CN219439456U - Joint clearance measurer - Google Patents
Joint clearance measurer Download PDFInfo
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- CN219439456U CN219439456U CN202320398769.8U CN202320398769U CN219439456U CN 219439456 U CN219439456 U CN 219439456U CN 202320398769 U CN202320398769 U CN 202320398769U CN 219439456 U CN219439456 U CN 219439456U
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- movable scale
- catheter
- joint clearance
- scale
- joint
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model belongs to the field of medical instruments, and provides a joint clearance measurer, which comprises a guide pipe, wherein a guide structure is arranged at the first end of the guide pipe, a movable scale is arranged in the guide pipe, and the length of the movable scale is larger than that of the guide pipe; the measuring end of the movable scale can pass through the guide structure and extend out of the first end of the catheter; the operating end of the movable scale can extend out of the second end of the catheter; the included angle between the part of the movable scale in the catheter and the part of the movable scale passing through the guide structure and extending out of the first end of the catheter is between 60 and 120 degrees; and the measuring end of the movable scale is provided with a scale. The use of the joint clearance gauge according to the present utility model is not limited by the measurement site. Particularly during surgery, allows the user to easily measure areas that cannot be measured by existing ruler-type gauges.
Description
Technical Field
The utility model belongs to the field of medical instruments, and particularly relates to a joint clearance measurer.
Background
The joint space refers to the space between bones. Normal joint play is the basis for which the joint can move. Some diseases of bone joints can cause changes in joint clearances, and can also affect corresponding joints, such as joint pain, limited movement, and the like. The reduction of the joint space is generally considered to be caused by the wear of the articular cartilage. Severe joint stenosis should be considered with joint replacement if necessary to ameliorate local symptoms. The widening of the joint space is mostly caused by injury of joint ligaments, joint capsule relaxation, inflammation or effusion. There are various reasons for the change of joint space, and common reasons are: traumatic arthritis, degenerative osteoarthritis, rheumatic or rheumatoid arthritis, gouty arthritis, infectious arthritis, such as chronic suppurative arthritis and tuberculous arthritis, etc. Accurate measurement of joint space facilitates knowledge of the extent of the lesion, preparation of accurate surgical protocols, and real-time adjustment of the treatment protocol during clinical treatment.
In orthopedic surgery, accurate measurements of the joint space are required to formulate an accurate surgical plan. In the prior art, indirect data are obtained through imaging pictures such as X-rays, spiral CT and the like in joint clearance measurement. The measuring instrument used in the current operation process is generally a ruler, and cannot accurately measure the size of the cavity according to the size of the cavity. The measuring end of the measurer needs to form a proper angle with the joint gap to be measured to accurately measure. When the joint gap to be measured and the measurer cannot form 90 degrees, the measurement cannot be performed.
There is no joint clearance measurer capable of solving the technical problem in the prior art.
Disclosure of Invention
The utility model provides a joint clearance measurer, which aims to solve the problem that the measurer cannot be placed and cannot accurately measure due to the special position of bones in the prior art.
The utility model provides a joint clearance measurer, which comprises a guide pipe, wherein the guide pipe comprises a first end and a second end, the first end of the guide pipe is provided with a guide structure, a movable scale is arranged in the guide pipe, the movable scale comprises a measuring end and an operating end, and the length of the movable scale is larger than that of the guide pipe; the measuring end of the movable scale can pass through the guide structure and extend out of the first end of the catheter; the operating end of the movable scale can extend out of the second end of the catheter; the included angle between the part of the movable scale in the catheter and the part of the movable scale passing through the guide structure and extending out is between 60 and 120 degrees; and is also provided with
The measuring end of the movable scale is provided with a scale.
Optionally, a portion of the movable scale within the conduit is at a 90 ° angle to a portion of the movable scale passing through the guide structure and extending beyond the first end of the conduit.
Optionally, the movable scale is arcuate in cross-section across its width in the flat condition.
Optionally, an opening is formed in a side face of the first end of the catheter, the guiding structure is a cambered surface facing the opening, and a concave surface of the cambered surface faces the opening.
Optionally, the limit protrusion is in contact with a concave surface of the movable scale.
Optionally, the catheter is of a transparent structure, a scale is arranged on the catheter, and a zero mark is arranged on the movable scale.
Optionally, the graduation value of the scale is 1mm.
Optionally, the second end of the catheter is provided with a grip.
Optionally, a stop hook is arranged at the measuring end of the movable scale.
The joint clearance gauge according to the utility model comprises a movable scale freely movable in the catheter, the part of the movable scale inside the catheter being at an angle of between 60 ° and 120 ° to the part of the movable scale extending past the guide structure, such an arrangement being capable of measuring the joint clearance from another angle. Particularly during minimally invasive surgery, allows the user to easily measure locations that are not reachable by existing ruler-type gauges.
Drawings
FIG. 1 is a schematic overall view of the structure of an joint clearance gauge according to the present utility model;
FIG. 2 is a cross-sectional view of the structure of the joint clearance gauge according to the present utility model;
fig. 3 is a partial schematic view of a guide structure of an joint clearance gauge according to the present utility model.
Wherein: a movable scale 1, a measuring end 11, an operating end 12, a catheter 2, a guiding structure 3 and a handle 4.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The joint clearance measurer according to the present utility model can measure the joint clearance from various angles.
In this application, the "measuring end" of the movable scale means the end that is close to or in contact with the object to be measured. In this application, the "distal end" is the end that is remote from the body, for example, the "distal-most end of the measuring end of the movable scale" refers to the measuring end of the movable scale that is remote from the movable scale body. In contrast, the "operative end" refers to the end of the movable scale that is movable within the catheter during use of the joint clearance gauge by a user, the operative end extending beyond the second end of the catheter. For example, pulling the operating end of the movable scale from the catheter may cause the measuring end of the movable scale to become smaller; conversely, pushing the operative end of the movable scale into the catheter may lengthen the measuring end of the movable scale.
The joint space refers to the space between bones. Some diseases of bone joints can cause changes in joint clearances, and can also affect corresponding joints, such as joint pain, limited movement, and the like. Accurate measurement of joint space is helpful for knowing the extent of lesions, preparing accurate surgical protocols and adjusting the treatment protocols in real time during clinical treatment, and maintaining proper joint space during surgical treatment is one of the key factors for postoperative functional rehabilitation. Thus, accurate measurement of joint space is important in the clinical sports medicine department.
Example 1
The present embodiment provides a joint clearance measurer for measuring joint clearance in a minimally invasive surgery process, and in the present embodiment, knee joint clearance is taken as an example. The joint clearance measurer comprises a guide pipe 2, wherein the guide pipe comprises a first end and a second end, the first end of the guide pipe 2 is provided with a guide structure 3, a movable scale 1 is arranged in the guide pipe 2, the movable scale 1 comprises a measuring end 11 and an operating end 12, and the length of the movable scale 1 is larger than that of the guide pipe 2; the measuring end 11 of the movable scale 1 is able to pass the guiding structure 3 and extend beyond the first end of the catheter 2; the operating end 12 of the movable scale 1 can extend beyond the second end of the catheter 2;
the angle between the part inside the conduit 2 and the part of the movable scale 1 passing through the guiding structure 3 and extending is between 80 and 100 degrees. Specifically, the side of the first end of the catheter 2 is provided with an opening, and the guiding structure 3 is a cambered surface facing the opening, and the concave surface of the cambered surface faces the opening. The movable scale 1 changes direction, such as 120 °, 100 °, 90 °, 80 °, 70 °, 60 °, when passing the guide structure 3. In this embodiment the angle between the part of the movable scale 1 in the catheter 2 and the part of the movable scale 1 passing the guiding structure 3 and protruding is 90 °, i.e. the movable scale 1 changes by 90 ° when passing the opening and extending.
Due to the limitation of minimally invasive surgical incisions, a measuring ruler in the prior art is used for being placed at a knee joint in a manner perpendicular to the knee joint gap to finish the measurement of the joint gap, and the limitation is that the measured data of the joint cavity space is inaccurate. When using the joint clearance gauge according to the utility model, the measurement of the joint clearance can be done at a smaller incision, for example an incision of 20mm width. When the size of the joint gap is 10mm, the portion of the movable scale 1 of the joint gap measurer extending through the guide structure 3 may be 15mm, so that the extending portion may be completely placed in the incision, closely attached to the joint gap to be measured, to complete the measurement of the joint gap.
After the measurement is completed, the user can pull the operating end 12 of the movable scale so that the measuring end 11 of the movable scale 1 is completely placed in the catheter 2 to receive and protect the movable scale 1.
Example two
On the basis of the first embodiment, this embodiment further includes the following designs: as shown in fig. 3, the movable scale 1 of the joint clearance measuring device of the present embodiment has an arc-shaped cross section in width in a straight state. The strength of the movable scale 1 can be increased by adopting the arc-shaped section, and the movable scale 1 is not easy to deform. Preferably, the movable scale is made of steel, which has sufficient strength and is not easily deformed during measurement. The movable scale has certain strength and toughness.
In addition, a limit protrusion (not shown in the figure) is provided on the inner wall of the guide tube facing the guide structure, and the limit protrusion is in contact with the movable scale. The outer edge of the limit projection in this embodiment is smooth, in this embodiment a hemisphere. The protrusion of the semicircle body can enable the movable scale to be clung to the inner wall of the guide pipe at the guide structure. Specifically, when the arc concave surface of the movable scale is in contact with the limit protrusion, the movable scale is tightly attached to the inner wall of the catheter at the guide structure, namely, the direction change position of the movable scale. Such an arrangement reduces measurement errors due to inconsistent bending of the movable scale at the guide structure.
Example III
On the basis of the first embodiment, the implementation further comprises the following design: the catheter 2 is of a transparent structure, scales are arranged on the catheter, and zero marks (not shown in the figure) are arranged on the movable scales. According to this embodiment, the most distal end of the measuring end of the catheter 2 is a zero reading, and the user can obtain the measurement result by observing the measuring end of the catheter during measurement. The graduation value of the graduation is 1mm, and the device is suitable for measuring most joint gaps.
In the present embodiment, the measuring end of the movable scale 1 is provided with a stopper hook (not shown in the figure). The stop hook is located at the most distal end of the measuring end of the movable scale 1. The stop hook prevents the movable scale 1 from retracting into the catheter 2 and disengaging from the catheter 2 during use.
Example IV
During surgery, the user will not be able to read directly from the measuring end 11 of the movable scale in case the skin and muscle tissue covers the joint space. This case is applicable to the present embodiment.
According to this embodiment, the catheter 2 is of transparent construction, and the catheter 2 has graduations (not shown in the figure) with graduation values of 1mm. The data show that most of the joint space to be measured is between 5mm and 15 mm. For example, a normal width of the medial or lateral knee joint gap is less than 8mm, and a medial gap greater than 10mm indicates a medial collateral ligament rupture. Greater than 15mm should be considered to incorporate anterior cruciate ligament rupture. On the varus compression (image) plate, the lateral collateral ligament rupture can be diagnosed when the lateral clearance is greater than 10 mm. An index value of 1mm is particularly suitable for measuring these gaps.
On the basis of the first embodiment, the implementation further comprises the following design: the movable scale 1 is provided with a zero mark (not shown in the figure) matched with the scale on the catheter 2, and the zero mark can be a black or red transverse line, and the width of the transverse line is smaller than the scale graduation value of the catheter 2. And the zero mark moves with the movement of the movable scale 1. When the most distal end of the measuring end of the movable scale 1 is flush with the outlet of the catheter 2, the reading of the movable scale 1 is zero, i.e. the zero mark is located at the zero point of the scale of the catheter 2. At this time, the user pushes the operating end of the movable scale into the catheter to extend the measuring end of the movable scale, and when the most distal end of the measuring end of the movable scale 1 reaches the measuring end point, the zero mark on the movable scale 1 is at the stop position of the scale on the catheter, namely the measured reading. Such an arrangement facilitates the user's reading when it is difficult to observe the reading from the measuring end of the movable scale 1.
For example, the measuring end of the joint clearance gauge of the present embodiment is placed at one end of the joint clearance, at which time the movable scale 1 is flush with the outlet of the catheter 2 and reads zero. Pushing the operating end 11 of the movable scale 1 into the catheter causes the measuring end 11 of the movable scale to extend out of the catheter 2 at the exit of the end of the guiding structure 3 and eventually to rest at the other end of the joint space, at which time the reading on the catheter 2, i.e. the three-dimensional space of the joint, is observed.
Example five
On the basis of the first embodiment, the implementation further comprises the following design: as shown in fig. 1, the second end of the catheter 2 in this embodiment is provided with a grip 4. The grip 4 is in this embodiment arranged perpendicular to the catheter 2. The measurer is convenient for a user to hold in the using process.
Example six
On the basis of the first embodiment, the implementation further comprises the following design: the measuring end 11 of the movable scale 1 in this embodiment is provided with a stop hook (not shown in the figure), and when the user cannot observe the end point to be measured with naked eyes, the stop hook can enable the user to feel a pause when the measuring end 11 of the movable scale 1 touches the end point to be measured, and the user can read the end point. The operating end 12 of the movable scale 1 in this embodiment is also provided with a stop hook (not shown) to prevent the movable scale 1 from coming too far into the catheter 2 and coming out of the catheter.
The joint clearance measurer according to the present utility model can measure the joint clearance from another angle. Thanks to the guiding structure provided at the first end of the catheter, the direction of the measuring end of the movable tape measure may be changed, so that the use of the joint clearance gauge according to the utility model is not limited by the measuring site. Particularly during surgery, allows the user to easily measure areas that cannot be measured by existing ruler-type gauges.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The joint clearance measurer is characterized by comprising a guide pipe, wherein the guide pipe comprises a first end and a second end, a guide structure is arranged at the first end of the guide pipe, a movable scale is arranged in the guide pipe, the movable scale comprises a measuring end and an operating end, and the length of the movable scale is larger than that of the guide pipe;
the measuring end of the movable scale can pass through the guide structure and extend out of the first end of the catheter; the operating end of the movable scale can extend out of the second end of the catheter;
the included angle between the part of the movable scale in the catheter and the part of the movable scale passing through the guide structure and extending out of the first end of the catheter is between 60 and 120 degrees; and is also provided with
The measuring end of the movable scale is provided with a scale.
2. The joint clearance gauge according to claim 1, wherein the portion of the movable scale within the catheter is at a 90 ° angle to the portion of the movable scale passing through the guide structure and extending beyond the first end of the catheter.
3. The joint clearance gauge according to claim 1, wherein the movable scale is arcuate in cross section in width in a flat condition.
4. The joint clearance gauge according to claim 1, wherein the side of the first end of the guide tube is provided with an opening, the guide structure is a cambered surface facing the opening, and a concave surface of the cambered surface faces the opening.
5. The joint clearance gauge according to claim 4, wherein a limit projection is provided on an inner wall of the guide tube facing the guide structure, the limit projection being in contact with the movable scale.
6. The joint clearance gauge according to claim 5, wherein the limit projection is in contact with a concave surface of the movable scale.
7. The joint clearance gauge according to any one of claims 1 to 6, wherein the catheter is of transparent construction and has graduations thereon, and the movable scale is provided with zero marks thereon.
8. The joint clearance gauge according to any one of claims 1 to 6, characterized in that the graduation value of the graduation is 1mm.
9. The joint clearance gauge according to any one of claims 1 to 6, wherein the second end of the catheter is provided with a grip.
10. The joint clearance gauge according to any one of claims 1 to 6, characterized in that a measuring end of the movable scale is provided with a stop hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320398769.8U CN219439456U (en) | 2023-02-24 | 2023-02-24 | Joint clearance measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320398769.8U CN219439456U (en) | 2023-02-24 | 2023-02-24 | Joint clearance measurer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219439456U true CN219439456U (en) | 2023-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320398769.8U Active CN219439456U (en) | 2023-02-24 | 2023-02-24 | Joint clearance measurer |
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| CN (1) | CN219439456U (en) |
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2023
- 2023-02-24 CN CN202320398769.8U patent/CN219439456U/en active Active
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