Auxiliary measuring device for biomechanical characteristics of knee joint ligament

Abstract

The utility model provides an auxiliary measuring device for knee joint ligament biomechanical characteristics, which comprises a base, a plurality of first clamps are arranged on the base, every two first clamps in each group are opposite to each other, each first clamp comprises a vertical support rod and a support plate, the vertical support rod is connected with the base, and the support plate is connected with the base. First through holes are formed in the supporting plates, and each transverse supporting rod penetrates through the two through holes and is arranged on the two supporting plates. The device further comprises a second clamp, and the second clamp is connected with a driving device. According to the utility model, the thighbone and the tibia can be placed in different multi-angle positions, so as to simulate a drawer or traction experiment that a knee joint ligament is in different multi-angle positions, and parameters such as elongation and bearable load of the ligament between the tibia and the thighbone can be measured in cooperation with computer software; therefore, the mechanical influence of different ligament operations on the knee joint can be analyzed.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to an auxiliary measuring device for biomechanical properties of knee joint ligaments. Background Art

[0002] There are many methods for fixation of avulsion fractures of knee ligaments, such as direct antegrade screw fixation, retrograde screw fixation, direct suture cerclage, etc. In order to evaluate the effects of different fixation methods on ligaments, most of the current devices use the parallel stretching method of the femur and tibia to measure various parameters such as ligament elongation and load bearing. However, the parameters obtained by this measurement method are not completely accurate, and are only the measurement results of one angle of the knee joint. Therefore, how to design an auxiliary measurement device for the biomechanical properties of knee ligaments that can solve the above-mentioned defects is an urgent problem to be solved. Summary of the invention

[0003] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0004] An auxiliary measurement device for the biomechanical properties of knee ligaments, comprising a movable base, on which are disposed a plurality of first clamps for fixing the tibia, wherein the two first clamps in each group are opposed to each other, and each of the first clamps comprises a vertical vertical support rod connected to the base, and a support plate disposed on the vertical support rod and capable of moving up and down along the vertical support rod, wherein the support plate is provided with a first through hole for a transverse support rod to pass through, and each of the transverse support rods passes through two of the through holes and is disposed on the two support plates; and further comprising a second clamp disposed above the base for clamping the femur, wherein the second clamp is connected to a driving device for driving the second clamp to move up and down.

[0005] Preferably, the second clamp comprises two clamping plates and two screw rods respectively connecting the two clamping plates, the screw rods are arranged on a fixing frame and are threadedly connected to the fixing frame, and a handle for adjustment is arranged at the end of each screw rod.

[0006] Preferably, second through holes are formed on both sides of the fixing frame, and movable guide rods capable of passing through the second through holes are provided at the second through holes, and the guide rods are connected to the clamping plates.

[0007] Preferably, a trough platform is provided below the base, the trough platform is provided with a slide groove, and a slider movable in the slide groove is provided at the bottom of the base.

[0008] Preferably, the groove table is provided with a scale for measuring the moving distance.

[0009] Preferably, the bottom of the vertical support rod is provided with a thread, the base is provided with a plurality of threaded holes corresponding to the vertical support rod, and the vertical support rod is threadedly connected to the base.

[0010] Preferably, a bolt hole is provided at the bottom of the vertical support rod, a step hole is provided at the base, a hexagonal hole is provided below the step hole and connected to the hexagonal hole, and a hexagonal bolt passes through the hexagonal hole and the step hole respectively and is threadedly connected to the vertical support rod.

[0011] The beneficial effects of the utility model are as follows: the utility model can use the first clamp to fix the tibia, and by changing the height of each support plate, the tibia on the horizontal support rod can be in a multi-angle state, and the tibia can be placed and tested at multiple angles, and the ligament can also be placed and tested in and out of the eversion; the femur is fixed in a vertical direction by the second clamp, and the second clamp is driven up and down continuously by the driving device to facilitate the measurement of the elongation of the ligament; the position of the base is adjusted by the slot table to achieve vertical or angled testing. The utility model can make the femur and tibia present multiple angles to simulate the knee joint in different positions, to simulate the multi-angle drawer or traction experiment of the knee joint, and then cooperate with computer software to measure the elongation and load-bearing parameters of the ligament between the tibia and femur, so as to analyze the mechanical effects of different ligament surgeries on the knee joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a side structural schematic diagram of the first clamp, base and slot table of the utility model;

[0014] Figure 3 yes Figure 2 A schematic diagram of a top view structure;

[0015] Figure 4 It is a structural schematic diagram of one embodiment of the connection between the neutral support rod and the base of the utility model;

[0016] Figure 5 It is a structural schematic diagram of one embodiment of the connection between the neutral support rod and the base of the utility model;

[0017] Among them: base 10, slider 101, threaded hole 102, step hole 103, hexagonal hole 104, first clamp 12, vertical support rod 121, support plate 122, horizontal support rod 123, first through hole 124, drive device 14, second clamp 16, clamp plate 161, screw 162, fixing frame 163, second through hole 164, guide rod 165, handle 166, slot table 18, slide slot 181, hexagonal bolt 20. DETAILED DESCRIPTION

[0018] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0019] In the description of the present invention, it should be noted that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0020] like Figures 1 to 5 As shown, an auxiliary measurement device for the biomechanical properties of knee joint ligaments includes a movable base 10, on which a plurality of first clamps are arranged, and two first clamps of each group are arranged opposite to each other to fix the tibia. Each first clamp 12 includes a vertical support rod 121 connected to the base 10, and a support plate 122 arranged on the vertical support rod 121, and the support plate 122 can move up and down along the vertical support rod 121 to adjust its position. The support plate 122 is provided with a first through hole 124 for a transverse support rod 123 to pass through. Each transverse support rod 123 is arranged on two support plates 122 through two through holes 124 respectively. When the utility model is in use, each transverse support rod 123 passes through the first through hole 124 of one of the support plates 122 in turn, then passes through the tibia, and then passes through the first through hole 124 of the other support plate 122, and the tibia is arranged on the first clamp 12, so as to measure the elongation of the ligament. Among them, by adjusting the height of the support plates 122 on the left and right sides of the tibia, the tibia can be placed and tested at multiple angles; by adjusting the height of the front and back positions of the tibia, the ligament can be placed and tested in an inside-out manner.

[0021] The utility model also includes a second clamp 16 arranged above the base 10, and the second clamp 16 is used to clamp the femur. Among them, the second clamp 16 includes two clamps 161 and two screws 162 respectively connected to the two clamps 161, and the screws 162 are arranged on the fixing frame 163 and are threadedly connected to the fixing frame 163. A handle 166 is provided at the end of each screw 162, and the screw 162 can be rotated by the handle 166 to control the tightness of the clamping of the two clamps 161 when in use. Further, a second through hole 164 is opened on both sides of the fixing frame 163, and a movable guide rod 165 that can pass through the second through hole 164 is provided at the second through hole 164, and the guide rod 165 is connected to the clamp 161 to guide the adjustment of the clamp 161. When in use, the second clamp 16 can be suspended by other connecting devices such as a crossbeam, and the second clamp 16 clamps the femur so that the femur is in a vertical direction. A driving device 14 such as a motor is provided above the second fixture 16 to drive the second fixture 16 to move up and down, so as to move the femur up and down, so as to facilitate the measurement of the ligament between the femur and the tibia.

[0022] Furthermore, a slot platform 18 is provided below the base 10, and a scale is provided on the slot platform 18. The slot platform 18 is provided with a slide groove 181. A slider 101 that can move in the slide groove 181 is provided at the bottom of the base 10. When in use, the base 10 is set on the slot platform 18, and the base moves on the slot platform 18 through the slide groove 181 and the slider 101, and vertical or angled tests (such as: medial and lateral collateral ligaments, prepatellar ligament, etc.) can be achieved. The scale on the slot platform 18 can be used to know the moving distance and position of the base 10 on the slot platform.

[0023] In the present invention, one embodiment of the connection between the vertical support rod 121 and the base 10 is as follows: a thread is provided on the bottom surface of the vertical support rod 121, a plurality of threaded holes 102 corresponding to the vertical support rod 121 are provided on the base 10, and the vertical support rod 121 is threadedly connected to the base 10.

[0024] In the present invention, another embodiment of the connection between the vertical support rod 121 and the base 10 is: a bolt hole is opened at the bottom of the vertical support rod 121, and the base 10 is provided with a step hole 103. A hexagonal hole 104 is provided below the step hole 103 and is connected to the hexagonal hole 104. The hexagonal bolt 20 passes through the hexagonal hole 104 and the step hole 103 respectively and is threadedly connected to the bolt hole of the vertical support rod 121.

[0025] When the utility model is in use, the first clamp 12 can be used to fix the tibia, and by changing the height of each support plate 122 on the vertical support rod 121, the tibia on the horizontal support rod 123 can be in a multi-angle state, and the tibia can be placed and tested at multiple angles, and the ligament can also be placed and tested in and out of the inside and outside. The second clamp 16 is used to fix the femur in a vertical direction, and the second clamp 16 is driven by the driving device 14 to continuously move up and down to facilitate the measurement of the elongation of the ligament. The position of the base 10 is adjusted by the groove table 18 to achieve vertical or angled testing. The utility model can make the femur and tibia present multiple angles to simulate the knee joint in different positions, to simulate the multi-angle drawer or traction experiment of the knee joint, and then cooperate with computer software to measure the elongation of the ligament between the tibia and the femur and other parameters, so as to analyze the results of the effects of different ligament surgeries on the ligament.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An auxiliary measurement device for biomechanical properties of knee ligaments, comprising a movable base, characterized in that: The base is provided with a plurality of first clamps for fixing the tibia, and each group of two first clamps are opposite to each other, and each first clamp includes a vertical vertical support rod connected to the base, and a support plate arranged on the vertical support rod and capable of moving up and down along the vertical support rod, and a first through hole for a transverse support rod to pass through is provided on the support plate, and each of the transverse support rods passes through two of the through holes and is arranged on the two support plates; it also includes a second clamp arranged above the base for clamping the femur, and the second clamp is connected to a driving device for driving the second clamp to move up and down.

2. The auxiliary measurement device for biomechanical properties of knee joint ligaments according to claim 1, characterized in that: The second clamp includes two clamping plates and two screw rods respectively connecting the two clamping plates. The screw rods are arranged on a fixing frame and are threadedly connected to the fixing frame. The end of each screw rod is provided with a handle for adjustment.

3. The auxiliary measurement device for biomechanical properties of knee joint ligaments according to claim 2, characterized in that: Second through holes are provided on both sides of the fixing frame, and movable guide rods capable of passing through the second through holes are provided at the second through holes, and the guide rods are connected to the clamping plates.

4. The auxiliary measurement device for biomechanical properties of knee ligaments according to claim 1, characterized in that: A trough platform is arranged below the base, the trough platform is arranged with a slide groove, and a slider movable in the slide groove is arranged at the bottom of the base.

5. The auxiliary measurement device for biomechanical properties of knee joint ligaments according to claim 4, characterized in that: The groove platform is provided with a scale for measuring the moving distance.

6. The auxiliary measurement device for biomechanical properties of knee joint ligaments according to claim 1, characterized in that: The bottom of the vertical support rod is provided with a thread, the base is provided with a plurality of threaded holes corresponding to the vertical support rod, and the vertical support rod is threadedly connected with the base.

7. The auxiliary measurement device for biomechanical properties of knee ligaments according to claim 1, characterized in that: A bolt hole is provided at the bottom of the vertical support rod, a step hole is provided at the base, a hexagonal hole is provided below the step hole and is connected to the hexagonal hole, and a hexagonal bolt passes through the hexagonal hole and the step hole respectively and is threadedly connected to the vertical support rod.

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