CN221013282U - Knee joint pressure measuring device with independent measurement of inner side and outer side - Google Patents
Knee joint pressure measuring device with independent measurement of inner side and outer side Download PDFInfo
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- CN221013282U CN221013282U CN202322061476.3U CN202322061476U CN221013282U CN 221013282 U CN221013282 U CN 221013282U CN 202322061476 U CN202322061476 U CN 202322061476U CN 221013282 U CN221013282 U CN 221013282U
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- pressure
- knee joint
- sensor
- upper shell
- flexible
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- 210000000629 knee joint Anatomy 0.000 title claims abstract description 37
- 238000005259 measurement Methods 0.000 title abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000009530 blood pressure measurement Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 9
- 238000001746 injection moulding Methods 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 210000004872 soft tissue Anatomy 0.000 description 2
- 210000000689 upper leg Anatomy 0.000 description 2
- 208000006820 Arthralgia Diseases 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000013150 knee replacement Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model provides a knee joint pressure measuring device with independent measurement of inner and outer sides, which comprises an upper shell, a lower shell, a flexible telescopic part, two pressure detecting parts and a circuit module. The upper shell comprises two stress plates and a flexible connecting part, and the two stress plates respectively correspond to the medial condyle and the lateral condyle of the knee joint; the flexible connecting part is arranged between the two stress plates and is used for flexibly connecting the two stress plates, so that the two stress plates can freely move up and down without interference. The lower shell and the upper shell are arranged at intervals, and a gap is formed between the lower shell and the upper shell. The flexible telescopic part is respectively connected with the upper shell and the lower shell, and the upper shell and the lower shell are matched with each other in a closed gap to form a sealed inner cavity. The two pressure detection parts and the circuit module are arranged in the sealed inner cavity, and the circuit module is electrically connected with the two pressure detection parts respectively; the two pressure detection parts respectively correspond to the two stress plates, and each pressure detection part comprises a plurality of pressure detection units, and each pressure detection unit is used for detecting and outputting the pressure transmitted from the stress plate.
Description
Technical Field
The utility model belongs to the technical field of medical instruments, and particularly relates to a knee joint pressure measuring device capable of independently measuring inner and outer sides.
Background
The knee pressure measuring device is a soft tissue pressure measuring device used in total knee replacement surgery (TKA). By measuring the resultant force and the pressure center position between knee joint prostheses, a doctor is assisted to make more accurate judgment so as to select a proper prosthesis, reduce the probability of knee joint pain and deformity after operation, effectively improve the operation quality and improve the postoperative life of a patient.
The medial and lateral condyles of the distal femur are asymmetric in shape, and the intraoperative soft tissue pressures on both sides will differ, necessitating independent measurement of the pressures on both sides. The upper shell can wholly descend when the pressure of one side is measured by the existing measuring device, a certain pressure can be sensed by the sensor of the other side, namely, the pressure can be born by the measuring component of the other side, and accordingly, the measured pressure value and the actually applied pressure have errors.
Disclosure of utility model
The utility model aims to provide a knee joint pressure measuring device capable of independently measuring inner and outer sides, which solves the problem that measurement is inaccurate when measuring single sides in inner and outer condyles in the prior art.
The technical scheme of the utility model is as follows:
A knee joint pressure measurement device with independent measurement of inner and outer sides, comprising:
The upper shell comprises two stress plates and a flexible connecting part, and the two stress plates respectively correspond to the medial condyle and the lateral condyle of the knee joint; the flexible connecting part is arranged between the two stress plates and is used for flexibly connecting the two stress plates;
the lower shell is arranged at intervals with the upper shell, and a gap is formed between the lower shell and the upper shell;
The flexible telescopic part is respectively connected with the upper shell and the lower shell and seals the upper shell and the lower shell which are in clearance fit to form a sealed inner cavity;
The two pressure detection parts and the circuit module are arranged in the sealed inner cavity, and the circuit module is electrically connected with the two pressure detection parts respectively; the two pressure detection parts respectively correspond to the two stress plates, and each pressure detection part comprises a plurality of pressure detection units, and each pressure detection unit is used for detecting and outputting the pressure transmitted from the stress plate.
In the knee joint pressure measuring device with independent measurement of the inner side and the outer side, the flexible connecting part and the flexible telescopic part are integrally manufactured.
In the knee joint pressure measuring device with independent measurement of the inner side and the outer side, the flexible connecting part and/or the flexible telescopic part are/is in an organ-shaped structure.
In the knee joint pressure measuring device with independent measurement of the inner side and the outer side, the flexible connecting part and/or the flexible telescopic part are/is made of soft rubber.
In the knee joint pressure measuring device with the independent measurement of the inner side and the outer side, the flexible connecting part is an injection molding piece and is connected with the two stress plates through injection molding.
In the knee joint pressure measuring device with independent measurement of the inner side and the outer side, the lower shell is connected with the flexible connecting part in an adhesive mode.
In the knee joint pressure measuring device with independent measurement of the inner side and the outer side, the pressure detecting unit comprises a film pressure sensor and a soft cushion, the film pressure sensor is connected with the inner bottom surface of the upper shell through the soft cushion, and the film pressure sensor is used for measuring and outputting the pressure born by the upper shell and transmitted through the soft cushion.
In the knee joint pressure measuring device with independent measurement of the inner side and the outer side, the pressure detecting part further comprises a sensor pressing plate and a sensor bottom plate, and the plurality of pressure detecting units are arranged between the sensor pressing plate and the sensor bottom plate; the sensor pressing plate is connected to the inner bottom surface of the upper shell, and the sensor bottom plate is connected to the inner bottom surface of the lower shell.
In the knee joint pressure measuring device with independent measurement of the inner side and the outer side, the film pressure sensor is adhered to the sensor base plate, and two ends of the cushion are respectively abutted against the film pressure sensor and the sensor pressing plate.
In the knee joint pressure measuring device of the present utility model, the pressure detecting portions are symmetrically arranged.
By adopting the technical scheme, the utility model has the following advantages and positive effects compared with the prior art:
The knee joint pressure measuring device for independently measuring the inner side and the outer side, provided by the utility model, has the advantages that the upper shell comprises the two stress plates, and the two stress plates are flexibly connected through the flexible connecting part, so that the two stress plates can freely move up and down without interference, the influence of the stress plate on the other side can not be caused when the inner side condyle or the outer side condyle is singly detected, the measured pressure value is consistent with the actually applied pressure, and the problem of inaccurate measurement when the single side in the inner condyle and the outer condyle is measured in the prior art is solved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model.
FIG. 1 is a schematic view of a knee joint pressure measuring device of the present utility model with independent measurement of the inner and outer sides;
FIG. 2 is an exploded view of a knee joint pressure measuring device of the present utility model with independent measurement of the medial and lateral sides;
FIG. 3 is a schematic structural diagram of two stress plates, a flexible connection part and a flexible expansion part in an embodiment;
Fig. 4 is a schematic structural diagram of two stress plates, a flexible connection part and a flexible expansion part in another embodiment.
Reference numerals illustrate:
1: a force-bearing plate; 2: a flexible connection portion; 3: a flexible extension part; 4: a lower case; 5: a pressure detection unit; 6: a sensor platen; 7: a sensor base plate; 8: and a circuit module.
Detailed Description
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will explain the specific embodiments of the present utility model with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the utility model, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
For the sake of simplicity of the drawing, the parts relevant to the present utility model are shown only schematically in the figures, which do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.
Referring to fig. 1 to 4, the present embodiment provides a knee joint pressure measuring device with independent measurement of the inner and outer sides, which includes an upper case, a lower case 4, a flexible extension part 3, two pressure detecting parts, and a circuit module 8.
The upper shell comprises two stress plates 1 and a flexible connecting part 2, and the two stress plates 1 respectively correspond to the medial condyle and the lateral condyle of the knee joint; the flexible connecting part 2 is arranged between the two stress plates 1 and is used for flexibly connecting the two stress plates 1. The upper shell and the lower shell 4 are arranged at intervals, and a gap is formed between the lower shell 4 and the upper shell. The flexible telescopic part 3 is respectively connected with the upper shell and the lower shell 4, and the closed gap is matched with the upper shell and the lower shell 4 to form a sealed inner cavity.
The flexible connection part 2 needs to flexibly connect the two stress plates 1 on one hand, so that the two stress plates 1 can freely move up and down without interference, and the pressure is not distributed to the other stress plate 1 when the single stress plate 1 is pressed; on the other hand, two stress plates 1, a flexible telescopic part 3 and a lower shell 4 are matched to form a sealed inner cavity. The flexible connection part 2 may be made of soft rubber or other materials capable of satisfying the function, such as silica gel.
The flexible connection part 2 can be formed by injection molding, namely an injection molding piece. The flexible connection part 2 and the two stress plates 1 can be connected through injection molding (that is, before the flexible connection part 2 is injection molded, the stress plates 1 are placed at preset positions, and the flexible connection part 2 is directly connected with the two stress plates 1 during injection molding), or can be manufactured separately and bonded or welded together through laser.
The flexible telescopic part 3 needs to flexibly connect the upper shell and the lower shell 4 on one hand, so that the upper shell can move up and down relative to the lower shell 4, and the pressure is not distributed to the lower shell 4 when the upper shell is pressed; on the other hand, can cooperate with the upper and lower shells 4 to form a sealed cavity. The flexible connection part 2 may be made of soft rubber or other materials capable of satisfying the function, such as silica gel.
Preferably, the flexible connection part 2 and the flexible telescopic part 3 may be integrally formed and each be a soft gel of an organ-like structure (as shown in fig. 3). The whole of flexible connecting portion 2 and flexible portion 3 has certain elasticity, and can freely go up and down after two atress boards 1 atress, and both sides do not mutually interfere, and inferior valve 4 also can not divide the pressure, can all transmit pressure to pressure detection portion, realizes accurately measuring. Of course, only one of the flexible connecting portion 2 and the flexible extension portion 3 may have an organ-like structure, or neither may have an organ-like structure, but other structures, such as a flat shape (as shown in fig. 4) may be provided, and the like, without limitation. If the flexible connection part 2 and the flexible telescopic part 3 adopt straight structures, the manufacturing is relatively simple and the cost is low, but the elasticity is poor, which is not beneficial to the measurement of pressure.
In this embodiment, the flexible connection part 2 and the flexible extension part 3 are integrally made into a soft rubber product with an organ-shaped structure, and the two stress plates 1 are directly connected with the soft rubber product when the soft rubber product is injection molded; the lower shell 4 is connected with the soft rubber product in an adhesive mode.
The two pressure detection parts and the circuit module 8 are arranged in the sealed inner cavity, and the circuit module 8 is electrically connected with the two pressure detection parts respectively. The two pressure detection parts respectively correspond to the two stress plates 1, the pressure detection parts comprise a plurality of pressure detection units 5, and the pressure detection units 5 are used for detecting and outputting the pressure transmitted from the stress plates 1.
The pressure detecting section further includes a sensor platen 6 and a sensor base plate 7, and a plurality of pressure detecting units 5 are provided between the sensor platen 6 and the sensor base plate 7. The sensor pressing plate 6 is connected to the inner bottom surface of the upper shell, and the sensor bottom plate 7 is connected to the inner bottom surface of the lower shell 4. Specifically, a locating pin is arranged on the inner bottom surface of the upper shell, a locating hole is arranged on the sensor bottom plate 7, and the sensor bottom plate 7 is connected with the inner bottom surface of the upper shell through the locating pin and the locating hole; the sensor base plate 7 may be attached to the inner bottom surface of the upper case.
The pressure detection unit 5 includes a film pressure sensor electrically connected to the circuit module 8 through a wire and a cushion. The membrane pressure sensor is connected with the inner bottom surface of the upper shell through a soft cushion, and is used for measuring and outputting the pressure born by the upper shell and transmitted through the soft cushion. Specifically, the film pressure sensor is adhered to the sensor base plate 7, more specifically, the film pressure sensor can be adhered to the sensor base plate 7 through double faced adhesive tape; the two ends of the soft cushion are respectively abutted against the film pressure sensor and the sensor pressing plate 6. When the upper shell moves relative to the lower shell 4, the sensor pressing plate 6 is driven to move up and down, and pressure is transmitted to the film pressure sensor through the soft cushion. Preferably, the two pressure detecting portions are symmetrically arranged.
In the TKA procedure, the knee joint pressure measuring device of the present embodiment, with its inner and outer sides independently measured, is placed between knee joint prostheses, wherein the inferior shell 4 is placed on the tibial plateau and the two force plates 1 are in contact with the distal medial and lateral condyles of the femur, respectively. The two stress plates 1 respectively descend, so that the sensor pressing plates 6 on the two sides descend, and the pressures on the two stress plates 1 are respectively and completely transmitted to the corresponding pressure detection parts. The resultant force and the center point of the one-side pressure can be calculated by the pressure values detected by all the film pressure sensors in the pressure detection part on one side.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments. Even if various changes are made to the present utility model, it is within the scope of the appended claims and their equivalents to fall within the scope of the utility model.
Claims (10)
1. A knee joint pressure measuring device for independently measuring the pressure of an inner side and an outer side, comprising:
The upper shell comprises two stress plates and a flexible connecting part, and the two stress plates respectively correspond to the medial condyle and the lateral condyle of the knee joint; the flexible connecting part is arranged between the two stress plates and is used for flexibly connecting the two stress plates;
the lower shell is arranged at intervals with the upper shell, and a gap is formed between the lower shell and the upper shell;
The flexible telescopic part is respectively connected with the upper shell and the lower shell and seals the upper shell and the lower shell which are in clearance fit to form a sealed inner cavity;
The two pressure detection parts and the circuit module are arranged in the sealed inner cavity, and the circuit module is electrically connected with the two pressure detection parts respectively; the two pressure detection parts respectively correspond to the two stress plates, and each pressure detection part comprises a plurality of pressure detection units, and each pressure detection unit is used for detecting and outputting the pressure transmitted from the stress plate.
2. The medial-lateral independent knee joint pressure measurement device of claim 1, wherein the flexible connection section and the flexible telescoping section are integrally formed.
3. The knee joint pressure measurement device of claim 1, wherein the flexible connection section and/or the flexible telescoping section is of an accordion-like configuration.
4. The medial-lateral independent knee joint pressure measurement device of claim 1, wherein the flexible connection and/or the flexible telescoping portion is made of soft gel.
5. The knee joint pressure measurement device of claim 1, wherein the flexible connection part is an injection-molded part and is connected with the two stress plates through injection molding.
6. The medial-lateral independent knee joint pressure measurement device of claim 1, wherein the inferior shell is adhesively attached to the flexible connection.
7. The knee joint pressure measuring device of claim 1, wherein the pressure detecting unit comprises a membrane pressure sensor and a cushion, the membrane pressure sensor and the inner bottom surface of the upper case are connected through the cushion, and the membrane pressure sensor is used for measuring and outputting the pressure applied to the upper case transmitted through the cushion.
8. The knee joint pressure measurement apparatus of claim 7, wherein the pressure detection part further comprises a sensor platen and a sensor base plate, the plurality of pressure detection units being provided between the sensor platen and the sensor base plate; the sensor pressing plate is connected to the inner bottom surface of the upper shell, and the sensor bottom plate is connected to the inner bottom surface of the lower shell.
9. The medial-lateral independent knee joint pressure measurement device of claim 8, wherein the membrane pressure sensor is bonded to the sensor base plate, and wherein the two ends of the cushion abut the membrane pressure sensor and the sensor pressure plate, respectively.
10. The medial-lateral independent knee joint pressure measurement device of claim 1, wherein two of the pressure sensing portions are symmetrically disposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322061476.3U CN221013282U (en) | 2023-08-02 | 2023-08-02 | Knee joint pressure measuring device with independent measurement of inner side and outer side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322061476.3U CN221013282U (en) | 2023-08-02 | 2023-08-02 | Knee joint pressure measuring device with independent measurement of inner side and outer side |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221013282U true CN221013282U (en) | 2024-05-28 |
Family
ID=91174048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322061476.3U Active CN221013282U (en) | 2023-08-02 | 2023-08-02 | Knee joint pressure measuring device with independent measurement of inner side and outer side |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221013282U (en) |
-
2023
- 2023-08-02 CN CN202322061476.3U patent/CN221013282U/en active Active
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