Angle indicator for assisting manual screw placement
By designing an angle indicator that assists with freehand nailing, using limiting slots and angle display structures, the problem of inaccurate angle control during pedicle screw implantation is solved, and more precise implantation is achieved, reducing the risk of nerve and blood vessel damage.
Patent Information
- Application Number
- CN202421854147.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-01
AI Technical Summary
In the prior art, during the implantation of pedicle screws, it is difficult to accurately control the angle by placing nails with bare hands, which can easily lead to nerve root irritation, damage or other serious consequences.
An angle indicator assisted with freehand nails is designed, including a limiting slot and an angle display structure on the vertical end surface, and accurate angle display is achieved through balls and arcuate grooves.
Through the use of angle indicators, the inclination angle of the pedicle screw implantation device can be accurately displayed, reducing errors, and avoiding serious consequences such as nerve damage, vascular damage and pedicle cleavage.
Smart Images
Figure CN223009240U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pedicle screw implantation, and particularly relates to an angle indicator for assisting manual screw placement. Background Art
[0002] The pedicle screw implantation technique is a basic technique in spinal surgery, and many spinal surgeries (such as fracture fixation, decompression fusion, and spinal orthopedics) require the implantation of pedicle screws. For spinal surgeons, the most common implantation method is manual screw placement. That is, according to the selected entry point, a tool is used to screw in the screw while maintaining a certain abduction angle and cephalocaudal tilt angle. Specifically, during the operation, the patient is in the prone position after general anesthesia. The spinal surgeon selects the entry point through the anatomical landmarks on the bone surface (the method of the lambdoid ridge), first uses an opening awl to break through the cortical bone, a starting awl to penetrate into the cancellous bone, inserts a positioning needle, and uses fluoroscopy to confirm the position of the positioning needle relative to the pedicle. After the position is satisfactory, further tapping can be performed according to the existing entry point and direction. After measuring the depth of the screw track, a screw driver is used to screw in the pedicle screw. If the position is not satisfactory, the entry point can be reselected and the penetration direction can be readjusted. The safety position of the pedicle screw is a point that spinal surgeons are very concerned about. If the screwing angle is deviated and the inner wall or lower wall of the pedicle is broken, it is easy to stimulate the nerve root. Once the nerve root is stimulated, symptoms such as leg pain will occur. Once the nerve root or cauda equina nerve is damaged, serious consequences such as lower limb paralysis and urinary and fecal incontinence will be caused.
[0003] In summary, during the current manual screw placement process, the pedicle screw implantation instruments required include an opening awl, a starting awl, a positioning needle, a tap, and a screw driver. The operation of these pedicle screw implantation instruments mainly relies on the operator's hand feeling and visual estimation to maintain the corresponding angles and directions, which cannot be accurately quantified and has certain drawbacks, so it is necessary to improve. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an angle indicator for assisting manual screw placement to solve the above problems existing in the prior art.
[0005] To achieve the above purpose, the utility model adopts the following technical solutions:
[0006] An angle indicator for assisting manual nail placement, comprising an angle indicator body. A limiting groove is provided on the angle indicator body and is adapted to cooperate with the working area of the pedicle screw implanting instrument, so as to achieve relative positioning between the pedicle screw implanting instrument and the angle indicator body by fitting the working area of the pedicle screw implanting instrument to the limiting groove. The angle indicator body is further provided with a first vertical end face and a second vertical end face that are both perpendicular to the horizontal plane, and the first vertical end face and the second vertical end face are perpendicular to each other. A first angle display structure for displaying the head-tail inclination angle of the pedicle screw implanting instrument is provided on the first vertical end face, and a second angle display structure for displaying the internal-external inclination angle of the pedicle screw implanting instrument is provided on the second vertical end face.
[0007] As a preferred technical solution in the present utility model, the first angle display structure includes a first arc-shaped groove opened on the first vertical end face. A first ball is provided in the first arc-shaped groove, and a transparent protective cover for preventing the first ball from falling is provided at the notch of the first arc-shaped groove. Angle indication lines are also marked on the first vertical end face along the extending direction of the first arc-shaped groove.
[0008] As a preferred technical solution in the present utility model, the second angle display structure includes a second arc-shaped groove opened on the second vertical end face. A second ball is provided in the second arc-shaped groove, and a transparent protective cover for preventing the second ball from falling is provided at the notch of the second arc-shaped groove. Angle indication lines are also marked on the second vertical end face along the extending direction of the second arc-shaped groove.
[0009] As a preferred technical solution in the present utility model, the limiting groove is an arc-shaped groove.
[0010] Beneficial effects: In the present utility model, a limiting groove adapted to cooperate with the working area of the pedicle screw implanting instrument is provided on the angle indicator body, so as to achieve relative positioning between the pedicle screw implanting instrument and the angle indicator body by fitting the working area of the pedicle screw implanting instrument to the limiting groove. In this way, the actual inclination angle of the pedicle screw implanting instrument can be accurately displayed through the angle indicator body. The angle indicator body is further provided with a first vertical end face and a second vertical end face that are both perpendicular to the horizontal plane. In practice, when the pedicle screw implanting instrument is inclined, the first angle display structure on the first vertical end face can accurately display the head-tail inclination angle, and the second angle display structure on the second vertical end face can accurately display the internal-external inclination angle, so as to accurately implant the pedicle screw and avoid serious consequences such as nerve injury, blood vessel injury, and pedicle splitting caused by excessive errors. Description of the Drawings
[0011] Figure 1 It is a top view of the present utility model;
[0012] Figure 2 Schematic diagram of the first vertical end face in the present utility model;
[0013] Figure 3 Schematic diagram of the second vertical end face in the present utility model.
[0014] In the figure: 1 - Angle indicator body; 101 - Limit groove; 102 - First arc-shaped groove; 103 - First ball; 104 - Second arc-shaped groove; 105 - Second ball. Specific implementation mode
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the present utility model in combination with the descriptions of the accompanying drawings and the embodiments or the prior art. Obviously, the following descriptions of the structures of the accompanying drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present utility model, but do not constitute a limitation to the present utility model.
[0016] Embodiment:
[0017] As Figures 1-3 shown, this embodiment provides an angle indicator for assisting in manual screw placement, including an angle indicator body 1. A limit groove 101 matching the working area of the pedicle screw implanting instrument is provided on the angle indicator body 1, so as to realize the relative positioning of the pedicle screw implanting instrument and the angle indicator body 1 by fitting the working area of the pedicle screw implanting instrument to the limit groove 101. In this way, the actual inclination angle of the pedicle screw implanting instrument can be accurately displayed through the angle indicator body 1; a first vertical end face and a second vertical end face both perpendicular to the horizontal plane are further provided on the angle indicator body 1, and the first vertical end face and the second vertical end face are perpendicular to each other. A first angle display structure for displaying the head-tail inclination angle of the pedicle screw implanting instrument is provided on the first vertical end face, and a second angle display structure for displaying the internal-external inclination angle of the pedicle screw implanting instrument is provided on the second vertical end face. In practice, when the pedicle screw implanting instrument is inclined, its specific inclination situation can be displayed through the first angle display structure and the second angle display structure, and then the internal-external inclination angle and the head-tail inclination angle can be accurately judged, so as to accurately implant the pedicle screw and avoid serious consequences such as nerve injury, blood vessel injury, and pedicle split when the error is too large.
[0018] In the present utility model, a limiting groove 101 is provided on the angle indicator body 1 and is matched with the working area of the pedicle screw implanting instrument, so as to realize the relative positioning of the pedicle screw implanting instrument and the angle indicator body 1 by fitting the working area of the pedicle screw implanting instrument to the limiting groove 101. In this way, the actual inclination angle of the pedicle screw implanting instrument can be accurately displayed by the angle indicator body 1. The angle indicator body 1 is also provided with a first vertical end face and a second vertical end face that are both perpendicular to the horizontal plane. In practice, when the pedicle screw implanting instrument is inclined, the first angle display structure on the first vertical end face can accurately display the head-tail inclination angle, and the second angle display structure on the second vertical end face can accurately display the internal-external inclination angle, so as to accurately implant the pedicle screw and avoid serious consequences such as nerve injury, blood vessel injury, and pedicle split caused by excessive errors.
[0019] As a preferred implementation in this embodiment, it should be further noted that the first angle display structure includes a first arc-shaped groove 102 opened on the first vertical end face. A first ball 103 is arranged in the first arc-shaped groove 102, and a transparent protective cover is arranged at the notch of the first arc-shaped groove 102 to prevent the first ball 103 from falling, ensuring the stable rolling of the first ball 103 in the first arc-shaped groove 102. An angle indication line is also marked on the first vertical end face along the extending direction of the first arc-shaped groove 102. In practice, when the angle indicator body 1 inclines in the head-tail direction along with the pedicle screw implanting instrument, the first ball 103 will roll in the first arc-shaped groove 102, and then the head-tail inclination angle can be accurately read through the angle indication line.
[0020] It should be noted that the radian of the first arc-shaped groove 102 can be set according to the actual situation. In practice, it can also be a 360° circular groove directly, and this embodiment does not make specific restrictions.
[0021] As a preferred implementation in this embodiment, it should be further noted that the second angle display structure includes a second arc-shaped groove 104 opened on the second vertical end face. A second ball 105 is arranged in the second arc-shaped groove 104, and a transparent protective cover is arranged at the notch of the second arc-shaped groove 104 to prevent the second ball 105 from falling, ensuring the stable rolling of the second ball 105 in the first arc-shaped groove 102. An angle indication line is also marked on the second vertical end face along the extending direction of the second arc-shaped groove 104. In practice, when the angle indicator body 1 inclines in the internal-external direction along with the pedicle screw implanting instrument, the second ball 105 will roll in the second arc-shaped groove 104, and then the internal-external inclination angle can be accurately read through the angle indication line.
[0022] It should be noted that the arc of the second arc-shaped groove 104 can be set according to the actual situation. In practice, it can also be a 360° circular groove directly, and this embodiment does not make specific restrictions.
[0023] As a preferred implementation in this embodiment, it should be further noted that the limiting groove 101 is an arc-shaped groove, which fits better with the working areas of the opening cone, the opening cone, the positioning needle, the tapping, and the nail inserter, thereby making the readings of the head and tail tilt angles and the inner and outer tilt angles more accurate.
[0024] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. An angle indicator for assisting freehand nail placement, characterized in that: The invention comprises an angle indicator body (1), on which a limiting groove (101) is provided which matches the working area of the pedicle screw implantation instrument, so as to realize the relative positioning of the pedicle screw implantation instrument and the angle indicator body (1) by fitting the working area of the pedicle screw implantation instrument to the limiting groove (101); the angle indicator body (1) is also provided with a first vertical end face and a second vertical end face which are both perpendicular to the horizontal plane, and the first vertical end face and the second vertical end face are perpendicular to each other, the first vertical end face is provided with a first angle display structure for displaying the head-tail inclination angle of the pedicle screw implantation instrument, and the second vertical end face is provided with a second angle display structure for displaying the inner and outer inclination angles of the pedicle screw implantation instrument.
2. An angle indicator for assisting freehand nail placement according to claim 1, characterized in that: The first angle display structure comprises a first arcuate groove (102) opened on a first vertical end face, a first ball (103) is arranged in the first arcuate groove (102), and a transparent protective cover is arranged at the notch of the first arcuate groove (102) to prevent the first ball (103) from falling; and an angle indicator line marked along the extension direction of the first arcuate groove (102) is also arranged on the first vertical end face.
3. An angle indicator for assisting freehand nail placement according to claim 1 or 2, characterized in that: The second angle display structure comprises a second arc-shaped groove (104) opened on the second vertical end face, a second ball (105) is arranged in the second arc-shaped groove (104), and a transparent protective cover is arranged at the notch of the second arc-shaped groove (104) to prevent the second ball (105) from falling; and an angle indication line marked along the extension direction of the second arc-shaped groove (104) is also arranged on the second vertical end face.
4. The angle indicator for assisting freehand nail placement according to claim 1, characterized in that: The limiting groove (101) is an arc-shaped groove.