CN113017943B - Acetabular position change measuring device - Google Patents
Acetabular position change measuring device Download PDFInfo
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- CN113017943B CN113017943B CN202110286441.2A CN202110286441A CN113017943B CN 113017943 B CN113017943 B CN 113017943B CN 202110286441 A CN202110286441 A CN 202110286441A CN 113017943 B CN113017943 B CN 113017943B
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- scale
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- acetabulum
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- 210000000588 acetabulum Anatomy 0.000 claims abstract description 49
- 238000003780 insertion Methods 0.000 claims abstract description 5
- 230000037431 insertion Effects 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 claims description 12
- 210000003141 lower extremity Anatomy 0.000 abstract description 11
- 238000012360 testing method Methods 0.000 description 25
- 210000004394 hip joint Anatomy 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 208000012659 Joint disease Diseases 0.000 description 2
- 238000011540 hip replacement Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 208000036487 Arthropathies Diseases 0.000 description 1
- 206010020100 Hip fracture Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000011882 arthroplasty Methods 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 208000020089 femoral neck fracture Diseases 0.000 description 1
- 210000001624 hip Anatomy 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 210000004417 patella Anatomy 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4657—Measuring instruments used for implanting artificial joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
- A61B5/1072—Measuring physical dimensions, e.g. size of the entire body or parts thereof measuring distances on the body, e.g. measuring length, height or thickness
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4657—Measuring instruments used for implanting artificial joints
- A61F2002/4658—Measuring instruments used for implanting artificial joints for measuring dimensions, e.g. length
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Surgery (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Biophysics (AREA)
- Transplantation (AREA)
- Public Health (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Vascular Medicine (AREA)
- Cardiology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Dentistry (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Prostheses (AREA)
Abstract
The invention provides an acetabular position change measuring device, comprising: the scale is provided with scale marks; the positioning piece is used for positioning the scale at a set position; a measuring member, integrally movably mounted on the scale, having an insertion end adapted to extend into the interior of the acetabulum to rest against the top of the acetabulum, and an indicating end for indicating the scale markings. The device for measuring the position change of the acetabulum can accurately measure the position change of the acetabulum before and after the operation and provide data for the follow-up compensation operation of doctors, so that the length and the eccentricity of the lower limb of a patient are basically consistent before and after the operation as much as possible.
Description
Technical Field
The invention relates to the technical field of medical instruments for joint replacement, in particular to a device for measuring the variation of the position of acetabulum before and after hip joint replacement.
Background
Hip arthroplasty is currently the most effective method for clinically treating severe arthropathy, senile femoral neck fractures and partial intertrochanteric fractures. With the increasing of aging population, bone joint diseases are increasing, the hip joint replacement can reconstruct the functions of diseased joints, and can remarkably improve the working capacity and life quality of patients, and the hip joint replacement is widely applied at home and abroad as a mature treatment means.
Referring to fig. 5-7, in hip replacement surgery, acetabular cup placement has a very important impact on the performance of the surgery. First, the placement of the acetabular cup may affect the length of the lower limb. If the acetabulum moves upwards after the operation, the lower limb can become short; if the acetabulum moves downwards after operation, the lower limb becomes longer. Clinically, the lower limbs are required to be as long as possible after operation, and the change of the lower limb length can cause obvious discomfort of patients and legal problems abroad. Second, the placement of the acetabular cup may also affect the acetabular eccentricity. Acetabular eccentricity refers to the perpendicular distance between the central axis of the femur and the central axis of the spine. The eccentric distance of acetabulum is reduced, the joint is unstable after hip joint replacement operation, and dislocation of the hip joint is easy to cause; the eccentricity is too large and the patient may feel significant discomfort.
At present, the judging method for the equal length of the lower limb clinically compares the position changes of the patella at two sides, and the judgment is greatly influenced by the position changes and is not accurate enough. The judgment of the acetabular eccentricity is mainly based on the experience of doctors.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the technical defect that a tool for assisting a doctor in judging specific data of the acetabular position variation is not accurate in the prior art, so that guidance cannot be provided for subsequent operations of the doctor, and further the length of a lower limb or the eccentricity of an acetabulum is easy to change after the operation, thereby providing a device capable of accurately measuring the acetabular variation.
To this end, the present invention provides an acetabular position variation measuring apparatus including:
the scale is provided with scale marks;
the positioning piece is used for positioning the scale at a set position;
a measuring member integrally movably mounted on the scale and having an insertion end adapted to extend into the interior of the acetabulum to rest against the top of the acetabulum, and an indicating end for indicating the scale markings.
As a preferred aspect, the measuring member includes:
an arc-shaped piece with the extending end;
the indicating piece is fixedly connected with the arc-shaped piece and provided with the indicating end;
the middle part of the staff gauge is provided with a strip through hole with uniform width; the indication end penetrates out of the back of the scale through the long through hole to be flush with the front of the scale or stretches out of the front of the scale by a certain height so as to indicate the scale mark.
As a preferable scheme, the position of the extending end, which is used for abutting against the top of the acetabulum, is arranged at the same height as the position of the indicating end, which is used for indicating the scale marks.
Preferably, the width of the indication end is substantially identical to the width of the strip through hole.
Preferably, the measuring member further comprises a movable fixing structure for movably fixing the indicating member to the scale.
As a preferred aspect, the movable fixing structure includes:
the threaded hole is formed in the indicator; when the indication end is inserted into the long through hole, the threaded hole is opposite to the long through hole;
and the fixing bolt penetrates out of the front face of the scale through the long strip through hole to the back face of the scale and is in threaded connection with the threaded hole.
Preferably, the diameter of the fixing bolt at the inner part of the long strip through hole is basically consistent with the width of the long strip through hole.
As a preferred scheme, the locating piece comprises a fixing column, and one end of the fixing column is conical and is suitable for being nailed and fixed.
As a preferable scheme, the fixed column is provided with scale marks.
As a preferred embodiment, the scale marks on the fixing posts are arranged on the side of the fixing posts facing the measuring part.
It should be noted that: the eccentricity in the present invention, as shown in fig. 10, means a vertical distance between two vertical lines.
The technical scheme provided by the invention has the following advantages:
1. the invention relates to an acetabular 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 of the acetabulum to be replaced; the measuring piece is integrally movably arranged on the scale and is provided with an extending end and an indicating end; before acetabulum replacement, positioning a scale, integrally moving a measuring piece on the scale to enable the extending end to be abutted 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 staff gauge and the measuring piece are taken down; after the acetabulum test mold is installed, the scale is positioned again, the measuring piece is integrally moved on the scale, the extending end is abutted against the top of the acetabulum test mold, and the scale value indicated by the indicating end on the scale is read again; the difference between the two scale values is the variation of the acetabular position (variation in the vertical direction) before and after the acetabular test is replaced, the value can affect the length of the lower limb, and after the variation value is obtained, a doctor can be prompted whether to use the acetabular prosthesis with the same specification as the acetabular test or to replace the acetabular test with other specifications for re-measurement until the variation of the acetabular position before and after the acetabular test is installed is within an acceptable range value, and then the acetabular prosthesis with the same specification as the corresponding acetabular test is used. The acetabulum position change measuring device can be used for measuring the length of the lower limb of the patient before and after the operation as much as possible.
2. The measuring piece comprises an arc-shaped piece and an indicating piece, wherein a long through hole with uniform width is formed in the middle of the scale, and the indicating piece penetrates out from the back of the scale through the long through hole and is used for indicating scales; the indicator is inserted from the long through hole and used for indicating the scale from the middle part, and the position of the indicator is easier to fix.
3. According to the acetabular position change measuring device, the width of the indicating end is basically consistent with the width of the long through hole, so that the indicating end can be used for indicating the scale value and can also play a role in guiding and limiting the position of the indicating end.
4. The invention relates to an acetabular position change measuring device, which also comprises a movable fixing structure for movably fixing an indicator on a scale, and specifically comprises a threaded hole formed in the indicator and a fixing bolt correspondingly arranged; after the indication end is inserted into the long through hole, the threaded hole is opposite to the long through hole, and the indication part is in threaded connection with the threaded hole after being inserted from the front of the scale by using the fixing bolt, so that movable fixed connection of the indication part and the scale can be realized.
5. According to the acetabular position change measuring device, the diameter of the part of the fixing bolt, which is positioned in the long-strip through hole, is basically consistent with the width of the long-strip through hole, so that the fixing bolt can be used for guiding and assisting in positioning the position of the indicating piece together with the indicating piece.
6. According to the acetabular position variation measuring device, the positioning piece comprises the fixing column, one end of the fixing column is conical and is suitable for being nailed and fixed; further, a scale mark is arranged on the fixed column, the scale is positioned well before the acetabulum is replaced, the measuring piece 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; when the acetabulum is replaced, the scale and the measuring piece are taken down, after the acetabulum test mold is installed, the scale is positioned again, the measuring piece is integrally moved on the scale, the extending end is abutted against the top of the acetabulum test mold, and the scale value indicated on the fixed column is read again; the difference between the two scale values is the variation of the acetabular position (the variation in the left-right direction) before and after the acetabular test is replaced, the variation can affect the acetabular eccentricity, and after the variation is obtained, a doctor can be prompted whether to use the acetabular prosthesis with the same specification as the acetabular test or to replace the acetabular test with other specifications for re-measurement until the variation of the acetabular position before and after the acetabular test is installed is within an acceptable range value, and then the acetabular prosthesis with the same specification as the corresponding acetabular test is adopted. The device for measuring the position change of the acetabulum can ensure that the eccentricity of the patient before or after the operation has no change or little change as far as possible.
Drawings
In order to more clearly illustrate the technical solutions in the prior art or in the embodiments of the present invention, the following brief description is given of the drawings used in the description of the prior art or the embodiments.
Fig. 1 is a schematic view showing the overall structure of an acetabular position change amount measurement apparatus according to 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 explosive structure of fig. 1.
Fig. 5 is a schematic view of the configuration of the femoral head connection in an acetabular position prior to hip replacement.
Fig. 6 is a schematic view of the structure of the hip joint of fig. 5.
Fig. 7 is a schematic view of the femoral head of fig. 5.
Fig. 8 is a schematic view showing the application of the acetabular position variation measuring apparatus of the invention to preoperatively measurement of acetabular position.
Fig. 9 is a schematic view showing an application of the acetabular position variation measuring apparatus of the invention to post-operatively measuring acetabular positions.
Fig. 10 is a schematic illustration of eccentricity.
Reference numerals: 1. a ruler; 10. a long through hole; 2. a measuring member; 21. an insertion end; 22. an indication end; 23. a threaded hole; 24. a fixing bolt; 201. an arc-shaped member; 202. an indicator; 3. and fixing the column.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings.
Examples
The present embodiment provides an acetabular position variation measuring apparatus, as shown in fig. 1-4, including: a scale 1, a positioning member and a measuring member 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 member 2 is integrally movably mounted on the scale 1 and has an insertion 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 together fixed setting on measuring piece 2, it follows stretch into end 21 and acts together, when stretch into end 21 and support and lean on the suitable position back, indicate end 22 and instruct the scale value on scale 1.
Specifically, the measuring member 2 includes an arc member 201 and an indicator member 202; wherein the arc-shaped member 201 has the above-mentioned extending end 21, and the indicator 202 has the above-mentioned indicating end 22; the reason why the extension end 21 is disposed on the arc-shaped member 201 is that the acetabulum has a certain depth and is opened downwards, and the extension end 21 is disposed on the arc-shaped member 201 so that the extension end 21 can be inserted into the highest 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 is replaced, so that the position change quantity before and after the acetabulum is replaced can be known.
The middle part of scale 1 is equipped with rectangular through-hole 10 that the width is even unanimous, and instruction end 22 wears out to the front parallel and level with scale 1 or stretch out scale 1 front certain height from scale 1 back, through rectangular through-hole 10, is convenient for instruct and read the scale value.
In this embodiment, the position of the extending end 21 for abutting against the top of the acetabulum is set 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 is substantially the same as the width of the elongated through hole 10. The indicating end 22 thus serves both to indicate the scale value and to guide and define the position of the indicator 202.
The measuring element 2 further comprises a movable fixing structure for movably fixing the indicator element 202 on the scale 1, which specifically comprises a threaded hole 23 formed on the indicator element 202, and a correspondingly arranged fixing bolt 24; the threaded hole 23 is formed at a position which can be opposite to the strip through hole 10 after the indication end 22 is inserted into the strip through hole 10; the fixing bolt 24 passes through the long through hole 10 from the front surface of the scale 1 to the back surface of the scale 1 and is in threaded connection with the threaded hole 23.
Further, the diameter of the portion of the fixing bolt 24 located inside the elongated through hole 10 is substantially identical to the width of the elongated through hole 10, so that the fixing bolt 24 can function together with the indicator 202 to guide and define the position of the measuring member 2.
In this embodiment, the positioning element for positioning the scale 1 at the set position includes a fixing column 3, and one end of the fixing column 3 is conical and is suitable for being nailed into the human skeleton. The fixed column 3 is provided with scale marks, preferably arranged on the side of the fixed column 3 facing the measuring part 2.
Referring to fig. 8-9, the method for using the acetabular position variation measuring device in the embodiment is as follows:
before acetabulum replacement, fixing the column 3 in a proper position, positioning the scale 1, integrally moving the measuring piece 2 on the scale 1 to enable the extending end 21 to be abutted 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;
during acetabular replacement, the staff 1 and the measuring piece 2 are taken down, the fixed column 3 is reserved, and the staff can be used as a hook for pulling and hanging muscle tissues in an operation;
after the acetabulum test mold is replaced, positioning the scale 1 again, integrally moving the measuring piece 2 on the scale 1, enabling 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 twice indication end 22 on the scale 1 is the variation of the acetabular position in the vertical direction before and after the replacement of the acetabular test mould, the variation value can affect the length of the lower limb, after the variation value is obtained, a doctor can be prompted whether to use an acetabular prosthesis with the same specification as the acetabular test mould or to replace the acetabular test mould with other specifications for re-measurement until the variation of the acetabular position before and after the installation of the acetabular test mould is within an acceptable range value, and then the acetabular prosthesis with the same specification as the corresponding acetabular test mould is adopted;
the scale values on the fixing columns 3 at the two sides are the variation of the positions of the acetabulum in the left-right direction before and after the replacement of the acetabulum test model, the value can influence the eccentricity, and after the variation data is obtained, a doctor can be prompted whether to use the acetabulum prosthesis with the same specification as the acetabulum test model or to replace the acetabulum test model with other specifications for re-measurement until the variation of the positions of the acetabulum before and after the installation of the acetabulum test model is within an acceptable range value, and then the acetabulum prosthesis with the same specification as the corresponding acetabulum test model is adopted.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (6)
1. An acetabular position change measurement apparatus, comprising:
a scale (1) having scale marks;
the positioning piece is used for positioning the scale (1) at a set position;
a measuring member (2) integrally movably mounted on the scale (1) and having an insertion end (21) adapted to be inserted into the interior of the acetabulum to abut against the top of the acetabulum, and an indicating end (22) for indicating the scale markings;
the measuring element (2) comprises:
-an arcuate member (201) having said projecting end (21);
the indicating piece (202) is fixedly connected with the arc-shaped piece (201) and is provided with the indicating end (22);
the middle part of the scale (1) is provided with a strip through hole (10) with uniform width; the indication end (22) penetrates out of the back of the scale (1) through the long strip through hole (10) to be flush with the front of the scale (1) or extends out of the front of the scale (1) by a certain height so as to indicate the scale mark;
the position of the extending end (21) which is used for abutting against the top of the acetabulum is arranged at the same height as the position of the indicating end (22) which is used for indicating the scale marks;
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;
and the fixed column (3) is provided with scale marks.
2. The acetabular position variation measurement device of claim 1, wherein: the width of the indication end (22) is basically consistent with the width of the strip through hole (10).
3. The acetabular position variation measurement device of claim 1 or 2, wherein: the measuring element (2) further comprises a movable fixing structure for movably fixing the indicator element (202) on the scale (1).
4. The acetabular position variation measurement apparatus of claim 3 wherein: the movable fixation structure includes:
a threaded hole (23) formed in the indicator (202); when the indication end (22) is inserted into the long through hole (10), the threaded hole (23) is opposite to the long through hole (10);
and a fixing bolt (24) penetrates from the front surface of the scale (1) to the back surface of the scale (1) through the long through hole (10) and is in threaded connection with the threaded hole (23).
5. The acetabular position variation measurement apparatus of claim 4 wherein: the diameter of the portion of the fixing bolt (24) located inside the long through hole (10) is basically consistent with the width of the long through hole (10).
6. The acetabular position variation measurement device of claim 1, wherein: the scale marks on the fixed column (3) are arranged on the side surface of the fixed column (3) facing one side of the measuring piece (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110286441.2A CN113017943B (en) | 2021-03-17 | 2021-03-17 | Acetabular position change measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110286441.2A CN113017943B (en) | 2021-03-17 | 2021-03-17 | Acetabular position change measuring device |
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| CN113017943A CN113017943A (en) | 2021-06-25 |
| CN113017943B true CN113017943B (en) | 2024-01-09 |
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| CN202110286441.2A Active CN113017943B (en) | 2021-03-17 | 2021-03-17 | Acetabular position change measuring device |
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| FR2775889A1 (en) * | 1998-03-13 | 1999-09-17 | Alain Grenier | Hip joint replacement guide frame |
| US6193724B1 (en) * | 1998-11-25 | 2001-02-27 | Kwan-Ho Chan | Apparatus and method for determining the relative position of bones during surgery |
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| CN113017943A (en) | 2021-06-25 |
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