Positioning and resetting device for tibial plateau fracture minimally invasive surgery

Abstract

The utility model discloses a positioning and resetting device for tibial plateau fracture minimally invasive surgery, and belongs to the technical field of medical surgical instruments. Comprising a positioning device which is composed of a positioning arm and an adjusting arm; the sleeve seat is provided with a sleeve containing cavity, the lower end of the adjusting arm is matched with the upward side of the sleeve seat in a pluggable adjusting mode, and a pair of first kirschner wire fixing holes are formed in the lower portion of the sleeve seat. The sleeve is matched with the sleeve accommodating cavity in a plugging manner and is locked or unlocked by a sleeve adjusting and locking mechanism which is arranged at the bottom of the sleeve seat and is communicated with the sleeve accommodating cavity; and the inner core is matched with the sleeve cavity in a plugging manner, the left end part of the inner core extends out of the sleeve cavity and forms a supporting flange, and a second kirschner wire fixing hole is formed in the central position of the inner core. The method has the advantages that three-point stability is embodied, the positioning stability is guaranteed, and the applicability is improved; the stability and reliability of positioning are guaranteed, and the operation efficiency is improved; the operation efficiency is improved; the structure is simple, and adjusting operation is flexible; and the applicability of the positioner is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the medical operation tool technical field, specifically relates to a tibial plateau fracture minimally invasive surgery positioning, reset device for the accurate positioning and reset of the collapsed bone block under the monitoring of arthroscope in minimally invasive surgery. BACKGROUND

[0002] The tibial plateau refers to a wide platform structure formed at the proximal end of the tibia. The tibial plateau, together with the distal femur, the patella, and the surrounding soft tissues, forms the knee joint. When the knee joint is subjected to external factors such as falling from a height, violent impact, and car accidents, the tibial plateau is prone to fracture. Tibial plateau fractures are intra-articular fractures that usually require surgical treatment, otherwise they will affect the function of the knee joint in the later stage. The most commonly used classification (diagnosis) of tibial plateau fractures is Schatzker classification. Specifically, according to the different inner and outer platforms of the tibial plateau, the different fracture sites, and the different injury mechanisms, the surgical treatment methods are also correspondingly different. For example, hollow screws are used for fixation, and inner and outer steel plates are used for fixation. If the tibial plateau is severely comminuted, inner and outer double steel plates can be used for fixation.

[0003] As known in the industry, with the development of technology, it has become the industry consensus to use arthroscopic assistance to perform minimally invasive surgery on tibial plateau fractures under arthroscopy, which has the advantages of less damage, shorter operation time, and faster recovery. As also known in the industry, minimally invasive surgery for tibial plateau fractures requires the use of appropriate surgical instruments.

[0004] In the disclosed Chinese patent documents, there are technical information related to surgical instruments for tibial plateau fracture minimally invasive surgery. For example, CN203815587U recommends a "tibial plateau fracture minimally invasive surgery positioning and reduction device", which has the advantages summarized in paragraphs 0016 to 0019 of the specification, but the structure is very complex and the operation of the surgeon is troublesome. CN109009375A provides a "tibial plateau articular surface collapse fracture reduction device and its application method", and CN213310206U introduces a "tibial plateau fracture percutaneous reduction device" (which requires the use of first and second clamping arms). The common problems existing in the above-mentioned patents are: due to the single-point positioning, on the one hand, the applicability is limited, on the other hand, the stability of the positioning is affected, and on the other hand, the operation space is small and not conducive to improving the surgical efficiency. UTILITY MODEL CONTENT

[0005] The utility model discloses a task is to provide a kind of tibial plateau fracture minimally invasive surgery positioning, reset device, which is helpful to reflect good positioning effect, so as to improve applicability, is conducive to guaranteeing the stability and reliability of positioning, so as to guarantee surgical effect, is beneficial to increase operation space and operation stability, so as to improve surgical efficiency, and it is convenient to discard the use of double arms, so as to simplify structure.

[0006] The utility model discloses a task is thus completed, a tibial plateau fracture minimally invasive surgery positioning, reset device, including a positioner, the positioner is by the positioning arm and an adjusting arm of each other and is made into integral structure, and the upper end between the positioning arm and the adjusting arm is connected by arm link transition, and the lower end between the opposite side forms an open mouth as knee joint cavity, the lower end of the positioning arm and the side of open mouth in use state is used for the top hook of toping in tibial plateau fracture collapse articular surface;A sleeve seat and a sleeve, the sleeve seat has a sleeve accommodating cavity from left end to right end, the lower end of the adjusting arm and the side of sleeve seat towards upper are inserted and are adjusted to cooperate, and the lower part of sleeve seat is opened with the first kirschner wire fixed hole from the left end of sleeve seat to the right end for entering the bone cortex of bone block in use state, the sleeve and the sleeve accommodating cavity are inserted and are adjusted to cooperate and are locked or are unlocked by the sleeve adjusting locking mechanism of the sleeve accommodating cavity of configuration at the bottom of sleeve seat;An inner core, the inner core and the sleeve cavity of sleeve are inserted and are adjusted to cooperate, and the left end of the inner core is out of sleeve cavity and is constructed with the support flange of the bone cortex outside away from the opposite side of bone block disease in use state, and the center position of the length direction of inner core is opened with the second kirschner wire fixed hole of through inner core and support flange.

[0007] In one specific embodiment of the utility model, a top hook inclined surface is formed on the side surface of the top hook facing the opening in the use state for abutting against the tibial plateau fracture collapse articular surface.

[0008] In another specific embodiment of the utility model, an adjusting arm sliding fitting arm is extended on the side of the sleeve seat facing upward, an adjusting groove is formed on the front side of the adjusting arm sliding fitting arm, the adjusting arm is inserted and adjusted to cooperate with the adjusting groove, and the adjusting arm and the adjusting arm sliding fitting arm are locked or unlocked by the adjusting arm locking screw arranged on the rear side of the adjusting arm sliding fitting arm.

[0009] In still another specific embodiment of the utility model, a sleeve locking tongue hole for communicating the sleeve accommodating cavity with the outside is formed on the cavity bottom wall of the sleeve accommodating cavity of the sleeve seat; a sleeve locking tongue matching groove is formed on the outer wall of one side of the sleeve in an interval state along the length direction of the sleeve; the sleeve adjusting and locking mechanism is arranged at the bottom of the sleeve seat at a position corresponding to the sleeve locking tongue hole and is locked or unlocked with the sleeve locking tongue matching groove.

[0010] In still another specific embodiment of the utility model, a sleeve adjusting and locking mechanism seat is formed at the bottom of the sleeve seat and at a position corresponding to the sleeve locking tongue hole, the sleeve adjusting and locking mechanism seat has a sleeve adjusting and locking mechanism matching cavity which communicates with the sleeve locking tongue hole and the outside at the same time; the sleeve adjusting and locking mechanism comprises a sleeve locking tongue, a spring and a spring limiting screw, the sleeve locking tongue, the spring and the spring limiting screw are sequentially arranged in the sleeve adjusting and locking mechanism matching cavity from top to bottom, the sleeve locking tongue is displaced up and down to correspond to the sleeve locking tongue hole, the lower end face of the sleeve locking tongue supports the upper end of the spring, the lower end of the spring supports the spring limiting screw, and the spring limiting screw is threadedly matched with the inner wall of the sleeve adjusting and locking mechanism matching cavity; when the sleeve is rotated to make the sleeve locking tongue matching groove rotate away from the position corresponding to the sleeve locking tongue, the sleeve locking tongue is pressed by the sleeve and the spring is compressed, the sleeve is in a state of being released from the locking of the sleeve locking tongue and is adjusted to slide left and right in the sleeve accommodating cavity; when the sleeve is rotated to make the sleeve locking tongue matching groove be in the position corresponding to the sleeve locking tongue, the spring is released to push the sleeve locking tongue upward and make the sleeve locking tongue project out of the sleeve locking tongue hole and be matched with the sleeve locking tongue matching groove to lock the sleeve.

[0011] In still another specific embodiment of the utility model, a sleeve limiting flange with a diameter larger than the outer diameter of the sleeve is formed at the right end of the sleeve, the left side surface of the sleeve limiting flange is in contact with the right side surface of the sleeve seat, an inner core right end face extension flange matching cavity is formed on the inner wall of the sleeve limiting flange and around the circumferential direction of the sleeve limiting flange, an inner core right end face extension flange with a diameter larger than the diameter of the inner core is formed at the right end of the inner core, and the inner core right end face extension flange is matched with the inner core right end face extension flange matching cavity when the inner core is inserted into the sleeve cavity.

[0012] In still another specific embodiment of the utility model, the pair of first Kirsch needle fixing holes and the second Kirsch needle fixing hole are distributed in a triangular position relationship.

[0013] In still another specific embodiment of the utility model, the triangle is an equilateral triangle or an isosceles triangle.

[0014] In yet another specific embodiment of the present application, a weight-reducing through hole is provided in the length direction of the inner core and spaced around the periphery of the second Kirschner needle fixing hole, which penetrates the abutting flange.

[0015] In yet another specific embodiment of the present application, the sleeve locking tongue fitting groove is a circular arc groove.

[0016] The technical effect of the technical scheme provided by the present application is that: because a pair of first Kirschner needle fixing holes are provided in the lower part of the sleeve seat from the left end to the right end, and a second Kirschner needle fixing hole is provided in the center position of the length direction of the inner core, which penetrates the inner core and the abutting flange, the stability of positioning and applicability are improved; because only one positioner is needed, unlike the prior art which uses a pair of positioners, the stability and reliability of positioning are ensured, and the operation efficiency is improved; because the structure of performing surgery in the sleeve cavity of the sleeve is adopted, the operation space is large compared with the prior art, which is beneficial to improving the surgery efficiency; because the structure of the positioner is simple, the adjustment operation is convenient; because the position of the adjusting arm is adjustable, the applicability of the positioner is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is an assembly structure of the present application;

[0018] Figure 2 is Figure 1 an assembly structure;

[0019] Figure 3 is Figure 1 a schematic view of the rear side;

[0020] Figure 4 is a schematic view of the drill rod used in the process of following the Kirschner needle and collapsing the fracture site during the minimally invasive surgery of tibial plateau fracture using the present application. DETAILED DESCRIPTION

[0021] In order to more clearly understand the technical essence and beneficial effects of the present application, the applicant will make a detailed description in the form of examples below, but the description of the examples is not a limitation on the technical scheme of the present application, and any equivalent transformation only in form but not in substance made according to the technical concept of the present application should be regarded as the technical scheme of the present application.

[0022] In the following description, any directional or positional concepts such as up, down, left, right, front, back, bottom and top wall are based on the current orientation of the drawingsFigure 1 The position state is taken as a reference, thus it cannot be understood as a special limitation to the technical solution provided by the utility model.

[0023] Please see Figures 1 to 3 , shows a locator 1, the locator 1 is by the positioning arm 11 and the adjusting arm 12 of one another constitutes integral structure, the upper end between the positioning arm 11 and the adjusting arm 12 is by arm link 13 transition connection, and the lower end between the opposite side forms an as the knee joint cavity open mouth 14, the lower end of positioning arm 11 and the side of open mouth 14 is configured with a top hook 111 for abutting on the tibial plateau fracture collapse joint surface in use state;A sleeve seat 2 and a sleeve 3, the sleeve seat 2 has a sleeve accommodating cavity 21 from the left end to the right end, the lower end of the aforementioned adjusting arm 12 and the sleeve seat 2 towards the upper side plug-in adjusting cooperation, and the lower part of sleeve seat 2 is provided with a pair of first kirschner wire fixing hole 22 from the left end of sleeve seat 2 to the right end for entering the bone cortex of the bone block in use state, the sleeve 3 is plug-in cooperation with the aforementioned sleeve accommodating cavity 21 and is locked or unlocked by the sleeve adjusting locking mechanism 23 of the sleeve accommodating cavity 21 of the bottom of sleeve seat 2;Showed a core 4, the core 4 is plug-in cooperation with the sleeve cavity 31 of sleeve 3, the left end of the core 4 protrudes from the sleeve cavity 31 and is configured with a supporting flange 41 abutting on the bone cortex outside away from the opposite side of the bone block in use state, a second kirschner wire fixing hole 42 is provided in the length direction of the core 4 center position through the core 4 and the supporting flange 41.

[0024] The side surface of the aforementioned top hook 111 towards the aforementioned open mouth 14 is configured with a top hook inclined surface 1111 for abutting on the aforementioned tibial plateau collapse joint surface in use state. Adjusting the aforementioned adjusting arm 12 is conducive to adjusting the positioning angle and removing the locator 1 after subsequent positioning.

[0025] The aforementioned sleeve seat 2 extends towards the upper side of the adjusting arm sliding cooperation arm 24, an adjusting groove 241 is provided on the front side of the adjusting arm sliding cooperation arm 24, the aforementioned adjusting arm 12 is plug-in adjusting cooperation with the adjusting groove 241, and the adjusting arm 12 is locked or unlocked with the aforementioned adjusting arm sliding cooperation arm 24 by the adjusting arm locking screw 242 arranged on the rear side of the adjusting arm sliding cooperation arm 24.

[0026] As a preferred scheme, adjusting scale marks can also be provided on the left side of the aforementioned adjusting arm 12 along the height or length direction of the adjusting arm 12, so as to well grasp and understand the adjusting degree.

[0027] Please see Figure 1A sleeve locking tongue hole 211 is formed in the bottom wall of the sleeve accommodating cavity 21 of the sleeve seat 2 to communicate the sleeve accommodating cavity 21 with the outside; a sleeve locking tongue engaging groove 32 is formed in the outer wall of one side of the sleeve 3 and along the length direction of the sleeve 3 in a spaced state; the sleeve adjusting and locking mechanism 23 is arranged in the bottom of the sleeve seat 2 at a position corresponding to the sleeve locking tongue hole 211 and is locked or unlocked with the sleeve locking tongue engaging groove 32.

[0028] A sleeve adjusting and locking mechanism seat 25 is formed in the bottom of the sleeve seat 2 at a position corresponding to the sleeve locking tongue hole 211, which has a sleeve adjusting and locking mechanism engaging cavity 251 communicating with the sleeve locking tongue hole 211 and the outside; the sleeve adjusting and locking mechanism 23 comprises a sleeve locking tongue 231, a spring 232 and a spring limiting screw 233, which are arranged in the sleeve adjusting and locking mechanism engaging cavity 251 in sequence from top to bottom, and the sleeve locking tongue 231 is displaced up and down corresponding to the sleeve locking tongue hole 211, the lower end face of the sleeve locking tongue 231 supports the upper end of the spring 232, the lower end of the spring 232 supports the spring limiting screw 233, and the spring limiting screw 233 is threadedly engaged with the inner wall of the sleeve adjusting and locking mechanism engaging cavity 251.

[0029] When the sleeve 3 is rotated to make the sleeve locking tongue engaging groove 32 rotate away from (i.e. "spin away from") the position corresponding to the sleeve locking tongue 231, the sleeve locking tongue 231 is pressed by the wall of the sleeve 3 and the spring 232 is compressed, the sleeve 3 is in a state of getting rid of the locking of the sleeve locking tongue 231 and is adjusted to slide left and right in the sleeve accommodating cavity 21; when the sleeve 3 is rotated to make the sleeve locking tongue engaging groove 32 be in the position corresponding to the sleeve locking tongue 231, the spring 232 is released to push the sleeve locking tongue 231 upward and make the sleeve locking tongue 231 project out of the sleeve locking tongue hole 211 and engage with the sleeve locking tongue engaging groove 32 to lock the sleeve 3.

[0030] The reason why the sleeve 3 cannot be adjusted left or right when the sleeve locking tongue engaging groove 32 corresponds to the sleeve locking tongue 231 is that the sleeve locking tongue engaging groove 32 is a circular arc groove, so the sleeve locking tongue engaging groove 32 has no control effect on the rotation of the sleeve 3, but has control effect on the left and right displacement adjustment of the sleeve 3.

[0031] A sleeve limiting flange 33 with a diameter larger than the outer diameter of the sleeve 3 is formed at the right end of the aforementioned sleeve 3, and the left side of the sleeve limiting flange 33 is in contact with the right side of the aforementioned sleeve seat 2. An inner core right end face extended flange matching cavity 331 is formed on the inner wall of the sleeve limiting flange 33 and around the circumferential direction of the sleeve limiting flange 33, and an inner core right end face extended flange 43 with a diameter larger than the diameter of the inner core 4 is formed at the right end of the aforementioned inner core 4. When the inner core 4 is inserted into the aforementioned sleeve cavity 31, the inner core right end face extended flange 43 matches with the aforementioned inner core right end face extended flange matching cavity 331.

[0032] Depend on Figure 2 As shown, the aforementioned pair of first K-wire fixing holes 22 and the aforementioned second K-wire fixing hole 42 form a triangular position distribution relationship, and the triangle is an equilateral triangle, but can also be an isosceles triangle.

[0033] Weight-reducing through holes 44 are provided in the longitudinal direction of the inner core 4 and around the second K-wire fixing hole 42 . The weight-reducing through holes 44 pass through the supporting flange 41 .

[0034] See Figure 4 , the applicant combined Figures 1 to 3 Briefly describe the use of this utility model. Figure 4The drill rod 5 is shown in the figure. Since the drill rod 5 is fixed to a drill tool such as a pistol drill when in use, it can be called a rotary rod. The right end of the drill rod 5 is formed with a drill bit 51, and the drill bit 51 has a drill bit cavity 511. A chip discharge hole 5111 (also called a "chip discharge hole" or "chip guide hole") is opened on the bottom wall of the drill bit cavity 511. A serrated cutting edge 512 is formed on the right end face of the drill bit 51 and around the drill bit 51. Before using the drill rod 5, the utility model is first set at the patient's tibial plateau fracture site (commonly known as the knee). The specific process is as follows: first make an arthroscopic incision in the knee joint, clean the joint cavity, determine the fracture collapse site, and then extend the top hook 111 of the positioning arm 11 of the positioner 1 into the fracture point along the aforementioned opening. Specifically, the inclined surface 111 of the top hook is pressed against the collapsed fracture fragment of the joint surface. Since the aforementioned supporting flange 41 is simultaneously pressed against the outer side of the bone cortex at the distal end of the affected part of the bone fragment, the Kirschner wire insertion path can be defined between the two supporting points, namely the top hook 111 and the supporting flange 41, according to the surgical requirements. The optimal definition result of the Kirschner wire insertion path can be achieved by adjusting the aforementioned adjusting arm 12, that is, by adjusting the adjusting arm 12 in the adjusting slot 241 and locking it by the adjusting arm locking screw 242 after the adjustment is completed, thereby completing the positioning of the utility model. The above operation has accurately positioned the path of the first K-wire fixing hole 22 and the second K-wire fixing hole 42 (also called "K-wire guide hole"). Rotate or loosen the locking screw 242 to remove the locator 1 and free up the knee joint space. Because the K-wire at the first K-wire fixing hole 22 is fixed, the positioning device will not change after removing the locator 1. Figure 4 The drill rod 5 shown is mounted on a tool such as the pistol drill (electric drill) mentioned above. The drill bit 51 is inserted through the sleeve cavity 31 to perform windowing. That is, when the pistol drill is powered on, the drill rod 5 clamped thereto is rotated, and the serrated edge 512 of the drill bit 51 is used to drill a hole, i.e., to open a window. The chips generated during the windowing process pass through the drill cavity 511 and are discharged from the chip discharge hole 5111. After the windowing is completed, a push rod is inserted into the window to lift the fracture line, that is, to lift the collapsed bone block to achieve the reduction of the collapsed tibial plateau articular surface. Bone grafting is then performed at the distal end of the fracture to prevent the reduced articular surface from collapsing again. After the aforementioned actions are completed, the Kirschner wire previously inserted into the first Kirschner wire fixation hole 22 is removed, thereby removing the sleeve seat 2 and sleeve 3. The final fixation of the fracture is performed by a hollow nail or a fracture plate.

[0035] In summary, the technical solution provided by the present utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A minimally invasive surgical positioning and reduction device for tibial plateau fractures, characterized by: The invention relates to a tibial plateau fracture fixation device, comprising a positioner (1) composed of a position arm (11) and an adjusting arm (12) in an integral structure, the upper end of the position arm (11) and the adjusting arm (12) being connected by an arm connecting rod (13), the lower end of the position arm (11) and the lower end of the adjusting arm (12) being connected by an open joint (14), the lower end of the position arm (11) being provided with a hook (111) for abutting against the collapsed joint surface of the tibial plateau fracture in use, a sleeve base (2) and a sleeve (3), the sleeve base (2) being provided with a sleeve accommodating cavity (21) extending from the left end to the right end, the lower end of the adjusting arm (12) being inserted into the sleeve accommodating cavity (21) of the sleeve base (2) and being adjusted, a pair of first Kirschner wire fixing holes (22) being formed in the lower part of the sleeve base (2) and extending from the left end to the right end of the sleeve base (2) for the Kirschner wire to enter the bone cortex of the bone block in use, the sleeve (3) being inserted into the sleeve accommodating cavity (21) and being locked or unlocked by the sleeve adjusting and locking mechanism (23) arranged at the bottom of the sleeve base (2) and communicating with the sleeve accommodating cavity (21), an inner core (4) being inserted into the sleeve cavity (31) of the sleeve (3), the left end of the inner core (4) extending out of the sleeve cavity (31) and being provided with a supporting flange (41) for abutting against the outer side of the bone cortex away from the opposite side of the bone block in use, a second Kirschner wire fixing hole (42) being formed in the inner core (4) and extending through the inner core (4) and the supporting flange (41).

2. The minimally invasive surgical positioning and reduction device for tibial plateau fractures according to claim 1, wherein: The side surface of the hook (111) facing the open joint (14) is provided with a hook inclined surface (1111) for abutting against the collapsed joint surface of the tibial plateau fracture in use.

3. The minimally invasive surgical positioning and reduction device for tibial plateau fractures of claim 1, wherein: The side of the sleeve base (2) facing upward is provided with an adjusting arm sliding fitting arm (24), an adjusting groove (241) being formed in the front side of the adjusting arm sliding fitting arm (24), the adjusting arm (12) being inserted into the adjusting groove (241) and being locked or unlocked by the adjusting arm locking screw (242) arranged at the rear side of the adjusting arm sliding fitting arm (24).

4. The minimally invasive surgical positioning and reduction device for tibial plateau fractures of claim 1, wherein: A sleeve locking tongue hole (211) is formed in the cavity bottom wall of the sleeve accommodating cavity (21) of the sleeve base (2) for the sleeve accommodating cavity (21) to communicate with the outside, sleeve locking tongue fitting grooves (32) being formed in the outer wall of the side of the sleeve (3) and extending along the length direction of the sleeve (3) in a spaced state, the sleeve adjusting and locking mechanism (23) being arranged at the bottom of the sleeve base (2) corresponding to the sleeve locking tongue hole (211) and being locked or unlocked with the sleeve locking tongue fitting grooves (32).

5. A minimally invasive surgical positioning and reduction device for tibial plateau fractures as defined in claim 4, wherein: A sleeve adjusting locking mechanism seat (25) is formed at the bottom of the sleeve seat (2) and at the position corresponding to the sleeve locking tongue hole (211), the sleeve adjusting locking mechanism seat (25) has a sleeve adjusting locking mechanism matching cavity (251) which is communicated with the sleeve locking tongue hole (211) and the outside at the same time; the sleeve adjusting locking mechanism (23) comprises a sleeve locking tongue (231), a spring (232) and a spring limiting screw (233), which are sequentially arranged in the sleeve adjusting locking mechanism matching cavity (251) from top to bottom, and the sleeve locking tongue (231) is displaced up and down corresponding to the sleeve locking tongue hole (211), the lower end surface of the sleeve locking tongue (231) supports the upper end of the spring (232), the lower end of the spring (232) supports the spring limiting screw (233), and the spring limiting screw (233) is threadedly matched with the inner wall of the sleeve adjusting locking mechanism matching cavity (251); when the sleeve (3) is rotated to make the sleeve locking tongue matching groove (32) rotate away from the position corresponding to the sleeve locking tongue (231), the sleeve locking tongue (231) is pressed by the sleeve (3) and the spring (232) is compressed, the sleeve (3) is in a state of being released from being locked by the sleeve locking tongue (231) and is adjusted to slide left and right in the sleeve containing cavity (21); when the sleeve (3) is rotated to make the sleeve locking tongue matching groove (32) be in the position corresponding to the sleeve locking tongue (231), the spring (232) is released to push the sleeve locking tongue (231) upward and make the sleeve locking tongue (231) project out of the sleeve locking tongue hole (211) and cooperate with the sleeve locking tongue matching groove (32) to lock the sleeve (3).

6. A minimally invasive surgical positioning and reduction device for tibial plateau fractures as defined in claim 1, wherein: A sleeve limiting flange (33) with a diameter larger than the outer diameter of the sleeve (3) is formed at the right end of the sleeve (3), the left side surface of the sleeve limiting flange (33) abuts against the right side surface of the sleeve seat (2), an inner core right end surface extension flange matching cavity (331) is formed on the inner wall of the sleeve limiting flange (33) and around the circumferential direction of the sleeve limiting flange (33), an inner core right end surface extension flange (43) with a diameter larger than the diameter of the inner core (4) is formed at the right end of the inner core (4), when the inner core (4) is inserted into the sleeve cavity (31), the inner core right end surface extension flange (43) cooperates with the inner core right end surface extension flange matching cavity (331).

7. The minimally invasive surgical positioning and reduction device for tibial plateau fractures of claim 1, wherein: The pair of first Kirsch needle fixing holes (22) and the second Kirsch needle fixing hole (42) are distributed in a triangular relationship.

8. A minimally invasive surgical positioning and reduction device for tibial plateau fractures as defined in claim 7, wherein: The triangle is an equilateral triangle or an isosceles triangle.

9. The minimally invasive surgical positioning and reduction device for tibial plateau fractures of claim 1, wherein: A weight reduction through hole (44) is provided at intervals around the second Kirsch needle fixing hole (42) in the length direction of the inner core (4), and the weight reduction through hole (44) penetrates the abutting flange (41).

10. The minimally invasive surgical positioning and reduction device for tibial plateau fractures of claim 4, wherein: The sleeve locking tongue matching groove (32) is a circular arc groove.

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