A grinding acetabulum positioning and measuring device for total hip replacement

Abstract

A grinding acetabulum positioning and measuring device for total hip replacement relates to the technical field of medical devices, and comprises a grinding handle for total hip replacement, a protractor is fixed on the side of the grinding handle for total hip replacement, a sub-handle is rotatably connected to the side of the grinding handle for total hip replacement, a slider is fixed on the end of the sub-handle, and the slider is in contact and sliding connection with the side of the protractor; a measuring disk is rotatably connected to the end of the grinding handle for total hip replacement, scales are arranged at intervals on the measuring disk, and a counterweight is fixed at the zero-degree position of the measuring disk corresponding to the scale. The grinding acetabulum positioning and measuring device for total hip replacement can measure anteversion angle and abduction angle, assist treatment by measuring instruments, avoid surgical errors caused by doctors' lack of experience, thereby improving the accuracy of the surgery and ensuring the treatment effect.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a grinding acetabulum positioning and measuring device for total hip replacement. Background Art

[0002] In a normal hip joint, the angle between the femoral neck and the femoral shaft is about 125°, and the angle between the femoral neck and the line connecting the medial and lateral condyles of the distal femur is about 15°, which is the anteversion and abduction angle of the hip joint.

[0003] Total hip replacement is used for diseases of acetabulum destruction or degeneration, such as rheumatoid hip arthritis, aseptic necrosis of femoral head and old femoral neck fracture complicated with femoral head necrosis, severe deformation, collapse and secondary hip osteoarthritis, etc.

[0004] The key point of acetabulum grinding in total hip replacement surgery is the grinding and shaping of the anteversion and abduction angle of the hip joint. Too large anterior tilt angle is prone to anterior dislocation of the hip joint, while too small anterior tilt angle is prone to posterior dislocation of the hip joint. Increased abduction angle is prone to hip abduction, while too small abduction angle is prone to hip adduction. Currently, many total hip replacement surgical instruments lack hip anteversion and abduction angle measurement devices, and the acetabulum is mainly ground based on the surgeon's experience to achieve normal acetabular anteversion and abduction. A small number of surgeons lack experience, resulting in the anteversion and abduction angle deviating too much from the normal angle, causing serious complications after surgery. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a grinding acetabulum positioning and measuring device for total hip replacement, which can measure the anteversion angle and the abduction angle, assist treatment by using measuring instruments, avoid surgical errors caused by doctors' lack of experience, thereby improving the accuracy of the operation, ensuring the effect of the treatment, and effectively solving the problems in the background technology.

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

[0007] A grinding acetabulum positioning and measuring device for total hip replacement comprises a grinding handle for total hip replacement, a protractor is fixed on the side of the grinding handle for total hip replacement, a sub-handle is rotatably connected to the side of the grinding handle for total hip replacement, a slider is fixed on the end of the sub-handle, and the slider is in contact and sliding connection with the side of the protractor;

[0008] The end of the total hip replacement acetabulum grinding handle is rotatably connected to a measuring disk, scales are arranged at intervals on the measuring disk, and a counterweight is fixed at the zero-degree position of the measuring disk corresponding to the scale.

[0009] Furthermore, the end of the sub-handle is rotatably connected to the side of the acetabulum grinding handle of total hip replacement through a pin.

[0010] Furthermore, the protractor is an arc-shaped strip structure, and the center of the protractor coincides with the axis position of the pin shaft.

[0011] Furthermore, it also includes a first pointer, which is fixed on the side of the slider and points to the scale numbers on the protractor.

[0012] Furthermore, the measuring disc is rotatably connected to the end of the acetabulum grinding handle of the total hip replacement via a rotating shaft.

[0013] Furthermore, it also includes a second pointer, which is fixed to the end side of the acetabulum grinding handle of the total hip replacement, and the second pointer points to the scale on the measuring disk.

[0014] Compared with the prior art, the beneficial effects of the utility model are: the grinding acetabulum positioning and measuring device for total hip replacement has the following advantages: it can measure the anteversion angle and abduction angle, assist treatment through measuring instruments, avoid surgical errors caused by doctors' lack of experience, thereby improving the accuracy of the operation and ensuring the effect of the treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the enlarged structure of point A of the utility model;

[0017] Figure 3 It is a schematic diagram of the local structure of the measuring disk of the utility model.

[0018] In the figure: 1 total hip replacement acetabulum grinding handle, 2 protractor, 3 rotating shaft, 4 second pointer, 5 scale, 6 measuring disk, 7 dividing handle, 8 pin shaft, 9 first pointer, 10 sliding block, 11 counterweight. DETAILED DESCRIPTION

[0019] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0020] See also Figure 1-3 The present embodiment provides a technical solution: a grinding acetabulum positioning and measuring device for total hip replacement, comprising a total hip replacement acetabulum grinding handle 1, a protractor 2 is fixed to the side of the total hip replacement acetabulum grinding handle 1, a sub-handle 7 is rotatably connected to the side of the total hip replacement acetabulum grinding handle 1, a slider 10 is fixed to the end of the sub-handle 7, and the slider 10 is in contact and sliding connection with the side of the protractor 2;

[0021] The end of the total hip replacement acetabulum grinding handle 1 is rotatably connected to a measuring disk 6 , on which scales 5 are arranged at intervals, and a counterweight 11 is fixed on the measuring disk 6 at the zero degree position corresponding to the scale 5 .

[0022] The end of the dividing handle 7 is rotatably connected to the side of the total hip replacement acetabulum grinding handle 1 through a pin 8. The goniometer 2 is an arc-shaped strip structure. The center of the goniometer 2 coincides with the axis position of the pin 8. It also includes a first pointer 9, which is fixed to the side of the slider 10. The first pointer 9 points to the scale numbers on the goniometer 2. When measuring the anteversion angle, the dividing handle 7 is parallel to the patient's trunk. At this time, the dividing handle 7 rotates relatively with the total hip replacement acetabulum grinding handle 1 through the pin 8, and the slider 10 at the end of the dividing handle 7 contacts and slides with the side of the goniometer 2. Then, the first pointer 9 on the slider 10 points to the scale numbers on the goniometer 2, so as to measure the anteversion angle. It uses measuring instruments to assist treatment, avoids surgical errors caused by doctors' lack of experience, thereby improving the accuracy of the operation and ensuring the treatment effect.

[0023] The measuring disk 6 is rotatably connected to the end of the total hip replacement acetabulum grinding handle 1 through the rotating shaft 3, and also includes a second pointer 4, which is fixed on the end side of the total hip replacement acetabulum grinding handle 1. The second pointer 4 points to the scale 5 on the measuring disk 6. When measuring the abduction angle, a counterweight block 11 is fixed at the zero-degree position corresponding to the scale 5 on the measuring disk 6. Due to the effect of gravity, the zero-scale position on the measuring disk 6 always remains vertically downward, and the second pointer 4 points to the scale 5 on the measuring disk 6. The abduction angle is measured by reading the reading on the scale 5. It uses measuring instruments to assist treatment, avoids surgical errors caused by doctors' lack of experience, thereby improving the accuracy of the operation and ensuring the treatment effect.

[0024] The working principle of the grinding acetabulum positioning and measuring device for total hip replacement provided by the utility model is as follows: when measuring the anteversion angle, the sub-handle 7 is parallel to the patient's trunk. At this time, the sub-handle 7 is relatively rotated with the total hip replacement acetabulum grinding handle 1 through the pin 8, and the slider 10 at the end of the sub-handle 7 contacts and slides with the side of the protractor 2. Then, the first pointer 9 on the slider 10 points to the scale number on the protractor 2, so as to measure the anteversion angle;

[0025] When measuring the abduction angle, a counterweight 11 is fixed at the zero-degree position of the corresponding scale 5 on the measuring disk 6. Due to the effect of gravity, the zero-degree position on the measuring disk 6 always remains vertically downward, and the second pointer 4 points to the scale 5 on the measuring disk 6. The abduction angle is measured by the reading on the scale 5.

[0026] It is worth noting that the components disclosed in the above embodiments are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods. The measuring device is suitable for total hip replacement in the lateral surgical position and posterolateral approach.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances, for example, the rotational connection can be a rotational connection through a bearing.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] The parts of the present invention that are not described in detail are prior art. Although the present invention is specifically demonstrated and introduced in conjunction with the preferred implementation scheme, there are many methods and ways to implement the technical solution. The above is only a preferred implementation scheme of the present invention. However, technical personnel in the relevant field should understand that various changes can be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined in the attached claims, which are all within the scope of protection of the present invention.

Claims

1. A grinding acetabulum positioning and measuring device for total hip replacement, comprising a grinding handle for total hip replacement acetabulum (1), characterized in that: A protractor (2) is fixed to the side of the total hip replacement acetabulum grinding handle (1), a sub-handle (7) is rotatably connected to the side of the total hip replacement acetabulum grinding handle (1), a slider (10) is fixed to the end of the sub-handle (7), and the slider (10) is in contact and sliding connection with the side of the protractor (2); The end of the total hip replacement acetabulum grinding handle (1) is rotatably connected to a measuring disc (6), scales (5) are arranged at intervals on the measuring disc (6), and a counterweight (11) is fixed to the zero-degree position of the scale (5) on the measuring disc (6).

2. The grinding acetabulum positioning and measuring device for total hip replacement according to claim 1, characterized in that: The end of the sub-handle (7) is rotatably connected to the side of the acetabulum grinding handle (1) for total hip replacement via a pin shaft (8).

3. A grinding acetabulum positioning and measuring device for total hip replacement according to claim 1 or 2, characterized in that: The protractor (2) is an arc-shaped strip structure, and the center of the protractor (2) coincides with the axis of the pin shaft (8).

4. The grinding acetabulum positioning and measuring device for total hip replacement according to claim 1, characterized in that: It also comprises a first pointer (9), which is fixed on the side of the slider (10), and the first pointer (9) points to the scale number on the protractor (2).

5. The grinding acetabulum positioning and measuring device for total hip replacement according to claim 1, characterized in that: The measuring disc (6) is rotatably connected to the end of the total hip replacement acetabulum grinding handle (1) via a rotating shaft (3).

6. The grinding acetabulum positioning and measuring device for total hip replacement according to claim 1, characterized in that: It also comprises a second pointer (4), which is fixed on the end side of the acetabulum grinding handle (1) for total hip replacement, and the second pointer (4) points to the scale (5) on the measuring disk (6).

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