An auxiliary fixation brace for preoperative imaging evaluation of unicompartmental knee replacement

Abstract

The present invention provides an auxiliary fixation brace for preoperative radiological evaluation of unicompartmental replacement, comprising a lateral limiter, a fixed connection member, a pressing installation member and a joint driving member; the lateral limiters are arranged in pairs, and have a first side plate and a second side plate connected together, the two side plates are respectively placed on both sides of the femur and the tibia of the patient's leg, and the patient's leg is kept at a certain angle; there are two fixed connections, which are respectively connected to the two first side plates or the two second side plates, so that the two first side plates or the two second side plates remain parallel to each other; there are two pairs of pressing installation members, which are respectively installed on the two first side plates and the two second side plates; there is at least one joint driving member, which is installed at the position where the first side plate and the second side plate are connected; the auxiliary fixation brace of the present invention can push the patient's knee joint to maintain inversion or eversion, and perform X-ray shooting, and the doctor no longer needs to manually hold it, and the doctor does not need to be exposed to the radiation environment, so it is safer.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary instruments, and in particular to an auxiliary fixation brace used for preoperative imaging evaluation of unicompartmental replacement. Background Art

[0002] Unicompartmental knee arthroplasty is a treatment method for the medial and lateral condyles of the knee joint between osteotomy and total knee replacement. That is, when one of the three compartments of the knee joint, the medial compartment, the lateral compartment and the patellar compartment, is diseased, the diseased compartment is replaced. Compared with osteotomy, unicompartmental knee arthroplasty has the characteristics of high success rate, fewer complications and faster recovery, and its long-term results are better than osteotomy. Compared with total knee replacement, it has the advantages of smaller surgery, preservation of the posterior cruciate ligament, more bone preservation, less bleeding and faster recovery.

[0003] Unicompartmental knee replacement has very strict requirements for the selection of indications. Before performing the surgery, the patient's leg needs to be X-rayed to observe the soft thigh in the joint compartment and select the indication. When taking the X-ray, the patient's femur needs to be fixed, and then the knee joint needs to be forcefully turned inward or outward to the stress position to expose the patient's cartilage joint space. Only in this way can the doctor observe the cartilage joint on the X-ray and choose the indication.

[0004] The common practice now is that doctors wear protective gloves, lead clothes, use arm strength to make the knee joint inward or outward, and then expose to radiation. However, this method will expose doctors to the radiation environment. Although they are protected, regular exposure will still have an adverse effect on the health of doctors.

[0005] Chinese patent document CN209847211U discloses a single-leg knee valgus stress position bracket, which constrains the thigh and pushes the calf to swing left and right to perform valgus on the knee joint; Chinese patent document CN209847212U discloses a double-leg knee valgus stress position bracket, which fixes two thighs and pushes two calves to swing inward or outward to perform valgus on the knee joint; Chinese patent document CN210019388U discloses a three-point bending thruster for obtaining knee joint X-ray images, which limits the thigh and calf from one side and the knee joint from the other side. The knee joint is pushed sideways to perform inside-out and outside-out rotation of the knee joint; Chinese patent document CN211325199U discloses a knee inside-out and outside-out rotation device, which has a retractable inside-out rotation part and outside-out rotation part between a thigh fixing part for fixing the thigh and a calf fixing part for fixing the calf, and achieves inside-out and outside-out rotation of the knee joint by extending the inside-out rotation part or extending the outside-out rotation part; Chinese patent document CN211325120U discloses a knee varus or valgus stress position X-ray photography-assisted fixation device, which achieves inside-out and outside-out rotation of the knee joint by providing a plurality of pads with fixed bayonet sockets and arranging them in a staggered manner. The various solutions provided in the above patent documents are basically operated on straight legs, that is, after straightening the legs, the thighs are fixed and the calves are pushed to swing relative to the thighs to achieve the inside-out and outside-out position of the knee joints; however, for determining whether unicompartmental knee replacement can be performed, the images obtained by performing inside-out and outside-out of the knee joints in the straight leg state cannot be used. Instead, it is necessary to first make the angle between the thigh and the calf about 150°-170°, and then perform inside-out and outside-out of the knee joint position, so that the three positions of the medial compartment, the lateral compartment and the patellar compartment can be clearly photographed to the greatest extent, so as to accurately determine whether unicompartmental knee replacement is suitable. The technical solutions disclosed in the above patent documents cannot achieve the above function. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the technical defects that the knee valgus and valgus devices in the prior art cannot perform stress-position internal and external valgus on the knee joint when the thigh and calf are flexed to a specific angle, and manual assistance may cause radiation damage to the human body, thereby providing a fixed brace that can perform stress-position internal and external valgus on the knee joint when the thigh and calf are flexed to a specific angle.

[0007] To this end, the present invention provides an auxiliary fixation brace device for preoperative imaging evaluation of unicompartmental replacement, comprising:

[0008] Side stoppers are arranged in pairs and have a first side plate and a second side plate whose ends are connected at a certain angle;

[0009] There are two fixed connecting members, one for fixedly connecting the two first side panels and keeping the two first side panels parallel; the other for fixedly connecting the two second side panels and keeping the two second side panels parallel;

[0010] There are two pairs of pressing mounting members, one pair is relatively mounted on the two first side plates, and the other pair is relatively mounted on the two second side plates;

[0011] At least one joint driving member is installed at the position where the first side plate and the second side plate are connected, and is suitable for pushing the knee joint inward or outward.

[0012] As a preferred solution, the fixed connection member includes:

[0013] There are two fixed connecting plates, which are respectively used to be fixedly connected to the two first side plates or the two second side plates;

[0014] There are two amplitude limiting plates, which can be quickly disassembled and installed in the middle of the head end and the middle of the tail end of the two fixed connecting plates respectively.

[0015] As a preferred solution, two limiting threaded holes are provided at one end of the amplitude limiting plate, and two fixed connection through holes are provided on the fixed connection plate opposite to the two limiting threaded holes, and two fixed connection bolts pass through the fixed connection through holes and are screwed to the limiting threaded holes;

[0016] The other end of the amplitude limiting plate is provided with two limiting through holes, and the fixed connecting plate opposite to the two limiting through holes is provided with two fixed plug-in bolts, which are pluggably installed inside the two limiting through holes; the outer diameter of the fixed plug-in bolt is smaller than the inner diameter of the limiting through hole;

[0017] At least one side through hole is also formed on the side surface of the amplitude limiting plate and crosses the two limiting through holes. The release bolt is pluggably installed inside the side through hole to limit the insertion depth of the fixed plug-in bolt.

[0018] As a preferred solution, the pressing mounting member comprises:

[0019] A pressing installation shaft, screwed on the first side plate or the second side plate;

[0020] A handle fixedly arranged at the outer end of the pressing mounting shaft;

[0021] A pressing ball, fixedly arranged on the inner end of the pressing mounting shaft;

[0022] A first pressing mounting plate is sleeved on the pressing mounting shaft through a pressing mounting hole, and the inner diameter of the pressing mounting hole is smaller than the diameter of the pressing ball;

[0023] The second pressing mounting plate is buckled with the first pressing mounting plate, and a space for accommodating the pressing ball is formed in the middle; a side of the second pressing mounting plate away from the first pressing mounting plate is provided with an arc-shaped pressing surface.

[0024] As a preferred solution, the pressing installation shaft passes through both the fixed connection piece and the lateral limiting piece.

[0025] As a preferred solution, the joint driving member includes:

[0026] A threaded shaft, screwed to a connection between the first side plate and the second side plate;

[0027] A driving handle, fixedly disposed at the outer end of the threaded shaft;

[0028] A square turntable, fixedly arranged at the inner end of the threaded shaft;

[0029] A first push plate, which is sleeved on the threaded shaft through a circular through hole arranged at the center, and is located between the driving handle and the square turntable;

[0030] The second push plate is buckled with the first push plate and has a circular inner cavity in the middle for the square turntable to rotate; the side of the second push plate away from the first push plate is a joint driving surface.

[0031] As a preferred solution, it further includes an extension plate, suitable for connecting with the first side plate or the second side plate;

[0032] The extension plate is provided with at least two first mounting through holes, the first side plate or the second side plate is provided with at least two second mounting through holes, and the extension plate is connected to the first side plate or the second side plate by mounting bolts installed through the first mounting through holes and the second mounting through holes.

[0033] As a preferred solution, the first side panel and the second side panel are rotatably connected via an angle control structure;

[0034] The angle control structure comprises:

[0035] A U-shaped structure is arranged at the end of the first side plate, and two opposite angle limiting circular rings are fixedly arranged on two opposite inner side surfaces, and the angle limiting circular rings have a plurality of continuously arranged sawtooth grooves and a connecting bottom groove connected with all the sawtooth grooves;

[0036] A threaded sleeve passes through the centers of the two angle limiting circular rings and is fixedly mounted on the U-shaped structure, and the middle portion of the threaded sleeve is suitable for threaded installation of the joint driving member;

[0037] A rotating shaft hole is provided at the end of the second side plate and is suitable for being rotatably sleeved on the outside of the threaded sleeve;

[0038] There are two limit clamps, which are rotatably sleeved on the threaded sleeve and are arranged on both sides of the second side plate, and have retractable limit clamping teeth, and the retractable limit clamping teeth have an initial state and an adjustment state;

[0039] In the initial state, the retractable limit clamping teeth are clamped into the sawtooth groove, and the limit clamping piece cannot rotate freely around the threaded sleeve;

[0040] In the adjustment state, the retractable limiting latch tooth enters the communicating bottom groove from the sawtooth groove and can rotate freely around the threaded sleeve.

[0041] As a preferred solution, the limit card includes:

[0042] A pressing member, including the retractable limiting latch, installed inside the U-shaped structure;

[0043] A rotating sleeve, located outside the U-shaped structure, having a rotating hole rotatably sleeved on the threaded sleeve;

[0044] A connecting column is used to fixedly connect the pressing piece and the rotating sleeve.

[0045] As a preferred solution, the pressing member includes:

[0046] A pressing shell is installed inside the U-shaped structure, and has a mounting cavity, and a top opening and a side opening communicating with the mounting cavity;

[0047] The pressing column comprises a pressing portion, a limiting flange, a retractable limiting latch and a tail column; the pressing portion extends outward from the top opening; the limiting flange is located inside the top opening; the retractable limiting latch extends from the side opening; an elastic member is sleeved on the tail column;

[0048] In the initial state, the elastic member has a tendency to push the pressing column upward, the pressing portion protrudes from the top opening by a certain height, and the retractable limiting tooth is located inside the sawtooth groove;

[0049] In the adjustment state, the pressing portion is pressed downward, the elastic member is compressed and shortened, and the retractable limiting tooth moves downward along with the pressing column and enters the communicating bottom groove from the sawtooth groove.

[0050] The technical solution provided by the present invention has the following advantages:

[0051] 1. The auxiliary fixation brace of the present invention comprises a lateral limiter, a fixed connection member, a pressing installation member and a joint driving member; the lateral limiters are arranged in pairs, and have a first side plate and a second side plate connected together at their ends at a certain angle, and the two side plates are respectively used to connect with the femoral side and the tibial side of the patient's leg to keep the patient's leg at a certain angle; there are two fixed connections, which are respectively used to fix and connect the two first side plates or the two second side plates so that the two first side plates or the two second side plates remain parallel to each other; there are two pairs of pressing installation members, one pair is relatively mounted on the two first side plates, and the other pair is relatively mounted on the two second side plates; at least one joint driving member is mounted on the first side plate and The second side plate is connected to the position; when the auxiliary fixation brace of the present invention is used, the fixed connection piece is first opened, and a pair of lateral limiters are respectively placed on the inner side and the outer side of the affected limb; then the fixed connection piece and the pressing installation piece are operated to fix them on both sides of the patient's leg, wherein a pair of first side plates are placed on both sides of the femur, and a pair of second side plates are placed on both sides of the tibia; the fixed connection piece is used to keep the two first side plates parallel to each other, and the two second side plates are parallel to each other, and the pressing installation piece is used to fix and install the lateral limiters by pressing the patient's leg; then the joint driving piece is driven to push the knee joint inward or outward, and after reaching the target degree, the inward or outward degree is maintained, and the patient's knee joint is photographed.

[0052] The auxiliary fixation brace of the present invention can push the patient's knee joint to maintain inversion or eversion and maintain it for a certain period of time for X-ray shooting. The doctor no longer needs to maintain it manually, and the doctor does not need to be exposed to the radiation environment, so it is safer.

[0053] 2. The auxiliary fixing brace of the present invention, the fixed connecting piece includes: a fixed connecting plate and an amplitude limiting plate; the two fixed connecting plates are fixedly connected to the two first side plates or the two second side plates; one end of the amplitude limiting plate is provided with two limiting threaded holes, and the corresponding fixed connecting plate is provided with two fixed connecting through holes, and the two fixed connecting bolts pass through the fixed connecting through holes and are screwed to the limiting threaded holes, thereby connecting the amplitude limiting plate to one end of the fixed connecting plate; the other end of the amplitude limiting plate is provided with two limiting through holes, and the corresponding fixed connecting plate is provided with two fixed plug-in bolts, and the two fixed plug-in bolts are pluggable and installed in the two limiting through holes The fixed connecting plate and the other end of the amplitude limiting plate are connected, so that the amplitude limiting plate can always be relatively perpendicular to the fixed connecting plate; the amplitude limiting plate and the fixed connecting plate are connected by the above-mentioned connection method, and the distance between the two fixed connecting plates can be freely adjusted, and then the distance between the two side limiters can be adjusted to adapt to the different thicknesses of the legs of different patients; both ends of the amplitude limiting plate are connected by two fixed connecting bolts or two fixed plug-in bolts, which can limit the relative rotation between the amplitude limiting plate and the fixed connecting plate, so as to stably maintain a pair of first side plates or a pair of second side plates in a state of being parallel to each other;

[0054] Furthermore, at least one side through hole is opened on the side of the amplitude limiting plate, which crosses the two limiting through holes, and the release bolt is pluggably installed inside the side through hole, which can limit the depth of the fixed plug-in bolt inserted into the limiting through hole; when the shooting is completed, the patient pulls out the release bolt by himself, which can quickly release the restriction on the fixed plug-in bolt, change the parallel state of a pair of first side plates or a pair of second side plates, and increase the space of the knee joint position (that is, the space between the two connection points, the connection point is the connection position of the first side plate and the second side plate), thereby reducing the restriction of the joint drive component on the patient's joint position and alleviating the pain caused by the patient's need to keep the joint inverted or everted.

[0055] 3. The auxiliary fixing brace of the present invention, the pressure mounting part includes: a pressure mounting shaft, a handle, a pressure ball, a first pressure mounting plate and a second pressure mounting plate; the pressure mounting shaft can be rotatably screwed on the first side plate or the second side plate, and when the lateral limiter needs to be pressure mounted on the affected limb, the pressure mounting shaft can be operated to spirally extrude inward until the arc-shaped pressure surface of the second pressure mounting plate is tightly against the affected limb; the pressure ball is fixedly arranged at the inner end of the pressure mounting shaft, and is located in the space formed by the buckling of the first pressure mounting plate and the second pressure mounting plate, so that when the joint is in a varus or valgus stress position due to the compression of the joint driving part, when the femur or tibia tilts accordingly, the second pressure mounting plate can follow the femur or tibia to make a corresponding tilt, so as to avoid discomfort or skin damage caused by hard squeezing. Preferably, the pressure mounting shaft passes through the fixed connection part and the lateral limiter at the same time.

[0056] 4. The auxiliary fixation brace of the present invention, the joint driving part includes: a threaded shaft, a driving handle, a square turntable, a first push plate and a second push plate; the threaded shaft can rotatably pass through the connection between the first side plate and the second side plate, and when it is necessary to squeeze the patient's knee joint, the threaded shaft can be rotated to squeeze inward until the joint driving surface on the second push plate presses against the knee joint and makes the knee joint reach the stress position; the square turntable is arranged at the inner end of the threaded shaft, and is in the circular inner cavity formed after the first push plate and the second push plate are buckled, and when the threaded shaft rotates, the square turntable rotates tangentially to the circular inner cavity; further, the joint driving surface is provided with an arc-shaped concave surface matching the knee joint, which can reduce the pain and damage to the knee joint caused by the second push plate pushing the knee joint to move.

[0057] 5. The auxiliary fixation brace of the present invention is also provided with an extension plate for connecting with the first side plate or the second side plate, so that the length of the first side plate or the second side plate can be extended to accommodate affected limbs with different lengths.

[0058] 6. The auxiliary fixing brace of the present invention, the angle control structure includes: a U-shaped structure, a threaded sleeve, a rotating shaft hole and a limit clamp; the U-shaped structure is fixedly connected to the first side plate, and the second side plate is sleeved on the threaded sleeve. When the second side plate needs to be limited, the two limit clamps can be clamped on both sides of the second side plate to make the limit clamps in an initial state; when the angle between the first side plate and the second side plate needs to be adjusted, the limit clamp on the side of the direction in which the second side plate needs to be rotated can be adjusted to a suitable position, and then the second side plate is rotated to adjust the angle between it and the first side plate. After the angle between the two side plates is adjusted, one of the limit clamps is first clamped on one side of the second side plate, and then the other limit clamp is adjusted to be clamped on the other side of the second side plate, thereby achieving the limitation of the second side plate.

[0059] The above-mentioned angle control structure can adjust the angle between the second side plate and the first side plate by adjusting the position and state of the limit clamp; that is, the auxiliary fixation brace of the present invention can adjust the angle between the first side plate and the second side plate at any time according to the angle between the femur and tibia of the patient required for shooting, so that the femur and tibia of the patient can be fixed at a specific angle, and then the joint position is driven by the joint driving member to make the knee joint reach the stress position of varus or valgus, and then the three positions of the medial compartment, the lateral compartment and the patellar compartment and other positions are clearly photographed, which is convenient for doctors to observe; it also avoids manual assistance in patient shooting, reduces the difficulty of shooting, and reduces harm to the human body.

[0060] 7. The auxiliary fixing brace of the present invention, the limiting clamp comprises: a pressing piece, a rotating sleeve and a connecting column; the pressing piece comprises a pressing shell and a pressing column installed inside the U-shaped structure; wherein the pressing shell has a mounting cavity and a top opening and a side opening connected thereto; the pressing column has a pressing portion, a limiting flange, a retractable latch tooth and a tail column end, the pressing portion extends out of the top opening, and is suitable for controlling the retractable latch tooth to enter the connecting bottom groove; the rotating sleeve is suitable for being mounted on a threaded sleeve outside the U-shaped structure; the connecting column is used to connect the rotating sleeve with the pressing piece. The auxiliary fixing brace of the present invention, when it is necessary to adjust the angle between the first side plate and the second side plate, only needs to press the pressing part on the pressing column to compress the elastic part on the tail column end, thereby driving the retractable limiting clamping teeth to move with the pressing column, and enter the connecting bottom groove from the sawtooth groove, so as to release the restriction of the second side plate on the lateral limiting part, so that the second side plate can rotate freely around the threaded sleeve; when it rotates to a suitable position, release the pressing part, so that the retractable limiting clamping teeth return to the sawtooth groove, and the second side plate can be limited and locked again. The auxiliary fixing brace of the present invention is simple to operate, light in structure, and improves the work efficiency of doctors. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the prior art or the specific implementation manner of the present invention, the drawings used in the description of the prior art or the specific implementation manner are briefly introduced below.

[0062] Figure 1 It is a schematic diagram of the overall structure of the auxiliary fixation brace of the present invention.

[0063] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the fixed connection parts.

[0064] Figure 3 yes Figure 1 Schematic diagram of the exploded structure of the pressing mounting part.

[0065] Figure 4 yes Figure 1 Schematic diagram of the exploded structure of the joint drive parts.

[0066] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle extension plate.

[0067] Figure 6 yes Figure 1 Schematic diagram of the exploded structure of the side limiter.

[0068] Figure 7 yes Figure 6 Schematic diagram of the structure of the limit card.

[0069] Figure numerals: 1, lateral limiter; 11, first side plate; 12, second side plate; 13, second mounting through hole; 14, U-shaped structure; 140, inner side; 141, angle limiter ring; 142, serrated groove; 143, connecting bottom groove; 15, threaded sleeve; 16, shaft hole; 17, limiter clamp; 170, retractable limiter clamp; 171, pressing member; 172, rotating sleeve; 173, connecting column; 174, rotating hole; 175, pressing shell; 176, pressing column; 177, mounting cavity; 178, top opening; 179, side opening; 180, pressing portion; 2, fixed connector; 21, fixed connecting plate; 210, fixed connecting through hole Hole; 211, fixed plug-in bolt; 22, amplitude limit plate; 220, limit threaded hole; 221, limit through hole; 222, side through hole; 223, release bolt; 23, fixed connecting bolt; 3, pressing mounting member; 31, pressing mounting shaft; 32, handle; 33, pressing ball; 34, first pressing mounting plate; 340, pressing mounting hole; 35, second pressing mounting plate; 350, arc-shaped pressing surface; 4, joint driving member; 41, threaded shaft; 42, driving handle; 43, square turntable; 44, first push plate; 440, circular through hole; 45, second push plate; 450, circular inner cavity; 451, joint driving surface; 5, extension plate; 51, first mounting through hole. DETAILED DESCRIPTION

[0070] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings.

[0071] Example

[0072] This embodiment provides an auxiliary fixing brace, such as Figure 1 As shown, it includes: a lateral limiting component 1, a fixed connecting component 2, a pressing mounting component 3 and a joint driving component 4.

[0073] Among them, the lateral limit members 1 are arranged in pairs, having a first side plate 11 and a second side plate 12 connected at the ends; there are two fixed connecting members 2, which are respectively used to fix the two first side plates 11 and the two second side plates 12 and keep the two first side plates 11 and the two second side plates 12 parallel to each other; there are two pairs of pressing mounting members 3, which are respectively installed on the two first side plates 11 and the two second side plates 12; there is at least one joint driving member 4, which is installed at the position where the first side plate 11 and the second side plate 12 are connected to each other.

[0074] When the auxiliary fixation brace of this embodiment is used, first open the fixed connection member 2 and put the lateral limiter 1 on the affected limb; then operate the fixed connection member 2 and the pressing mounting member 3 to fix the pressing mounting member 3 on both sides of the patient's leg; specifically, the fixed connection member 2 is used to keep the two first side plates 11 and the two second side plates 22 parallel to each other, and the pressing mounting member 3 fixes the lateral limiter 1 on both sides of the patient's leg by connecting with the lateral limiter 1; then drive the joint driving member 4 to push the knee joint inward or outward and maintain it. After reaching the target degree, maintain the degree of inward or outward, and take a picture of the patient's knee joint. The auxiliary fixation brace of this embodiment can push the patient's knee joint to maintain inward or outward rotation and maintain it for a certain period of time for X-ray shooting. It is no longer necessary for the doctor to manually maintain it, and the doctor does not need to be exposed to the radiation environment, so it is safer.

[0075] like Figure 2 As shown, the auxiliary fixing brace of this embodiment, the fixed connection member 2 includes: a fixed connection plate 21 and an amplitude limiting plate 22. Among them, there are two fixed connection plates 21, which are fixedly connected to the two first side plates 11 and the two second side plates 12 respectively; one end of the amplitude limiting plate 22 is provided with two limiting threaded holes, and the two corresponding fixed connection plates 21 are provided with two fixed connection through holes 210, and two fixed connection bolts 23 pass through the fixed connection through holes 210 and are screwed with the limiting threaded holes 220; the other end of the amplitude limiting plate 22 is provided with two limiting through holes 221, and the fixed connection plate 21 opposite to the two limiting through holes 221 is provided with two fixed plug-in bolts 211, and the two fixed plug-in bolts 211 are pluggably installed inside the two limiting through holes 221; the outer diameter of the fixed plug-in bolt 211 is smaller than the inner diameter of the limiting through hole 221; Furthermore, at least one side through hole 222 that crosses the two limiting through holes 221 is opened on the side of the amplitude limiting plate 22, and the release bolt 223 is pluggably installed inside the side through hole 222 to limit the insertion depth of the fixed plug-in bolt 211; when the shooting is completed, the patient can pull out the release bolt 223 by himself, quickly release the restriction on the fixed plug-in bolt 211, change the parallel state of a pair of first side plates 11 or a pair of second side plates 12, increase the space of the knee joint position (that is, the space between the two connection points, the connection point is the connection position of the first side plate 11 and the second side plate 12), thereby reducing the restriction of the patient's joint position on the joint driving component 4, and reducing the pain caused by the patient's need to keep the joint inverted or everted.

[0076] like Figure 3 As shown, the pressing mounting member 3 includes: a mortgage mounting shaft 31 , a handle 32 , a pressing ball 33 , a first pressing mounting plate 34 and a second pressing mounting plate 35 .

[0077] Among them, the pressure mounting shaft 31 is screwed and connected to the first side plate 11 or the second side plate; the handle 32 is fixedly arranged on the outer end of the pressure mounting shaft 31; the pressure ball 33 is fixedly arranged on the inner end of the pressure mounting shaft 31; the pressure mounting shaft 31 passes through the pressure mounting hole 340 opened on the first pressure mounting plate 34 and is connected to the first pressure mounting plate 34, and the inner diameter of the pressure mounting hole 340 is smaller than the diameter of the pressure ball 33; the second pressure mounting plate 35 is buckled with the first pressure mounting plate 34, and a storage space for storing the pressure ball 33 is formed between the two pressure mounting plates. The second pressure mounting plate 35 is away from the side of the first pressure mounting plate 34, and is provided with an arc-shaped pressure surface 350 matching the patient's knee joint.

[0078] The auxiliary fixation brace of this embodiment, when it is necessary to press and install the lateral limiter 1 on the affected limb, the pressing installation shaft 31 is operated to spirally extrude inward until the arc-shaped pressing surface 350 on the second pressing installation plate 35 is tightly pressed against the affected limb; the pressing ball 33 can ensure that when the knee joint is squeezed by the joint driving member 4 and is in a varus or valgus stress position (at this time the femur or tibia is tilted), the second pressing installation plate 35 can follow the femur or tibia to make a corresponding tilt, so as to avoid discomfort or skin damage caused by hard squeezing.

[0079] like Figure 4 As shown, the joint driving member 4 includes: a threaded shaft 41 , a driving handle 42 , a square turntable 43 , a first push plate 44 and a second push plate 45 .

[0080] Among them: the threaded shaft 41 is screwed with the connection between the first side plate 11 and the second side plate 12, and is connected and passed through the lateral limiter 1; the driving handle 42 is fixedly arranged at the outer end of the threaded shaft 41; the square turntable 43 is fixedly arranged at the inner end of the threaded shaft 41; the first push plate 44 is sleeved on the threaded shaft 41 through a circular through hole 440 arranged at the center, and is located between the driving handle 42 and the square turntable 43; the second push plate 45 is buckled with the first push plate 44, and a circular inner cavity 450 is formed in the middle for the square turntable 43 to rotate; the side of the second push plate 45 away from the first push plate 44 is a joint driving surface 451. When it is necessary to squeeze the patient's knee joint, the threaded shaft 41 can be rotated to drive the square turntable 43 to squeeze inward until the joint driving surface 451 on the second push plate 45 presses against the knee joint, and then the threaded shaft 41 is continued to rotate to make the knee joint reach the stress position.

[0081] Furthermore, the joint driving surface 451 is provided with an arc-shaped concave surface matching the knee joint, which can reduce the pain and damage to the patient when the second push plate 45 pushes the knee joint to move.

[0082] like Figure 5As shown, the auxiliary fixation brace of this embodiment is further provided with an extension plate 5, on which at least two first mounting through holes 51 are provided, and on which at least two second mounting through holes 13 are provided, the first side plate 11 or the second side plate 12 is provided. The extension plate 5 is connected to the first side plate 11 or the second side plate 12 by mounting bolts installed through the first mounting through holes 51 and the second mounting through holes 13, thereby extending the length of the first side plate 11 or the second side plate 12 to facilitate use for affected limbs of different lengths.

[0083] like Figure 6-7 As shown, in the auxiliary fixing brace of this embodiment, the first side plate 11 and the second side plate 12 are rotatably connected via an angle control structure, and the angle control structure includes: a U-shaped structure 14, a threaded sleeve 15, a rotating shaft hole 16 and a limiting clamp 17.

[0084] The U-shaped structure 14 is arranged at the end of the first side plate 11, and two opposite angle limiting rings 141 are fixedly arranged on two opposite inner sides 140. The angle limiting ring 141 has a plurality of continuously arranged sawtooth grooves 142 and a connecting bottom groove 143 connected to all the sawtooth grooves 142; the threaded sleeve 15 passes through the center of the two angle limiting rings 141, is fixedly penetrated on the U-shaped structure 14, and is provided with an internal thread inside, which is suitable for the joint driving member 4 to be screwed and installed; the shaft hole 16 is arranged at the end of the second side plate 12, which is suitable for rotatably sleeved It is arranged on the outside of the threaded sleeve 15; there are two limit clamps 17, which are rotatably mounted on the threaded sleeve 15 and are arranged on both sides of the rotation direction of the second side plate 12, and have retractable limit clamps 170, and the retractable limit clamps 170 have an initial state and an adjustment state; in the initial state, the retractable limit clamps 170 are inserted into the inside of the serrated groove 142, and the limit clamps 17 cannot rotate freely around the threaded sleeve 15; in the adjustment state, the retractable limit clamps 170 enter the connecting bottom groove 143 from the serrated groove 142 and can rotate freely around the threaded sleeve 15.

[0085] In the auxiliary fixation brace of the present embodiment, the angle control structure adjusts the angle between the second side plate 12 and the first side plate 11 by adjusting the position and state of the limit clamp 17; that is, the angle between the first side plate 11 and the second side plate 12 can be adjusted at any time according to the angle between the femur and the tibia of the patient required for shooting, so that the femur and the tibia of the patient can be fixed at a specific angle, and then the knee joint is made to reach the stress position of varus or valgus through the joint driving member 4, and then the three positions of the medial compartment, the lateral compartment and the patellar compartment and other positions are clearly photographed, which is convenient for doctors to observe; it also avoids artificial assistance in patient shooting, reduces the difficulty of shooting, and reduces the harm to the human body.

[0086] like Figure 7As shown, in the auxiliary fixing brace of this embodiment, the limiting clamp 17 includes: a pressing member 171, a rotating sleeve 172 and a connecting column 173; the pressing member 171 includes a pressing shell 175 and a pressing column 176 installed inside the U-shaped structure 14. The pressing housing 175 is installed inside the U-shaped structure 14, and has a mounting cavity 177, and a top opening 178 and a side opening 179 connected to the mounting cavity 177; the pressing column 176 has a pressing portion 180, a limiting flange, a retractable limiting latch 170 and a tail end column; the pressing portion 180 extends outward from the top opening 178; the limiting flange is located inside the top opening 178; the retractable limiting latch 170 extends from the side opening 179; an elastic member is sleeved on the tail end column; the rotating sleeve 172 is located outside the U-shaped structure 14, and has a rotating hole 174 rotatably sleeved on the threaded sleeve 15; a connecting column 173 is fixedly connected to the pressing member 171 and the rotating sleeve 172;

[0087] When the retractable limit tooth 170 is in the initial state, the elastic member has a tendency to push the pressing column 176 upward, the pressing portion 180 protrudes a certain height from the top opening 178, and the retractable limit tooth 170 is located inside the serrated groove 142; when the retractable limit tooth 170 needs to be changed to the adjustment state, the pressing portion 180 is pressed downward, the elastic member is compressed and shortened, and the retractable limit tooth 170 moves downward with the pressing column 176, slides out of the serrated groove 142 and enters the connecting bottom groove 143.

[0088] When the auxiliary fixing brace of the present embodiment needs to adjust the angle between the first side plate 11 and the second side plate 12, it is only necessary to press the pressing portion 180 on the pressing column 176 to compress the elastic member on the tail column end, thereby driving the retractable limiting tooth 170 to move with the pressing column 176 and enter the connecting bottom groove 143 from the sawtooth groove 142, thereby releasing the restriction on the second side plate 12 on the lateral limiting member 1, so that the second side plate 12 can rotate freely around the threaded sleeve 15; when it is rotated to a suitable position, the pressing portion 180 is released to make the retractable limiting tooth 170 return to the sawtooth groove 142, so that the second side plate 12 can be limited and locked again.

[0089] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An auxiliary fixation brace for preoperative imaging evaluation of unicompartmental replacement, characterized in that: include: The lateral stoppers (1) are arranged in pairs and comprise a first side plate (11) and a second side plate (12) whose ends are connected at a certain angle; There are two fixed connecting members (2), one for fixedly connecting the two first side panels (11) and keeping the two first side panels (11) parallel; and the other for fixedly connecting the two second side panels (12) and keeping the two second side panels (12) parallel; The pressing mounting members (3) are in two pairs, one pair being mounted relatively on the two first side plates (11), and the other pair being mounted relatively on the two second side plates (12); At least one joint driving member (4) is installed at the position where the first side plate (11) and the second side plate (12) are connected, and is suitable for driving the knee joint inward or outward; The first side plate (11) and the second side plate (12) are rotatably connected via an angle control structure; The angle control structure comprises: A U-shaped structure (14) is arranged at the end of the first side plate (11), and two opposite angle limiting circular rings (141) are fixedly arranged on two opposite inner side surfaces (140), and the angle limiting circular rings (141) have a plurality of continuously arranged sawtooth grooves (142) and a connecting bottom groove (143) connected to all the sawtooth grooves (142); A threaded sleeve (15) passes through the centers of the two angle limiting circular rings (141) and is fixedly mounted on the U-shaped structure (14), with the middle portion being suitable for threaded installation of the joint driving component (4); A rotating shaft hole (16) is provided at an end of the second side plate (12) and is suitable for being rotatably sleeved on the outside of the threaded sleeve (15); Two limit clamps (17) are rotatably sleeved on the threaded sleeve (15), respectively disposed on two sides of the second side plate (12), and have retractable limit clamp teeth (170), wherein the retractable limit clamp teeth (170) have an initial state and an adjustment state; In the initial state, the retractable limiting clamping tooth (170) is clamped into the sawtooth-shaped groove (142), and the limiting clamping member (17) cannot freely rotate around the threaded sleeve (15); In the adjustment state, the retractable limiting latch tooth (170) enters the communicating bottom groove (143) from the sawtooth groove (142) and can rotate freely around the threaded sleeve (15); The limit clamp (17) comprises: A pressing member (171), comprising the retractable limiting latch (170), installed inside the U-shaped structure (14); A rotating sleeve (172) located outside the U-shaped structure (14) and having a rotating hole (174) rotatably sleeved on the threaded sleeve (15); A connecting column (173) fixedly connecting the pressing member (171) and the rotating sleeve (172); The pressing member (171) comprises: A pressing shell (175) is installed inside the U-shaped structure (14), and has a mounting cavity (177), and a top opening (178) and a side opening (179) that are in communication with the mounting cavity (177); The pressing column (176) comprises a pressing portion (180), a limiting flange, a retractable limiting latch tooth (170) and a tail end column; the pressing portion (180) extends outward from the top opening (178); the limiting flange is located inside the top opening (178); the retractable limiting latch tooth (170) extends from the side opening (179); and an elastic member is sleeved on the tail end column; In the initial state, the elastic member has a tendency to push the pressing column (176) upward, the pressing portion (180) protrudes from the top opening (178) to a certain height, and the retractable limiting tooth (170) is located inside the sawtooth groove (142); In the adjustment state, the pressing portion (180) is pressed downward, the elastic member is compressed and shortened, and the retractable limit locking tooth (170) moves downward following the pressing column (176) and enters the connecting bottom groove (143) from the sawtooth groove (142).

2. The auxiliary fixation brace according to claim 1, characterized in that: The fixed connection member (2) comprises: There are two fixed connection plates (21), which are respectively used to be fixedly connected to the two first side plates (11) or the two second side plates (12); There are two amplitude limiting plates (22), which are respectively arranged in the middle of the head end and the middle of the tail end of the two fixed connection plates (21) so as to be quickly detachable.

3. The auxiliary fixation brace according to claim 2, characterized in that: Two limiting threaded holes (220) are provided at one end of the amplitude limiting plate (22); two fixing connection through holes (210) are provided on the fixing connection plate (21) opposite to the two limiting threaded holes (220); two fixing connection bolts (23) pass through the fixing connection through holes (210) and are screwed to the limiting threaded holes (220); The other end of the amplitude limiting plate (22) is provided with two limiting through holes (221); the fixed connecting plate (21) opposite to the two limiting through holes (221) is provided with two fixed plug-in bolts (211); the two fixed plug-in bolts (211) are pluggably installed inside the two limiting through holes (221); the outer diameter of the fixed plug-in bolts (211) is smaller than the inner diameter of the limiting through holes (221); At least one side through hole (222) is also provided on the side surface of the amplitude limiting plate (22) and crosses the two limiting through holes (221); a release bolt (223) is pluggably installed inside the side through hole (222) and is used to limit the insertion depth of the fixed plug-in bolt (211).

4. The auxiliary fixation brace according to claim 1, characterized in that: The pressing mounting member (3) comprises: A pressing installation shaft (31) is screwed onto the first side plate (11) or the second side plate (12); A handle (32) fixedly disposed on the outer end of the pressing mounting shaft (31); A pressing ball (33) fixedly arranged on the inner end of the pressing mounting shaft (31); A first pressing installation plate (34) is sleeved on the pressing installation shaft (31) via a pressing installation hole (340), and the inner diameter of the pressing installation hole (340) is smaller than the diameter of the pressing ball (33); The second pressing mounting plate (35) is buckled with the first pressing mounting plate (34), and a space for accommodating the pressing ball is formed in the middle; a side of the second pressing mounting plate (35) away from the first pressing mounting plate (34) is provided with an arc-shaped pressing surface (350).

5. The auxiliary fixation brace according to claim 4, characterized in that: The pressing installation shaft (31) is arranged to pass through both the fixed connection member (2) and the lateral limiting member (1).

6. The auxiliary fixation brace according to claim 1, characterized in that: The joint driving member (4) comprises: A threaded shaft (41) threadedly connected to a connection between the first side plate (11) and the second side plate (12); A driving handle (42) fixedly disposed on the outer end of the threaded shaft (41); A square rotating disk (43) fixedly disposed on the inner end of the threaded shaft (41); A first push plate (44) is sleeved on the threaded shaft (41) through a circular through hole (440) provided at a central position, and is located between the driving handle (42) and the square turntable (43); The second push plate (45) is buckled with the first push plate (44) and has a circular inner cavity (450) formed in the middle for the square turntable (43) to rotate; the side of the second push plate (45) away from the first push plate (44) is a joint driving surface (451).

7. The auxiliary fixation brace according to claim 1, characterized in that: It also includes an extension plate (5) suitable for connecting to the first side plate (11) or the second side plate (12); The extension plate (5) is provided with at least two first mounting through holes (51), and the first side plate (11) or the second side plate (12) is provided with at least two second mounting through holes (13); the extension plate (5) is connected to the first side plate (11) or the second side plate (12) via mounting bolts installed through the first mounting through holes (51) and the second mounting through holes (13).

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