Auxiliary tool for medial tibia high-position osteotomy
By designing an auxiliary tool for medial osteotomy on the medial side of the tibia including a capsule and a fluid-filling component, the problem of uneven opening of the bone suture process in the prior art is solved, and a more stable and safe surgical process is achieved.
Patent Information
- Application Number
- CN202510114569.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-04-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In high osteotomy on the medial side of the tibia, the osteochi structure in the prior art lacks a moving structure, resulting in uneven process of opening the bone suture, which can easily lead to iatrogenic fractures in the joint.
An osteochi is designed including a first chisel plate, a second chisel plate and an expansion assembly. The expansion assembly consists of a capsule body and a liquid-filling member. The capsule body expands during the liquid filling process, providing a limiting effect through the constraint layer to ensure the stability of the expansion process.
Through this design, a uniform and slow expansion process can be achieved, avoiding intra-articular fractures caused by uneven expansion of the bone suture, and improving the stability and safety of the operation.
Smart Images
Figure CN119791772A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of osteotomy auxiliary equipment, and in particular to an auxiliary tool for medial high tibial osteotomy. Background Art
[0002] In the prior art, when performing a high medial tibial osteotomy, after using an oscillating saw to perform osteotomy, at least three osteotome are required to enter the sawed bone joint to open the osteotomy area. Usually, the first osteotome is used to enter the bone joint for preliminary distraction, and then the second osteotome is used to continue to enter the bone joint along the upper surface or lower surface of the first osteotome to further open the osteotomy area. Subsequently, the third osteotome is used to chisel between the first osteotome and the second osteotome to create a larger osteotomy area to provide space for the subsequent entry of a bone distractor, and then the bone distractor is extended into the osteotomy area to complete the final support of the distracted bone joint, waiting for the subsequent fixation and filling steps of the distracted bone joint.
[0003] In the above process, the osteotome structure lacks an active structure and cannot achieve the purpose of gradually expanding the bone joint with only one osteotome. In order to expand a sufficient bone joint space, multiple osteotome must be used to gradually stack them. In order to prevent the osteotomy area from expanding too quickly and causing iatrogenic fractures in the joint, the insertion of each osteotome and the opening of the bone stretcher require the doctor to have a high degree of proficiency and need to be performed stably and extremely slowly. Usually, the entry process of each osteotome and the expansion process of the bone stretcher take several minutes. Therefore, the osteotome in the prior art requires a high level of proficiency for the doctor, and the superposition of multiple osteotome is difficult to achieve a very stable and uniform slow expansion process. If the expansion speed is uneven, it is easy to cause iatrogenic fractures in the joint in the osteotomy area when the expansion speed changes suddenly, causing surgical failure and having a negative impact on the affected area. Summary of the invention
[0004] The purpose of the present invention is to overcome the problems in the prior art and to provide an auxiliary tool for medial high tibial osteotomy, which can avoid iatrogenic fractures in the joint caused by uneven distraction speed.
[0005] The technical solution of the present invention is: an auxiliary tool for high medial tibial osteotomy, including a bone chisel, the bone chisel including: a first chisel plate, a second chisel plate and an expansion component, the first chisel plate having a bone chisel blade at one end in the chiseling direction of the bone chisel, a groove is provided on one side surface of the first chisel plate, a first mounting groove is provided on the bottom surface of the groove, the second chisel plate can be embedded in the groove, the second chisel plate has a second mounting groove on a side facing the first chisel plate, the first mounting groove and the second mounting groove are opposite to each other, the first chisel plate and the second chisel plate are connected at one end away from the bone chisel blade by a connecting component, the expansion component includes: a capsule body and a liquid-filled component, the capsule body is a long strip-shaped strip capsule, the capsule body is folded in a multi-layer folding manner in a cavity formed by the first mounting groove and the second mounting groove, when the second chisel plate is embedded in the groove, the capsule body is compressed and placed in the cavity formed by the first mounting groove and the second mounting groove, and the liquid-filled component is connected to the capsule body to fill the capsule body with liquid.
[0006] Considering that in order to achieve the technical effect of expanding the bone joint evenly as required, the final distance between the second chisel plate and the first chisel plate needs to be equivalent to the stacked height of at least three bone chisels used in the prior art. In the process of gradually filling the capsule from a contracted state to an extreme state, the capsule of a single overall shape has insufficient rigidity before being filled with liquid, but has stronger rigidity after being filled with liquid, resulting in uneven expansion of the distance between the second chisel plate and the first chisel plate during the filling process. Therefore, it is considered to use a capsule of a special shape so that the stability during filling and expansion can be improved while having sufficient height under the extreme state.
[0007] Therefore, in order to solve this technical problem and improve the smoothness of the expansion process, the expansion component optionally further includes two constraint layers, which are fixedly connected between the inner bottom surface of the lower mounting groove and the inner bottom surface of the upper mounting groove, and the two constraint layers are located on both sides of the capsule in the width direction of the bone chisel. When the upper chisel plate is embedded in the groove, the constraint layer is in a wrinkled and folded state. When the capsule is filled with liquid and expands, the two sides of the chisel in the width direction of the bone chisel are against the constraint layer.
[0008] Optionally, the liquid-filled component includes: a tube body and a pump body, wherein one end of the tube body facing the osteotome blade is connected to the sac body, and the pump body is connected to the other end of the tube body.
[0009] Through the above arrangement, as the second chisel plate and the first chisel plate are gradually stretched apart, the distance between them becomes larger, and the bladder will tend to expand toward the gap between the second chisel plate and the first chisel plate on the left and right sides under the action of pressure, and the constraint layer provides a limiting effect on both sides for the bladder, and because the constraint layer is stored in a wrinkled and folded state in the groove, as the second chisel plate and the first chisel plate are gradually stretched apart, the constraint layer is gradually stretched and expanded, and its limiting effect on the bladder is gradually enhanced, which is in line with the trend of the bladder gradually expanding outward, thereby reducing the degree of outward expansion of the bladder and improving the smoothness of the stretching process.
[0010] Considering that during the expansion process of the balloon, as the second chisel plate and the first chisel plate are gradually stretched apart, the distance between them increases, and the upper and lower pressure loads brought by the bone joints also gradually increase. Under the action of this gradually increasing load, due to the elasticity of the balloon and the state of continuous liquid filling, the balloon will expand under pressure toward the gap between the second chisel plate and the first chisel plate on the left and right sides, thereby changing the expansion rate of the balloon in the upper and lower directions, that is, changing the expansion rate of the second chisel plate and the first chisel plate, thereby affecting the smoothness of the stretching process.
[0011] In order to solve the technical problem and improve the stability of the expansion process, further, a first pipeline groove is provided on the bottom surface of the groove, the first pipeline groove is parallel to the direction of bone chisel insertion, one end of the first pipeline groove facing the bone chisel blade is connected to the first installation groove, and the other end of the first pipeline groove is located on the end surface of the first chisel plate away from the bone chisel blade, and a second pipeline groove is provided on the side of the second chisel plate facing the first chisel plate, the second pipeline groove is parallel to the direction of bone chisel insertion, the second pipeline groove and the first pipeline groove are opposite to each other, one end of the second pipeline groove facing the bone chisel blade is connected to the second installation groove, and the other end of the second pipeline groove is located on the end surface of the second chisel plate away from the bone chisel blade, when the second chisel plate is embedded in the groove, the tube body is embedded in the first pipeline groove and the second pipeline groove. Through this design, the tube body is accommodated between the second pipeline groove and the first pipeline groove, is not compressed, and its liquid delivery process remains unobstructed, thereby avoiding the phenomenon of changes in delivery efficiency generated in the initial expansion stage and maintaining the stability of the expansion process.
[0012] Considering that the bladder has a certain rigidity even after being filled with liquid, it still retains elastic deformation ability, and the pressure of the bone joint on the second chisel plate and the first chisel plate is concentrated at one end of the bone joint, rather than acting evenly on the bladder, its pressure load will cause the front end of the bladder to be compressed and deformed, while the rear end will expand to a greater extent, which is not conducive to the opening of the bone joint. In order to overcome this defect, further, the number of the second pipeline groove, the first pipeline groove, the second mounting groove, and the first mounting groove are all two, the two second mounting grooves and the two first mounting grooves are arranged along the direction of the bone chisel, the number of expansion components is two, and each expansion component corresponds to a second pipeline groove, a first pipeline groove, a second mounting groove, and a first mounting groove, wherein the bladder in the expansion component far away from the bone chisel blade is the first bladder, and the bladder in the expansion component close to the bone chisel blade is the second bladder, and the maximum volume of the first bladder after being filled with liquid and expanded is greater than that of the second bladder.
[0013] Optionally, the connecting assembly includes: a first connecting rod, a first slider, a second connecting rod, a second slider and a connecting handle, one end of the first connecting rod is hinged to an end of the second chisel plate away from the bone chisel blade, and the hinge axes of the two are parallel to the second chisel plate and perpendicular to the chiseling direction of the bone chisel, the first slider is hinged to the other end of the first connecting rod, and the hinge axes of the two are parallel to the second chisel plate and perpendicular to the chiseling direction of the bone chisel, one end of the second connecting rod is hinged to an end of the first chisel plate away from the bone chisel blade, and the hinge axes of the two are parallel to the first chisel plate and perpendicular to the chiseling direction of the bone chisel, the second slider is hinged to the other end of the second connecting rod, and the hinge axes of the two are parallel to the first chisel plate and perpendicular to the chiseling direction of the bone chisel, the length direction of the connecting handle coincides with the chiseling direction of the bone chisel, the first slider and the second slider are both slidably connected to the connecting handle, and the sliding directions are parallel to the chiseling direction of the bone chisel.
[0014] Furthermore, a first slide groove parallel to the length direction of the connecting handle is opened at the upper part of the connecting handle, and a second slide groove parallel to the length direction of the connecting handle is opened at the lower part of the connecting handle. The first slider is slidably connected in the first slide groove, the second slider is slidably connected in the second slide groove, and the tube body passes through the connecting handle.
[0015] Furthermore, it also includes a rigid pipe section, which is fixedly connected to the inner wall of the second mounting groove or the first mounting groove away from the bone chisel blade, the upper end of the rigid pipe section is connected to the pipe body, and the lower end of the rigid pipe section is connected to the capsule body.
[0016] Furthermore, it includes a control component, the pump body is an electromagnetic pump, and the control component is connected to the pump body to control the start / stop of the pump body and control the pump body to pump liquid into the pipe body at a set rate.
[0017] Furthermore, it also includes a flow meter, which is connected between the pump body and the pipe body.
[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the upper chisel plate is kept in a state of being embedded in the groove, and the osteotome is slowly inserted into the bone joint of the osteotomy area. At this time, unlike the prior art in which two osteotome are inserted and a bone supporter is used to support the bone joint, the liquid filling component is started to allow the liquid to enter the capsule at a slow speed. During the process in which the capsule is gradually filled with the liquid, the capsule originally received in the upper pipeline groove and the lower pipeline groove begins to expand, so that the upper chisel plate and the lower chisel plate are gradually separated from each other and pressed against the upper and lower bone sections in the bone joint, thereby gradually supporting the osteotomy area. In this process, the cumbersome and difficult-to-control multiple osteotome embedding and bone support operations in the prior art are not required, and the present invention can be realized by The pump body and the bladder body gradually expand the osteotomy area at a uniform and slow speed that is difficult to achieve by human power, thereby achieving a beneficial effect and avoiding iatrogenic fractures in the joint caused by uneven bone joint expansion speed. In addition, the bladder body is designed as a long strip-shaped strip bladder, and is folded in a multi-layer folding manner in a chamber formed by the first mounting groove and the second mounting groove. In this way, the bladder body is already against the upper chisel plate and the lower chisel plate when it is not filled with liquid. As the liquid is filled, the distance between the upper chisel plate and the lower chisel plate can be immediately expanded, and the expansion height of each layer after filling with liquid is only the maximum expansion thickness of a single-layer bladder body. Therefore, after a layer of bladder body is filled with liquid, the bladder body of this layer has the highest support stiffness, thereby improving the stability of the bladder body when it is filled with liquid. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A side cross-sectional view of the medial high tibial osteotomy auxiliary tool provided by an embodiment of the present invention when no distraction operation is performed;
[0020] Figure 2 A side cross-sectional view of the medial high tibial osteotomy auxiliary tool provided by an embodiment of the present invention during a preliminary distraction operation;
[0021] Figure 3 A side cross-sectional view of the medial high tibial osteotomy auxiliary tool provided by an embodiment of the present invention when completing a distraction operation;
[0022] Figure 4 A top view of a partial structure of a medial high tibial osteotomy auxiliary tool provided by an embodiment of the present invention;
[0023] Figure 5 A front cross-sectional view of the detailed structure of the medial high tibial osteotomy auxiliary tool provided by an embodiment of the present invention when no distraction operation is performed;
[0024] Figure 6 A front cross-sectional view of the detailed structure of the medial high tibial osteotomy auxiliary tool provided by an embodiment of the present invention when completing the distraction operation;
[0025] Figure 7A side cross-sectional view of the detailed structure of the medial high tibial osteotomy auxiliary tool provided by an embodiment of the present invention during a distraction operation.
[0026] Description of reference numerals:
[0027] 1. First chisel plate; 11. First mounting groove; 12. First pipeline groove; 13. Bone chisel blade; 2. Second chisel plate; 21. Second mounting groove; 22. Second pipeline groove; 3. Capsule; 4. Tube body; 5. Constraint layer; 61. First connecting rod; 62. First slider; 63. Second connecting rod; 64. Second slider; 7. Connecting handle; 8. Rigid pipe section. DETAILED DESCRIPTION
[0028] The specific implementation of the present invention is described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific implementation. 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.
[0029] The present invention provides an auxiliary tool for medial high tibial osteotomy, including a bone chisel, wherein the bone chisel includes: a bone chisel, the bone chisel includes: a first chisel plate 1, a second chisel plate 2 and an expansion component, the first chisel plate 1 has a bone chisel blade 13 at one end in the chiseling direction of the bone chisel, a groove is provided on one side surface of the first chisel plate 1, a first mounting groove 11 is provided on the bottom surface of the groove, the second chisel plate 2 can be embedded in the groove, the second chisel plate 2 is provided with a second mounting groove 21 on a side facing the first chisel plate 1, the first mounting groove 11 and the second mounting groove 21 are provided, and the first mounting groove 11 and the second mounting groove 21 are provided on the side facing the first chisel plate 1. The grooves 21 are opposite to each other, and the ends of the first chisel plate 1 and the second chisel plate 2 away from the bone chisel blade 13 are connected by a connecting component. The expansion component includes: a sac 3 and a liquid-filled component. The sac 3 is a long strip-shaped strip sac. The sac 3 is folded in a multi-layer folding manner in a cavity formed by the first mounting groove 11 and the second mounting groove 21. When the second chisel plate 2 is embedded in the groove, the sac 3 is received in a compressed state in the cavity formed by the first mounting groove 11 and the second mounting groove 21. The liquid-filled component is connected to the sac 3 to fill the sac 3 with liquid.
[0030] Considering that during the expansion process of the bladder 3, as the second chisel plate 1 and the first chisel plate 2 are gradually stretched apart, the distance between the two increases, and the upper and lower pressure loads brought by the bone joints also gradually increase. Under the action of this gradually increasing load, due to the elasticity of the bladder 3 and the state of continuous filling of liquid, the bladder 3 will expand toward the gap between the second chisel plate 1 and the first chisel plate 2 on the left and right sides under the action of pressure, thereby changing the expansion rate of the bladder 3 in the upper and lower directions, that is, changing the expansion rate of the second chisel plate 1 and the first chisel plate 2, thereby affecting the smoothness of the expansion process. In order to solve this technical problem and improve the smoothness of the expansion process, the expansion component further includes: two constraint layers 5, fixedly connected between the inner bottom surface of the first mounting groove 11 and the inner bottom surface of the second mounting groove 21, and the two constraint layers 5 are located on both sides of the bladder 3 in the width direction of the bone chisel. When the second chisel plate 2 is embedded in the groove, the constraint layer 5 is in a wrinkled and folded state. When the bladder 3 is filled with liquid and expanded, the two sides of the bladder 3 in the width direction of the bone chisel are against the constraint layer 5.
[0031] Furthermore, considering that in order to achieve the technical effect of expanding the bone joint evenly as required, the final spacing between the second chisel plate 1 and the first chisel plate 2 needs to be equivalent to the stacked height of at least three bone chisels used in the prior art, in the process of gradually filling the capsule 3 from the contracted state to the limit state, the capsule 3 of a single overall shape has insufficient rigidity before being filled with liquid, and has stronger rigidity after being filled with liquid, resulting in uneven expansion of the spacing between the second chisel plate 1 and the first chisel plate 2 during the filling process. Therefore, it is considered to use a special form of capsule 3 so that the stability during filling and expansion can be improved while having sufficient height under the limit state.
[0032] Specifically, the capsule body 3 is a long strip-shaped strip capsule, and the capsule body 3 is folded in a multi-layer folding manner in a cavity formed by combining the first installation groove 11 and the second installation groove 21 .
[0033] With the above settings, Figure 1 and Figure 7 As shown, when the bladder 3 is not filled with liquid, it has already pressed against the second chisel plate 1 and the first chisel plate 2. As the liquid is filled, the distance between the second chisel plate 1 and the first chisel plate 2 can be immediately expanded, and the expansion height of each layer after filling with liquid is only the maximum expansion thickness of the single-layer bladder 3. Therefore, after a layer of bladder 3 is filled with liquid, the bladder 3 of this layer has the highest support stiffness, thereby improving the stability of the bladder 3 when it is filled with liquid and expanded. In order to further ensure uniform and stable filling of liquid, that is, to achieve the purpose of stable expansion, a one-way diaphragm can be set at each folding position of the bladder 3. In this way, as the liquid is gradually filled and reaches a folding position, the liquid pressure pushes the one-way diaphragm to open and allow the liquid to enter the previous folding cavity. It should be noted that the one-way diaphragm can only be opened in one direction when the liquid in a single folding cavity is full.
[0034] Specifically, Figures 1 to 7 As shown, during the distraction operation, the second chisel plate 2 is kept in the state of being embedded in the groove, and the chisel blade 13 is directed toward the bone joint in the osteotomy area, and the chisel is slowly inserted into the bone joint in the osteotomy area along the bone chiseling direction. At this time, unlike the prior art of inserting two more chisels and using a bone spreader to distract the bone joint, the pump body is started to allow the liquid to pass through the tube body 4 at a slow speed and then enter the capsule 3. During the process of the capsule 3 being gradually filled with liquid, the capsule 3 originally received in the first mounting groove 11 and the second mounting groove 21 begins to expand, so that the second chisel plate 2 and the first chisel plate 1 are gradually separated from each other and pressed against the upper and lower bone sections in the bone joint, thereby gradually distracting the osteotomy area. As the second chisel plate and the first chisel plate are gradually distracted, the distance between them becomes larger, and the capsule will move upward under the action of pressure. The constraint layer provides a limiting effect on both sides of the capsule, and because the constraint layer is received in a wrinkled and folded state in the groove, as the second chisel plate and the first chisel plate are gradually stretched open, the constraint layer is gradually stretched and expanded, and the limiting effect on the capsule is gradually enhanced, which is in line with the trend of the capsule gradually expanding outward, thereby reducing the degree of outward expansion of the capsule and improving the smoothness of the expansion process. In this process, there is no need for the cumbersome and difficult to control multi-bone chisel embedding and bone expansion operation in the prior art, and the osteotomy area can be gradually expanded at a uniform and slow speed that is difficult to achieve by manpower through the pump body and the capsule 3, thereby achieving a beneficial effect and avoiding iatrogenic fractures in the joint caused by uneven bone suture expansion speed.
[0035] In another embodiment, the capsule cavity 3 may also be configured to include a plurality of single-layer sub-capsule cavities stacked up and down, and adjacent sub-capsule cavities are connected by connecting tubes, which can also achieve similar technical effects.
[0036] Optionally, the liquid-filled component includes: a tube body 4 and a pump body, wherein one end of the tube body 4 facing the osteotome blade 13 is connected to the sac body 3, and the pump body is connected to the other end of the tube body 4, and the liquid enters the sac cavity 3 through the tube body 4 by opening the pump body.
[0037] After accepting the above settings, this embodiment improves the stability during expansion to a certain extent. However, observing the expansion process in this embodiment from a more microscopic perspective, it can be found that if the folding direction of the capsule is not set along the direction perpendicular to the bone chisel insertion direction, for example, when the folding direction of the capsule is parallel to the bone chisel insertion direction, as the single-layer capsule is filled with liquid, the expansion of the capsule will gradually develop from one side of the bone chisel to the other side, so that the second chisel plate and the first chisel plate first form a rotational motion with the side as the axis, rather than a forward and backward rotation perpendicular to the bone chisel insertion direction, which will cause the second chisel plate and the first chisel plate to sway left and right, affecting the stability during the expansion process.
[0038] Therefore, in order to solve this technical problem and improve the stability of the expansion process, further, when the capsule 3 is folded in a multi-layer folding manner in the chamber formed by the first installation groove 11 and the second installation groove 21, the length direction of each layer of the capsule 3 in the folding is parallel to the chiseling direction of the bone chisel. Through this arrangement, when the capsule 3 is filled with liquid, the second chisel plate 1 and the first chisel plate 2 will only rotate in the front-to-back direction, which will not affect the expansion process of the bone joint.
[0039] Since the uniformity and stability of the expansion of the sac 3 depends on the uniformity and stability of the liquid transmitted by the tube 4, and through the analysis of the initial expansion process of the sac 3, when the second chisel plate 1 and the first chisel plate 2 are embedded in the bone gap, an initial pressure load will be given to the sac 3 and the tube 4. At this time, the tube 4 is compressed and its liquid transportation efficiency is low. As the sac 3 expands, the second chisel plate 1 and the first chisel plate 2 gradually separate, the compressed state of the tube 4 is gradually released, and its liquid transportation efficiency is improved, which affects the expansion rate of the sac 3. In extreme cases, rapid expansion will occur, which will have a dangerous impact on the support expansion process.
[0040] In order to solve this technical problem and improve the smoothness of the distraction process, further, a first pipeline groove 12 is provided on the bottom surface of the groove, and the first pipeline groove 12 is parallel to the chiseling direction of the bone chisel. One end of the first pipeline groove 12 facing the bone chisel blade 13 is connected to the first mounting groove 11, and the other end of the first pipeline groove 12 is located on the end surface of the first chisel plate 1 away from the bone chisel blade 13. A second pipeline groove 22 is also provided on the side of the second chisel plate 2 facing the first chisel plate 1, and the second pipeline groove 22 is parallel to the chiseling direction of the bone chisel. The second pipeline groove 22 and the first pipeline groove 12 are opposite to each other, and one end of the second pipeline groove 22 facing the bone chisel blade 13 is connected to the second mounting groove 21, and the other end of the second pipeline groove 22 is located on the end surface of the second chisel plate 2 away from the bone chisel blade 13. When the second chisel plate 2 is embedded in the groove, the tube body 4 is embedded in the first pipeline groove 12 and the second pipeline groove 22. With this design, the tube body 4 is accommodated between the second pipeline groove 22 and the first pipeline groove 12 without being compressed, and the liquid delivery process remains unobstructed, thereby avoiding the phenomenon of changes in delivery efficiency in the initial expansion stage and maintaining the smoothness of the expansion process.
[0041] Considering that the bladder 3 has a certain rigidity even after the filling is completed, it still retains elastic deformation ability, and the pressure of the bone joint on the second chisel plate 1 and the first chisel plate 2 is concentrated at one end of the bone joint, rather than acting evenly on the bladder 3, its pressure load will cause the front end of the bladder 3 to be compressed and deformed, while the rear end expands to a greater extent, which is not conducive to the opening of the bone joint. In order to overcome this defect, further, the number of the second pipeline groove 22, the first pipeline groove 12, the second mounting groove 21, and the first mounting groove 11 are all two, the two second mounting grooves 21 and the two first mounting grooves 11 are arranged along the bone chisel insertion direction, the number of expansion components is two, and each expansion component corresponds to a second pipeline groove 22, a first pipeline groove 12, a second mounting groove 21, and a first mounting groove 11, wherein the bladder 3 in the expansion component far away from the bone chisel blade 13 is the first bladder, and the bladder 3 in the expansion component close to the bone chisel blade 13 is the second bladder, and the maximum volume of the first bladder after filling and expanding is greater than that of the second bladder. Through the above arrangement, two bladders 3 are used to support and expand the second chisel plate 1 and the first chisel plate 2, thereby improving the above technical defects.
[0042] Furthermore, the connecting assembly includes: a first connecting rod 61, one end of which is hinged to the end of the second chisel plate 2 away from the bone chisel blade 13, and the hinge axis of the two is parallel to the second chisel plate 2 and perpendicular to the chiseling direction of the bone chisel; a first sliding block 62, which is hinged to the other end of the first connecting rod 61, and the hinge axis of the two is parallel to the second chisel plate 2 and perpendicular to the chiseling direction of the bone chisel; a second connecting rod 63, one end of which is hinged to the end of the first chisel plate 1 away from the bone chisel blade 13, and the hinge axis of the two is parallel to the first chisel plate 1 and perpendicular to the chisel direction of the bone chisel; a second sliding block 64, which is hinged to the other end of the second connecting rod 63, and the hinge axis of the two is parallel to the first chisel plate 1 and perpendicular to the chisel direction of the bone chisel; a connecting handle 7, the length direction of which coincides with the chisel direction of the bone chisel, the first sliding block 62 and the second sliding block 64 are both slidably connected to the connecting handle 7, and the sliding direction is parallel to the chisel direction of the bone chisel. Through the above arrangement, the second chisel plate 1 and the first chisel plate 2 can move along the chiseling direction and in the height direction during the expansion support process, and a fixed base, namely the connecting handle 7, is provided to prevent the second chisel plate 1 and the first chisel plate 2 from deviating in the horizontal direction.
[0043] Furthermore, a first slide groove parallel to the length direction of the connecting handle 7 is opened at the upper part of the connecting handle 7, and a second slide groove parallel to the length direction of the connecting handle 7 is opened at the lower part of the connecting handle 7. The first slider 62 is slidably connected in the first slide groove, and the second slider 64 is slidably connected in the second slide groove, and the tube body 4 passes through the connecting handle 7.
[0044] Furthermore, it also includes a rigid pipe section 8, which is fixedly connected to the inner wall of the second mounting groove 21 or the first mounting groove 11 away from the bone chisel blade 13, the upper end of the rigid pipe section 8 is connected to the tube body 4, and the lower end of the rigid pipe section 8 is connected to the capsule 3.
[0045] Furthermore, a control component is included, the pump body is an electromagnetic pump, and the control component is connected to the pump body to control the start / stop of the pump body and control the pump body to inject liquid into the tube body 4 at a set rate.
[0046] Furthermore, a flow meter is included, and the flow meter is connected between the pump body and the pipe body 4.
[0047] 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 can be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A tool for assisting medial high tibial osteotomy, comprising an osteotome, characterized in that: The osteotome comprises: A first chisel plate (1) having a bone chisel blade (13) at one end in the chiseling direction of the bone chisel, a groove being provided on one side surface of the first chisel plate (1), and a first mounting groove (11) being provided on the bottom surface of the groove; A second chisel plate (2) is capable of being inserted into the groove, a second installation groove (21) is provided on a side of the second chisel plate (2) facing the first chisel plate (1), the first installation groove (11) and the second installation groove (21) are opposite to each other, and the first chisel plate (1) and the second chisel plate (2) are connected at one end away from the bone chisel blade (13) via a connecting assembly; The expansion assembly comprises: a sac (3) and a liquid-filling component, wherein the sac (3) is a long strip-shaped strip sac, and the sac (3) is folded in a multi-layer folding manner in a chamber formed by combining a first mounting groove (11) and a second mounting groove (21). When the second chisel plate (2) is embedded in the groove, the sac (3) is received in a compressed state in the chamber formed by combining the first mounting groove (11) and the second mounting groove (21), and the liquid-filling component is connected to the sac (3) to fill the sac (3) with liquid.
2. A medial high tibial osteotomy auxiliary tool as claimed in claim 1, characterized in that: The expansion assembly further comprises two constraint layers (5), the two constraint layers (5) being fixedly connected between opposite side walls of the first mounting groove (11) and the second mounting groove (21), and the two constraint layers (5) being located on both sides of the capsule (3) in the width direction of the bone chisel, and when the second chisel plate (2) is engaged in the groove, the constraint layers (5) are in a wrinkled and folded state, and when the capsule (3) is filled with liquid to expand, the capsule (3) is abutted against the constraint layers (5) on both sides in the width direction of the bone chisel.
3. A medial high tibial osteotomy auxiliary tool as claimed in claim 2, characterized in that: The liquid-filled component comprises: a tube body (4) and a pump body, wherein one end of the tube body (4) facing the bone chisel blade (13) is connected to the capsule body (3), and the pump body is connected to the other end of the tube body (4).
4. A medial high tibial osteotomy auxiliary tool as claimed in claim 3, characterized in that: A first pipeline groove (12) is also provided on the bottom surface of the groove, the first pipeline groove (12) is parallel to the direction of the bone chisel, one end of the first pipeline groove (12) facing the bone chisel blade (13) is connected to the first installation groove (11), the other end of the first pipeline groove (12) is located on an end surface of the first chisel plate (1) away from the bone chisel blade (13), and a second pipeline groove (22) is also provided on the side of the second chisel plate (2) facing the first chisel plate (1), the second pipeline groove The second pipeline groove (22) is parallel to the bone chisel cutting direction, the second pipeline groove (22) and the first pipeline groove (12) are opposite to each other, one end of the second pipeline groove (22) facing the bone chisel blade (13) is connected to the second installation groove (21), and the other end of the second pipeline groove (22) is located on the end surface of the second chisel plate (2) away from the bone chisel blade (13), and when the second chisel plate (2) is embedded in the groove, the tube body (4) is embedded in the first pipeline groove (12) and the second pipeline groove (22).
5. The tool for assisting medial high tibial osteotomy according to claim 4, characterized in that: The number of the second pipeline groove (22), the first pipeline groove (12), the second installation groove (21), and the first installation groove (11) are all two, and the two second installation grooves (21) and the two first installation grooves (11) are arranged along the bone chisel insertion direction. The number of the expansion components is two, and each expansion component corresponds to a second pipeline groove (22), a first pipeline groove (12), a second installation groove (21), and a first installation groove (11), wherein the capsule (3) in the expansion component far from the bone chisel blade (13) is the first capsule, and the capsule (3) in the expansion component close to the bone chisel blade (13) is the second capsule, and the maximum volume of the first capsule after being filled with liquid and expanded is greater than that of the second capsule.
6. The tool for assisting medial high tibial osteotomy according to claim 3, characterized in that: The connection component comprises: A first connecting rod (61), one end of which is hinged to an end of the second chisel plate (2) away from the bone chisel blade (13), and the hinge axis of the two is parallel to the second chisel plate (2) and perpendicular to the chiseling direction of the bone chisel; A first sliding block (62) is hinged to the other end of the first connecting rod (61), and the hinge axis of the two is parallel to the second chisel plate (2) and perpendicular to the chiseling direction of the bone chisel; A second connecting rod (63) has one end hinged to an end of the first chisel plate (1) away from the bone chisel blade (13), and the hinge axis of the two is parallel to the first chisel plate (1) and perpendicular to the chiseling direction of the bone chisel; A second sliding block (64) is hinged to the other end of the second connecting rod (63), and the hinge axis of the two is parallel to the first chisel plate (1) and perpendicular to the chiseling direction of the bone chisel; The length direction of the connecting handle (7) coincides with the chiseling direction of the bone chisel. The first sliding block (62) and the second sliding block (64) are both slidably connected to the connecting handle (7), and the sliding direction is parallel to the chiseling direction of the bone chisel.
7. The tool for assisting medial high tibial osteotomy according to claim 6, characterized in that: The upper part of the connecting handle (7) is provided with a first sliding groove parallel to the length direction of the connecting handle (7), and the lower part of the connecting handle (7) is provided with a second sliding groove parallel to the length direction of the connecting handle (7). The first sliding block (62) is slidably connected in the first sliding groove, and the second sliding block (64) is slidably connected in the second sliding groove. The tube body (4) passes through the connecting handle (7).
8. The tool for assisting medial high tibial osteotomy according to claim 1, characterized in that: The invention also comprises a rigid pipe section (8), which is fixedly connected to the inner wall of the second mounting groove (21) or the first mounting groove (11) away from the bone chisel blade (13), the upper end of the rigid pipe section (8) being connected to the pipe body (4), and the lower end of the rigid pipe section (8) being connected to the capsule body (3).
9. The tool for assisting medial high tibial osteotomy according to claim 3, characterized in that: It comprises a control component, the pump body is an electromagnetic pump, and the control component is connected to the pump body to control the pump body to start or shut down and control the pump body to pump liquid into the pipe body (4) at a set rate.
10. The tool for assisting medial high tibial osteotomy according to claim 9, characterized in that: It also comprises a flow meter, which is connected between the pump body and the pipe body (4).