Pedicle screw placement angle measuring device

Abstract

The utility model discloses a pedicle screw placement angle measuring device which comprises a first compasses ruler and a second compasses ruler, the bottom of the first compasses ruler and the bottom of the second compasses ruler are both fixedly connected with lead weights through pull wires, and the bottom of one side of the first compasses ruler and the bottom of one side of the second compasses ruler are both rotationally connected with connecting rods. The two connecting rods are vertically arranged, the ends, close to each other, of the two connecting rods are fixedly connected, locking grooves are formed in the connecting rods, locking mechanisms are fixedly connected in the locking grooves, and a plurality of locking grooves corresponding to the locking mechanisms are formed in the first compass ruler and the second compass ruler in a surrounding mode; through the arrangement of the angle measuring device, a beginner can be helped to measure the placement angle of the pedicle screw, and the problem that the placement angle error is large is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a pedicle screw insertion angle measuring device. Background Art

[0002] The pedicle is a part of the vertebral arch. It starts from the posterior and lateral side of the vertebral body. It is short and thick, and protrudes backward perpendicular to the vertebral body. Its shape is arc-shaped and is fused with the vertebral body, articular process and lamina. The upper and lower notches of adjacent pedicles form the intervertebral foramen, in which the spinal nerves run. The vertebral foramina of adjacent vertebral bodies form the vertebral canal, in which the spinal nerves and spinal cord run.

[0003] The pedicle is adjacent to the spinal canal internally and the intervertebral foramen below, so special attention should be paid to this structure during spinal surgery. In clinical practice, the pedicle screw passes through this position, so accurate placement of the pedicle screw is the key to a successful operation.

[0004] However, current beginners are not proficient in the placement and proofreading of pedicle screws and lack experience, which may easily lead to large errors in the angle of placement, thus posing certain safety hazards. Utility Model Content

[0005] The utility model aims to solve the problem that beginners in the prior art are not proficient in the placement and correction of pedicle screws and lack experience, and proposes a pedicle screw placement angle measuring device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A pedicle screw insertion angle measuring device comprises a first compass ruler and a second compass ruler, wherein the bottoms of the first compass ruler and the second compass ruler are both fixedly connected to a plumb bob via a traction line, the bottoms of one side of the first compass ruler and the second compass ruler are both rotatably connected to a connecting rod, the two connecting rods are vertically arranged, the two connecting rods are fixedly connected at one end close to each other, a locking groove is provided on the connecting rod, a locking mechanism is fixedly connected in the locking groove, and a plurality of locking grooves corresponding to the locking mechanism are surrounded on the first compass ruler and the second compass ruler.

[0008] Preferably, the first compass ruler and the second compass ruler are both made of transparent plastic material.

[0009] Preferably, the two connecting rods are each provided with an arc-shaped opening at their adjacent ends.

[0010] Preferably, the locking mechanism comprises a fixing rod, and an L-shaped locking rod is slidably sleeved on the fixing rod.

[0011] Preferably, a spring is sleeved on the fixing rod, and two ends of the spring are respectively against the L-shaped locking rod and the inner wall of the locking groove.

[0012] Beneficial effects:

[0013] 1. The pedicle screw can be conveniently inserted through the arc-shaped opening, and then the inclination change of the pedicle screw can be measured with reference to the first compass ruler and the second compass ruler. The setting of the plumb bob can ensure that the measuring plane is perpendicular to the ground, and the angle can be directly read. The angle measuring device in the utility model can help beginners measure the insertion angle of the pedicle screw and avoid the problem of large insertion angle error;

[0014] 2. The setting of the connecting rod can be used to connect the first compass ruler and the second compass ruler. At the same time, the fixing rod can support and guide the L-shaped locking rod, and the spring can play an elastic supporting role for the L-shaped locking rod. The setting of the arc-shaped mouth can facilitate the connection of the pedicle screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view structural schematic diagram of a pedicle screw insertion angle measurement device proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the top view of a pedicle screw insertion angle measurement device proposed by the utility model;

[0017] Figure 3 for Figure 1 Schematic diagram of the structure at point A in .

[0018] In the figure: 1 first compass ruler, 2 second compass ruler, 3 connecting rod, 4 fixing rod, 5 L-type locking rod, 6 spring, 7 traction line, 8 lead pendant. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-3 , a pedicle screw insertion angle measuring device, comprising a first compass ruler 1 and a second compass ruler 2, the bottoms of the first compass ruler 1 and the second compass ruler 2 are fixedly connected with a plumb bob 8 through a traction line 7, to ensure that the measuring plane is perpendicular to the ground, and the angle can be directly read, when the gravity plumb is coincident with the midline of the compass ruler, it means that the measuring plane is perpendicular to the ground, the first compass ruler 1 and the second compass ruler 2 are both made of transparent plastic, which is convenient for checking the insertion angle of the pedicle screw, the bottoms of one side of the first compass ruler 1 and the second compass ruler 2 are rotatably connected with a connecting rod 3, the two connecting rods 3 are vertically arranged, and the ends close to the two connecting rods 3 are provided with arc-shaped openings, which are convenient for connecting the pedicle screws;

[0021] In this embodiment, the two connecting rods 3 are fixedly connected at their close ends, and a locking groove is provided on the connecting rod 3. A locking mechanism is fixedly connected in the locking groove to fix the angles of the first compass ruler 1 and the second compass ruler 2;

[0022] In this embodiment, a plurality of locking grooves corresponding to the locking mechanism are disposed around the first compass ruler 1 and the second compass ruler 2;

[0023] In this embodiment, the locking mechanism includes a fixing rod 4, on which an L-shaped locking rod 5 is slidably sleeved, and is used to fix the first compass ruler 1 and the second compass ruler 2. A spring 6 is sleeved on the fixing rod 4, and the two ends of the spring 6 are respectively against the L-shaped locking rod 5 and the inner wall of the locking groove, thereby providing a certain elastic support for the L-shaped locking rod 5.

[0024] In this embodiment, the pedicle screw can be easily inserted through the arc-shaped opening, and then the inclination change of the pedicle screw can be measured with reference to the first compass ruler 2 and the second compass ruler 3. The setting of the plumb bob can ensure that the measuring plane is perpendicular to the ground, and the angle can be read directly. Through the setting of the angle measuring device, beginners can be helped to measure the insertion angle of the pedicle screw to avoid the problem of large insertion angle error.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pedicle screw insertion angle measuring device, comprising a first compass ruler (1) and a second compass ruler (2), characterized in that: The bottom of the first compass ruler (1) and the second compass ruler (2) are both fixedly connected to a lead sinker (8) via a traction line (7); the bottom of one side of the first compass ruler (1) and the second compass ruler (2) are both rotatably connected to a connecting rod (3); the two connecting rods (3) are vertically arranged; the two ends of the two connecting rods (3) are fixedly connected; a locking groove is provided on the connecting rod (3); a locking mechanism is fixedly connected in the locking groove; and a plurality of locking grooves corresponding to the locking mechanism are circumferentially provided on the first compass ruler (1) and the second compass ruler (2).

2. A pedicle screw insertion angle measuring device according to claim 1, characterized in that: The first compass ruler (1) and the second compass ruler (2) are both made of transparent plastic material.

3. A pedicle screw insertion angle measuring device according to claim 1, characterized in that: The two connecting rods (3) are each provided with an arc-shaped opening at one end close to the other.

4. A pedicle screw insertion angle measuring device according to claim 1, characterized in that: The locking mechanism comprises a fixing rod (4), and an L-shaped locking rod (5) is slidably sleeved on the fixing rod (4).

5. A pedicle screw insertion angle measuring device according to claim 4, characterized in that: The fixing rod (4) is sleeved with a spring (6), and the two ends of the spring (6) are respectively against the L-shaped locking rod (5) and the inner wall of the locking groove.

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