An osteotomy device

Abstract

This invention relates to the field of medical device technology, specifically to an osteotomy surgical device, comprising a fixable guide pin, a fixing nut, an osteotomy guide plate, a slotter, an oscillating saw slot, and a retractor. In use, the fixable guide pin is first inserted through the tarsal canal, and the fixing nut is installed on the medial side of the foot. The depth of the entire tarsal canal is read using the first graduation mark on the fixable guide pin. The osteotomy guide plate is placed on the fixable guide pin, and 1.5mm Kirschner wires are inserted into the fixing holes on both sides for auxiliary fixation. Osteotomy is precisely performed with the assistance of the osteotomy guide plate. After osteotomy, the fixable guide pin and osteotomy guide plate are removed. The slotter is inserted into the osteotomy site and its bottom is tapped. The oscillating saw slot is inserted according to the length of the tarsal canal, and the oscillating saw is used. The retractor is inserted, and the handle is used to open the tarsal canal to the required angle, which is read from a graduated slide rail. This allows for precise positioning of the tarsal canal while meeting the osteotomy depth and opening angle requirements.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an osteotomy surgical device. Background Technology

[0002] Calcaneal neck osteotomy-lateral column lengthening surgery, also known as LCL surgery, is an effective treatment for flexible flat feet. In China, Evans osteotomy is a common surgical method for LCL. Hintermann osteotomy, as a type of LCL surgery, was first reported in 1999 and has been widely used abroad. The osteotomy method and spreading angle of this surgery conform to the anatomical characteristics of the subtalar joint, resulting in excellent clinical efficacy and significant importance for the correction of flat feet. It is widely used abroad, but rarely reported in China. Most domestic and international literature suggests that Hintermann osteotomy is more suitable for the treatment of flexible flat feet.

[0003] However, the Hintermann osteotomy requires precise positioning of the tarsal canal, while limiting the osteotomy depth, preserving the integrity of the medial wall of the calcaneus, and controlling the appropriate opening angle and distance during the osteotomy to effectively open the calcaneal neck while avoiding over-opening and causing excessive pressure on the calcaneocuboid joint. Current technology cannot meet the above requirements, so a surgical tool that can precisely position the tarsal canal and meet the requirements for osteotomy depth and opening angle is needed. Summary of the Invention

[0004] The purpose of this invention is to provide an osteotomy surgical device that can accurately locate the tarsal canal and meet the requirements for osteotomy depth and spreading angle.

[0005] To achieve the above objectives, the present invention provides an osteotomy surgical device, comprising a fixable guide pin, a fixing nut, an osteotomy guide plate, a slotter, a oscillating saw slot, and a spreader;

[0006] The fixable guide pin has a blunt head, threads, and a first graduation mark; the fixing nut is located on one side of the fixable guide pin; the osteotomy guide plate includes a guide plate base and two osteotomy guide plate wings; the guide plate base has a guide pin fixing hole, two fixing holes, and an osteotomy channel; the two osteotomy guide plate wings are respectively fixedly connected to the guide plate base and are respectively located on one side of the guide plate base; the slotter is located on one side of the osteotomy guide plate; the oscillating saw slot is located on one side of the slotter; the spreader includes two first triangular pentahedrons, two spreading arms, a graduated slide rail, and two handles; the two spreading arms are respectively fixedly connected to the two first triangular pentahedrons and are respectively located on one side of the two first triangular pentahedrons; the graduated slide rail is slidably connected to the two spreading arms and is located on the side of the two spreading arms; the two handles are respectively fixedly connected to the two spreading arms and are respectively located on one side of the two spreading arms.

[0007] The slotting device includes a second triangular pentahedron, a connecting rod, and a block base; the connecting rod is fixedly connected to the second triangular pentahedron and located on one side of the second triangular pentahedron; the block base is fixedly connected to the connecting rod and located on one side of the connecting rod.

[0008] The spreading arm has a sliding groove; the spreading device also includes two inclined rods and a push block; the two inclined rods are slidably connected to the two spreading arms respectively and pass through the two sliding grooves respectively; the push block is rotatably connected to the two inclined rods respectively and is located on one side of the two inclined rods.

[0009] The first triangular pentahedron has a second scale mark, which is located on the side of the first triangular pentahedron.

[0010] The spreading arm has a third scale mark, which is located on the side of the spreading arm.

[0011] This invention discloses an osteotomy surgical device. The fixable guide pin has a total length of 150mm and a diameter of 2.0mm; its tip is a blunt end; the front end has a 30mm long thread that can be fitted into a fixing nut; the surface of the fixable guide pin has a first scale marking with an accuracy of mm; the inner diameter of the fixing nut is 2.0mm, which can be fitted into the threaded portion of the fixable guide pin for fixation; the diameter of the fixing guide pin hole is 2.0mm, adapted to the diameter of the fixable guide pin; the diameter of the fixing hole is 1.5mm, used for auxiliary fixation; the osteotomy channel can insert an osteotomy saw blade for osteotomy following the direction of the fixable guide pin; the osteotomy guide plate wing is used to stabilize the saw blade, with a height of 5mm; the guide plate base has a height of 5mm; the length range of the oscillating saw groove is 150mm-400mm, selectable according to actual needs, used to limit the oscillating saw depth; the angles of the two first triangular pentahedrons are both 5 degrees; the graduated slide rail is arc-shaped, with the center of the arc located at the first... The tip of a triangular pentahedron allows the two spreading arms to separate along a graduated slide rail. The spreading angle can be read from the graduations on the slide rail. In use, the fixable guide pin is first inserted into the tarsal canal, and the fixing nut is installed on the medial side of the foot. The depth of the entire tarsal canal is read from the first graduation mark on the fixable guide pin. The osteotomy guide plate is then placed on the fixable guide pin, and a 1.5mm diameter plate is inserted into the fixing holes on both sides. Kirschner wires are used for fixation, and the osteotomy is performed precisely with the assistance of the osteotomy guide plate. After the osteotomy, the fixable guide wires and the osteotomy guide plate are removed, and the slotting device is placed at the osteotomy site and its bottom is tapped. The oscillating saw is inserted into the slot according to the length of the tarsal canal and the oscillating saw is used. The oscillating saw slot can limit the depth of the oscillating saw. The retractor is inserted and retracted with the handle, and the retractor is retracted to the required angle, which is read from the graduated slide rail. This allows for precise positioning of the tarsal canal and meets the requirements for osteotomy depth and retraction angle. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the fixed guide pin of an osteotomy surgical device provided by the present invention.

[0014] Figure 2 This is a schematic diagram of the structure of the fixing nut of an osteotomy surgical device provided by the present invention.

[0015] Figure 3This is a schematic diagram of the osteotomy guide plate of an osteotomy surgical device provided by the present invention.

[0016] Figure 4 This is a rear view of the osteotomy guide plate of an osteotomy surgical device provided by the present invention.

[0017] Figure 5 This is a side view of the osteotomy guide plate of an osteotomy surgical device provided by the present invention.

[0018] Figure 6 This is a schematic diagram of the slotting device of an osteotomy surgical apparatus provided by the present invention.

[0019] Figure 7 This is a schematic diagram of the oscillating saw slot of an osteotomy surgical device provided by the present invention.

[0020] Figure 8 This is a schematic diagram of the structure of the spreader of an osteotomy surgical device provided by the present invention.

[0021] In the diagram: 1-Fixed guide pin, 2-Fixed nut, 3-Osteotomy guide plate, 4-Grooving device, 5-Oscillating saw slot, 6-Spreader, 11-Thrust head, 12-Thread, 13-First scale mark, 31-Guide plate base, 32-Osteotomy guide plate wing, 311-Fixed guide pin hole, 312-Fixed hole, 313-Osteotomy channel, 41-Second triangular pentahedron, 42-Connecting rod, 43-Square base, 61-First triangular pentahedron, 62-Spreader arm, 63-Graded slide rail, 64-Handle, 65-Diagonal bar, 66-Push block, 611-Second scale mark, 621-Third scale mark, 622-Slide groove. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] Please see Figures 1 to 8 The present invention provides an osteotomy surgical device, comprising a fixable guide pin 1, a fixing nut 2, an osteotomy guide plate 3, a slotter 4, a oscillating saw slot 5, and a spreader 6;

[0024] The fixable guide pin 1 has a blunt end 11, a thread 12, and a first graduation mark 13; the fixing nut 2 is located on one side of the fixable guide pin 1; the osteotomy guide plate 3 includes a guide plate base 31 and two osteotomy guide plate wings 32; the guide plate base 31 has a guide pin fixing hole 311, two fixing holes 312, and an osteotomy channel 313; the two osteotomy guide plate wings 32 are respectively fixedly connected to the guide plate base 31 and are respectively located on one side of the guide plate base 31; the slotter 4 is located on one side of the osteotomy guide plate 3; the oscillating saw slot 5 is located on the slotter... The slot 4 is located on one side; the expander 6 includes two first triangular pentahedrons 61, two expanding arms 62, a graduated slide rail 63, and two handles 64; the two expanding arms 62 are fixedly connected to the two first triangular pentahedrons 61 respectively, and are located on one side of the two first triangular pentahedrons 61 respectively; the graduated slide rail 63 is slidably connected to the two expanding arms 62 respectively, and is located on the side of the two expanding arms 62; the two handles 64 are fixedly connected to the two expanding arms 62 respectively, and are located on one side of the two expanding arms 62 respectively.

[0025] In this embodiment, the total length of the fixable guide pin 1 is 150mm, and the diameter is 2.0mm; the tip is a blunt end 11; the front end has a 30mm long thread 12 that can be fitted into the fixing nut 2; the surface of the fixable guide pin 1 has a first scale mark 13 with an accuracy of mm; the inner diameter of the fixing nut 2 is 2.0mm, which can be fitted into the thread 12 portion of the fixable guide pin 1 for fixing; the diameter of the fixing guide pin hole 311 is 2.0mm, which matches the diameter of the fixable guide pin 1; the diameter of the fixing hole 312 is... 1.5mm, used for auxiliary fixation; the osteotomy channel 313 can insert the osteotomy saw blade, and osteotomy is performed in the direction of the fixed guide pin 1; the osteotomy guide plate wing 32 is used to stabilize the saw blade, and its height is 5mm; the guide plate base 31 has a height of 5mm; the length range of the oscillating saw groove 5 is 150mm-400mm, which can be selected according to actual needs, and is used to limit the oscillating saw depth; the angles of the two first triangular pentahedrons 61 are both 5 degrees, the graduated slide rail 63 is arc-shaped, and the center of the arc is at the tip of the first triangular pentahedron 61. The spreading arm 62 can be separated along the graduated slide rail 63. The spreading angle can be read according to the graduations on the graduated slide rail 63. A pivot is installed at the sliding connection between the spreading arm 62 and the graduated slide rail 63. In use, the fixable guide pin 1 is first inserted into the tarsal canal, and the fixing nut 2 is installed on the inner side of the foot. The depth of the entire tarsal canal is read through the first graduation mark 13 on the fixable guide pin 1. The osteotomy guide plate 3 is placed on the fixable guide pin 1, and the fixing holes on both sides are... A 1.5mm Kirschner wire is installed inside 312 for auxiliary fixation, and the osteotomy is precisely performed with the assistance of the osteotomy guide plate 3. After osteotomy, the fixable guide wire 1 and the osteotomy guide plate 3 are removed, and the slotter 4 is placed at the osteotomy site and its bottom end is tapped. The oscillating saw slot 5 is inserted according to the length of the tarsal tube and the oscillating saw is used. The oscillating saw slot 5 can limit the depth of the oscillating saw. The spreader 6 is inserted and spread open with the handle 64, and the spread open to the required angle is read from the graduated slide rail 63. This allows for precise positioning of the tarsal tube and meets the requirements for osteotomy depth and spread angle.

[0026] Furthermore, the slotting device 4 includes a second triangular pentahedron 41, a connecting rod 42, and a block base 43; the connecting rod 42 is fixedly connected to the second triangular pentahedron 41 and is located on one side of the second triangular pentahedron 41; the block base 43 is fixedly connected to the connecting rod 42 and is located on one side of the connecting rod 42.

[0027] In this embodiment, the angle of the second triangular pentahedron 41 is 10 degrees. The two first triangular pentahedrons 61 can be joined together to form the second triangular pentahedron 41. When the slotting device 4 is placed into the osteotomy site, the second triangular pentahedron 41 is placed into the osteotomy site and the block base 43 is struck.

[0028] Furthermore, the spreading arm 62 has a sliding groove 622; the spreader 6 also includes two diagonal rods 65 and a pusher block 66; the two diagonal rods 65 are slidably connected to the two spreading arms 62 respectively and pass through the two sliding grooves 622 respectively; the pusher block 66 is rotatably connected to the two diagonal rods 65 respectively and is located on one side of the two diagonal rods 65.

[0029] In this embodiment, if it is difficult to open the two opening arms 62, the push block 66 can be struck with a hammer, and the two diagonal rods 65 will open the two opening arms 62 to the sides.

[0030] Furthermore, the first triangular pentahedron 61 has a second scale mark 611, which is located on the side of the first triangular pentahedron 61.

[0031] In this embodiment, one of the first triangular pentahedrons 61 has the second scale mark 611 for precise surgical operation.

[0032] Furthermore, the spreading arm 62 has a third scale mark 621, which is located on the side of the spreading arm 62.

[0033] In this embodiment, one of the spreading arms 62 has the third scale mark 621 for precise surgical operation.

[0034] This invention discloses an osteotomy surgical device applicable to mainstream calcaneal neck osteotomy-lateral column lengthening surgery both domestically and internationally. It achieves accurate positioning and precise dilation. Simultaneously, it measures the tarsal canal length. The guide plate has a total length of 1 cm and includes the aforementioned oscillating saw groove 5, which acts as a barrier and depth limiter, effectively protecting the medial cortex of the calcaneus and medial tissues such as the flexor hallucis longus tendon, flexor digitorum longus tendon, medial plantar nerve, or tibialis posterior tendon. Previous dilators could not achieve arc-shaped dilation, potentially causing osteotomy line deviation and damage to the suspensory fossa and anterior mid-articular surfaces; this invention avoids this. The invention includes a graduated slide rail 63 for measuring angles, allowing for precise adjustment of the dilation angle based on preoperative imaging data. Using this invention simplifies the Hintermann osteotomy procedure, facilitating the widespread adoption of this surgical technique.

[0035] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A surgical device for osteotomy, characterized in that, Includes a fixed guide pin, a fixed nut, an osteotomy guide plate, a slotter, a oscillating saw slot, and a spreader; The fixable guide pin has a blunt head, threads, and a first graduation mark; the fixing nut is located on one side of the fixable guide pin; the osteotomy guide plate includes a guide plate base and two osteotomy guide plate wings; the guide plate base has a guide pin fixing hole, two fixing holes, and an osteotomy channel; the two osteotomy guide plate wings are respectively fixedly connected to the guide plate base and are respectively located on one side of the guide plate base; the slotter is located on one side of the osteotomy guide plate; the oscillating saw slot is located on one side of the slotter; the spreader includes two first triangular pentahedrons, two spreading arms, a graduated slide rail, and two handles; the two spreading arms are respectively fixedly connected to the two first triangular pentahedrons and are respectively located on one side of the two first triangular pentahedrons; the graduated slide rail is slidably connected to the two spreading arms and is located on the side of the two spreading arms; the two handles are respectively fixedly connected to the two spreading arms and are respectively located on one side of the two spreading arms; The fixed guide pin has a total length of 150mm and a diameter of 2.0mm; its tip is a blunt head; the front end has a 30mm long thread that can be fitted into the fixing nut; the fixed guide pin surface has first scale markings with an accuracy of mm; the fixing nut has an inner diameter of 2.0mm and can be fitted into the threaded portion of the fixed guide pin for fixing; the fixed guide pin hole has a diameter of 2.0mm, which matches the diameter of the fixed guide pin; the fixing hole has a diameter of 1.5mm for auxiliary fixing; the osteotomy channel can insert an osteotomy saw blade to perform osteotomy according to the direction of the fixed guide pin; the osteotomy guide plate wing is used to stabilize the saw blade and has a height of 5mm; the guide plate base has a height of 5mm; the length range of the oscillating saw slot is 150mm-400mm, which can be selected according to actual needs, and is used to limit the oscillating saw depth; the angles of the two first triangular pentahedrons are both 5 degrees; the graduated slide rail is arc-shaped, and the center of the arc is in the first triangular pentahedron. At the tip, the two spreading arms can separate along the graduated slide rail. The spreading angle can be read according to the graduations on the graduated slide rail. In use, first, the fixable guide pin is inserted into the tarsal canal, and the fixing nut is installed on the medial side of the foot. The depth of the entire tarsal canal is read through the first graduation mark on the fixable guide pin. The osteotomy guide plate is placed on the fixable guide pin, and 1.5mm Kirschner wires are placed in the fixing holes on both sides. With the aid of fixation, precise osteotomy is performed with the assistance of the osteotomy guide plate; after osteotomy, the fixable guide pin and the osteotomy guide plate are removed, the slotter is placed at the osteotomy site and the bottom is tapped; the oscillating saw is inserted into the slot according to the length of the tarsal canal and the oscillating saw is used, the oscillating saw slot can limit the oscillating saw depth; the retractor is inserted, the handle is used to retract it, and the retractor is retracted to the required angle, the angle is read from the graduated slide rail; thus, the tarsal canal can be accurately positioned, and the osteotomy depth and retraction angle are satisfied.

2. The osteotomy surgical device as described in claim 1, characterized in that, The slotting device includes a second triangular pentahedron, a connecting rod, and a block base; the connecting rod is fixedly connected to the second triangular pentahedron and is located on one side of the second triangular pentahedron; the block base is fixedly connected to the connecting rod and is located on one side of the connecting rod.

3. The osteotomy surgical device as described in claim 2, characterized in that, The spreading arm has a sliding groove; the spreader also includes two diagonal rods and a push block; the two diagonal rods are slidably connected to the two spreading arms respectively and pass through the two sliding grooves respectively; the push block is rotatably connected to the two diagonal rods respectively and is located on one side of the two diagonal rods.

4. The osteotomy surgical device as described in claim 3, characterized in that, The first triangular pentahedron has a second scale mark, which is located on the side of the first triangular pentahedron.

5. The osteotomy surgical device as described in claim 4, characterized in that, The spreading arm has a third scale mark, which is located on the side of the spreading arm.

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