Osteotomy correction auxiliary device

Abstract

The invention discloses an osteotomy correction auxiliary device, comprising: a fixing mechanism and an adjusting mechanism; the adjusting mechanism is fixedly installed on the fixing mechanism, and the adjusting mechanism comprises a telescopic bracket, a connecting rod, a protractor, a cross bar, and a U-shaped pin of a feed rod; the lower end of the telescopic bracket is fixedly connected to two sides of a clamping plate arranged on the fixing mechanism, and the lower part of the telescopic mechanism is hinged to a connecting rod, and the connecting rod comprises a first connecting rod, a second connecting rod, and a third connecting rod connected end to end, and the middle part of the second connecting rod is rotatably connected to the feed rod, and the first ends of the second connecting rods on both sides of the telescopic bracket are fixedly connected through the cross bar; the protractor is fixedly installed at the hinge between the first end of the first connecting rod and the telescopic bracket; the fixing mechanism comprises a fixing seat, a clamping plate, a handle, and a Kirschner wire seat, one half of the fixing seat is provided with a Kirschner wire seat, and the other half is provided with a through groove, and a square groove is provided in the middle part, and the lower end of the middle of the square groove is rotatably connected to the handle, and two clamping plates are slidably connected on both sides of the square groove; a gear is provided at the lower end of the handle to mesh with the clamping plate; the clamping plate is a rectangular parallelepiped structure, and a square rod is provided at the upper end.

Description

Technical Field

[0001] The invention belongs to the technical field of osteotomy correction medical devices, and in particular relates to an osteotomy correction auxiliary device. Background Art

[0002] Bone deformity refers to the abnormal development of an organ or part of its structure due to fetal development or acquired factors. Common ones include congenital hip dislocation, torticollis, limb bone loss, osteogenesis imperfecta, and varus and valgus of both lower limbs. Bone deformity may also be caused by acquired diseases or bone injuries. The treatment methods are different for different degrees of bone deformity. For mild conditions, corrective devices and corrective exercises are usually used to assist in the treatment of mild symptoms of deformed bones. However, for deformed bones caused by bone injuries and those with large angles that are difficult to correct due to congenital development time and long development time, osteotomy is required for treatment. Osteotomy refers to the use of ordinary bone knives or ultrasonic bone knives to intercept or cut bone tissue at a certain angle during surgery.

[0003] Due to the danger of osteotomy, the osteotomy operation requires precise preparation. Before osteotomy, the biomechanical properties of the bone need to be tested, and the deformed bone model needs to be restored based on existing imaging technology. Based on the established model, the osteotomy angle is accurately measured, and then the osteotomy operation is performed accurately based on the measured angle.

[0004] However, due to the irregularity of the deformed bone, the existing osteotomy correction auxiliary device may have problems such as unstable clamping and clamping failure when clamping the deformed bone under the influence of the deformed bone; and when the osteotomy is inserted, the insertion angle can only be simply measured externally, which may cause a large difference between the osteotomy angle and the accurately measured osteotomy angle, affecting the correction of the deformed bone and even causing osteotomy failure;

[0005] In summary, the problems existing in the prior art are:

[0006] 1. The osteotomy correction auxiliary device in the prior art has a weak clamping effect on the deformed bone and is prone to slipping;

[0007] 2. The osteotomy correction auxiliary device in the prior art has a relatively rough measurement of the osteotomy entry angle, which may have a large error with the osteotomy angle calculated by actual modeling measurement, affecting the effect of deformity bone correction and even causing the failure of deformity bone osteotomy correction surgery. Summary of the invention

[0008] In order to solve the above technical problems, the present invention designs an osteotomy correction auxiliary device, which is stably clamped on the deformed bone through a clamping device to facilitate subsequent surgical operations; an adjustment mechanism is provided to actually adjust the measuring scissors angle according to the cutting angle calculated by modeling, so as to make the osteotomy more accurate.

[0009] In order to achieve the above technical effects, the present invention is implemented through the following technical solutions:

[0010] An osteotomy correction auxiliary device comprises: a fixing mechanism and an adjusting mechanism;

[0011] The fixing mechanism is fixedly installed with an adjusting mechanism, and the adjusting mechanism comprises a telescopic bracket, a connecting rod, a protractor, a cross bar, a feed rod, and a U-shaped latch; the lower end of the telescopic bracket is fixedly connected to both sides of the card plate arranged on the fixing mechanism, and the lower part of the telescopic bracket is hingedly connected to a connecting rod, and the connecting rod comprises a first connecting rod, a second connecting rod, and a third connecting rod connected end to end, and the second connecting rod is rotatably connected to the feed rod; the middle shaft of the feed rod is connected to the outer wall of the fixing seat, and the rotating shaft at one end is connected to the second connecting rod, and the head ends of the second connecting rods on both sides of the telescopic bracket are fixedly connected through a cross bar; the protractor is fixedly installed at the hinge between the head end of the first connecting rod and the telescopic bracket, and circular holes are distributed in an array on the protractor, and U-shaped latches are arranged on the circular holes; the connecting rod is toggled along the protractor to drive the feed rod to rotate and adjust to the required feed angle, and the U-shaped latch is inserted into the circular hole on the protractor to fix the feed rod;

[0012] The fixing mechanism comprises a fixing seat, a clamping plate, a handle, and a Kirschner wire seat. The fixing seat is provided with a Kirschner wire seat on one half, and a through groove is provided on the other half. A square groove is provided in the middle. The lower end of the middle of the square groove is rotatably connected to the handle, and two clamping plates are slidably connected on both sides of the square groove. A gear is provided at the lower end of the handle to mesh with the clamping plate. The clamping plate is a rectangular parallelepiped structure, and a square rod is provided at the upper end. A gear is provided at one end of the square rod to mesh with the handle. By rotating the handle, the lower gear is controlled to rotate to drive the clamping plates on both sides to move closer or farther from each other to achieve the clamping of the deformed bone.

[0013] Wherein, the rotation angle of the first connecting rod is the same as the rotation angle of the feed rod;

[0014] Furthermore, the clamping plate is a rectangular thin plate, a square rod is arranged on the upper end of the thin plate, a gear meshing connection handle is arranged on one side of the square rod, and the square rod is slidably installed in the square groove to drive the thin plate to slide in the lower part of the square groove of the fixing seat;

[0015] Furthermore, a cylinder for the Kirschner wire to be inserted into is provided at the upper end of the Kirschner wire seat;

[0016] Furthermore, the connecting rod comprises a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod, the second connecting rod and the third connecting rod are connected at their ends to form a parallelogram with the telescopic bracket, the first connecting rod head end is hinged to the telescopic bracket, the third connecting rod tail end is hinged to the telescopic bracket, and the middle shaft of the second connecting rod is connected to the feed rod;

[0017] Furthermore, the telescopic bracket includes a telescopic rod 1, a vertical rod, and a telescopic rod 2. Driven by the clamping plate, the telescopic rod 1 and the telescopic rod 2 can be extended and retracted;

[0018] Furthermore, the protractor corresponds exactly to 0 degrees of the protractor when the first connecting rod is horizontal;

[0019] Furthermore, one half of the fixing seat is provided with a Kirschner wire seat, and the other half is provided with a through groove, and the through groove is the cutting edge of the osteotomy knife.

[0020] The beneficial effects of the present invention are:

[0021] The present invention designs an osteotomy correction auxiliary device, including: a fixing mechanism and an adjusting mechanism. The fixing mechanism is set, and the handle is turned to drive the clamping plate meshed with the lower gear to move closer or farther synchronously to adapt to patients of different ages, different body shapes and different parts of the bones with different thicknesses. The bones can be firmly clamped by the fixing mechanism, solving the problem of easy clamping slippage in the prior art.

[0022] An adjustment mechanism is provided, and based on the mathematical principle of equal equilateral angles, the rotation angle of the first connecting rod is the same as the rotation angle of the feed rod. Taking the protractor as the standard, the first connecting rod is rotated to drive the entire connecting rod and the feed rod to rotate. The cross-section formed by the feed rod after rotation is the standard feed angle inclined plane. The feed is carried out along this cross-section, and the deformed bone can be accurately cut. This solves the problem in the prior art that the feed angle is simply measured from the outside, resulting in a large deviation from the actual feed angle, resulting in poor osteotomy correction effect, or directly leading to osteotomy correction failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0024] Figure 1 It is a schematic diagram of the overall structure of an osteotomy correction auxiliary device;

[0025] Figure 2 The present invention is a schematic diagram of the structure of a handle and a clamping plate of a fixing mechanism of an osteotomy correction auxiliary device being meshed and connected;

[0026] Figure 3 It is a structural schematic diagram of an adjustment mechanism of an osteotomy correction auxiliary device;

[0027] Figure 4 It is a schematic diagram of the structure of a telescopic bracket of an osteotomy correction auxiliary device;

[0028] Figure 5 The present invention is a structural schematic diagram of a fixing seat of an osteotomy correction auxiliary device.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1-fixed seat, 101-Kirschner wire seat, 102-through slot, 2-clip plate, 3-telescopic bracket, 301-telescopic rod 1, 302-vertical rod, 303-telescopic rod 2, 4-connecting rod, 401-first connecting rod, 402-second connecting rod, 403-third connecting rod, 404-cross bar, 5-handle, 6-protractor, 7-feed rod, 8-U-shaped pin. DETAILED DESCRIPTION

[0031] The osteotomy correction auxiliary device of the present invention solves the problem in the prior art that due to the irregularity of the deformed bone, the existing clamping and fixing device has weak clamping force and is easy to slip, and the problem in the prior art that the osteotomy angle measurement during osteotomy is relatively rough and not accurate enough, and there is a large deviation between the actual required cutting angle, which will lead to poor effect of osteotomy deformity correction or directly lead to failure of osteotomy correction.

[0032] The osteotomy correction auxiliary device of the present invention comprises: a fixing mechanism and an adjusting mechanism;

[0033] The fixing mechanism is fixedly installed with an adjusting mechanism, and the adjusting mechanism includes a telescopic bracket 3, a connecting rod 4, a protractor 6, a cross bar 404, a feed rod 7, and a U-shaped pin 8; the lower end of the telescopic bracket 3 is fixedly connected to both sides of the clamping plate 2 arranged on the fixing mechanism, and the lower part of the telescopic mechanism is hinged to the connecting rod 4, and the connecting rod 4 includes three connecting rods 4 connected end to end, and the connecting rod 4 is rotatably connected to the feed rod 7; the middle part of the feed rod 7 is connected to the outer wall of the fixing seat 1 by a rotating shaft, and one end of the rotating shaft is connected to the connecting rod 4, and the front ends of the connecting rods 4 on both sides of the telescopic bracket 3 are fixedly connected by the cross bar 404; the protractor 6 is fixedly installed at the upper end of the connecting rod 4 and the hinged part of the telescopic bracket 3; the connecting rod 4 is moved along the protractor 6 to drive the feed rod 7 to rotate and adjust to the required feed angle;

[0034] The fixing mechanism includes a fixing seat 1, a clamping plate 2, a handle 5, and a Kirschner wire seat 101. The Kirschner wire seat 101 is arranged on one half of the fixing seat 1, and a through groove 102 is opened on the other half. A square groove is opened in the middle. The lower end of the middle of the square groove is rotatably connected to the handle 5, and the two clamping plates 2 are slidably connected on both sides of the square groove; a gear is arranged at the lower end of the handle 5 to mesh with the clamping plate 2; the clamping plate 2 is a rectangular parallelepiped structure, a square rod is arranged at the upper end, and a gear is arranged at one end of the square rod to mesh with the handle 5; by rotating the handle 5, the lower gear is controlled to rotate to drive the clamping plates 2 on both sides to move closer or farther from each other to achieve deformed bone clamping.

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] Example 1

[0037] In the present invention, an osteotomy correction auxiliary device is disclosed. In order to ensure the accuracy of the osteotomy operation, some preparation work is usually required before osteotomy:

[0038] S1 uses CT to scan the patient's deformed bone parts;

[0039] S2 constructed a three-dimensional model of the deformed bone in Mimics 20.0 software on the computer terminal;

[0040] S3.1 For deformed bones with smaller deformation, the cutting angle and cutting depth are determined on the computer model according to the shape and length of the deformed bone;

[0041] S3.2 For deformed bones with a large degree of deformity, a three-dimensional model of the deformed bone is constructed according to the Mimics20.0 software on the computer terminal, and then the deformed bone is 3D printed in proportion using 3D printing technology, and the clamping position and cutting angle are carefully determined;

[0042] In this embodiment, the more conventional CT scanning method of the hospital is used to scan and detect the deformed part of the patient, and a three-dimensional model is constructed in the Mimics 20.0 software on the computer terminal to accurately calculate the entry angle of the osteotomy to assist the osteotomy correction surgery; for deformed bones with larger deformations, the three-dimensional model constructed in the Mimics 20.0 software is printed in proportion using 3D printing technology, so as to facilitate the actual and detailed determination of the clamping position and the entry position.

[0043] Example 2

[0044] like Figure 2 The figure shows a structural schematic diagram of the fixing mechanism of the osteotomy correction auxiliary device of the present invention. As shown in the figure, in the present invention, a fixing mechanism is provided, and the fixing mechanism includes: a fixing seat 1, a clamping plate 2, a handle 5, and a Kirschner wire seat 101. The Kirschner wire seat 101 is provided on one half of the fixing seat 1, and a through groove 102 is opened on the other half. A square groove is opened in the middle, and the lower end of the middle of the square groove is rotatably connected to the handle 5, and the two sides of the square groove are slidably connected to the two clamping plates 2; a gear is provided at the lower end of the handle 5 to mesh with the clamping plate 2; the clamping plate 2 is a rectangular parallelepiped structure, and a square rod is provided at the upper end, and a gear is provided at one end of the square rod to mesh with the handle 5; by rotating the handle 5, the lower gear is controlled to rotate to drive the clamping plates 2 on both sides to move closer or farther from each other to achieve the clamping of the deformed bone;

[0045] In this embodiment, a fixing seat 1 is provided, such as Figure 5 The figure shows a schematic diagram of the structure of the fixing seat 1 of the present invention, wherein one half of the fixing seat 1 is a through slot 102 and the other half is a Kirschner wire seat 101. The through slot 102 is a knife entry hole during osteotomy surgery. The osteotomy knife can pass through the knife entry hole to cut the bone downward at a certain angle and cooperate with the Kirschner wire to cut the bone.

[0046] In this embodiment, a Kirschner wire seat 101 is provided, and a syringe for inserting the Kirschner wire is provided on the upper part of the Kirschner wire seat 101. The Kirschner wire can be driven into the deformed bone through the Kirschner wire seat 101, and the bone to be removed can be removed from the human skeleton in cooperation with an osteotomy knife.

[0047] In this embodiment, the clamping plate 2 is a rectangular thin plate, a square plate is arranged on the upper end of the thin plate, a gear is arranged on one side of the square plate, and the handle 5 is meshed by the gear;

[0048] In this embodiment, the lower part of the handle 5 is a gear, and the gear extends upwardly from a round rod handle 5, which is convenient for medical personnel to hold the handle 5 outside the body and rotate the handle 5, driving the clamping plates 2 to move closer or farther away from each other to clamp different bones. The contact area with the bones is increased by the clamping plates 2, thereby enhancing the clamping stability and solving the problem of easy clamping slippage in the prior art.

[0049] Example 3

[0050] like Figure 3 The schematic diagram of the mechanism of the adjustment mechanism of the osteotomy correction auxiliary device of the present invention is shown. In the present invention, an adjustment mechanism is provided, and the adjustment mechanism includes: a telescopic bracket 3, a connecting rod 4, a protractor 6, a cross bar 404, and a feed rod 7; the lower end of the telescopic bracket 3 is fixedly connected to the two sides of the clamping plate 2 arranged on the fixing mechanism, and the lower part of the telescopic mechanism is hinged to the connecting rod 4, and the connecting rod 4 includes three connecting rods 4 connected end to end, and the connecting rod 4 is rotatably connected to the feed rod 7; the middle shaft of the feed rod 7 is connected to the outer wall of the fixing seat 1, and the rotating shaft at one end is connected to the connecting rod 4, and the front ends of the connecting rods 4 on both sides of the telescopic bracket 3 are fixedly connected through the cross bar 404; the protractor 6 is fixedly installed at the upper end of the connecting rod 4 and the hinged joint of the telescopic bracket 3; the connecting rod 4 is moved along the protractor 6 to drive the feed rod 7 to rotate and adjust to the required feed angle, and the U-shaped pin 8 is inserted into the circular hole on the protractor to fix the feed rod 7;

[0051] In this embodiment, the telescopic bracket 3 includes a telescopic rod 1 301, a telescopic rod 2 303, and a vertical rod 302. Both ends of the telescopic rod 2 303 are fixedly connected to the vertical rod 302. The lower end of the vertical rod 302 is fixedly connected to the telescopic rod 1 301. The telescopic rod 1 301 is fixedly connected to the card plate 2. When the handle 5 is turned to drive the card plates 2 to move closer or farther away from each other, the telescopic rod 1 301 and the telescopic rod 2 303 will extend outward or shrink inward with the movement of the card plate 2.

[0052] In this embodiment, the connecting rod 4 is divided into a first connecting rod 401, a second connecting rod 402, and a third connecting rod 403. The first connecting rod 401, the second connecting rod 402, and the third connecting rod 403 are connected by a head-to-tail rotating shaft. The head end of the first connecting rod 401 is hinged to the vertical rod 302 of the telescopic bracket 3, and the tail end of the third connecting rod 403 is hinged to the vertical rod 302 of the telescopic bracket 3. The first connecting rod 401, the second connecting rod 402, the third connecting rod 403 and the telescopic bracket 3 form a parallelogram. No matter how the connecting rod 4 is rotated, the parallelogram structure does not change; the connecting rod 4 on both sides of the telescopic bracket 3 is fixedly connected by a cross bar 404;

[0053] In this embodiment, the middle part of the feed rod 7 is connected to the rotating shaft of the side wall of the fixed seat 1, and one end of the feed rod 7 is connected to the rotating shaft in the middle part of the second connecting rod 402, and rotates with the second connecting rod 402. The feed rod 7 is always parallel to the first connecting rod 401 and the third connecting rod 403, and maintains a co-angle relationship; the feed rods 7 on both sides of the fixed seat 1 rotate synchronously, and the upper ends are located in the same plane. When cutting bones, the plane formed by the upper end surface of the feed rod 7 is cut, which is the standard cutting angle feed surface;

[0054] In this embodiment, the protractor 6 is fixedly connected to the connection between the vertical rod 302 of the telescopic bracket 3 and the first connecting rod 401. The protractor 6 is a prior art and can be selected from but not limited to the existing full-circular dial protractor.

[0055] In this embodiment, an adjustment mechanism is provided, which includes a telescopic bracket 3, a connecting rod 4, a protractor 6, a cross bar 404, and a feed rod 7. The first connecting rod 401 is rotated according to the feed angle calculated in the manner described in Example 1. The feed rod 7 forms a co-position angle with the entire connecting rod 4. The rotation angle of the feed rod 7 is the calculated feed angle of the first connecting rod 401. After the adjustment is completed, the bone is cut by feeding the knife into the through groove 102 on the fixed seat 1 along the upper end surface of the feed rod 7, and then the Kirschner wire is nailed into the bone through the syringe provided on the Kirschner wire seat 101. Under the joint action of the Kirschner wire and the osteotomy knife, the bone to be removed is removed, thereby solving the problem in the prior art that the osteotomy angle is roughly measured, which is quite different from the osteotomy angle calculated in the construction of the three-dimensional model in the imics 20.0 software, resulting in poor osteotomy correction effect or osteotomy correction failure.

[0056] In summary, the present invention discloses an osteotomy correction auxiliary device, including: a fixing mechanism, an adjusting mechanism, a fixing mechanism is set, a handle 5 is rotated, and the handle 5 drives the clamping plate 2 meshed with the lower gear to move closer or farther synchronously to adapt to patients of different ages, different body shapes and different parts of the bones with different thicknesses. The bones can be firmly clamped by the fixing mechanism, solving the problem of easy clamping and slipping in the prior art;

[0057] An adjustment mechanism is provided, and based on the mathematical principle of equal equilateral angles, the rotation angle of the first connecting rod 401 is the same as the rotation angle of the feed rod 7. Taking the protractor 6 as a standard, the first connecting rod 401 is rotated to drive the entire connecting rod 4 and the feed rod 7 to rotate. The cross section formed by the feed rod 7 after rotation is a standard feed angle inclined plane. The feed is carried out along this cross section, and the deformed bone can be accurately cut. This solves the problem in the prior art that the feed angle is simply measured from the outside, resulting in a large deviation from the actual feed angle, resulting in poor osteotomy correction effect, or directly leading to osteotomy correction failure.

[0058] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described.

Claims

1. An osteotomy correction auxiliary device, characterized in that: include: Fixing mechanism, adjusting mechanism; The fixing mechanism is fixedly installed with an adjusting mechanism, and the adjusting mechanism comprises a telescopic bracket, a connecting rod, a protractor, a cross bar, a feed rod, and a U-shaped latch; the lower end of the telescopic bracket is fixedly connected to both sides of the card plate arranged on the fixing mechanism, and the lower part of the telescopic bracket is hingedly connected to a connecting rod, and the connecting rod comprises a first connecting rod, a second connecting rod, and a third connecting rod connected end to end, and the second connecting rod is rotatably connected to the feed rod; the middle shaft of the feed rod is connected to the outer wall of the fixing seat, and the rotating shaft at one end is connected to the second connecting rod, and the head ends of the second connecting rods on both sides of the telescopic bracket are fixedly connected through a cross bar; the protractor is fixedly installed at the hinge between the head end of the first connecting rod and the telescopic bracket, and circular holes are distributed in an array on the protractor, and U-shaped latches are arranged on the circular holes; the connecting rod is toggled along the protractor to drive the feed rod to rotate and adjust to the required feed angle, and the U-shaped latch is inserted into the circular hole on the protractor to fix the feed rod; The connecting rod comprises a first connecting rod, a second connecting rod and a third connecting rod, which are connected end to end with the telescopic bracket to form a parallelogram, the first connecting rod is hinged at the head end to the telescopic bracket, the third connecting rod is hinged at the tail end to the telescopic bracket, and the middle shaft of the second connecting rod is connected to the feed rod; The telescopic bracket comprises a telescopic rod 1, a vertical rod and a telescopic rod 2. Driven by the clamping plate, the telescopic rod 1 and the telescopic rod 2 can be extended and retracted; The fixing mechanism comprises a fixing seat, a clamping plate, a handle, and a Kirschner wire seat. The fixing seat is provided with a Kirschner wire seat on one half, and a through groove is provided on the other half. A square groove is provided in the middle. The lower end of the middle of the square groove is rotatably connected to the handle, and two clamping plates are slidably connected on both sides of the square groove. A gear is provided at the lower end of the handle to mesh with the clamping plate. The clamping plate is a rectangular parallelepiped structure, and a square rod is provided at the upper end. A gear is provided at one end of the square rod to mesh with the handle. By rotating the handle, the lower gear is controlled to rotate to drive the clamping plates on both sides to move closer or farther from each other to achieve the clamping of the deformed bone. Wherein, the rotation angle of the first connecting rod is the same as the rotation angle of the feed rod.

2. The osteotomy correction auxiliary device according to claim 1, characterized in that: The clamping plate is a rectangular thin plate, a square rod is arranged on the upper end of the thin plate, a gear meshing connection handle is arranged on one side of the square rod, and the square rod is slidably installed in the square groove to drive the thin plate to slide in the lower part of the square groove of the fixing seat.

3. The osteotomy correction auxiliary device according to claim 1, characterized in that: A cylinder for the Kirschner wire to be inserted into is arranged at the upper end of the Kirschner wire seat.

4. The osteotomy correction auxiliary device according to claim 1, characterized in that: When the first connecting rod of the protractor is horizontal, the protractor corresponds to 0 degree.

5. The osteotomy correction auxiliary device according to claim 1, characterized in that: One half of the fixing seat is provided with a Kirschner wire seat, and the other half is provided with a through slot, and the through slot is the cutting opening of the osteotomy knife.

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