CN211270993U

CN211270993U - Osteotomy positioning device

Info

Publication number: CN211270993U
Application number: CN201921274072.XU
Authority: CN
Inventors: 张娟; 胡方遒; 孙延东; 翁资欣
Original assignee: Suzhou Microport Orthorecon Co Ltd
Current assignee: Suzhou Microport Orthorecon Co Ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-08-18
Anticipated expiration: 2029-08-07

Abstract

The utility model relates to a cut bone positioner, include: the upper end of the intramedullary positioning rod is provided with a bone cutting fixing seat; the osteotomy plate is arranged on the osteotomy fixing seat and used for positioning the osteotomy position of the tibial plateau; the first adjusting mechanism is arranged between the extramedullary positioning rod and the osteotomy fixing seat and is used for adjusting the distance between the osteotomy fixing seat and the upper end of the extramedullary positioning rod; the ankle embracing device is arranged at the lower part of the extramedullary positioning rod and used for wrapping and fixing ankle joints; and the second adjusting mechanism is arranged on the extramedullary positioning rod and is used for adjusting the length of the extramedullary positioning rod. The utility model does not need to be fixed by fixing nails on the tibial plateau, thus reducing the damage to the bone of the patient; the position of the osteotomy plate can be quickly and accurately adjusted to adjust the osteotomy error, so that the implementation efficiency of the surgical operation is improved; the fixing function of the extramedullary positioning rod and the ankle holding device can be utilized to assist in fixing the osteotomy plate in real time, the adequate stability of the position of the osteotomy plate in the osteotomy operation process is ensured, and the accuracy of the osteotomy operation is improved.

Description

Osteotomy positioning device

Technical Field

The utility model relates to the field of medical equipment, especially, relate to osteotomy positioner.

Background

The proximal tibial osteotomy is one of the most important steps in the total knee replacement surgery, and the anatomical structures and the degree of wear of the articular surfaces of different patients are different, so that the accurate osteotomy positioning by the tibial osteotomy tool is very important for the proximal tibial osteotomy.

Currently, tools for tibial osteotomy positioning are divided into intramedullary and extramedullary positioning. The intramedullary positioning requires inserting a positioning rod into the marrow cavity of the tibia, and although the positioning rod can be positioned through the natural anatomical features of the human body, the defects of large trauma and much bleeding exist, and the positioning rod cannot be used by patients with tibial developmental deformity, so the positioning rod is less and less used clinically. The extramedullary positioning is to determine the centers of the tibial tubercle and the ankle joint through an extramedullary rod to complete positioning, and the judgment mostly depends on visual inspection and empirical judgment, so that errors are easy to occur; simultaneously, the marrow outer positioning tool is penetrated into and is fixed on the tibial plateau through the staple on the marrow outer pole mostly to current shin bone, but this mode not only can cause the damage to patient's sclerotin, and lead to shin bone to cut the bone module skew and produce the osteotomy error easily at the in-process of strikeing, arouse postoperative complication then, although there are adjustment mechanism in order to adjust the osteotomy error to be provided with on some instruments at present, but the governing speed is slow, unable quick fixation, the doctor need carry out loaded down with trivial details regulation operation when moving the osteotomy board to certain position fast in the art, greatly reduced operation efficiency. In addition, the intramedullary tibia osteotomy positioning tool and the tibia osteotomy positioning tool with the nail are used for positioning or fixing a positioning rod or a positioning nail in the tibia, so the tool needs to be taken out before the formal tibia osteotomy operation, the positioning tool loses the function of assisting in fixing the tibia osteotomy plate in the tibia osteotomy process, the position of the tibia osteotomy plate is unstable during the osteotomy operation, the operation effect is directly influenced once the tibia osteotomy plate is deviated and loosened, and even the operation fails, so that great pain is brought to a patient.

SUMMERY OF THE UTILITY MODEL

Therefore, the osteotomy positioning device is needed to solve the problems that bone is easy to damage during osteotomy positioning, osteotomy errors are not easy to adjust, and an osteotomy plate is unstable in fixation during osteotomy.

An osteotomy positioning device, comprising:

the upper end of the intramedullary positioning rod is provided with a bone cutting fixing seat;

the osteotomy plate is arranged on the osteotomy fixing seat and is used for positioning the osteotomy position of the tibial plateau;

the first adjusting mechanism is arranged between the extramedullary positioning rod and the osteotomy fixing seat and is used for adjusting the distance between the osteotomy fixing seat and the upper end of the extramedullary positioning rod;

and the ankle holding device is arranged at the lower part of the extramedullary positioning rod and is used for wrapping and fixing ankle joints.

When in use, the utility model is integrally and vertically arranged in front of the shin bone of the leg of a patient, so that the back side of the osteotomy plate faces and is close to the shin bone; placing the ankle part of a patient in an ankle holding device to wrap and fix the ankle joint by using the ankle holding device, and enabling an osteotomy plate at the upper end of the extramedullary positioning rod to be approximately positioned at a position close to the top of the tibia; measuring the height of the osteotomy platform, and then adjusting the first adjusting mechanism to change the distance between the osteotomy fixing seat and the upper end of the extramedullary positioning rod until the osteotomy groove on the surface of the osteotomy plate installed on the osteotomy fixing seat is aligned with the osteotomy platform, thus locking the osteotomy position of the tibial platform; in the cutting process, the bone cutting groove on the surface of the bone cutting plate has a guiding function on the bone saw and can limit the moving area of the bone saw, so that the bone saw is always in the correct cutting position.

The osteotomy positioning device has at least the following beneficial technical effects:

(1) the utility model has simple design structure, low cost of contained parts and high production and assembly efficiency;

(2) compared with the method for directly driving the positioning rod or the positioning nail into the tibia for positioning or fixing in the prior art, the fixing nail does not need to be driven on the tibia platform for fixing, so that the damage to the bone of a patient is reduced, the deviation of the osteotomy block caused by knocking the fixing nail is fundamentally avoided, and the osteotomy position is more accurate;

(3) the problem of extramedullary location inaccuracy is solved to the adjustment mechanism who cooperates the setting. Firstly, the osteotomy plate at the upper end of the extramedullary positioning rod is positioned at a position close to the top of the tibia, and then the first adjusting mechanism is operated in a matching way to finely adjust the distance between the osteotomy fixing seat and the upper end of the extramedullary positioning rod, so that the position of the osteotomy plate can be quickly and accurately adjusted to adjust osteotomy errors, and the probability of postoperative complications caused by inaccurate osteotomy is effectively reduced; the adjustment process is convenient for the operation of a doctor, the osteotomy plate can be quickly moved to a required position, and the implementation efficiency of the operation is improved; further regulation form can freely switch between fine adjustment or quick adjustment, can reach the purpose of quick adjustment and accurate regulation simultaneously, satisfies multiple user demand.

(4) Compare in prior art, this device need not squeeze into the shin bone with locating lever or location nail and fix a position or fix, so need not take out positioning tool from the shin bone before the official operation of cutting the bone, before cutting the bone and after the utility model discloses all link together with the osteotomy board to can utilize extramedullary locating lever and the fixed effect of embracing the ankle ware to assist fixed osteotomy board in real time in the operation, guarantee to cut the position of osteotomy board enough stable among the operation process, the osteotomy board can not squint or become flexible, has effectively improved the degree of accuracy of the operation of cutting the bone and the probability of the operation success.

In one embodiment, the intramedullary rod further comprises a second adjusting mechanism arranged on the extramedullary positioning rod and used for adjusting the length of the extramedullary positioning rod.

In one embodiment, the first adjustment mechanism comprises:

one end of the guide rod is fixed at the lower part of the osteotomy fixing seat, and the other end of the guide rod is inserted into the anti-rotation structure on the extramedullary positioning rod;

the rotary sleeve is sleeved on the extramedullary positioning rod in a spiral fit mode, and the upper end of the rotary sleeve is rotatably connected with the osteotomy fixing seat.

In one embodiment, the anti-gyration structure comprises:

the accommodating cavity is formed downwards from the upper end face of the extramedullary positioning rod along the axial direction of the extramedullary positioning rod and is used for accommodating the guide rod;

the rod body of the extramedullary positioning rod extends along the axial direction of the extramedullary positioning rod and is communicated with the accommodating cavity;

and the limiting pin penetrates through the limiting groove from the outside and is inserted into the guide rod in the accommodating cavity.

In one embodiment, a plurality of pin holes are circumferentially formed in one end of the rotating sleeve, which is connected with the osteotomy fixing seat, and guide pins penetrate through the pin holes and extend into annular guide grooves in the bottom of the osteotomy fixing seat.

In one embodiment, the rotating sleeve comprises a sleeve main body with a smooth inner surface and a cylinder wall split body detachably arranged on one side of the sleeve main body, and the surface of the cylinder wall split body facing the sleeve main body is a threaded surface capable of being matched with an external thread on the extramedullary positioning rod.

In one embodiment, the rotating sleeve further comprises a switching button which is arranged on the other side of the sleeve main body and is opposite to the cylinder wall split body, and the switching button and the cylinder wall split body are connected together through a connecting rod; the connecting rod penetrates through the cylinder wall of the sleeve main body, so that the cylinder wall split body is pushed to be separated from the sleeve main body through the connecting rod when the switching button moves towards the sleeve main body.

In one embodiment, the rotating sleeve further comprises a spring, the spring is disposed between the switch button and the sleeve body, and one end of the spring abuts against the switch button and the other end abuts against the sleeve body.

In one embodiment, the spring is placed in a counter bore formed in the wall of the sleeve body.

In one embodiment, the number of the connecting rods is two, the number of the springs is four, the springs are respectively arranged in an axisymmetric manner by taking the central line of the rotating sleeve as an axis, and the two springs are respectively sleeved on the two connecting rods correspondingly.

In one embodiment, a quick-connection fastener is hinged to the osteotomy fixing seat, two ends of the quick-connection fastener are respectively a long rod button and a latch, the long rod button is connected with the osteotomy fixing seat through a compression spring, one end of the compression spring props against the end face of the long rod button facing one side of the osteotomy fixing seat, and the other end of the compression spring props against the osteotomy fixing seat; the clamping teeth are inserted into a quick-connection cavity arranged at the bottom of the osteotomy plate and clamped in clamping grooves in the quick-connection cavity.

In one embodiment, the ankle embracing device comprises an ankle embracing base, an ankle embracing part and a position adjusting mechanism which is connected with the ankle embracing base in a sliding mode, wherein the position adjusting mechanism comprises a front adjusting rod and a rear adjusting rod, a sliding groove is formed in the rear end of the front adjusting rod, the extending direction of the sliding groove is perpendicular to the extending direction of the front adjusting rod and the rear adjusting rod, and a sliding block arranged at the front end of the ankle embracing base is embedded into the sliding groove and can slide along the sliding groove; the front and rear adjusting rods penetrate through a guide tube which is arranged at the bottom end of the extramedullary positioning rod and extends front and rear, and a first locking knob penetrates through the guide tube from the outer side and props against the front and rear adjusting rods; the second locking knob penetrates through the front and rear adjusting rods and the sliding groove in sequence from the front end and abuts against the sliding block.

In one embodiment, the end of the ankle holding base opposite to the sliding block is provided with two symmetrically arranged branches, the ankle holding part comprises clamping claws symmetrically arranged on the two branches respectively, the clamping claws are fixed on fixing columns at the tail ends of the branches, torsion springs are arranged on the fixing columns, and the clamping claws on the two branches are matched for wrapping the ankle joint.

In one embodiment, the extramedullary positioning rod comprises a rod body and a sleeve sleeved on the rod body, and the bottom end of the sleeve is fixed on the ankle holding device; the second adjusting mechanism comprises a third locking knob, and the third locking knob penetrates through the sleeve from the outer side and is propped against the rod body.

Drawings

Fig. 1 is a schematic perspective view of an osteotomy positioning device according to an embodiment of the present invention;

FIG. 2 is an exploded view of the osteotomy positioning device of FIG. 1;

FIG. 3 is an exploded view of the extramedullary positioning rod, the osteotomy fixation seat, and the first adjustment mechanism of the osteotomy positioning device of FIG. 1;

fig. 4 is a cross-sectional view of the osteotomy plate, the osteotomy holder and the extramedullary positioning rod of the osteotomy positioning device of fig. 1.

In the figure:

100. an extramedullary positioning rod, 111 an accommodating cavity, 112 a limiting groove, 113 a limiting pin, 120 a sleeve,

200. a osteotomy fixing seat, 210, an annular guide groove, 220, a quick-connect fastener, 221, a long rod key, 222, a latch, 223, a compression spring, 230, a pin shaft,

300. osteotomy plate, 310, quick connect cavity, 311, neck, 320, osteotomy groove,

400. a first adjusting mechanism, 410, a rotating sleeve, 411, a guide pin, 411a, a pin hole, 4101, a sleeve body, 4101a, a counter bore, 4102, a cylinder wall split, 4102a, a thread surface, 4103, a switch button, 4104, a connecting rod, 4105, a spring, 420, a guide rod,

500. an ankle clasper 510, an ankle clasping base 511, a sliding block 520, a position adjusting mechanism 521, a front and rear adjusting rod 522, a sliding groove 524, a guide tube 524a first locking knob 525, a second locking knob 530, an ankle clasping part 531, a claw 532, a fixed column 533, a torsion spring 533,

600. a second adjustment mechanism, 610, a third locking knob.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Those of ordinary skill in the art will recognize that variations and modifications of the various embodiments described herein can be made without departing from the scope of the invention, which is defined by the appended claims. Moreover, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. The description herein regarding directionality is consistent with the directional coordinates shown in fig. 1.

As shown in fig. 1-3, in one embodiment of the present invention, an osteotomy positioning device is provided, comprising: the external locating rod 100, the osteotomy fixing seat 200, the osteotomy plate 300, the first adjusting mechanism 400, the ankle embracing device 500 and the second adjusting mechanism 600. The osteotomy fixing seat 200 is provided at the upper end of the extramedullary positioning rod 100. The osteotomy plate 300 is mounted on the osteotomy holder 200 for positioning the osteotomy site of the tibial plateau. The first adjusting mechanism 400 is provided between the extramedullary positioning rod 100 and the osteotomy fixation seat 200 for adjusting the distance of the osteotomy fixation seat 200 relative to the upper end of the extramedullary positioning rod 100. The ankle embracing means 500 is provided at the lower portion of the extramedullary positioning rod 100 for wrapping and fixing the ankle.

Before a specific operation, the whole body of the utility model is vertically arranged in front of the tibia of the leg of a patient according to the direction shown in figure 1, so that the rear side of the osteotomy plate 300 faces and is close to the tibia; placing the ankle part of the patient in the ankle holding device 500 to wrap and fix the ankle joint by the ankle holding device 500, and enabling the bone cutting plate 300 at the upper end of the extramedullary positioning rod 100 to be approximately at a position close to the top of the tibia; measuring the height of the osteotomy platform by using measuring tools such as a probe and the like, and then adjusting the first adjusting mechanism 400 to change the distance between the osteotomy fixing seat 200 and the upper end of the extramedullary positioning rod 100 until the osteotomy groove 320 on the surface of the osteotomy plate 300 arranged on the osteotomy fixing seat 200 is aligned with the osteotomy platform, and at the moment, the osteotomy position of the tibial platform can be locked; during the cutting process, the cutting groove 320 on the surface of the cutting plate 300 has a guiding function on the bone saw, and can limit the moving area of the bone saw, so that the bone saw is always in the correct cutting position. The anterior-posterior distance of the ankle catcher 500 can be adjusted as needed to change the distance between the posterior side of the osteotomy plate 300 and the tibia.

Compared with the method for directly driving the positioning rod or the positioning nail into the tibia for positioning or fixing in the prior art, the method has the advantages that the fixing nail does not need to be driven on the tibia platform for fixing in the implementation process, the damage to the bone of a patient is reduced, the deviation of the osteotomy block caused by knocking the fixing nail is fundamentally avoided, and the osteotomy position is more accurate.

The problem that extramedullary location precision is not high has been solved to the adjustment mechanism who cooperates the setting. Firstly, the osteotomy plate 300 at the upper end of the extramedullary positioning rod 100 is positioned at a position close to the top of the tibia, and then the first adjusting mechanism 400 is operated in a matching way to finely adjust the distance between the osteotomy fixing seat 200 and the upper end of the extramedullary positioning rod 100, so that the position of the osteotomy plate 300 is quickly and accurately adjusted to adjust the osteotomy error, and the probability of postoperative complications caused by inaccurate osteotomy is effectively reduced; the osteotomy plate 300 can be quickly moved to a required position, the adjustment process is convenient for the operation of a doctor, and the implementation efficiency of the operation is improved.

The device does not need to drive the positioning rod or the positioning nail into the tibia for positioning or fixing, so that a positioning tool does not need to be taken out of the tibia before formal osteotomy operation; meanwhile, the connection of the extramedullary positioning rod 100 does not interfere with the osteotomy groove 320 on the osteotomy plate 300, so that the extramedullary positioning rod 100 and the ankle holding device 500 connected with the osteotomy plate 300 do not need to be taken down during the osteotomy operation, the fixation of the osteotomy plate 300 can be assisted and fixed in real time by utilizing the fixation effect of the extramedullary positioning rod 100 and the ankle holding device 500, the position of the osteotomy plate 300 is ensured to be stable enough in the osteotomy operation process, the osteotomy plate 300 cannot deviate or become flexible, and the purpose of accurate osteotomy is achieved.

In some embodiments, a second adjustment mechanism 600 is also included on the extramedullary positioning rod 100 for adjustably varying the length of the extramedullary positioning rod 100. Can operate second adjustment mechanism 600 with the length of adjusting extramedullary locating lever 100 according to patient's shin bone length earlier during the location, make extramedullary locating lever 100 upper end cut bone plate 300 roughly be in the position that is close to the shin bone top, thereby can make the utility model discloses a device is applicable to the patient of different shin bone sizes, does not need to correspond each kind of shin bone size and corresponds the bone cutting positioner who prepares various specification and dimension, has promoted the adaptability and the flexibility of this device, has reduced the input cost.

Referring to fig. 3, in some embodiments, the first adjustment mechanism 400 includes a guide rod 420 and a rotary sleeve 410, the guide rod 420 having one end fixed to a lower portion of the osteotomy fixing base 200 and the other end inserted into a rotation preventing structure of an upper portion of the extramedullary positioning rod 100, the rotation preventing structure being a structure for preventing the rotation of the osteotomy fixing base 200 relative to the extramedullary positioning rod 100; the rotary sleeve 410 is screwed and fitted over the extramedullary positioning rod 100, and the upper end of the rotary sleeve 410 is rotatably connected to the osteotomy fixation seat 200.

Because the rotating sleeve 410 is spirally matched and sleeved on the extramedullary positioning rod 100, when the rotating sleeve 410 is operated to rotate, the rotating sleeve 410 can move up and down along the extramedullary positioning rod 100, and then drives the osteotomy fixing seat 200 which is rotationally connected with the rotating sleeve to move up and down; the guide rod 420 plays a role in accurate guiding, and is inserted into the anti-rotation structure of the extramedullary positioning rod 100 to prevent the osteotomy fixing seat 200 from rotating in the circumferential direction synchronously with the rotation sleeve 410 while moving up and down along with the rotation sleeve, thereby reducing the influence on the positioning operation.

Referring to fig. 3 and 4, in some embodiments, the rotation preventing structure includes a receiving cavity 111 formed downward along an axial direction of the extramedullary positioning rod 100 from an upper end surface of the extramedullary positioning rod 100, a limiting groove 112 formed on a rod body of the extramedullary positioning rod 100 along the axial direction and communicating with the receiving cavity 111, and a limiting pin 113 inserted into the guide rod 420 in the receiving cavity 111 through the limiting groove 112 from the outside. The osteotomy fixing seat 200 and the extramedullary positioning rod 100 are connected into a whole through the limiting pin 113, so that the osteotomy fixing seat 200 can move up and down relative to the extramedullary positioning rod 100 without relative rotation, and the up-and-down movement distance of the osteotomy fixing seat 200 is limited through the matching of the limiting pin 113 and the limiting groove 112. In other embodiments, the anti-rotation structure comprises an accommodating cavity formed in the upper part of the extramedullary positioning rod along the axial direction of the extramedullary positioning rod, the cross-sectional shapes of the guide rod and the accommodating cavity are square, semicircular and the like which are matched, and relative rotation between the guide rod and the extramedullary positioning rod can be limited through simple shape matching.

With continued reference to figure 3, in some embodiments, the end of the rotary sleeve 410 that is connected to the osteotomy holder 200 is circumferentially provided with a plurality of pin holes 411a, and the guide pins 411 extend through the pin holes 411a and into the annular guide slot 210 at the bottom of the osteotomy holder 200. By adopting the structure, the rotary sleeve 410 and the osteotomy fixing seat 200 can be rotationally connected together, the synchronous upward or downward movement of the rotary sleeve 410 and the osteotomy fixing seat 200 can be ensured, and meanwhile, the rotary sleeve 410 and the osteotomy fixing seat 200 can relatively rotate around a shaft due to the existence of the annular guide groove 210; when the rotating sleeve 410 is rotated to move up and down along the extramedullary positioning rod 100, the rotating sleeve 410 will drive the osteotomy fixation seat 200 to move up and down. In other embodiments, a rotary bearing may be installed at a position where the rotary sleeve 410 is connected to the osteotomy fixing seat 200, an outer ring of the rotary bearing is connected to the rotary sleeve 410, and an inner ring of the rotary bearing is fixed to the osteotomy fixing seat 200, and by using the structure, the rotary sleeve 410 and the osteotomy fixing seat 200 may be connected together to move up or down synchronously, and the rotary sleeve 410 and the osteotomy fixing seat 200 can rotate relatively.

Referring to fig. 3 and 4, in some embodiments, the rotary sleeve 410 includes a sleeve body 4101 having a smooth inner surface and a cylinder wall part 4102 detachably provided at one side of the sleeve body 4101, and the surface of the cylinder wall part 4102 facing the sleeve body 4101 is a threaded surface 4102a capable of being engaged with an external thread on the extramedullary positioning rod 100. When the cylinder wall split 4102 is installed at one side of the sleeve body 4101, the thread surface 4102a of the cylinder wall split 4102 can be matched with the external thread on the extramedullary positioning rod 100, at the moment, the rotary sleeve 410 is rotated, and the rotary sleeve 410 can move up and down along the extramedullary positioning rod 100 under the action of the thread matching, so as to finely adjust the position of the osteotomy plate 300 on the osteotomy fixing seat 200; when the adjustment speed needs to be further increased, the cylinder wall split body 4102 is taken down to be separated from the sleeve body 4101, at this time, the thread fit between the cylinder wall split body 4102 and the extramedullary positioning rod 100 is released, the inner surface of the sleeve body 4101 is a smooth surface and cannot be matched with the external thread on the extramedullary positioning rod 100, the sleeve body 4101 can be directly held to move up and down relative to the extramedullary positioning rod 100, and when the required position is reached, the upper cylinder wall split body 4102 is mounted to ensure that the thread surface 4102a thereof is matched and locked with the external thread on the extramedullary positioning rod 100, so that the rotary sleeve 410 can be fixed on the extramedullary positioning. Through the setting, the locking and the releasing of the thread fit between the rotary sleeve 410 and the extramedullary positioning rod 100 can be realized, so that the adjusting mode can be changed according to the operation requirement in the operation, the free switching between the two adjusting modes can be realized during the specific operation, the rotary sleeve 410 can be quickly moved after the cylinder wall split 4102 is taken down, the height position of the osteotomy plate 300 can be finely adjusted through the thread fit after the cylinder wall split 4102 is installed, the osteotomy amount can be quickly and accurately adjusted, and the operation and the use are more flexible and convenient. It will be appreciated that in other embodiments, internal threads may be provided around the inner surface of the rotary sleeve 410, which mate with external threads on the extramedullary positioning rod 100, and that direct rotation of the rotary sleeve 410 may cause it to move up and down along the extramedullary positioning rod 100 to fine tune the position of the osteotomy plate 300 on the osteotomy fixture 200 without affecting the normal operation of the present invention.

With continued reference to fig. 3 and 4, in some embodiments, the rotary sleeve 410 further includes a switching button 4103 disposed on the other side of the sleeve body 4101 opposite to the cylinder wall part 4102, the switching button 4103 and the cylinder wall part 4102 being connected together by a connecting rod 4104; the connecting rod 4104 penetrates through the cylindrical wall of the sleeve body 4101 so that the cylindrical wall part 4102 is pushed by the connecting rod 4104 to be separated from the rotary sleeve 410 when the switching button 4103 moves toward the sleeve body 4101. When the thread engagement between the cylinder wall split 4102 and the extramedullary positioning rod 100 needs to be released, the cylinder wall split 4102 and the extramedullary positioning rod 100 can be separated by pushing the switching button 4103 in the direction of the cylinder wall split 4102, so that the thread engagement is released; when the cylindrical wall part 4102 and the intramedullary positioning rod 100 need to be screwed, the switching button 4103 is pushed in a direction opposite to the cylindrical wall part 4102, so that the thread surface 4102a of the cylindrical wall part 4102 can be screwed with the external thread on the intramedullary positioning rod 100. The switching button 4103 increases the convenience of operation, and the cylindrical wall part 4102 does not need to be removed when the screw engagement is released, so that the cylindrical wall part 4102 can be prevented from being accidentally lost after being directly removed from the sleeve body 4101.

With continued reference to fig. 3, in some embodiments, the rotatable sleeve 410 further includes a spring 4105, the spring 4105 being disposed between the shift button 4103 and the sleeve body 4101, and the spring 4105 bearing against the shift button 4103 at one end and the sleeve body 4101 at the other end. Pushing the switching button 4103 in the direction of the cylinder wall part 4102 can separate the cylinder wall part 4102 from the extramedullary positioning rod 100, so that the screw engagement is released, and the rotating sleeve 410 can be freely moved up and down; when the switch button 4103 is released, the spring 4105 has a function of rebounding, so that the switch button 4103 moves to an initial position in a direction away from the sleeve body 4101 by the rebounding force of the spring 4105, and the switch button 4103 simultaneously drives the cylinder wall components 4102 to move, so that the thread surface 4102a of the cylinder wall components 4102 and the external thread on the surface of the sleeve body 4101 are quickly restored to be in thread fit. Through this setting can make the screw-thread fit between gyration sleeve 410 and extramedullary locating rod 100 can be in locking and the quick free switch-over between the state of removing, and it is more convenient to operate, and screw-thread fit can be under the effect of spring 4105 the quick locking state that resumes.

Preferably, the spring 4105 is inserted into a counter bore 4101a formed in the cylindrical wall of the sleeve body 4101, and when the rotation sleeve 410 is screwed to the extramedullary positioning rod 100, the distance between the switching button 4103 and the sleeve body 4101 can be reduced, so that the entire structure of the rotation sleeve 410 is more compact and simpler.

More preferably, two connecting rods 4104 are provided, four springs 4105 are provided, and are respectively provided to be axisymmetrical with respect to the center line of the rotary sleeve 410, and two springs 4105 are respectively fitted over the two connecting rods 4104. The four springs 4105 are provided to increase resilience, so as to ensure that the thread surface 4102a of the cylinder wall part 4102 can be tightly matched with the external thread on the surface of the sleeve body 4101, the two symmetrical connecting rods 4104 can play a role in stably and symmetrically guiding, and the two springs 4105 sleeved on the two connecting rods 4104 can be well supported by the connecting rods 4104, so that the springs 4105 can be prevented from being bent when rebounding. It is understood that in other embodiments, a symmetrical configuration of four connecting rods 4104 cooperating with four springs 4105 may be provided, without limitation.

It is understood that, in some other embodiments, the first adjusting mechanism 400 may adopt an adjusting structure such as a cylinder with a higher manufacturing cost, an electric telescopic rod, or a ball screw mechanism with a higher structural complexity, and can perform fine adjustment on the distance between the osteotomy fixing base 200 and the upper end of the extramedullary positioning rod 100, which is not limited herein.

With continued reference to fig. 3 and 4, in some embodiments, the osteotomy holder 200 is hinged to a quick-connect fastener 220 through a pin 230, two ends of the quick-connect fastener 220 are respectively a long-rod button 221 and a latch 222, the long-rod button 221 is connected to the osteotomy holder 200 through a compression spring 223, one end of the compression spring 223 abuts against an end surface of the long-rod button 221 facing one side of the osteotomy holder 200, and the other end abuts against the osteotomy holder 200; the latch 222 is inserted into a snap-fit cavity 310 provided in the bottom of the osteotomy plate 300 and is latched into a latch slot 311 in the snap-fit cavity 310. When the osteotomy plate 300 needs to be installed, the long rod key 221 is pressed, under the lever action, the latch 222 at the other end of the quick-connection clamping piece 220 is lifted, extends into the position close to the clamping groove 311 in the quick-connection cavity 310, and can be clamped in the clamping groove 311 in the quick-connection cavity 310 by loosening the long rod key 221, at the moment, the compression spring 223 always supports against the long rod key 221, and the latch 222 can be firmly matched and assembled with the clamping groove 311 under the lever action, so that the osteotomy plate 300 is ensured to be fixedly installed and stable; when the osteotomy plate 300 needs to be detached, the long rod button 221 is pressed, and the clamping tooth 222 at the other end of the quick clamping piece 220 can be separated from the clamping groove 311 under the lever action, so that the osteotomy plate 300 and the osteotomy fixing seat 200 can be quickly separated. Through the structure, the bone cutting plate 300 can be stably connected with and quickly detached from the bone cutting fixing seat 200, and the bone cutting plate is convenient to assemble, use, disassemble, classify, arrange and store uniformly.

Referring to fig. 1 and 2, in some embodiments, ankle clasper 500 includes an ankle clasping base 510, an ankle clasping portion 530 movably coupled to one end of ankle clasping base 510, and a position adjustment mechanism 520 slidably coupled to the other end of ankle clasping base 510, and position adjustment mechanism 520 includes a front and rear adjustment lever 521. The "anterior-posterior" is determined according to the direction of the osteotomy positioning device when being fixed on the human tibia, the direction towards the front of the human body is "anterior", the direction towards the back of the human body is "posterior", and the "upper, lower, left and right" is also determined according to the rule herein, as no special description is made, and the direction is specifically referred to as the direction marked in fig. 1. The rear end of the front and rear adjusting rod 521 is provided with a sliding chute 522 extending left and right (perpendicular to the extending direction of the front and rear adjusting rod 521), and the sliding block 511 arranged at the front end of the ankle holding base 510 is matched and embedded in the sliding chute 522 and can slide along the sliding chute 522; the front and rear adjusting rods 521 pass through a guide tube 524 which is provided at the bottom end of the extramedullary positioning rod 100 and extends forward and backward, and a first locking knob 524a passes through the guide tube 524 from the outside and abuts against the front and rear adjusting rods 521 from the side; a second locking knob 525 is screwed in sequence from the front end through the front and rear adjustment rods 521 and the slide groove 522 and abuts against the slider 511. The first locking knob 524a and the second locking knob 525 are unscrewed, so that the sliding block 511 at the front end of the base slides along the sliding groove 522 to adjust the left-right direction of the ankle holding base 510, and the left-right direction of the ankle holding base 510 can be fixed by screwing the second locking knob 525 after the adjustment is finished; the front and rear adjustment rods 521 can be slid along the guide pipes 524 to adjust the front and rear directions of the ankle support base 510, and the first locking knobs 524a can be screwed after adjustment to fix the front and rear directions of the ankle support base 510. The ankle hugger 500 described in this embodiment allows for quick adjustment of the front-to-back and side-to-side directions to accurately position the osteotomy plate 300. It is understood that the steps of adjusting the left-right direction and the front-rear direction of the ankle 530 may be performed in an alternate order or alternately several times, and are not limited to the above-described implementation method.

In some embodiments, the end of the ankle-holding base 510 opposite to the sliding block 511 has 2 symmetrically disposed branches, the ankle-holding part 530 includes two clamping claws 531 symmetrically disposed on the 2 branches, the clamping claws 531 are fixed on fixing columns 532 at the ends of the branches, and the fixing columns 532 are provided with torsion springs 533, and the clamping claws 531 at two sides cooperate to wrap the ankle joint together. During operation, the claws 531 on the two sides of the ankle holding base 510 are opened, the ankle of the patient is placed between the two claws 531, and after the claws 531 are loosened, the power-accumulating torsion spring 533 enables the claws 531 to have the tendency of restoring to the initial position, so that the claws 531 can firmly fix the ankle joints under the rebounding torsion action of the torsion spring 533, and the stability is better.

Referring to fig. 1 and 2, in some embodiments, the extramedullary positioning rod 100 includes a rod body and a sleeve 120 sleeved on the rod body, and the bottom end of the sleeve 120 is fixed on the ankle embracing device 500; the second adjustment mechanism 600 includes a third locking knob 610 that is threaded through the sleeve 120 from the outside and against the rod body. The third locking knob 610 is unscrewed to slide the rod body along the sleeve 120 to change the overall length of the extramedullary positioning rod 100, and the extramedullary positioning rod 100 can be maintained at a desired length by screwing the third locking knob 610 after the length is adjusted. In other embodiments, the extramedullary positioning rod 100 is a multi-section telescopic rod, and the second adjusting mechanism 600 includes, but is not limited to, an air cylinder, an oil cylinder or an electric telescopic rod disposed on the multi-section telescopic rod, and the length of the multi-section telescopic rod can be adjusted and changed by the air cylinder, the oil cylinder or the electric telescopic rod.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An osteotomy positioning device, comprising:

2. The osteotomy positioning device of claim 1, further comprising:

and the second adjusting mechanism is arranged on the extramedullary positioning rod and is used for adjusting the length of the extramedullary positioning rod.

3. The osteotomy positioning device of claim 1, wherein said first adjustment mechanism comprises:

4. The osteotomy positioning device of claim 3, wherein said anti-rotation structure comprises:

5. The osteotomy positioning device of claim 3, wherein said rotatable sleeve has a plurality of pin holes formed circumferentially around an end thereof connected to said osteotomy holder, and guide pins extending through said pin holes and into annular guide slots formed in a bottom portion of said osteotomy holder.

6. The osteotomy positioning device of claim 3, wherein the rotation sleeve includes a sleeve body having a smooth inner surface and a split body detachably disposed at one side of the sleeve body, and the surface of the split body facing the sleeve body is a threaded surface capable of mating with the external thread of the extramedullary positioning rod.

7. The osteotomy positioning device of claim 6, wherein said rotating sleeve further comprises a switch button disposed on the other side of said sleeve body opposite to said cylinder wall split body, said switch button and said cylinder wall split body being connected together by a connecting rod; the connecting rod penetrates through the cylinder wall of the sleeve main body, so that the cylinder wall split body is pushed to be separated from the sleeve main body through the connecting rod when the switching button moves towards the sleeve main body.

8. The osteotomy positioning device of claim 7, wherein said swivel sleeve further comprises a spring disposed between said shift button and said sleeve body, said spring having one end bearing against said shift button and another end bearing against said sleeve body.

9. The osteotomy positioning device of claim 8, wherein said spring is disposed in a counterbore formed in a wall of said sleeve body.

10. The osteotomy positioning device of claim 9, wherein there are two of said connecting rods and four of said springs disposed axially symmetrically about a centerline of said swivel sleeve, and wherein two of said springs are disposed about respective ones of said two connecting rods.

11. The osteotomy positioning device of any one of claims 1-10, wherein a quick-connect fastener is hinged to the osteotomy holder, the quick-connect fastener having a rod button and a latch at two ends thereof, the rod button being connected to the osteotomy holder by a compression spring, one end of the compression spring abutting against an end surface of the rod button facing one side of the osteotomy holder and the other end abutting against the osteotomy holder; the clamping teeth are inserted into a quick-connection cavity arranged at the bottom of the osteotomy plate and clamped in clamping grooves in the quick-connection cavity.

12. The osteotomy positioning device according to any one of claims 1-10, wherein the ankle embracing device comprises an ankle embracing base, an ankle embracing portion, and a position adjusting mechanism slidably coupled to the ankle embracing base, the position adjusting mechanism comprises a front and rear adjusting lever, a sliding groove is provided at a rear end of the front and rear adjusting lever, an extending direction of the sliding groove is perpendicular to an extending direction of the front and rear adjusting lever, and a sliding block provided at a front end of the ankle embracing base is embedded in the sliding groove and can slide along the sliding groove; the front and rear adjusting rods penetrate through a guide tube which is arranged at the bottom end of the extramedullary positioning rod and extends front and rear, and a first locking knob penetrates through the guide tube from the outer side and props against the front and rear adjusting rods; the second locking knob penetrates through the front and rear adjusting rods and the sliding groove in sequence from the front end and abuts against the sliding block.

13. The osteotomy positioning device of claim 12, wherein the ankle support has two symmetrically disposed branches at an end thereof opposite to the sliding block, the ankle portion includes two claws symmetrically disposed on the two branches, the claws are fixed on fixing posts at ends of the branches, and the fixing posts are provided with torsion springs, and the claws on the two branches cooperate to wrap the ankle joint.

14. The osteotomy positioning device of any one of claims 2-10, wherein said extramedullary positioning rod comprises a rod body and a sleeve sleeved on said rod body, and a bottom end of said sleeve is fixed on said ankle holding device; the second adjusting mechanism comprises a third locking knob, and the third locking knob penetrates through the sleeve from the outer side and is propped against the rod body.