Knee joint pressure detection device and method

Abstract

The invention discloses a knee joint pressure detection device and method, and relates to the technical field of medical instruments. The top surface of the pressure monitoring device is matched with the knee joint contour of the human leg knee joint model; a pulley device; the weight box is used for placing weights and is in transmission connection with the human leg and knee joint model through a pull rope and a pulley device; and the human leg and knee joint model is configured to rotate on the top surface of the pressure monitoring device under the driving of the weight box, the pull rope and the pulley device. Through the detection device of a specific structure, the knee joint movement condition is simulated, so that knee joint pressure detection is carried out, and convenience is provided for product design work.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a knee joint pressure detection device and method. Background Art

[0002] With the further aging of the population, medical needs are increasing year by year. For knee replacement surgery, doctors could only judge the effect of the surgery based on experience. Only very experienced doctors could satisfy patients once, and if patients were not satisfied, they would most likely need a second surgery. If detection tools could be used during surgery to judge the effect of the surgery, this would have a great impact on medical resources and patient satisfaction.

[0003] However, the space created during knee replacement surgery is very small, and my country has strict regulations on medical devices placed in the human body, making the development of similar products very difficult. Most existing products have fewer measurement points, use hard materials for the outer shell, and have low reliability.

[0004] Therefore, in order to better perform knee joint pressure detection and facilitate product design work, a knee joint pressure detection technology is now provided. Summary of the invention

[0005] In view of the defects existing in the prior art, the purpose of this application is to provide a knee joint pressure detection device and method, which simulates the knee joint movement through a detection device with a specific structure, thereby performing knee joint pressure detection and providing convenience for product design work.

[0006] In order to achieve the above objectives, the technical solution adopted by this application is:

[0007] In a first aspect, the present application provides a knee joint pressure detection device, the detection device comprising:

[0008] Pressure monitoring device;

[0009] A human leg knee joint model, wherein the top surface of the pressure monitoring device matches the knee joint contour of the human leg knee joint model;

[0010] pulley device;

[0011] A weight box for placing weights, which is transmission-connected to the human leg knee joint model via a pull rope and the pulley device;

[0012] The human leg knee joint model is configured to be rotatable on the top surface of the pressure monitoring device under the drive of the weight box, the pull rope and the pulley device.

[0013] On the basis of the above technical solution, the detection device further includes:

[0014] Test platform;

[0015] The pressure monitoring device is fixed on the top surface of the test platform.

[0016] On the basis of the above technical solution, the surface structure and surface material of the top surface of the pressure monitoring device and the knee joint contact area of ​​the human leg knee joint model are replaceable.

[0017] Based on the above technical solution, a plurality of weights can be placed in the weight box.

[0018] On the basis of the above technical solution, the human leg knee joint model can be rotatably pressed on the pressure monitoring device by means of a rubber band simulating human fascia.

[0019] Based on the above technical solution, the top surface of the pressure monitoring device is made of soft material.

[0020] In a second aspect, the present application provides a detection method based on the knee joint pressure detection device mentioned in the first aspect, the detection method comprising the following steps:

[0021] A weight of a set weight is placed in a weight box, and the weight box is used to drive the human leg knee joint model to rotate on the pressure monitoring device, and the monitoring data of the pressure monitoring device is recorded;

[0022] Replacing the surface structure or surface material of the contact area between the top surface of the pressure monitoring device and the knee joint of the human leg knee joint model;

[0023] After the surface structure or surface material is replaced, the weight box is used to drive the human leg knee joint model to rotate on the pressure monitoring device, and the monitoring data of the pressure monitoring device is recorded;

[0024] Record different surface structures and different surface materials, and the corresponding monitoring data.

[0025] Compared with the prior art, the advantages of this application are:

[0026] The present application uses a detection device with a specific structure to simulate the movement of the knee joint, thereby performing knee joint pressure detection, providing convenience for product design work. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1This is a schematic diagram of the structure of a knee joint pressure detection device according to an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the structure of a pressure monitoring device in a knee joint pressure detection device according to an embodiment of the present application;

[0030] In the figure:

[0031] 1. Pressure monitoring device; 2. Human leg knee joint model; 3. Pulley device; 4. Weight box; 5. Pull rope. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings.

[0034] The embodiments of the present application provide a knee joint pressure detection device and method, which simulates the knee joint movement through a detection device with a specific structure, thereby performing knee joint pressure detection, providing convenience for product design work.

[0035] In order to achieve the above technical effects, the overall idea of ​​this application is as follows:

[0036] A knee joint pressure detection device, the detection device comprising:

[0037] Pressure monitoring device 1;

[0038] A human leg knee joint model 2, wherein the top surface of the pressure monitoring device 1 matches the knee joint contour of the human leg knee joint model 2;

[0039] Pulley device 3;

[0040] A weight box 4 for placing weights, which is connected to the human leg knee joint model 2 through a pull rope 5 and the pulley device 3;

[0041] The human leg knee joint model 2 is configured to be rotatable on the top surface of the pressure monitoring device 1 under the drive of the weight box 4, the pull rope 5 and the pulley device 3.

[0042] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings.

[0043] First, see Figures 1-2As shown, an embodiment of the present application provides a knee joint pressure detection device, the detection device comprising:

[0044] Pressure monitoring device 1;

[0045] A human leg knee joint model 2, wherein the top surface of the pressure monitoring device 1 matches the knee joint contour of the human leg knee joint model 2;

[0046] Pulley device 3;

[0047] A weight box 4 for placing weights, which is connected to the human leg knee joint model 2 through a pull rope 5 and the pulley device 3;

[0048] The human leg knee joint model 2 is configured to be rotatable on the top surface of the pressure monitoring device 1 under the drive of the weight box 4, the pull rope 5 and the pulley device 3.

[0049] Specifically, the pressure monitoring device 1 is fixed on the table, and the human leg knee joint model 2 is tied to the table by a rubber band to simulate the human fascia, and pressed on the pressure detection device 1;

[0050] Tie the pull rope 5 to the human leg knee joint model 2 and pass it around the pulley 3. By controlling the number of weights placed in the weight box 4, the human leg knee joint model 2 is rotated and the total mass of the weights is recorded.

[0051] The upper surface of the pressure monitoring device 1 is made of soft material. This solution improves the performance of the monitoring device through material and surface treatment.

[0052] In the embodiment of the present application, a detection device with a specific structure is used to simulate the movement of the knee joint, thereby performing knee joint pressure detection, which provides convenience for product design work.

[0053] It should be noted that the measurement point offset of the detection device was found when the lower leg was moving. Using the human skeleton model, it was inferred that it was caused by friction. Therefore, it was decided to further explore the material and process of the shell.

[0054] The mainstream medical-grade flexible materials are silicone and polyurethane PU, both of which have good biocompatibility, good material properties, and controllable hardness.

[0055] Test method: After fixing the pressure monitoring device, add a human leg bone model on top and use a rubber band to simulate the human fascia to press the leg bone model on top of the monitoring device. Tie a line on the leg bone, extend it horizontally to the turntable and connect a small box for placing weights to the other end of the line. Compare the friction force by comparing the total weight of the weights that make the leg bone rotate.

[0056] Results comparison: The hardness was set at 30a-90a with a spacing of 10. It was found that the higher the hardness, the smaller the friction. However, the sensitivity of the sensor decreased with the increase of hardness. Polyurethane can achieve higher hardness and better rebound performance. When the hardness reaches 90a, the sensitivity still meets the performance requirements, so the hardness is selected as 90a.

[0057] And through the surface treatment process, an additional glaze coating is added to the surface of the polyurethane to further reduce friction.

[0058] Furthermore, doctors need to move the patient's legs during surgery. Reducing the friction on the surface of the pressure monitoring device can improve the accuracy of the pressure monitoring device, help doctors judge the postoperative effect during knee replacement surgery, help save medical resources, and improve patient satisfaction.

[0059] This indirectly reduces the surgical cost of knee replacement surgery and effectively prevents the occurrence of secondary surgery.

[0060] Furthermore, the detection device also includes:

[0061] Test platform 6;

[0062] The pressure monitoring device 1 is fixed on the top surface of the test platform 6 .

[0063] Furthermore, the surface structure and surface material of the top surface of the pressure monitoring device 1 and the knee joint contact area of ​​the human leg knee joint model 2 are replaceable.

[0064] Furthermore, a plurality of weights can be placed in the weight box 4 .

[0065] Furthermore, the human leg knee joint model 2 can be rotatably pressed on the pressure monitoring device 1 by simulating human fascia with a rubber band.

[0066] Furthermore, the top surface of the pressure monitoring device 1 is made of soft material.

[0067] In a second aspect, an embodiment of the present application provides a detection method based on the knee joint pressure detection device mentioned in the first aspect, and the detection method comprises the following steps:

[0068] S1. Place a weight of a set weight in a weight box 4, use the weight box 4 to drive the human leg knee joint model 2 to rotate on the pressure monitoring device 1, and record the monitoring data of the pressure monitoring device 1;

[0069] S2, replacing the surface structure or surface material of the contact area between the top surface of the pressure monitoring device 1 and the knee joint of the human leg knee joint model 2;

[0070] S3, after the surface structure or surface material is replaced, the weight box 4 is used to drive the human leg knee joint model 2 to rotate on the pressure monitoring device 1, and the monitoring data of the pressure monitoring device 1 is recorded;

[0071] S4. Record the corresponding monitoring data of different surface structures and different surface materials.

[0072] In the embodiment of the present application, a detection device with a specific structure is used to simulate the movement of the knee joint, thereby performing knee joint pressure detection, which provides convenience for product design work.

[0073] It should be noted that the knee joint pressure detection method mentioned in the embodiment of the present application is similar to the knee joint pressure detection device mentioned in the first aspect in terms of technical issues, technical solutions and technical effects, and is similar in terms of counting principles, so it will not be elaborated here.

[0074] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0075] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0076] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A knee joint pressure detection device, characterized in that: The detection device comprises: Pressure monitoring device (1); A human leg knee joint model (2), wherein the top surface of the pressure monitoring device (1) matches the knee joint contour of the human leg knee joint model (2); Pulley device (3); A weight box (4) for placing weights, which is connected to the human leg knee joint model (2) through a pull rope (5) and the pulley device (3); The human leg knee joint model (2) is configured to be rotatable on the top surface of the pressure monitoring device (1) under the drive of the weight box (4), the pull rope (5) and the pulley device (3).

2. The knee joint pressure detection device according to claim 1, characterized in that: The detection device also includes: Test platform (6); The pressure monitoring device (1) is fixed on the top surface of the test platform (6).

3. The knee joint pressure detection device according to claim 1, characterized in that: The surface structure and surface material of the top surface of the pressure monitoring device (1) and the knee joint contact area of ​​the human leg knee joint model (2) are replaceable.

4. The knee joint pressure detection device according to claim 1, characterized in that: A plurality of weights can be placed in the weight box (4).

5. The knee joint pressure detection device and method according to claim 1, characterized in that: The human leg knee joint model (2) is rotatably pressed on the pressure monitoring device (1) by means of a rubber band simulating human fascia.

6. The knee joint pressure detection device and method according to claim 1, characterized in that: The top surface of the pressure monitoring device (1) is made of soft material.

7. A detection method based on the knee joint pressure detection device according to any one of claims 1 to 6, characterized in that: The detection method comprises the following steps: A weight of a set weight is placed in a weight box (4), and the weight box (4) is used to drive a human leg knee joint model (2) to rotate on a pressure monitoring device (1), and monitoring data of the pressure monitoring device (1) is recorded; Replacing the surface structure or surface material of the contact area between the top surface of the pressure monitoring device (1) and the knee joint of the human leg knee joint model (2); After the surface structure or surface material is replaced, the weight box (4) is used to drive the human leg knee joint model (2) to rotate on the pressure monitoring device (1), and the monitoring data of the pressure monitoring device (1) is recorded; Record different surface structures and different surface materials, and the corresponding monitoring data.

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