Knee joint angle measurer

Abstract

The utility model relates to the technical field of medical auxiliary instruments, in particular to a knee joint angle measurer which comprises a connecting piece, a first fixing piece, a second fixing piece and a third fixing piece, the connecting piece is arranged on the second fixing piece, one end of the connecting piece is connected with the first fixing piece, and the other end of the connecting piece is connected with the third fixing piece; the length of one end of the connecting piece is adjustable, so that one end of the connecting piece keeps straight and is parallel to a first straight line, and the length of the other end of the connecting piece is adjustable, so that the other end of the connecting piece keeps straight and is parallel to a second straight line; the included angle between one end and the other end of the connecting piece is the included angle between the thighbone and the tibia of the patient. In the application, one end of the connecting piece is taken as the reference datum of the femur axis of the patient, and the other end of the connecting piece is taken as the reference datum of the tibia axis of the patient, so that the influence of the body shape of the patient is avoided, the measurement precision is improved, and accurate reference data is provided for a treatment scheme of a doctor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical auxiliary devices, in particular to a knee joint angle measuring device. BACKGROUND

[0002] With the aging of the population and changes in lifestyle, the number of patients with knee joint lesions is increasing year by year, among which knee arthritis is one of the most common types of knee joint lesions. Knee joint lesions not only cause pain, but also seriously affect the range of motion of the knee joint. Therefore, accurate measurement of the range of motion of the knee joint becomes a key step in developing an effective treatment plan.

[0003] In the prior art, in order to evaluate the degree of knee joint lesions and develop a corresponding treatment plan, it is usually necessary to measure the flexion and extension angles of the knee joint. These measurements are crucial to understanding the functional status of the knee joint. The traditional method mainly relies on physical measurement tools outside the body to evaluate these angles. However, the existing measurement tools have limited length and cannot meet the requirements for accurate measurement of the flexion and extension angles of the knee joint. Specifically, in order to obtain accurate data, the measurement tool must be able to measure along the axis of the femur and tibia. Generally, the line between the greater trochanter and the lateral epicondyle represents the reference line of the femur, and the line between the lateral epicondyle and the lateral malleolus represents the reference line of the tibia. However, due to the limitations of existing tools, it is difficult to achieve this level of accuracy. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a knee joint angle measuring device that is highly adaptable and has high measurement accuracy.

[0005] In order to achieve the above-mentioned purpose, in a first aspect, the present application provides a knee joint angle measuring device, comprising:

[0006] A first fixing member, a second fixing member and a third fixing member, the first fixing member and the second fixing member are fixed on the patient's leg along a first straight line, the first straight line is parallel to the axial direction of the patient's femur, the second fixing member and the third fixing member are fixed on the patient's leg along a second straight line, the second straight line is parallel to the axial direction of the patient's tibia and intersects the first straight line at the patient's knee joint, the included angle between the first straight line and the second straight line is the included angle between the patient's femur and tibia;

[0007] A connecting member is provided on the second fixing member, one end of the connecting member is connected to the first fixing member, and the other end of the connecting member is connected to the third fixing member;

[0008] The length of one end of the connecting member is adjustable so that the one end of the connecting member remains straight and parallel to the first straight line, and / or the length of the other end of the connecting member is adjustable so that the other end of the connecting member remains straight and parallel to the second straight line.

[0009] The included angle between the one end and the other end of the connecting member is the included angle between the femur and the tibia of the patient.

[0010] In an optional embodiment, the second fixing member is provided with a mounting through hole, and the connecting member is arranged in the mounting through hole of the second fixing member.

[0011] In an optional embodiment, the connecting member and the mounting through hole of the second fixing member are clearance fit, so that the connecting member can slide in the mounting through hole.

[0012] In an optional embodiment, the connecting member is a flexible connecting rope with telescopic length.

[0013] In an optional embodiment, the connecting member is fixedly arranged in the mounting through hole of the second fixing member.

[0014] Or, the connecting member and the mounting through hole of the second fixing member are clearance fit.

[0015] In an optional embodiment, the first fixing member and / or the third fixing member is provided with a rotating shaft for winding and storing the connecting member, and the rotating shaft is rotationally arranged and drivenly connected with a coil spring.

[0016] In an optional embodiment, the device further comprises:

[0017] A measuring disc is arranged on the second fixing member coaxially with the second fixing member, and the measuring disc is provided with an angle scale.

[0018] In an optional embodiment, the measuring disc is rotationally connected with the second fixing member.

[0019] In an optional embodiment, the first fixing member, the second fixing member and / or the third fixing member are adsorptively fixed on the leg of the patient.

[0020] In an optional embodiment, the first fixing member, the second fixing member and / or the third fixing member are adhesively fixed on the leg of the patient.

[0021] In the present application, one end of the connecting member is taken as the reference datum of the femoral axis of the patient, and the other end of the connecting member is taken as the reference datum of the tibial axis of the patient, which is not affected by the body type of the patient, improves the measurement accuracy, and provides accurate reference data for the treatment plan of the doctor.

[0022] Other features and advantages of the present application will be illustrated in the following detailed description of embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 A perspective view of a use state of one of the embodiments of the knee joint angle measuring device provided by the present application;

[0025] Figure 2 A two-view structural schematic diagram of one of the embodiments of the knee joint angle measuring device provided by the present application;

[0026] Figure 3 A three-view structural schematic diagram of a partial structure of one of the embodiments of the knee joint angle measuring device provided by the present application;

[0027] Figure 4 A Figure 3 A sectional view along the direction of A-A in FIG. 1;

[0028] Figure 5 A two-view structural schematic diagram of a partial structure of one of the embodiments of the knee joint angle measuring device provided by the present application;

[0029] Figure 6 A two-view sectional structural schematic diagram of a partial structure of one of the embodiments of the knee joint angle measuring device provided by the present application.

[0030] Icon:

[0031] 100 - first fixing member; 102 - first air bag; 104 - rotating shaft; 106 - coil spring; 108 - first adsorption disc; 120 - second fixing member; 122 - mounting through hole; 124 - second air bag; 126 - second adsorption disc; 130 - third fixing member; 140 - measuring disc; 150 - connecting member;

[0032] 200 - first straight line; 300 - second straight line. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0034] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the products of the present application are used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated devices or elements must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0036] The embodiments of the present application provide a knee joint angle measuring device, as shown in Figure 1 and Figure 2 , which comprises a connecting piece 150, a first fixing piece 100, a second fixing piece 120 and a third fixing piece 130.

[0037] As shown in Figure 1 , the first fixing piece 100 and the second fixing piece 120 are fixed on the patient's leg along a first straight line 200, which is parallel to the axial direction of the patient's femur. Exemplarily, as shown in Figure 1 , the first fixing piece 100 is fixed at the greater trochanter of the patient's femur, and the second fixing piece 120 is fixed at the lateral epicondyle of the patient's knee joint.

[0038] As shown in Figure 1 , the second fixing piece 120 and the third fixing piece 130 are fixed on the patient's leg along a second straight line 300; exemplarily, the third fixing piece 130 is fixed at the patient's lateral malleolus.

[0039] Exemplarily, the first fixing piece 100, the second fixing piece 120 and the third fixing piece 130 are fixed on the skin of the patient's leg by adsorption, adhesion or clamping.

[0040] As shown in Figure 1 The second straight line 300 is parallel to the axial direction of the tibia of the patient and intersects the first straight line 200 at the knee joint of the patient, and the included angle between the first straight line 200 and the second straight line 300 is the included angle between the femur and the tibia of the patient.

[0041] Because different patients have different leg sizes, the knee joint angle measuring device in the prior art is not very adaptable, the measurement accuracy varies from person to person, the average measurement accuracy is insufficient, and the flexion and extension angles of the knee joint of the patient cannot be accurately reflected.

[0042] In the present application, the connecting piece 150 is arranged on the second fixing piece 120, and one end of the connecting piece 150 is connected to the first fixing piece 100, and the other end of the connecting piece 150 is connected to the third fixing piece 130.

[0043] The length of one end of the connecting piece 150 is adjustable so that one end of the connecting piece 150 remains straight and parallel to the first straight line 200. During use, when the patient is tall, the femur will be longer, and the length of one end of the connecting piece 150 can be increased, and when the patient is short, the femur will be shorter, and the length of one end of the connecting piece 150 can be reduced. By adjusting the length of one end of the connecting piece 150, one end of the connecting piece 150 remains straight; during measurement, the extension direction of one end of the connecting piece 150 can be regarded as the first straight line 200, and then one end of the connecting piece 150 is used as a reference to determine the axial direction of the femur of the patient, thereby improving the measurement accuracy.

[0044] In one embodiment, the length of the other end of the connecting piece 150 is adjustable so that the other end of the connecting piece 150 remains straight and parallel to the second straight line 300. During use, when the patient is tall, the tibia will be longer, and the length of the other end of the connecting piece 150 can be increased, and when the patient is short, the tibia will be shorter, and the length of the other end of the connecting piece 150 can be reduced. By adjusting the length of the other end of the connecting piece 150, the other end of the connecting piece 150 remains straight; during measurement, the extension direction of the other end of the connecting piece 150 can be regarded as the second straight line 300, and then the other end of the connecting piece 150 is used as a reference to determine the axial direction of the tibia of the patient, thereby improving the measurement accuracy.

[0045] As shown in Figure 1 The included angle between one end and the other end of the connecting piece 150 is the included angle between the femur and the tibia of the patient.

[0046] In the present application, one end of the connecting piece 150 is used as a reference datum for the axial line of the femur of the patient, and the other end of the connecting piece 150 is used as a reference datum for the axial line of the tibia of the patient, which is not affected by the body type of the patient, thereby improving the measurement accuracy and providing accurate reference data for the treatment plan of the doctor.

[0047] like Figure 3 to Figure 5 As shown, in one embodiment, the second fixing member 120 is provided with a mounting through hole 122. The connector 150 passes through the mounting through hole 122 of the second fixing member 120.

[0048] The junction of one end and the other end of the connector 150 is located within the mounting through hole 122. The inner wall of the mounting through hole 122 pushes the connector 150, causing the junction of one end and the other end of the connector 150 to bend, thereby forming a shape such that one end and the other end of the connector 150 are... Figure 1 and Figure 2 The state shown has an included angle.

[0049] In one embodiment, the mounting through hole 122 of the connector 150 and the second fixing member 120 are clearance-fitted, allowing the connector 150 to slide in the mounting through hole 122 to adjust the length of one end of the connector 150 and the other end.

[0050] During use, one end of the connector 150 can slide from the mounting through hole 122 to the other end of the connector 150, or the other end of the connector 150 can slide from the mounting through hole 122 to one end of the connector 150.

[0051] It should be understood that the portion of connector 150 within the mounting through-hole 122 is considered the boundary between one end and the other. As connector 150 slides within the mounting through-hole 122, the lengths of one end and the other end of connector 150 change. For example, if connector 150 slides within the mounting through-hole 122 in the direction of one end of connector 150, the length of the other end of connector 150 will decrease; conversely, if connector 150 slides within the mounting through-hole 122 in the direction of the other end of connector 150, the length of one end of connector 150 will decrease.

[0052] The connector 150 and the mounting through hole 122 of the second fixing member 120 are fitted with a clearance fit, allowing the connector 150 to slide freely within the mounting through hole 122. This design provides great adjustment flexibility, allowing the user to adjust the length of one end of the connector 150 and the other end as needed.

[0053] In this embodiment, the connector 150 is a rigid connecting rope that can be stretched; in another embodiment, the connector 150 is a flexible connecting rope whose length can be stretched. When encountering patients with longer leg sizes, stretching the connector 150 can further extend the length of the connector 150, thereby improving adaptability.

[0054] In this application, when the connector 150 is a flexible connecting rope, the connector 150 can be fixedly installed in the mounting through hole 122 or slidably installed in the mounting through hole 122.

[0055] In one embodiment, the connector 150 is a flexible connecting rope, and the connector 150 and the mounting through hole 122 of the second fixing member 120 are clearance-fitted, so that the connector 150 slides against the inner wall of the mounting through hole 122, and the length of one end or the other end of the connector 150 is increased by moving the connector 150 in the mounting through hole 122.

[0056] Unlike the above embodiments where the connector 150 is slidably installed in the mounting through hole 122, in one embodiment, the connector 150 is a flexible connecting rope, and the connector 150 is fixedly installed in the mounting through hole 122 of the second fixing member 120. When it is necessary to adjust the length of the connector 150, it is only necessary to stretch the connector 150 to extend it.

[0057] For example, the connector 150 is interference-fitted with the mounting through hole 122, so the connector 150 is fixedly disposed within the mounting through hole 122 of the second fastener 120. However, in other embodiments, the connector 150 is fixedly connected to the mounting through hole 122 of the second fastener 120 by means of snap-fit ​​or adhesive.

[0058] like Figure 6 As shown, in one embodiment, a rotating shaft 104 for winding and storing the connector 150 is provided on the first fixing member 100, and the rotating shaft 104 is rotatably configured and driven to be connected to a coil spring 106.

[0059] For example, the first fixation member 100 is fixed to the greater trochanter of the patient's femur by adsorption. The first fixation member 100 includes a first airbag 102, a first adsorption plate 108 connected to the first airbag 102, and a first adsorption channel provided on the first airbag 102. The first airbag 102 is connected to the first adsorption plate 108 through the first adsorption channel. When the first airbag 102 is pressed, the first adsorption plate 108 is attached to the greater trochanter of the patient's femur. When the first airbag 102 is released, the first airbag 102 rebounds, reducing the pressure at the first adsorption plate 108 to a negative pressure, thereby adsorbing the first adsorption plate 108 to the greater trochanter of the patient's femur.

[0060] A rotating shaft 104 is also rotatably installed at the first airbag 102. The rotating shaft 104 is a hollow shaft, and the hollow part of the rotating shaft 104 is coaxial with the first adsorption through hole, so that the airbag is connected to the first adsorption plate 108 through the first adsorption channel and the hollow part of the rotating shaft 104.

[0061] The coil spring 106 can absorb and release elastic potential energy. One end of the coil spring 106 is fixedly connected to the air bag, and the other end of the coil spring 106 is connected to the rotating shaft 104. Initially, one end of the connecting piece 150 is wound on the rotating shaft 104. During use, the connecting piece 150 is pulled out, and the connecting piece 150 drives the rotating shaft 104 to rotate forward. The forward rotation of the rotating shaft 104 drives the coil spring 106 to rotate and store energy. After use, the connecting piece 150 is released, and the coil spring 106 releases the stored energy to drive the rotating shaft 104 to rotate reversely. The reverse rotation of the rotating shaft 104 causes the connecting piece 150 to be wound on the rotating shaft 104, and the connecting piece 150 is recovered to the first fixing piece 100.

[0062] In one embodiment, the third fixing piece 130 is provided with the rotating shaft 104 for winding and accommodating the connecting piece 150. The rotating shaft 104 is rotatably arranged and drivenly connected with the coil spring 106. In this embodiment, the arrangement of the rotating shaft 104 and the air bag on the second fixing piece 120 is the same as that of the first fixing piece 100 in the previous embodiment, and will not be described again in this embodiment.

[0063] As shown in Figure 1 to Figure 3 In one embodiment, the knee joint angle measuring device further comprises a measuring disc 140 arranged on the second fixing piece 120 coaxially with the second fixing piece 120, and provided with an angle scale. Figure 1 As shown in

[0064] By connecting one end of the connecting piece 150 to the first fixing piece 100 (which is likely to be connected to the femur) and the other end of the connecting piece 150 to the third fixing piece 130 (which is likely to be connected to the tibia), and corresponding to two scales on the measuring disc 140, the mechanical structure can directly measure the angle between the femur and the tibia of the patient, i.e. the angle of the knee joint. This design makes the measurement process intuitive and easy to understand.

[0065] The measuring disc 140 is arranged coaxially with the second fixing piece 120, which ensures that when the connecting piece 150 is sliding or adjusted, the change of the scales of the two ends of the connecting piece 150 on the measuring disc 140 can accurately reflect the change of the angle of the knee joint.

[0066] In one embodiment, the measuring disc 140 is rotatably connected with the second fixing piece 120.

[0067] In the present application, the measurement disc 140 is rotationally connected with the second fixing member 120, so that the measurement disc 140 can flexibly rotate the zero scale line to one end or the other end of the connecting member 150. This design greatly simplifies the measurement steps, because the user no longer needs to manually adjust the position or angle of the measurement disc 140 to align the scale, thereby improving measurement efficiency.

[0068] In the present application, by rotating the measurement disc 140, the user can easily align the zero scale line to one end of the connecting member 150, and then read the scale value on the other end of the measurement disc 140, thereby obtaining the angle of the knee joint. This design makes the reading process more intuitive and simple, reducing reading errors caused by the angle of view or unclear scales.

[0069] In the present application, the rotatable measurement disc 140 is not only suitable for patients in a sitting position, but also suitable for patients in a lying position. This design makes the mechanical structure applicable to patients in different body positions, thereby improving its scope of application and practicality.

[0070] In the present application, since the measurement disc 140 can be rotated, the user can easily adjust its angle as needed, making the measurement process more comfortable and convenient. This design not only improves measurement efficiency, but also enhances user experience.

[0071] In the present application, by rotating the measurement disc 140 to align the scale, errors caused by manually adjusting the position of the measurement disc 140 can be reduced. This design makes the measurement result more accurate and reliable, providing stronger support for medical diagnosis and treatment.

[0072] In one embodiment, the first fixing member 100 is adhesively fixed to the patient's leg. Illustratively, the first fixing member 100 is provided with a first air bag 102 and a first suction disc 108, the first suction disc 108 is coated with adhesive, which can make the first suction disc 108 stick to the skin of the patient's leg, at the same time, the first suction disc 108 can also be adsorbed on the skin of the patient's leg through negative pressure, increasing the strength of the fixed connection.

[0073] In one embodiment, the second fixing member 120 is adhesively fixed to the patient's leg. Illustratively, the second fixing member 120 is provided with a second air bag 124 and a second suction disc 126, the second suction disc 126 is coated with adhesive, which can make the second suction disc 126 stick to the skin of the patient's leg, at the same time, the second suction disc 126 can also be adsorbed on the skin of the patient's leg through negative pressure, increasing the strength of the fixed connection.

[0074] In one embodiment, the third fixing member 130 is fixedly bonded to the leg of the patient. Exemplarily, the third fixing member 130 is provided with a third air bag and a third suction disc, the third suction disc is bonded with adhesive, and the third suction disc can be adhered to the skin of the leg of the patient. Meanwhile, the third suction disc can also be adsorbed to the skin of the leg of the patient through negative pressure, so as to increase the strength of the fixed connection.

[0075] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0076] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A knee joint angle measuring device, characterized in that, include: The first fixation member (100), the second fixation member (120), and the third fixation member (130) are fixed to the patient's leg along a first straight line (200), which is parallel to the axis of the patient's femur. The second fixation member (120) and the third fixation member (130) are fixed to the patient's leg along a second straight line (300), which is parallel to the axis of the patient's tibia and intersects the first straight line (200) at the patient's knee joint. The angle between the first straight line (200) and the second straight line (300) is the angle between the patient's femur and tibia. A connector (150) is disposed on the second fixing member (120), and one end of the connector (150) is connected to the first fixing member (100), and the other end of the connector (150) is connected to the third fixing member (130). The length of one end of the connector (150) is adjustable so that one end of the connector (150) remains straight and parallel to the first straight line (200), and / or the length of the other end of the connector (150) is adjustable so that the other end of the connector (150) remains straight and parallel to the second straight line (300); The angle between one end and the other end of the connector (150) is the angle between the patient's femur and tibia.

2. The knee goniometer according to claim 1, wherein The second fixing member (120) is provided with a mounting through hole (122), and the connecting member (150) passes through the mounting through hole (122) of the second fixing member (120).

3. The knee goniometer according to claim 2, wherein The mounting through hole (122) of the connector (150) and the second fixing member (120) are clearance-fitted, so that the connector (150) can slide in the mounting through hole (122).

4. The knee goniometer of claim 2, wherein, The connector (150) is a flexible connecting rope whose length can be extended or retracted.

5. The knee joint angle measuring device according to claim 4, characterized in that, The connector (150) is fixedly disposed in the mounting through hole (122) of the second fixing member (120); Alternatively, the mounting through hole (122) of the connector (150) and the second fixing member (120) may be clearance-fitted.

6. The knee joint angle measuring device according to claim 1, characterized in that, The first fixing member (100) and / or the third fixing member (130) are provided with a rotating shaft (104) for winding and receiving the connector (150), and the rotating shaft (104) is rotatably connected to a coil spring (106).

7. The knee joint angle measuring device according to claim 1, characterized in that, Also includes: A measuring disk (140) is disposed on the second fixing member (120) and is coaxial with the second fixing member (120). An angle scale is provided on the measuring disk (140).

8. The knee joint angle measuring device according to claim 7, characterized in that, The measuring disc (140) is rotatably connected to the second fixing member (120).

9. The knee joint angle measuring device according to claim 1, characterized in that, The first fastener (100), the second fastener (120) and / or the third fastener (130) are attached to the patient's leg.

10. The knee joint angle measuring device according to claim 1, characterized in that, The first fastener (100), the second fastener (120) and / or the third fastener (130) are bonded and fixed to the patient's leg.

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