An intraoperative tool for correcting cubitus varus in adults

Abstract

The present invention discloses an intraoperative tool for correcting adult elbow varus, comprising a base plate, the upper side of the base plate being rotatably connected to a rotating plate, the right end of a top rod provided inside the base plate being movably connected to a side wall of the rotating plate, two sides of a placement plate provided on the upper side of the base plate being fixedly connected to vertical plates, a plurality of first screws being meshingly connected to the vertical plates, the inner ends of the first screws being rotatably connected to bone clamps, two sides of the upper surface of the rotating plate being fixedly connected to a fixing seat, and two guide plates being rotatably connected to the fixing seat. The present invention forms a moving track for a bone saw blade between two guide plates on the same side, and rotates a second screw to make a support rod rotate on the fixing seat against the guide plate, so that the inclinations of the two guide plates on the same side will change, so as to adjust the angle of the bone saw during osteotomy, and change the cutting angle according to the actual situation of the patient's elbow varus, thereby making the cutting angle more accurate and regular, and improving the quality of the operation.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, in particular to an intraoperative tool for correcting adult cubitus varus. Background Art

[0002] Cubital varus deformity is the most common late complication of supramalleolar fracture of humerus. Compared with children, local developmental abnormalities of cubital varus in adults are more severe, and osteotomy of the humeral condyle is required to treat cubital varus. At present, when osteotomy of the humeral condyle is performed for adult cubital varus, osteotomy is generally performed according to X-rays. The method adopted is to cut the X-ray according to the size of the osteotomy, and then stick the X-ray to the osteotomy position and cut according to the X-ray. However, since the X-ray is in the form of paper, and the bone saw is always fixed by the hands of medical staff during the osteotomy process, long-term surgery will cause fatigue of the hands of medical staff and reduce the accuracy of osteotomy. In this way, the cutting angle is not easy to fix, which may cause skew on both sides or front and back, making the cut very irregular, resulting in a decrease in the quality of the operation. In addition, in the existing osteotomy surgery, the bone saw may accidentally injure the soft tissue and cause secondary trauma to the patient. Therefore, we propose an intraoperative tool for correcting adult cubital varus. Summary of the invention

[0003] The object of the present invention is to provide an intraoperative tool for correcting cubitus varus in adults, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an intraoperative tool for correcting adult elbow varus, comprising a base plate, a rotating plate is installed at the upper right end of the base plate, a placement plate is installed at the upper middle part of the base plate, vertical plates are fixedly connected to both sides of the placement plate and located on the base plate, a plurality of first screws are meshedly connected to the vertical plates, the inner ends of the first screws are rotatably connected to bone clamps, and positioning columns are fixedly connected to the clamping surfaces of the bone clamps;

[0005] Fixed seats are fixedly connected to both sides of the upper surface of the rotating plate, and two guide plates are rotatably connected to the fixed seats. A second sliding groove is opened on the lower side of the fixed seat and located inside the rotating plate. A second screw is rotatably connected inside the second sliding groove, and a second slider is meshed on the second screw. Support rods are fixedly connected to both ends of the second slider, and the upper end of the support rod is slidably connected to the inside of a third sliding groove, and the third sliding groove is opened inside the guide plate.

[0006] Preferably, a guide column is fixedly connected to the inner wall of any guide plate on the same side, a lifting block is slidably sleeved on the outer wall of the guide column via a first spring, a pressure plate is connected to the inner wall of the lifting block, and a swing block is slidably connected to the inside of the lifting block via a second spring.

[0007] Preferably, a rotating shaft is provided on the bottom surface of the rotating plate and is rotatably inserted into a slot provided on the bottom surface of the base plate. Top rods are meshed and connected on both sides of the interior of the base plate. The right end of the top rod is movably connected to the side wall of the rotating plate, and the left end of the top rod passes through the side wall of the base plate and extends to the outside.

[0008] Preferably, the bone clamp comprises a first bone clamp and a second bone clamp, and a slider is fixedly connected to the upper side of the second bone clamp, and the slider is slidably connected to the inside of the first bone clamp.

[0009] Preferably, the first screw is meshingly connected to a sleeve fixedly connected to the inner side surface of the vertical plate, and the inner end of the first screw is rotatably connected to the first bone clamp or the second bone clamp via a bearing.

[0010] Preferably, the outer ends of the push rod, the first screw rod and the second screw rod are all fixedly connected with a rotating handle.

[0011] Preferably, a scale is provided on the outer side wall of the guide plate.

[0012] Preferably, teeth are provided on the upper side of the swing block.

[0013] Preferably, an angle ruler is provided on the outer side wall of the fixing seat.

[0014] Preferably, the pressing plate is detachably connected to the lifting block, and the pressing plate is an arc-shaped plate with an arc pointing downward.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can enable the bone clamp to fix the patient's humerus on the device by rotating the first screw rod, and a moving track of the bone saw blade is formed between the two guide plates on the same side to prevent the lateral deviation of the bone saw, and the rotating plate is rotated on the bottom plate by rotating the top rod, and the second slider is made to slide inside the second slide groove by rotating the second screw rod, so that the support rod rotates on the fixed seat against the guide plate, and the inclinations of the two sides and the front and back of the two guide plates on the same side will change, so that the angle of the bone saw during osteotomy can be adjusted, so that the cutting angle can be changed according to the actual situation of the patient's elbow varus, so that the cutting incision angle is more precise and regular, and the quality of the operation is improved; and when the bone saw moves downward from between the two guide plates, the lifting block will also slide downward, so that the pressure plate presses the patient's soft tissue and moves downward, avoiding the phenomenon of the bone saw accidentally injuring the soft tissue, thereby protecting the surrounding tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a schematic diagram of the intraoperative simulation structure of the present invention;

[0018] Figure 3It is a structural schematic diagram of the fixing seat, guide plate and angle ruler of the present invention;

[0019] Figure 4 For the present invention Figure 3 A magnified image of point A;

[0020] Figure 5 It is a cross-sectional view of the second slide groove, the second sliding block and the support rod of the present invention;

[0021] Figure 6 It is a structural exploded view of the bone clamp of the present invention;

[0022] Figure 7 It is an exploded view of the bottom plate and the rotating plate of the present invention;

[0023] Figure 8 It is a structural schematic diagram of the guide plate and the perforated plate of the present invention;

[0024] Fig. 9 It is a schematic diagram of a normal elbow valgus angle X-ray of the present invention;

[0025] Fig.10 This is a schematic diagram of an X-ray of a deformity of the elbow joint with a varus angle of about 14° according to the present invention;

[0026] Fig.11 This is an X-ray diagram of the carrying angle of the elbow joint restored to normal after surgery according to the present invention;

[0027] Fig.12 It is a schematic diagram of the cutting of the simulated osteotomy angle of 34° according to the present invention.

[0028] In the figure: 1, bottom plate, 2, rotating plate, 3, push rod, 4, vertical plate, 5, first screw rod, 6, bone clamp, 601, first bone clamp, 602, second bone clamp, 7, rotating handle, 8, slider, 9, positioning column, 10, fixed seat, 11, guide plate, 12, second slide groove, 13, second screw rod, 14, second slider, 15, support rod, 16, third slide groove, 17, angle ruler, 18, placement plate, 19, guide column, 20, first spring, 21, lifting block, 22, second spring, 23, swing block, 24, pressure plate, 25, punching plate, 26, through hole, 27, rotating shaft, 28, sleeve, 29, sink groove, 30, positioning groove, 31, give way groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-12 The present invention provides a technical solution: an intraoperative tool for correcting adult elbow varus, comprising a base plate 1, a rotating plate 2 is installed at the upper right end of the base plate 1, a placement plate 18 is fixedly connected to the middle part of the upper side of the base plate 1, the placement plate 18 is movably connected to the base plate 1, and the left end extends to the top of the rotating plate 2 to support the patient's arm. Specifically, a plurality of positioning grooves 30 are provided on the upper side of the base plate 1, and the positioning grooves 30 are movably engaged with the top plate arranged on the bottom surface of the placement plate 18, so as to facilitate disassembly and cleaning.

[0031] The two sides of the placement plate 18 and located on the bottom plate 1 are fixedly connected with vertical plates 4, and a plurality of first screw rods 5 are meshedly connected to the vertical plates 4. The inner ends of the first screw rods 5 are rotatably connected to bone clamps 6, and positioning columns 9 are fixedly connected to the clamping surfaces of the bone clamps 6. A sleeve 28 of a certain length extends from the inner wall of the column 4 to stably support and mesh the first screw rods 5, thereby making the supported humerus more stable. The specific bone clamp 6 can be in the form of a combination of a first bone clamp 601 and a second bone clamp 602. The upper side of the second bone clamp 602 is fixedly connected to a slider 8, and the slider 8 is slidably connected to the inside of the first bone clamp 601 (such as Figure 6 As shown in the figure, during the operation, a scalpel is used to cut a 10 cm incision in the humerus to expose the patient's humerus, and multiple holes are drilled on both sides of the humerus. Then, the first screw rod 5 is rotated to shrink the corresponding clamping openings of the first bone clamp 601 and the second bone clamp 602 until the positioning column 9 on the bone clamp 6 is inserted into the hole of the humerus. The humerus is fixed on the device. In order to realize that the rotation of the first screw rod 5 will not drive the bone clamp 6 to rotate, the inner end of the first screw rod 5 is rotatably connected to the first bone clamp 601 or the second bone clamp 602 through a bearing. Of course, other forms of rotatable connection can also be used, such as using a T-shaped protrusion and a T-shaped groove, which can achieve rotatable connection;

[0032] Both sides of the upper surface of the rotating plate 2 are fixedly connected with a fixing seat 10, and two guide plates 11 are rotatably connected to the fixing seat 10. There is a gap between the two guide plates 11 on the same side, and the gap is approximately the thickness of the bone saw blade. In this way, the two guide plates 11 on the same side both hold one end of the bone saw, so that the bone saw can only move along the side wall direction of the guide plate 11, so that the cut wedge-shaped bone is more regular and the angle skew in the left and right directions is prevented. The side wall of the guide plate 11 is provided with a scale, which is a measurement of the length unit (such as Figure 8The second guide plate 11 is provided with a plurality of support rods 15, each of which is provided with a plurality of support rods 15. The plurality of support rods 15 are provided with a plurality of support rods 15, each of which is provided with a plurality of support rods 15. The plurality of support rods 15 are provided with a plurality of support rods 15, each of which is provided with a plurality of support rods 15. The plurality of support rods 15 are provided with a plurality of support rods 15, each of which is provided with a plurality of support rods 15. The plurality of support rods 15 are provided with a plurality of support rods 15, each of which is provided with a plurality of support rods 15.

[0033] Specifically, a guide column 19 is fixedly connected to the inner wall of any guide plate 11 on the same side, and the guide column 19 can make the lifting block 21 slide horizontally only along the direction of the guide plate 11. The lifting block 21 is slidably sleeved on the outer wall of the guide column 19 through a first spring 20. A pressure plate 24 is connected to the inner wall of the lifting block 21. The interior of the lifting block 21 is slidably connected to a swing block 23 through a second spring 22. The inner walls of the two guide plates 11 on the same side are provided with a clearance groove 31 to increase space for the installation of the guide column 19 and the movement of the lifting block 21. The upper surface of the swing block 23 is provided with teeth that match the teeth of the bone saw. The teeth on the lower sides of the two ends of the bone saw will contact and engage with the teeth of the two swing blocks 23 respectively. The bone saw will swing continuously when it moves downward, so when the bone saw is swung The two swing blocks 23 will swing with the bone saw and move downward with the bone saw without interference, so that the lifting block 21 will move downward with the pressure plate 24, and the pressure plate 24 presses the soft tissue downward, so that a certain gap is formed between the patient's soft tissue and the bone saw, avoiding damage to the soft tissue by the bone saw and protecting the surrounding tissue. When the bone saw does not apply pressure to the swing block 23, the lifting block 21 will slide to the top of the guide column 19 through the elastic reset action of the first spring 20, so the pressure plate 24 will no longer press the patient's soft tissue, and the pressure plate 24 and the lifting block 21 are detachably connected, for example, they can be fixed with screws, so that the pressure plate 24 of suitable model and specification can be selected according to the patient's condition, and the pressure plate 24 is an arc-shaped plate with an arc downward.

[0034] In addition, in order to facilitate the implantation of steel nails during surgery, a punching plate 25 is provided on the upper side of the placement plate 18, and the two ends of the punching plate 25 are respectively movably engaged with the sink grooves 29 provided on the two guide plates 11 on both sides. The middle part of the punching plate 25 is provided with a plurality of through holes 26. After closing the osteotomy end, the two ends of the punching plate 25 are placed on the side walls of the guide plate 11, and the osteotomy end is punched through the through holes 26, thereby facilitating the subsequent implantation of the steel plate fixation.

[0035] Specifically, an angle ruler 17 is provided on the outer wall of the fixing seat 10. The angle ruler 17 is used to measure the angle of the guide plate 11. The shape is semicircular, and the midpoint of the angle ruler 17 is 0 degrees. The left side of the middle is positive and the right side is negative. When the guide plate 11 is at the midpoint of the angle ruler 17, its angle is 0 degrees, which makes it easy to quickly adjust the cutting angle.

[0036] In addition, some patients' bones are not straight, or the cutting angle needs to be adjusted longitudinally, that is, the rotating plate 2 and the bottom plate 1 need to be placed in an angled manner, so a rotating shaft 27 is provided on the bottom surface of the rotating plate 2 and is rotated to be inserted into a slot provided on the bottom surface of the bottom plate 1. The inner sides of the bottom plate 1 are meshed and connected with a push rod 3, the right end of the push rod 3 is movably connected to the side wall of the rotating plate 2, and the left end of the push rod 3 passes through the side wall of the bottom plate 1 and extends to the outside thereof. When the two push rods 3 are rotated in different directions, the two push rods 3 will move toward each other on the bottom plate 1. The guide plate 11 is provided with a first screw rod 5 and a second screw rod 13, and the second screw rod 13 is provided with a first screw rod 5 and a second screw rod 13. The guide plate 11 is provided with a first screw rod 5 and a second screw rod 13, and the guide plate 11 is provided with a second screw rod 5 and a second screw rod 13. The guide plate 11 is provided with a first screw rod 5 and a second screw rod 13, and the guide plate 11 is provided with a first ...

[0037] Working principle: The normal elbow valgus angle, also called the carrying angle, is about 20° (e.g. Fig. 9 For example, a patient had a left elbow injury in childhood, which caused the medial humeral condyle to develop slowly, resulting in an elbow varus deformity with an inward varus angle of about 14° (as shown in Figure 2). Fig.10 As shown), according to the difference between the above two angles, the angle of osteotomy planned for the patient is 34°, that is, a wedge-shaped closed osteotomy is performed at a 34° supracondylar osteotomy angle on the left humerus so that the left side reaches the same valgus angle as the right side. The bone saw can be used to perform osteotomy once at the midpoint of the angle scale 17 (i.e., the 0° position) at the guide plate 11, and then the guide plate 11 can be rotated to the left to the position of 34° on the angle scale 17 and then osteotomy can be performed again, so that a wedge-shaped osteotomy with an angle of 34° can be obtained, which is not only convenient but also more accurate in size. ( Fig.11 Shown is an X-ray after surgery with a steel plate applied).

[0038] When in use, the bottom plate 1 is fixed to the operating table with bolts, and then the patient's arm is placed on the placement plate 18. A scalpel is used to cut a 10 cm incision at the humerus to expose the patient's humerus. A plurality of opposite holes are drilled on both sides of the humerus, and then the first screw rod 5 is rotated to shrink the clamping opening of the bone clamp 6 until the positioning column 9 on the bone clamp 6 is inserted into the hole of the humerus, and the humerus is fixed to the device; the top rod 3 is rotated to rotate the rotating plate 2 on the bottom plate 1, so that the angles on both sides of the guide plate 11 can be adjusted, and the guide plate 11 can be fixed on the fixed seat by rotating the second screw rod 13. 10 is rotated, so that the guide plates 11 on both sides are rotated to a certain angle through the angle ruler 17, and then the bone saw will move downward from between the guide plates 11 to perform osteotomy. The two guide plates 11 have a clamping effect on the bone saw, so that the bone saw can only move downward along the gap between the two guide plates 11 without tilting. When performing osteotomy, the bone saw needs to perform osteotomy twice at different angles in order to cut out a wedge-shaped bone block. After the wedge-shaped bone block is taken out, the osteotomy end is closed, and the two ends of the punching plate 25 are placed on the side walls of the guide plate 11. After the osteotomy end is punched through the through hole 26, a steel plate is implanted for fixation.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intraoperative tool for correcting cubitus varus in adults, comprising a base plate (1), characterized in that: A rotating plate (2) is installed at the upper right end of the bottom plate (1), a placement plate (18) is installed at the middle of the upper side of the bottom plate (1), and vertical plates (4) are fixedly connected to both sides of the placement plate (18) and located on the bottom plate (1), and a plurality of first screw rods (5) are meshingly connected to the vertical plates (4), and the inner ends of the first screw rods (5) are rotatably connected to bone clamps (6), and the clamping surfaces of the bone clamps (6) are fixedly connected to positioning columns (9); Both sides of the upper surface of the rotating plate (2) are fixedly connected with a fixing seat (10), and two guide plates (11) are rotatably connected to the fixing seat (10). A second slide groove (12) is opened on the lower side of the fixing seat (10) and located inside the rotating plate (2). A second screw rod (13) is rotatably connected inside the second slide groove (12), and a second slider (14) is meshed on the second screw rod (13). Support rods (15) are fixedly connected at both ends of the second slider (14). The upper end of the support rod (15) is slidably connected to the inside of a third slide groove (16). The third slide groove (16) is opened inside the guide plate (11). Any guide plate (11) on the same side A guide column (19) is fixedly connected to the inner wall of the rotating plate (2); a lifting block (21) is slidably sleeved on the outer wall of the guide column (19) via a first spring (20); a pressure plate (24) is connected to the inner wall of the lifting block (21); a swing block (23) is slidably connected inside the lifting block (21) via a second spring (22); a rotating shaft (27) is provided on the bottom surface of the rotating plate (2) and is rotatably inserted into a slot provided on the bottom surface of the bottom plate (1); push rods (3) are meshedly connected on both sides of the inside of the bottom plate (1); the right end of the push rod (3) is movably connected to the side wall of the rotating plate (2); and the left end of the push rod (3) passes through the side wall of the bottom plate (1) and extends to the outside thereof.

2. The intraoperative tool for correcting adult cubitus varus according to claim 1, characterized in that: The bone clamp (6) comprises a first bone clamp (601) and a second bone clamp (602), and a slider (8) is fixedly connected to the upper side of the second bone clamp (602), and the slider (8) is slidably connected to the inside of the first bone clamp (601).

3. The intraoperative tool for correcting cubitus varus in adults according to claim 2, characterized in that: The first screw rod (5) is meshingly connected to a sleeve (28) fixedly connected to the inner side surface of the vertical plate (4), and the inner end of the first screw rod (5) is rotatably connected to the first bone clamp (601) or the second bone clamp (602) via a bearing.

4. The intraoperative tool for correcting cubitus varus in adults according to claim 3, characterized in that: The outer ends of the push rod (3), the first screw rod (5) and the second screw rod (13) are all fixedly connected to a rotating handle (7).

5. The intraoperative tool for correcting cubitus varus in adults according to claim 1, characterized in that: The outer side wall of the guide plate (11) is provided with scales.

6. The intraoperative tool for correcting cubitus varus in adults according to claim 1, characterized in that: The upper side surface of the swing block (23) is provided with teeth.

7. The intraoperative tool for correcting cubitus varus in adults according to claim 1, characterized in that: An angle ruler (17) is provided on the outer side wall of the fixing seat (10).

8. The intraoperative tool for correcting cubitus varus in adults according to claim 1, characterized in that: The pressing plate (24) and the lifting block (21) are detachably connected, and the pressing plate (24) is an arc-shaped plate with an arc pointing downward.

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