An angle-adjustable closed osteotomy guide

Abstract

The present invention discloses an angle-adjustable closed osteotomy guide for lower limb force line correction surgery, which includes a fixed guide plate, an adjustment guide plate, a slide rail, a positioning Kirschner wire, a long locking rod, a positioning rod, and a short locking rod, which together form the angle-adjustable positioning osteotomy guide; the position of the fixed guide plate is determined according to the positioning rod and the positioning Kirschner wire, the position of the adjustment guide plate is determined according to the osteotomy angle and human bone difference data, the position of the adjustment guide plate is fixed by the long locking rod and the short locking rod, and the position is fixed by the positioning Kirschner wire; "three-knife" accurate osteotomy is performed according to the guide slits of the fixed guide plate and the guide slits of the adjustment guide plate; according to CT data, the present invention can assist doctors in performing accurate positioning and precise osteotomy during surgery, greatly reducing the position error and angle error of osteotomy.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, in particular to an angle-adjustable closed osteotomy guide. Background Art

[0002] The lower limbs support the human body and are of great significance to the daily activities of the human body. The body weight is transferred to the ground through the bones of the lower limbs. Abnormal force lines of the lower limbs will accelerate the wear of the articular cartilage, leading to the occurrence of osteoarthritis, which can cause disability in severe cases. For example, "O-shaped legs" and "X-shaped legs" will accelerate the wear of the cartilage on the medial and lateral articular surfaces of the knee joint, and subsequently osteoarthritis will occur. Osteotomy is an important method to correct the force line of the lower limbs. By cutting out wedge-shaped bone blocks and closing the broken ends of the bones, the force line of the lower limbs is corrected to correct deformities and prevent and treat osteoarthritis. Designing an accurate osteotomy guide based on the position and angle of the osteotomy is of great significance to improving clinical efficacy. Summary of the Invention

[0003] The present invention provides an angle-adjustable closed osteotomy guide for patients with unreasonable lower limb force lines and patients with "X-shaped legs" or "O-shaped legs" undergoing osteotomy surgery.

[0004] The technical solution adopted by the present invention is as follows: an angle-adjustable closed osteotomy guide includes a fixed guide plate, an adjustment guide plate, a positioning Kirschner wire, a long locking rod, a positioning rod, a short locking rod, and a slide rail; the positioning rod is installed through the positioning rod mounting hole, and the positioning Kirschner wire is positioned through the positioning hole at the fixed end of the Kirschner wire and the positioning hole at the movable end of the Kirschner wire; the contact parts of the long locking rod and the short locking rod with the slide rail are eccentric cylinders, and the fixed guide plate and the adjustment guide plate are fixed to the slide rail by friction using the long locking rod and the short locking rod respectively, forming a whole that can be used normally; the long locking rod and the short locking rod have hexagonal holes and weight-reducing holes; the slide rail has a boss that matches the vertical slide and the arc slide, so that the adjustment guide plate can move horizontally in the vertical direction and slide along the arc. According to the CT data of the patient's lower limbs, the degree of correction of the lower limbs is obtained. The fixed guide plate, the adjustment guide plate, the slide rail, the positioning Kirschner wire, the long locking rod, the positioning rod, and the short locking rod together constitute the angle-adjustable positioning osteotomy guide. The position of the fixed guide plate is determined by the positioning rod and positioning Kirschner wire. The position of the adjustable guide plate is determined based on the osteotomy angle and human anatomy data. The long and short locking rods are used to fix the adjustable guide plate in position, and the positioning Kirschner wire is used to reinforce the position. Accurate "three-knife" osteotomy is performed based on the guide gaps of the fixed and adjustable guide plates. The geometric principle is as follows: with the fixed tool path (D1) as the reference, the default osteotomy length is L1, and the osteotomy length range is L1 to L1+ΔL; the osteotomy angle range is 4° to θ; the angle of the adjustable tool path (D2) is changed by moving along the arc slide (B2), and the osteotomy length of the adjustable tool path (D2) is changed by moving along the vertical slide (A2).

[0005] Furthermore, the fixed guide plate includes a long locking rod locking hole, a vertical slide, an upper short guide slit, a fixed guide slit, a Kirschner wire fixed end positioning hole, a positioning rod mounting hole, and a fixed guide plate bone curve; the length of the vertical slide meets the difference in osteotomy width for people of different heights and genders, making the device more applicable; the upper short guide slit and the fixed guide slit form a certain angle, so that a closed guide bone block is reserved after osteotomy; the positioning rod mounting hole and the upper short guide slit have a certain vertical distance, so that a closed guide bone block is reserved after osteotomy. The adjustment guide plate includes a short locking rod locking hole, an arc slide, an upper long guide slit, an adjustment guide slit, a Kirschner wire movable end positioning hole, and an adjustment guide plate bone curve; the arc slide radius meets the human osteotomy size; the width of the upper long guide slit meets the requirements, and the upper cutting path can be completed at the maximum and minimum osteotomy angles respectively.

[0006] The length of the vertical slide meets the difference in osteotomy width for people of different heights and genders, and the example slide rail length is 20mm; the upper short guide slit and the fixed guide slit form a certain angle, and the example angle is 110°; the positioning rod mounting hole and the upper short guide slit have a certain vertical distance, and the example vertical distance is 4mm; there is a group of Kirschner wire fixed end positioning holes on the fixed guide slit; the axes of the three groups of Kirschner wire fixed end positioning holes are staggered with each other.

[0007] The arc-shaped slide radius meets the human osteotomy size, with an example radius of 58mm. The upper guide slit width meets the required width, allowing for upper cuts at both the maximum and minimum osteotomy angles. The adjustment guide slit features a set of fixed K-wire positioning holes; the axes of the three sets of K-wire positioning holes for the movable ends intersect.

[0008] The fixed guide slit has a set of K-wire positioning holes, with the axes of the three sets of K-wire positioning holes intersecting. The adjustable guide slit has a set of K-wire positioning holes, with the axes of the three sets of K-wire positioning holes intersecting. The purpose of intersecting the positioning holes is to ensure that the device is fixed after the K-wires are positioned. The fixed guide plate and the adjustable guide plate bone contact curves are designed to ensure accurate positioning of the device against the bone.

[0009] The positioning rod is installed through the positioning rod mounting hole, and the positioning Kirschner wire is positioned through the positioning hole at the fixed end of the Kirschner wire and the positioning hole at the movable end of the Kirschner wire. The fixed guide plate and the adjustment guide plate are fixed on the slide rail using a long locking rod and a short locking rod respectively, forming a whole that can be used normally.

[0010] Furthermore, the contact areas between the long and short locking rods and the slide rails are eccentric cylinders; each has a hexagonal socket and a weight-reducing hole. The slide rails have bosses that match the vertical and arc-shaped slideways, allowing the adjustment guide plate to translate vertically and slide along an arc.

[0011] The beneficial effect of the present invention is that: based on CT data, the present invention can assist doctors in performing accurate positioning and precise osteotomy during surgery, greatly reducing the position error and angle error of osteotomy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an overall schematic diagram of an angle-adjustable closed osteotomy guide of the present invention.

[0013] Figure 2 It is a schematic diagram of the geometric principle of an angle-adjustable closed osteotomy guide of the present invention.

[0014] Figure 3 The present invention is a schematic diagram of an angle-adjustable closed osteotomy guide for osteotomy.

[0015] Figure 4 The present invention is a schematic diagram of an angle-adjustable closed osteotomy guide fixed guide plate.

[0016] Figure 5 The present invention is a schematic diagram of an angle-adjustable closed osteotomy guide adjusting guide plate.

[0017] Figure 6 The present invention is a schematic diagram of a long locking rod and a short locking rod of an angle-adjustable closed osteotomy guide.

[0018] Figure 7 It is a schematic diagram of an angle-adjustable closed osteotomy guide slide rail of the present invention.

[0019] Figure 8 The present invention is a schematic diagram of an osteotomy tool path and a wedge block of an angle-adjustable closed osteotomy guide.

[0020] The markings in the figure are: A, fixed guide plate; B, adjustment guide plate; C, positioning K-wire; D, long locking rod; E, positioning rod; F, short locking rod; G, slide rail; A1, long locking rod locking and fixing hole; A2, vertical slide; A3, upper short guide slit; A4, fixed guide slit; A5, K-wire fixed end positioning hole; A6, positioning rod mounting hole; A7, fixed guide plate bone-fitting curve; B1, short locking rod locking and fixing hole; B2, arc slide; B3, upper long guide slit; B4, adjustment guide slit; B5, K-wire moving end positioning hole; B6, adjustment guide plate bone-fitting curve; D1, fixed tool path; D2, adjustment tool path; D3, upper tool path. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] This embodiment is an angle-adjustable closed osteotomy guide. Another angle-adjustable closed osteotomy guide has a symmetrical structure to this guide and has the same usage.

[0023] like Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, this example provides an angle-adjustable closed osteotomy guide, including: a fixed guide plate A, an adjustment guide plate B, a positioning Kirschner wire C, a long locking rod D, a positioning rod E, a short locking rod F, a slide rail G, a long locking rod locking and fixing hole A1, a vertical slide A2, an upper short guide slit A3, a fixed guide slit A4, a Kirschner wire fixed end positioning hole A5, a positioning rod mounting hole A6, a fixed guide plate bone-fitting curve A7, a short locking rod locking and fixing hole B1, an arc slide B2, an upper long guide slit B3, an adjustment guide slit B4, a Kirschner wire movable end positioning hole B5, an adjustment guide plate bone-fitting curve B6, a fixed tool path D1, an adjustment tool path D2, and an upper tool path D3.

[0024] The positioning rod is installed through the positioning rod mounting hole, and the positioning Kirschner wire is positioned through the positioning hole at the fixed end of the Kirschner wire and the positioning hole at the movable end of the Kirschner wire; the contact parts of the long locking rod and the short locking rod and the slide rail are eccentric cylinders, and the long locking rod and the short locking rod are used to fix the fixed guide plate and the adjustment guide plate on the slide rail respectively by friction, forming a whole that can be used normally; there are hexagonal holes and weight-reducing holes on the long locking rod and the short locking rod; the slide rail has a boss that matches the vertical slide and the arc slide, so that the adjustment guide plate can move horizontally in the vertical direction and slide along the arc.

[0025] The fixed guide plate includes a long locking rod locking hole, a vertical slide, an upper short guide slit, a fixed guide slit, a Kirschner wire fixed end positioning hole, a positioning rod mounting hole, and a fixed guide plate bone curve. The length of the vertical slide meets the differences in osteotomy widths for people of different heights and genders, making the device more applicable. The upper short guide slit forms a certain angle with the fixed guide slit, allowing for a closed guide bone block to be reserved after osteotomy. The positioning rod mounting hole is a certain vertical distance from the upper short guide slit, allowing for a closed guide bone block to be reserved after osteotomy. The adjustable guide plate includes a short locking rod locking hole, an arc slide, an upper long guide slit, an adjustable guide slit, a Kirschner wire movable end positioning hole, and an adjustable guide plate bone curve. The arc slide radius meets the human osteotomy size. The width of the upper long guide slit meets the requirements, allowing for the completion of the upper cut at both the maximum and minimum osteotomy angles.

[0026] The fixed guide slit has a set of K-wire positioning holes, with the axes of the three sets of K-wire positioning holes intersecting. The adjustable guide slit has a set of K-wire positioning holes, with the axes of the three sets of K-wire positioning holes intersecting. The purpose of intersecting the positioning holes is to ensure that the device is fixed after the K-wires are positioned. The fixed guide plate and the adjustable guide plate bone contact curves are designed to ensure accurate positioning of the device against the bone.

[0027] The angle-adjustable positioning osteotomy guide can accurately position and assist doctors in precise osteotomy, with small osteotomy errors and good treatment effects.

[0028] In this embodiment, the doctor obtains the required osteotomy angle and position based on the patient's CT data. After opening the incision, the doctor uses the positioning rod to determine the boundary position of the upper knife path, and at the same time, the bone curve and the bone are aligned to ensure the accurate positioning of the device. Then, the positioning Kirschner wire is used to fix the position of the fixed guide plate; according to the insertion depth of the Kirschner wire, the osteotomy depth and the position of the adjustment guide plate on the vertical slide are adjusted and locked with a long locking rod; according to the angle of the osteotomy, the position of the adjustment guide plate on the arc slide is adjusted and locked with a short locking rod; the positioning Kirschner wire is inserted into the adjustment guide plate to reinforce the fixation; the positioning Kirschner wire in the guide slit is pulled out; according to the guide slit of the osteotomy guide and the measured insertion depth, the three knife paths of fixed knife path, adjustment knife path and upper knife path, as well as the "three-knife osteotomy" are completed; after completing the knife path, all the positioning Kirschner wires are pulled out, the osteotomy guide is removed, and finally the final surgical operation process is carried out.

[0029] In another embodiment, the doctor obtains the required osteotomy angle and osteotomy position based on the patient's CT data. After opening the incision, the position of the adjustment guide plate on the arc slide is adjusted according to the osteotomy angle and locked with a short locking rod; the boundary position of the upper knife path is determined by the positioning rod, and the bone curve is aligned with the bone to ensure the accurate positioning of the device, and then the position of the fixed guide plate is fixed with a positioning Kirschner wire; according to the insertion depth of the Kirschner wire, the osteotomy depth and the position of the adjustment guide plate on the vertical slide are adjusted and locked with a long locking rod; the positioning Kirschner wire is inserted into the adjustment guide plate for reinforcement and fixation; the positioning Kirschner wire in the guide slit is pulled out; according to the guide slit of the osteotomy guide and the measured insertion depth, the three knife paths of fixed knife path, adjustment knife path and upper knife path, as well as the "three-knife osteotomy" are completed, and the osteotomy block is ensured to have isosceles characteristics; after completing the knife path, all the positioning Kirschner wires are pulled out, the osteotomy guide is removed, and finally the final surgical operation process is carried out.

[0030] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An angle-adjustable closed osteotomy guide, characterized by: The invention comprises a fixed guide plate (A), an adjustable guide plate (B), a positioning Kirschner wire (C), a long locking rod (D), a positioning rod (E), a short locking rod (F) and a slide rail (G); the positioning rod (E) is installed through the positioning rod mounting hole, the positioning Kirschner wire (C) is positioned through the positioning hole (A5) at the fixed end of the Kirschner wire and the positioning hole (B5) at the movable end of the Kirschner wire, and the fixed guide plate and the adjustable guide plate are fixed to the slide rail by friction using the long locking rod and the short locking rod respectively, forming a whole that can be used normally; the fixed guide plate (A) guides to complete the fixed tool path (D1); the adjustable guide plate (B) guides to complete the adjustable tool path (D2); the fixed guide plate (A) and the adjustable guide plate (B) are combined to complete the upper tool path (D3); The contact parts of the long locking rod (D), the short locking rod (F) and the slide rail (G) are eccentric cylinders; the long locking rod (D) and the short locking rod (F) are provided with hexagonal holes and weight-reducing holes; the slide rail (G) has a boss that matches the vertical slideway (A2) and the arc slideway (B2), so that the adjustment guide plate (B) can move horizontally in the vertical direction and slide along the arc.

2. The angle-adjustable closed osteotomy guide according to claim 1, characterized in that: The fixed guide plate (A) includes a long locking rod locking hole (A1), a vertical slide (A2), an upper short guide slit (A3), a fixed guide slit (A4), a Kirschner wire fixed end positioning hole (A5), a positioning rod mounting hole (A6) and a fixed guide plate bone-fitting curve (A7); the upper short guide slit (A3) forms a certain angle with the fixed guide slit (A4); the positioning rod mounting hole (A6) and the upper short guide slit (A3) have a certain vertical distance; a group of Kirschner wire fixed end positioning holes are provided on the fixed guide slit (A4); and the axes of the three groups of Kirschner wire fixed end positioning holes (A5) are staggered.

3. The angle-adjustable closed osteotomy guide according to claim 1, characterized in that: The adjustment guide plate (B) includes a short locking rod locking and fixing hole (B1), an arc slide (B2), an upper long guide slit (B3), an adjustment guide slit (B4), a Kirschner wire movable end positioning hole (B5), and an adjustment guide plate bone-adhering curve (B6); the radius of the arc slide (B2) meets the human osteotomy size; the width of the upper long guide slit (B3) meets the requirements and can complete the upper tool path (D3) at the maximum osteotomy angle and the minimum osteotomy angle respectively; a group of Kirschner wire fixed end positioning holes are provided on the adjustment guide slit (B4); and the axes of the three groups of Kirschner wire movable end positioning holes (B5) are staggered with each other.

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