Precise evaluation device for stability of inner and outer sides of knee joint during load bearing
By designing a knee joint assessment device with a positioning rod and a dial, and measuring the angular angle between the medial and lateral sides of the knee joint while standing, the problem of the inability to accurately assess the medial and lateral stability of the knee joint under load in existing technologies is solved, thus achieving accurate assessment.
Patent Information
- Application Number
- CN202422349234.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-09-26
AI Technical Summary
Current technology cannot accurately assess the medial and lateral stability of the knee joint when bearing weight, and there are errors in bedside physical examinations.
An assessment device comprising positioning rods, fixing clamps, and a scale dial was designed. The stability is assessed by measuring the angular angle between the medial and lateral sides of the knee joint when the patient is standing, and by using the difference in scale values on the two positioning rods.
It enables accurate assessment of the medial and lateral stability of the knee joint under weight-bearing while the patient is standing, avoiding errors associated with examinations conducted while the patient is lying down.
Smart Images
Figure CN223799765U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical equipment technical field especially is involved in a kind of precise evaluation device of medial-lateral stability when knee joint is under load. BACKGROUND
[0002] Knee joint is located between femur and tibia, mainly by two big bone ends of femur and tibia, patella and the posterior articular cartilage covered in femur and tibia end and patella is constituted, is connected by muscle, tendon, ligament and joint capsule package. Knee joint is the largest and most complex biomechanical joint of human body. It connects the longest bones of human body together, and has the largest joint cavity, the largest sesamoid bone (patella) and the largest joint capsule.
[0003] The physiological function of knee joint is mainly load-bearing function and movement function. Knee joint is the main load-bearing movement joint of human body, when human body is in standing position, it has the effect of supporting body weight without muscle contraction.
[0004] The movement characteristics of knee joint are determined by the shape of the bones constituting the joint and the guiding action of the ligaments. Mainly flexion and extension movement, with rotation movement in flexion position, and small range of passive movement of medial-lateral rotation.
[0005] Because knee joint has complex structure and important movement function, so medial-lateral stability when knee joint is under load is extremely important, currently, doctors usually use physical examination to evaluate the medial-lateral stability of knee joint when patient is in bed, which cannot accurately evaluate the medial-lateral stability of knee joint when patient is under load. UTILITY MODEL CONTENT
[0006] The utility model solves the technical problem of overcoming the defects of the prior art, and provides a precise evaluation device for medial-lateral stability of knee joint under load, which avoids the error caused by using physical examination to evaluate the medial-lateral stability of knee joint when patient is in bed, thereby accurately evaluating the medial-lateral stability of knee joint under load, and effectively solving the problems in the background art.
[0007] In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:
[0008] A precise evaluation device for medial-lateral stability of knee joint under load, comprising a positioning rod, the positioning rod has two, two positioning rods are sleeved with two fixed clamps, the inner end of the two positioning rods is rotatably connected, and a scale disc is installed at the intersection point of the inner end of the two positioning rods.
[0009] Further, the fixed clamp and the positioning rod are slidably connected.
[0010] Further, the ear seat is further included, the ear seat has two, two ear seats are correspondingly fixed at the inner end of two positioning rods, and the two ear seats are rotatably connected through the pin shaft.
[0011] Further, the dial is fixed at the end of the pin shaft, and the center line of the dial is arranged to coincide with the axis of the pin shaft.
[0012] Compared with the prior art, the knee joint weight-bearing inner and outer side stability precise evaluation device has the following advantages: one positioning rod corresponds to one scale on the dial, the other positioning rod corresponds to the other scale on the dial, and the maximum knee joint inner and outer side angular angle is obtained through the difference between the two scales, so that the error generated by using physical examination to evaluate when the patient is in bed is avoided, and the knee joint weight-bearing inner and outer side stability of the patient is precisely evaluated. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a three-dimensional structure schematic view of the utility model;
[0014] Figure 2 It is a three-dimensional bottom structure schematic view of the utility model;
[0015] Figure 3 It is Figure 2 A enlarged structure schematic view of the utility model.
[0016] In the drawing: 1-positioning rod, 2-fixed clamp, 3-dial, 4-ear seat, 5-pin shaft. DETAILED DESCRIPTION
[0017] The utility model can be explained in detail through the following examples, and the purpose of the utility model is to protect all technical improvements within the scope of the utility model.
[0018] Please refer to Figures 1-3The embodiment provides a technical scheme: a precise evaluation device for medial-lateral stability of knee joint under weight bearing, which comprises two positioning rods 1, two positioning rods 1 are sleeved with two fixed clamps 2, the inner ends of the two positioning rods 1 are rotationally connected, a scale disc 3 is installed at the intersection of the inner ends of the two positioning rods 1, the two fixed clamps 2 on one positioning rod 1 are used for fixing the thigh part of the affected limb of a patient, the two fixed clamps 2 on the other positioning rod 1 are used for fixing the lower leg part of the affected limb of the patient, the intersection part of the inner ends of the thigh-side positioning rod 1 and the lower leg-side positioning rod 1 is parallel to the gap between the tibia and the femur of the knee joint, the scale disc 3 is corrected when the patient stands, so that the initial angle formed by the two positioning rods 1 is 0 degrees, (at this time, the thigh-side positioning rod 1 and the lower leg-side positioning rod 1 are not necessarily parallel, the force line of the lower limbs of the patient is not correct, and it does not belong to the medial-lateral stability evaluation content), then the patient stands on one foot on the balance ball and stands for 20 seconds, the maximum medial-lateral angle of the knee joint is measured by the scale disc 3, so as to precisely evaluate the medial-lateral stability of the knee joint under weight bearing, one scale on the scale disc 3 corresponds to one positioning rod 1, and the other scale on the scale disc 3 corresponds to the other positioning rod 1, and the maximum medial-lateral angle of the knee joint is obtained through the difference between the two scales, which avoids the error generated by using physical examination to evaluate when the patient is in bed, and thus precisely evaluates the medial-lateral stability of the knee joint under weight bearing.
[0019] The fixed clamp 2 is slidably connected with the positioning rod 1, so that the position of the fixed clamp 2 on the positioning rod 1 can be adjusted, and thus the fixed position of the fixed clamp 2 can be adjusted.
[0020] Further comprising two ear seats 4, the two ear seats 4 are correspondingly fixed at the inner ends of the two positioning rods 1, the two ear seats 4 are rotationally connected through a pin shaft 5, the scale disc 3 is fixed at the end of the pin shaft 5, the center line of the scale disc 3 is coaxially arranged with the axis of the pin shaft 5, and the ear seats 4 at the ends of the two positioning rods 1 are relatively rotated through the pin shaft 5, so as to adapt to the leg condition of the affected limb of the patient.
[0021] The working principle of the precise evaluation device for medial-lateral stability of knee joint during weight bearing is as follows: two fixing clamps 2 on one positioning rod 1 are used for fixing the thigh part of the affected limb of the patient, two fixing clamps 2 on the other positioning rod 1 are used for fixing the calf part of the affected limb of the patient, the inner end part joint part of the thigh side and the calf side positioning rod 1 and the gap between the tibia and the femur of the knee joint are parallel, the dial 3 is corrected when the patient stands, so that the initial angle formed by the two positioning rods 1 is 0 degrees, (at this time, the thigh side and the calf side positioning rod 1 are not necessarily parallel, the force line of the lower limbs of some patients is not correct, and it does not belong to the medial-lateral stability evaluation content), then the patient stands on one foot on the balance ball, and the maximum medial-lateral angle of the knee joint is measured, so as to precisely evaluate the medial-lateral stability of the knee joint during weight bearing, one scale on the dial 3 corresponds to one positioning rod 1, and the other scale on the dial 3 corresponds to the other positioning rod 1, the maximum medial-lateral angle of the knee joint is obtained through the difference between the two scales, the ear seats 4 at the ends of the two positioning rods 1 are relatively rotated through the pin shaft 5, so as to adapt to the leg condition of the affected limb of the patient, the fixing clamps 2 are slidably connected with the positioning rods 1, so that the position of the fixing clamps 2 on the positioning rods 1 can be adjusted, and the fixing position of the fixing clamps 2 can be adjusted.
[0022] It is worth noting that the components disclosed in the above embodiments are all general standard components or components known by those skilled in the art, the structure and principle of which can be known by the technical personnel through a technical manual or through a conventional experimental method, the positioning rod 1 can be a metal rod, and the fixing clamp 2 can be a metal clamp.
[0023] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements, unless another definite limitation. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances, for example, the rotary connection can be rotary connection through bearing.
[0024] The part not described in the utility model is prior art, although the utility model is specifically shown and introduced in combination with the preferred implementation scheme, and the specific implementation of the technical scheme method and approach is many, the above-mentioned is only the preferred implementation mode of the utility model, but the skilled in the art should understand that various changes can be made to the utility model in form and detail within the spirit and scope of the utility model defined by the appended claims, and all are the protection scope of the utility model.
Claims
1. A device for precise evaluation of medial-lateral stability of knee joint under load, comprising a positioning rod (1), characterized in that: The positioning rod (1) has two, two positioning rods (1) are sleeved with two fixed clamps (2), the inner end of two positioning rods (1) is rotatably connected, the inner end of two positioning rods (1) is installed with a scale disc (3) at the intersection point. The fixed clamp (2) is slidably connected with the positioning rod (1). It also includes an ear seat (4), the ear seat (4) has two, two ear seats (4) are correspondingly fixed on the inner end of two positioning rods (1), two ear seats (4) are rotatably connected by a pin shaft (5).
2. The device for precise assessment of medial-lateral stability of knee joint during weight-bearing according to claim 1, characterized in that: The scale disc (3) is fixed on the end of the pin shaft (5), and the center line of the scale disc (3) is coaxially arranged with the axis of the pin shaft (5).