Support for knee joint operation

Abstract

The utility model discloses a support for knee joint surgery. The support comprises a base. The height adjusting mechanism is arranged at the center of the upper surface of the base and comprises a screw rod for adjusting the supporting height of the knee joint; the adjusting and positioning mechanism is located on the outer side of the height adjusting mechanism, comprises a movable block and is used for adjusting and positioning the supporting angle of the knee joint; according to the knee joint supporting device, the knee joint of a patient can be stably supported, the height and the bending angle of the knee joint can be conveniently adjusted and positioned according to operation requirements, the labor intensity and the workload of medical staff are reduced, operation is convenient and fast, and the operation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a bracket for knee joint surgery. Background Art

[0002] At present, in orthopedic surgery on the lower limb knee joint, the knee joint needs to be flexed to different angles during the surgery, and the surgery needs to be performed while maintaining a certain angle. For example, when the distal femoral fracture is treated with reverse intramedullary nailing, the patient is in a supine position, and the knee joint usually needs to be flexed to 30-50 degrees. This can avoid the obstruction of the patella, accurately open the distal end of the femoral condyle and prevent intramedullary nailing. However, people of different heights have different lower limb lengths, so the flexion angle and height are different. What kind of auxiliary device to use to achieve fixed angle support and maintain the stability of the operation has become a problem that needs to be solved.

[0003] For example, a special stent for knee surgery disclosed in a Chinese patent document (publication number: CN208626108U) can temporarily adjust the required knee flexion angle and height according to the situation during the operation, and the angle can be kept unchanged after adjustment. The angle adjustment of the stent is flexible and changeable, and the adjustable angle range is large. The wings on both sides of the cushion also solve the problem of stability when the knee is in a flexed state.

[0004] However, when adjusting the angle, medical staff need to lift one end of the entire sliding frame rod to disengage it from the fixed tooth. At this time, the entire leg weight of the patient is on the sliding frame rod, so the adjustment is labor-intensive, and the sliding frame rod is lifted to a large extent, which can easily cause secondary injuries to the patient. In addition, the height and frame size of patients are different, and the cushion cannot adjust the support height according to different patients. Utility Model Content

[0005] The utility model aims to provide a support for knee joint surgery, which solves the problem that the current knee joint surgery requires manual auxiliary support, which is labor-intensive and it is difficult to adjust the bending angle in real time according to the needs of the surgery when using objects for support.

[0006] The utility model solves the above-mentioned technical problems through the following technical solutions:

[0007] Base;

[0008] The height adjustment mechanism is arranged at the center of the upper surface of the base, and includes a screw rod for adjusting the height of the knee joint support;

[0009] The adjusting and positioning mechanism is located outside the height adjusting mechanism and includes a movable block for adjusting and positioning the supporting angle of the knee joint.

[0010] Preferably, the outer surface of one end of the screw is installed at the center of the upper surface of the base through a bearing, a driving handwheel is fixedly sleeved on the outer surface of the screw, a threaded sleeve is threadedly connected to the outer surface of the screw, and the height adjustment mechanism also includes a guide assembly.

[0011] Preferably, the guide assembly comprises a positioning block and a guide rod, one end of the two positioning blocks are respectively fixedly connected to the two side surfaces of the threaded sleeve, and the guide rod is movably sleeved with the inner wall of the positioning block.

[0012] Preferably, one end of the two guide rods is fixedly connected to the upper surface of the base, and the height adjustment mechanism also includes a support assembly, which includes a support block fixed to the upper end of the threaded sleeve and an arc-shaped support pad fixed above the support block.

[0013] Preferably, symmetrically distributed mounting grooves are provided on both side surfaces of the support block, the inner wall of the movable block is movably sleeved with the outer surface of the threaded sleeve, a bevel block is movably inserted into the front of the movable block, and one end of the bevel block is fixedly connected to a ring-shaped limit block.

[0014] Preferably, a contraction spring is fixedly connected to the back of the annular limit block, one end of the contraction spring is fixedly connected to the front of the movable block, a pull ring is fixedly connected to the front of the annular limit block, and a linear array of slots is provided on the front of the threaded sleeve.

[0015] Preferably, an inner wall of one of the slots is movably engaged with the other end of the inclined surface block, and the adjustment and positioning mechanism further includes an angle adjustment component.

[0016] Preferably, the angle adjustment assembly includes a first support and a swing rod hinged to the inner wall of the first support, and one side surface of two first supports are fixedly connected to two side surfaces of the movable block respectively.

[0017] Preferably, one end of the swing rod is hinged to a second support via a pin, one side surface of the second support is fixedly connected to an adjustment plate, an upper surface of the adjustment plate is fixedly connected to an arc-shaped placement block, and one end of the adjustment plate is hinged to the inner wall of the mounting groove via a pin.

[0018] Compared with the prior art, the beneficial effects of the utility model are: it realizes stable support for the patient's knee joint, and is convenient for adjusting and positioning the height and bending angle of the knee joint according to surgical needs, which not only reduces the labor intensity and workload of medical staff, but also is convenient to operate, avoids secondary injuries to patients, and reduces the difficulty of surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the mid-angle adjustment component;

[0021] Figure 3 for Figure 1 A schematic diagram of the structure of the mid-height adjustment mechanism;

[0022] Figure 4 for Figure 1 Schematic diagram of the structure of the middle adjustment and positioning mechanism.

[0023] The numbers in the figure represent:

[0024] Base;

[0025] Screw; 21-driving hand wheel; 22-threaded sleeve; 23-positioning block; 231-guide rod; 24-support block; 241-arc support pad; 25-mounting slot;

[0026] 3-movable block; 31-inclined clamping block; 32-annular limiting block; 33-contraction spring; 34-pull ring; 35-cage; 36-first support; 361-swing rod; 362-second support; 363-adjusting plate; 364-arc-shaped placement block. DETAILED DESCRIPTION

[0027] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0028] Embodiment 1

[0029] This embodiment provides a technical solution: a stent for knee joint surgery, such as Figure 1-3 Shown, including

[0030] Base 1;

[0031] The height adjustment mechanism is arranged at the center of the upper surface of the base 1, and includes a screw 2 for adjusting the height of the knee joint support;

[0032] The adjusting and positioning mechanism is located outside the height adjusting mechanism and includes a movable block 3 for adjusting and positioning the supporting angle of the knee joint.

[0033] This embodiment can achieve stable support for the patient's knee joint and facilitate adjustment and positioning of the knee joint height and bending angle according to surgical needs, which not only reduces the labor intensity and workload of medical staff, but also is easy to operate, avoids secondary injuries to patients, and reduces the difficulty of surgery.

[0034] Embodiment 2

[0035] This embodiment is further optimized on the basis of the first embodiment, and the same parts as the above technical solution will not be repeated here. Figure 3 As shown, in order to better realize the utility model, the following setting mode is particularly adopted: in this embodiment, the outer surface of one end of the screw rod 2 is installed with the upper surface of the base 1 through a bearing, the outer surface of the screw rod 2 is fixedly sleeved with a driving hand wheel 21, the outer surface of the screw rod 2 is threadedly connected with a threaded sleeve 22, and the height adjustment mechanism also includes a guide assembly;

[0036] The guide assembly includes a positioning block 23 and a guide rod 231. One end of the two positioning blocks 23 is fixedly connected to the two side surfaces of the threaded sleeve 22 respectively, and the guide rod 231 is movably sleeved with the inner wall of the positioning block 23.

[0037] One end of the two guide rods 231 is fixedly connected to the upper surface of the base 1;

[0038] When adjusting the knee joint height support, the driving hand wheel 21 is used to drive the screw 2 to rotate clockwise or counterclockwise. The rotation of the screw 2 drives the threaded sleeve 22 to achieve lifting and movement adjustment through the cooperation of the guide assembly. The guide assembly guides the lifting and movement of the positioning block 23 through the guide rod 231, thereby limiting the rotation of the threaded sleeve 22 through the positioning block 23, thereby achieving stable adjustment of the knee joint height.

[0039] Embodiment 3

[0040] This embodiment is further optimized on the basis of the first embodiment, and the same parts as the above technical solution will not be repeated here. Figure 2-3 As shown, in order to better realize the present utility model, the following configuration is particularly adopted: In this embodiment, the height adjustment mechanism further includes a support assembly, which includes a support block 24 fixed to the upper end of the threaded sleeve 22 and an arc-shaped support pad 241 fixed above the support block 24;

[0041] The two side surfaces of the support block 24 are provided with symmetrically distributed mounting grooves 25;

[0042] In order to achieve the compatibility between the support block 24 and the patient's knee joint, the curved support pad 241 is used to provide arc support for the bending part of the knee joint to improve the patient's comfort. The lifting and lowering movement of the threaded sleeve 22 drives the knee joint placed on the arc support pad 241 to adjust its height through the support block 24.

[0043] Embodiment 4

[0044] This embodiment is further optimized on the basis of the first embodiment, and the same parts as the above technical solution will not be repeated here. Figure 1-4As shown, in order to better realize the utility model, the following setting mode is particularly adopted: in this embodiment, the inner wall of the movable block 3 is movably sleeved with the outer surface of the threaded sleeve 22, and the front of the movable block 3 is movably plugged with a bevel block 31, and one end of the bevel block 31 is fixedly connected with an annular limit block 32;

[0045] A contraction spring 33 is fixedly connected to the back of the annular limit block 32, one end of the contraction spring 33 is fixedly connected to the front of the movable block 3, a pull ring 34 is fixedly connected to the front of the annular limit block 32, and a linear array of slots 35 are provided on the front of the threaded sleeve 22, wherein the inner wall of one of the slots 35 is movably connected to the other end of the inclined surface block 31, and the adjustment and positioning mechanism also includes an angle adjustment component;

[0046] The angle adjustment assembly includes a first support 36 and a swing rod 361 hinged to the inner wall of the first support 36. One side surfaces of the two first supports 36 are fixedly connected to the two side surfaces of the movable block 3 respectively. One end of the swing rod 361 is hinged to the second support 362 through a pin shaft. One side surface of the second support 362 is fixedly connected to an adjustment plate 363. The upper surface of the adjustment plate 363 is fixedly connected to an arc-shaped placement block 364. One end of the adjustment plate 363 is hinged to the inner wall of the mounting groove 25 through a pin shaft.

[0047] In order to adjust the bending angle of the patient's knee joint according to surgical needs, the threaded sleeve 22 guides the movable block 3 so that the movable block 3 can be stably lifted and lowered outside the threaded sleeve 22. The lifting and lowering movement of the movable block 3 can adjust the bending angle of the knee joint through the angle adjustment component.

[0048] The angle adjustment assembly, through the upward movement of the movable block 3, drives the adjustment plate 363 connected to the second support 362 to swing through the first support 36 and the swing rod 361 hinged to the inner wall of the first support 36. The adjustment plate 363 is positioned and swung in the installation groove 25 by one end thereof, so as to achieve bending adjustment of the supported knee joint. The arc-shaped placement block 364 is used to place the patient's legs, and there is a Velcro for fixing the legs on the upper part thereof, which is not shown in the figure because it belongs to the mature existing technology;

[0049] When the movable block 3 moves upward, the inclined surface of the inclined surface block 31 will be squeezed with the inner top wall of the slot 35, so that the inclined surface block 31 is squeezed and contracted, thereby cooperating with the annular limit block 32 to drive the contraction spring 33 to stretch. When the movable block 3 moves to a suitable height, the elastic force of the contraction spring 33 drives the inclined surface block 31 to reset through the annular limit block 32, so that it is inserted into the corresponding slot 35 for clamping and limiting.

[0050] When the movable block 3 needs to be lowered for adjustment, the pull ring 34 is used to facilitate the movement of the annular limit block 32. After the annular limit block 32 drives the inclined surface block 31 to disengage from the slot 35, the movable block 3 can be pulled down to make the adjustment plate 363 swing in the opposite direction to adjust the angle. When the appropriate angle is adjusted, the pull ring 34 is released. At this time, the elastic force of the contraction spring 33 drives the inclined surface block 31 to reset through the annular limit block 32, so that it is inserted into the corresponding slot 35 for clamping and limiting.

[0051] The above is only a preferred embodiment of the utility model, which is only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences can be made within the spirit and scope defined by the claims of the utility model, but they will all fall within the scope of protection of the utility model.

Claims

1. A stent for knee joint surgery, characterized in that: include Base (1); The height adjustment mechanism is arranged at the center of the upper surface of the base (1), and comprises a screw rod (2) for adjusting the height of the knee joint support; An adjustment and positioning mechanism, located outside the height adjustment mechanism, comprises a movable block (3) for adjusting and positioning the knee joint support angle; The outer surface of one end of the screw rod (2) is mounted on the center of the upper surface of the base (1) via a bearing, a driving hand wheel (21) is fixedly sleeved on the outer surface of the screw rod (2), a threaded sleeve (22) is threadedly connected to the outer surface of the screw rod (2), and the height adjustment mechanism further comprises a guide assembly; The guide assembly comprises a positioning block (23) and a guide rod (231), one end of each of the two positioning blocks (23) being fixedly connected to two side surfaces of the threaded sleeve (22), respectively, and the guide rod (231) being movably sleeved to the inner wall of the positioning block (23); One end of each of the two guide rods (231) is fixedly connected to the upper surface of the base (1); the height adjustment mechanism further comprises a support assembly, the support assembly comprising a support block (24) fixed to the upper end of the threaded sleeve (22) and an arc-shaped support pad (241) fixed above the support block (24); The surfaces of both sides of the support block (24) are provided with symmetrically distributed mounting grooves (25); the inner wall of the movable block (3) is movably sleeved with the outer surface of the threaded sleeve (22); a bevel clamping block (31) is movably inserted into the front surface of the movable block (3); and one end of the bevel clamping block (31) is fixedly connected to an annular limit block (32); A contraction spring (33) is fixedly connected to the back of the annular limit block (32), one end of the contraction spring (33) is fixedly connected to the front of the movable block (3), a pull ring (34) is fixedly connected to the front of the annular limit block (32), and a linear array of slots (35) are provided on the front of the threaded sleeve (22); The inner wall of one of the clamping slots (35) is movably clamped with the other end of the inclined clamping block (31), and the adjustment and positioning mechanism further comprises an angle adjustment component; The angle adjustment assembly comprises a first support (36) and a swing rod (361) hinged to the inner wall of the first support (36), and one side surface of two first supports (36) are respectively fixedly connected to two side surfaces of the movable block (3); One end of the swing rod (361) is hinged to a second support (362) via a pin shaft, an adjustment plate (363) is fixedly connected to a side surface of the second support (362), an arc-shaped placement block (364) is fixedly connected to an upper surface of the adjustment plate (363), and one end of the adjustment plate (363) is hinged to the inner wall of the installation groove (25) via a pin shaft.

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