm, and an inner diameter of 4.4mm.