CN214761635U - Hip joint replacement acetabulum position change measuring device - Google Patents
Hip joint replacement acetabulum position change measuring device Download PDFInfo
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- CN214761635U CN214761635U CN202120548954.1U CN202120548954U CN214761635U CN 214761635 U CN214761635 U CN 214761635U CN 202120548954 U CN202120548954 U CN 202120548954U CN 214761635 U CN214761635 U CN 214761635U
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Abstract
The utility model provides a hip joint replacement acetabular position changes measuring device, include: a scale having scale markings; the positioning piece is used for positioning the scale at a set position; the measuring part is integrally movably arranged on the scale and is provided with an extending end which is suitable for extending into the acetabulum to abut against the top of the acetabulum and an indicating end for indicating the scale marks. The utility model discloses a hip joint replacement acetabular bone position changes measuring device, the change volume of postoperative acetabular bone position before can the accurate measurement provides data for doctor's follow-up compensation operation to postoperative basic unanimity before the lower limbs length and the eccentricity that make the patient as far as possible accomplish.
Description
Technical Field
The utility model relates to a medical instrument technical field for the joint replacement, concretely relates to around hip joint replacement, carry out measuring device to the variable quantity of acetabular bone position.
Background
Hip arthroplasty is currently the most effective method for clinically treating severe arthropathy, femoral neck fracture in the elderly and fracture between partial femoral tuberosities. With the aging of population and the increasing of bone joint diseases, hip joint replacement can reconstruct the function of the diseased joint, can obviously improve the working capacity and the life quality of patients, and is widely applied at home and abroad as a mature treatment means.
Referring to fig. 5-7, in hip replacement surgery, the placement of the acetabular cup has a significant effect on the performance of the surgery. First, the placement of the acetabular cup affects the lower limb length. If the acetabulum moves upwards after operation, the lower limbs can be shortened; if the acetabulum moves down after surgery, the lower limb can become longer. Clinically, the lower limbs are required to be as long as possible after the operation before and after the operation, and the change of the length of the lower limbs can not only cause obvious discomfort of patients, but also cause legal problems abroad. Secondly, the placement of the acetabular cup can also affect the acetabular offset. Acetabular offset is the vertical distance between the femoral central axis and the anterior central axis of the spine. The eccentricity of the acetabulum is reduced, and after hip joint replacement, the joint is unstable, which easily causes dislocation of the hip joint; the patient may experience significant discomfort due to the excessive eccentricity.
At present, in clinical practice, the judgment method for the equal length of the lower limbs is to compare the position changes of the patella on two sides, and the judgment is greatly influenced by the body position change and is not accurate enough. The judgment of the acetabulum eccentricity mainly depends on the experience of doctors.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming not having the instrument that is used for assisting the specific data of doctor's judgement acetabular position variation amount comparatively accurate among the prior art to can't provide the guidance for the subsequent operation of doctor, and then the technical defect that postoperative low limbs length changes or acetabular eccentricity changes before appearing easily, thereby provide one kind and can carry out accurate measuring device to the acetabular variation amount.
Therefore, the utility model provides a hip joint replacement acetabular position changes measuring device, include:
a scale having scale markings;
the positioning piece is used for positioning the scale at a set position;
the measuring part is integrally movably arranged on the scale and is provided with an extending end which is suitable for extending into the acetabulum to abut against the top of the acetabulum and an indicating end for indicating the scale marks.
As a preferable aspect, the measuring member includes:
the arc-shaped piece is provided with the extending end;
the indicating piece is fixedly connected with the arc-shaped piece and is provided with an indicating end;
the middle part of the scale is provided with a long through hole with uniform width; the instruction end is followed the scale back, warp rectangular through-hole wear out to with the scale is openly parallel and level or stretch out the scale is openly by a take the altitude, in order to indicate the scale mark.
Preferably, the position of the extending end for abutting against the top of the acetabulum is arranged at the same height as the position of the indicating end for indicating the scale mark.
Preferably, the width of the indicating end is substantially the same as the width of the elongated through hole.
Preferably, the measuring member further comprises a movable fixing structure for movably fixing the indicator member to the scale.
As a preferable aspect, the movable fixing structure includes:
the threaded hole is formed in the indicating piece; when the indicating end is inserted into the long strip through hole, the threaded hole is opposite to the long strip through hole;
fixing bolt follows the front of scale, warp rectangular through-hole is worn out to the scale back with the screw hole spiro union.
Preferably, the diameter of the fixing bolt in the inner part of the elongated through hole is substantially the same as the width of the elongated through hole.
As a preferable scheme, the positioning piece comprises a fixed column, and one end of the fixed column is conical and is suitable for being nailed and fixed.
As a preferred scheme, the fixed column is provided with scale marks.
Preferably, the scale mark on the fixed column is arranged on the side of the fixed column facing the measuring part.
It should be noted that: the eccentricity in the present invention is the vertical distance between two vertical lines as shown in fig. 10.
The technical scheme provided by the utility model, following advantage has:
1. the utility model discloses a hip joint replacement acetabulum position change measuring device, which comprises a scale, a positioning piece and a measuring piece; the positioning piece is used for positioning and fixing the scale on the human skeleton at one side where the acetabulum needs to be replaced; the measuring part is integrally movably arranged on the scale and is provided with an extending end and an indicating end; before acetabulum replacement, positioning the scale, integrally moving the measuring part on the scale to enable the extending end to abut against the top of the acetabulum, and reading a scale value indicated by the indicating end on the scale; when the acetabulum is replaced, the scale and the measuring part are taken down; after the acetabulum test mold is installed, positioning the scale again, integrally moving the measuring part on the scale to enable the extending end to abut against the top of the acetabulum test mold, and reading the scale value indicated by the indicating end on the scale again; the difference value of the two scale values is the variation (variation in the vertical direction) of the acetabulum positions before and after the acetabulum trial replacement, the variation can influence the length of the lower limbs, after the variation value is obtained, a doctor can be prompted to adopt the acetabulum prosthesis with the same specification as the acetabulum trial, or replace the acetabulum trial with other specifications for measurement again, and the acetabulum prosthesis with the same specification as the corresponding acetabulum trial is adopted until the variation of the acetabulum positions before and after the acetabulum trial installation is within an acceptable range value. Use the utility model discloses a hip joint replacement acetabular bone position changes measuring device can accomplish as far as possible that the low limbs length of postoperative before the patient is isometric.
2. The utility model discloses a hip joint replacement acetabulum position change measuring device, the measuring part comprises an arc part and an indicating part, the middle part of a scale is provided with a strip through hole with uniform width, and the indicating part is used for indicating the scale after penetrating out from the back of the scale through the strip through hole; the indicator is inserted from the elongated through hole and indicates the scale from the middle, and the position of the indicator is more easily fixed.
3. The utility model discloses a hip joint replacement acetabular position changes measuring device, the width of instruction end is unanimous basically with the width of rectangular through-hole, like this, instructs the end both to be used for instructing the scale interval, can play the direction again and prescribe a limit to the effect of instruction end position.
4. The utility model discloses a hip joint replacement acetabulum position change measuring device, which also comprises a movable fixing structure used for movably fixing the indicating part on the scale, and the movable fixing structure specifically comprises a threaded hole arranged on the indicating part and a fixing bolt correspondingly arranged; after the pilot end inserted rectangular through-hole, the screw hole was just right with rectangular through-hole, used fixing bolt to insert the back from the front of scale this moment and screw hole spiro union, can realize the portable fixed connection of indicator and scale.
5. The utility model discloses a hip joint replacement acetabular position changes measuring device, fixing bolt's the diameter that is located the inside part of rectangular through-hole, and is unanimous basically with the width of rectangular through-hole to fixing bolt can be used for the position of direction and assistance-localization real-time indicator together with the indicator.
6. The utility model discloses a hip joint replacement acetabulum position change measuring device, the positioning piece comprises a fixed column, one end of the fixed column is conical, and the fixed column is suitable for being nailed and fixed; furthermore, the scale marks are arranged on the fixed column, the scale is positioned before acetabular replacement, the measuring part is integrally moved on the scale, the extending end is abutted against the top of the acetabulum, and the scale value indicated on the fixed column is read at the moment; during acetabulum replacement, the scale and the measuring part are taken down, after the acetabulum trial mold is installed, the scale is well positioned again, the measuring part is integrally moved on the scale, the extending end is abutted against the top of the acetabulum trial mold, and the scale value indicated on the fixed column is read again; the difference value of the two scale values is the variation (the variation in the left and right directions) of the acetabulum positions before and after the acetabulum trial replacement, the variation can influence the eccentricity of the acetabulum, after the variation value is obtained, a doctor can be prompted to adopt the acetabulum prosthesis with the same specification as the acetabulum trial, or replace the acetabulum trial with other specifications for measurement again, and the acetabulum prosthesis with the same specification as the corresponding acetabulum trial is adopted until the variation of the acetabulum positions before and after the acetabulum trial installation is within an acceptable range value. Use the utility model discloses a hip joint replacement acetabular bone position changes measuring device, the eccentricity of accomplishing the patient before the art postoperative as far as possible does not have the change or changes very little.
Drawings
In order to more clearly illustrate the technical solutions in the prior art or the embodiments of the present invention, the drawings used in the description of the prior art or the embodiments are briefly introduced below.
Fig. 1 is a schematic view of the overall structure of the hip replacement acetabulum position change measuring device of the present invention.
Fig. 2 is another perspective view of fig. 1.
Fig. 3 is another perspective view of fig. 1.
Fig. 4 is a schematic diagram of the exploded structure of fig. 1.
FIG. 5 is a schematic view of the femoral head connection at the acetabular site prior to hip replacement.
Fig. 6 is a schematic view of the hip joint of fig. 5.
Fig. 7 is a schematic view of the femoral head of fig. 5.
Fig. 8 is an application schematic diagram of the hip replacement acetabulum position change measuring device of the present invention for measuring the position of the acetabulum before operation.
Fig. 9 is an application schematic diagram of the hip replacement acetabulum position change measuring device of the present invention for measuring the position of the acetabulum after operation.
FIG. 10 is an explanatory diagram of eccentricity.
Reference numerals: 1. a scale; 10. a strip through hole; 2. a measuring member; 21. an extending end; 22. an indicating end; 23. a threaded hole; 24. fixing the bolt; 201. an arcuate member; 202. an indicator; 3. and (5) fixing the column.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings.
Examples
The present embodiment provides a hip replacement acetabulum position change measuring device, as shown in fig. 1 to 4, comprising: scale 1, positioning element and measuring element 2. Wherein, the scale 1 is provided with scale marks; the positioning piece is used for positioning the scale 1 at a set position; the measuring part 2 is integrally movably arranged on the scale 1 and is provided with an extending end 21 and an indicating end 22; wherein, stretch into end 21 and be used for stretching into the acetabulum inside in order to support against the acetabulum top, indicate end 22 and stretch into end 21 and fixedly set up on measuring part 2 together, it follows stretch into end 21 and moves together, and after stretch into end 21 supported and supported in suitable position, indicate end 22 and indicate the scale interval on scale 1.
Specifically, the measuring part 2 comprises an arc-shaped part 201 and an indicating part 202; wherein, the arc-shaped part 201 has the above-mentioned extending end 21, and the indicating part 202 has the above-mentioned indicating end 22; the reason why the extending end 21 is arranged on the arc-shaped part 201 is that the acetabulum has a certain depth and is generally open downwards, and the extending end 21 is arranged on the arc-shaped part 201, so that the extending end 21 can be extended to the highest position of the top of the acetabulum; the highest position of the acetabulum is used as a measuring point, and the position is measured before and after the acetabulum replacement, so that the position variation before and after the acetabulum replacement can be known.
The middle part of scale 1 is equipped with the even unanimous rectangular through-hole 10 of width, and the instruction end 22 is worn out to the front parallel and level with scale 1 or stretch out the positive take the altitude of scale 1 from the scale 1 back, through rectangular through-hole 10, is convenient for instruct and read the scale interval.
In the present embodiment, the position of the extending end 21 for abutting against the acetabulum top is arranged at the same height as the position of the indicating end 22 for indicating the scale mark.
Preferably, the width of the indicator end 22 substantially corresponds to the width of the elongate through-hole 10. Thus, the indicator end 22 can be used to indicate both scale values and to guide and define the position of the indicator 202.
The measuring part 2 further comprises a movable fixing structure for movably fixing the indicator 202 on the scale 1, and the movable fixing structure specifically comprises a threaded hole 23 formed in the indicator 202 and a correspondingly arranged fixing bolt 24; the threaded hole 23 is formed in a position which can be opposite to the long through hole 10 after the indicating end 22 is inserted into the long through hole 10; the fixing bolt 24 penetrates out from the front surface of the scale 1 through the strip through hole 10 to the back surface of the scale 1 and is in threaded connection with the threaded hole 23.
Further, the diameter of the fixing bolt 24 at the inner portion of the elongated through hole 10 is substantially the same as the width of the elongated through hole 10, so that the fixing bolt 24 and the indicator 202 can function together to guide and define the position of the measuring member 2.
In this embodiment, the positioning member for positioning the scale 1 at the set position includes the fixing column 3, and one end of the fixing column 3 is tapered and is suitable for being nailed into a human bone. The fixing column 3 is provided with a scale mark, preferably, the scale mark is arranged on the side surface of the fixing column 3 facing one side of the measuring part 2.
Referring to fig. 8-9, the method of using the hip replacement acetabular position change measuring device of the present embodiment is as follows:
before acetabulum replacement, a fixing column 3 is nailed at a proper position, a scale 1 is well positioned, a measuring part 2 is integrally moved on the scale 1, an extending end 21 is abutted against the top of the acetabulum, and at the moment, a scale value indicated by an indicating end 22 on the scale 1 and a scale value on the fixing column 3 are read;
when the acetabulum is replaced, the scale 1 and the measuring part 2 are taken down, the fixing column 3 is reserved, and the measuring column can be used as a hook for pulling and hanging muscle tissues in an operation;
after the acetabulum trial mold replacement is finished, positioning the scale 1 again, integrally moving the measuring part 2 on the scale 1 to enable the extending end 21 to abut against the top of the acetabulum, reading the scale value indicated by the indicating end 22 on the scale 1, and fixing the scale value on the column 3;
the difference value of the scale values indicated by the two indication ends 22 on the scale 1 is the variation of the acetabulum positions in the vertical direction before and after the acetabulum trial mold replacement, the variation can affect the length of lower limbs, and after the variation value is obtained, a doctor can be prompted to adopt the acetabulum prosthesis with the same specification as the acetabulum trial mold or replace the acetabulum trial molds with other specifications for measurement again, and when the variation of the acetabulum positions before and after the acetabulum trial mold installation is within an acceptable range value, the acetabulum prosthesis with the same specification as the corresponding acetabulum trial mold is adopted;
the scale values on the fixed columns 3 on the two sides are the variation of the acetabulum position in the left and right directions before and after the acetabulum trial replacement, the numerical value can influence the eccentricity, and after the variation data is obtained, a doctor can be prompted to adopt the acetabulum prosthesis with the same specification as the acetabulum trial or replace the acetabulum trial with other specifications for measurement again until the variation of the acetabulum position before and after the acetabulum trial installation is within an acceptable range value, and then adopt the acetabulum prosthesis with the same specification as the corresponding acetabulum trial.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (8)
1. A hip replacement acetabulum position change measurement device, comprising:
a scale (1) having scale markings;
the positioning piece is used for positioning the scale (1) at a set position;
the measuring piece (2) is integrally movably mounted on the scale (1) and is provided with an extending end (21) which is suitable for extending into the acetabulum to abut against the top of the acetabulum and an indicating end (22) used for indicating scale marks.
2. The hip replacement acetabular position change measurement device of claim 1, wherein:
the measuring element (2) comprises:
an arc (201) having said projecting end (21);
an indicating piece (202) fixedly connected with the arc-shaped piece (201) and provided with an indicating end (22);
the middle part of the scale (1) is provided with a long through hole (10) with uniform width; the indication end (22) is arranged on the back of the scale (1) and penetrates out of the strip-shaped through hole (10) to be flush with the front surface of the scale (1) or extend out of the front surface of the scale (1) by a certain height so as to indicate the scale mark.
3. The hip replacement acetabular position change measurement device of claim 2, wherein: the position of the extending end (21) for abutting against the top of the acetabulum is arranged to be equal in height with the position of the indicating end (22) for indicating the scale marks.
4. The hip replacement acetabular position change measurement device of claim 2, wherein: the width of the indicating end (22) is basically consistent with the width of the long strip through hole (10).
5. The hip replacement acetabular position change measurement device of any one of claims 2-4, wherein: the measuring member (2) further comprises a movable fixing structure for movably fixing the indicator member (202) on the scale (1).
6. The hip replacement acetabular position change measurement device of claim 5, wherein: the movable fixing structure includes:
a threaded hole (23) provided in the indicator (202); when the indicating end (22) is inserted into the strip through hole (10), the threaded hole (23) is opposite to the strip through hole (10);
and the fixing bolt (24) penetrates out of the front surface of the scale (1) through the strip through hole (10) to the back surface of the scale (1) and the threaded hole (23) in threaded connection.
7. The hip replacement acetabular position change measurement device of claim 6, wherein: the diameter of the fixing bolt (24) in the inner part of the strip through hole (10) is basically consistent with the width of the strip through hole (10).
8. The hip replacement acetabular position change measurement device of claim 1, wherein: the positioning piece comprises a fixing column (3), and one end of the fixing column (3) is conical and is suitable for being nailed and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120548954.1U CN214761635U (en) | 2021-03-17 | 2021-03-17 | Hip joint replacement acetabulum position change measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120548954.1U CN214761635U (en) | 2021-03-17 | 2021-03-17 | Hip joint replacement acetabulum position change measuring device |
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| CN214761635U true CN214761635U (en) | 2021-11-19 |
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| CN202120548954.1U Active CN214761635U (en) | 2021-03-17 | 2021-03-17 | Hip joint replacement acetabulum position change measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113017943A (en) * | 2021-03-17 | 2021-06-25 | 山东大学齐鲁医院(青岛) | Measuring device for acetabulum position change amount |
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- 2021-03-17 CN CN202120548954.1U patent/CN214761635U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113017943A (en) * | 2021-03-17 | 2021-06-25 | 山东大学齐鲁医院(青岛) | Measuring device for acetabulum position change amount |
| CN113017943B (en) * | 2021-03-17 | 2024-01-09 | 山东大学齐鲁医院(青岛) | Acetabular position change measuring device |
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