Kirschner wire-assisted guided diaphyseal fracture surgical reduction device

Abstract

The present invention relates to the field of biomedical device technology. A Kirschner wire-assisted guided diaphyseal fracture surgical reduction device comprises a reduction forceps body, the reduction forceps body comprising an upper splint and a lower splint arranged above and below, and a guide assembly, the guide assembly comprising a guide sleeve and a locking nut for limiting and fixing the guide sleeve on the upper splint, the bottom of the guide sleeve being provided with an outer protrusion; a guide hole being provided in the guide sleeve; a slide groove for slidingly connecting the guide assembly being provided on the upper splint, the slide groove being open at both the upper and lower ends, the slide groove being slidably connected to the guide sleeve, and the locking nut being threadedly connected to the guide sleeve; a strip-shaped opening being provided on the lower splint, the strip-shaped opening being arranged correspondingly to the slide groove above and below. This patent optimizes the structure of the reduction forceps, and guides the drill bit through a combination of the guide assembly, the slide groove, and the strip-shaped opening to prevent the drill bit from being displaced, thereby facilitating the fixation of diaphyseal fractures with Kirschner wires and further avoiding displacement.

Description

Technical Field

[0001] The present invention relates to the technical field of biomedical devices, in particular to a Kirschner wire-assisted guided vertebral fracture surgical reduction device. Background Art

[0002] A fracture refers to a complete or partial break in the continuity of the bone structure. Most fractures are caused by high-energy injuries and occur more frequently in young and elderly people. Studies have found that patients often suffer from a single fracture, while some suffer from multiple fractures. If the fracture is treated appropriately and promptly, most patients can recover to their original state and function.

[0003] The backbone is a part that is extremely prone to fractures. Fractures in the backbone greatly affect the patient's function and often require surgical treatment. Most of the time, reduction forceps are used to clamp and reduce the fracture site to maintain the shape of the backbone. Then, steel plates and steel nails are implanted in the fracture site for strong fixation to ensure the stability of the fracture site and ensure postoperative functional recovery.

[0004] Existing reduction forceps (such as the one disclosed in Publication No. CN209645045U for diaphyseal fracture surgery) address the following issues with conventional reduction forceps: 1) They are complex in structure and simple in function. The engagement area of ​​the reduction forceps lacks concave and convex grooves, resulting in insufficient engagement force. This leads to slippage upon contact with the diaphyseal fracture, making it difficult to fix and potentially causing displacement of the fracture ends. 2) After reduction and fixation of the fracture, the surgeon still needs to hold the reduction forceps in their hands, and they cannot be locked automatically, making them inconvenient to use.

[0005] However, the drilling cannot be guided, nor can the corresponding angle of guidance be obtained. The drilling and Kirschner wire fixation are prone to displacement or even deviation, making it difficult to obtain effective fixation. In addition, the long-term reduction and fixation operation and maintenance state will increase the trauma of the tissues around the fracture, causing discomfort to the patient and increasing the patient's painful experience. Summary of the Invention

[0006] In response to the problems existing in the prior art, the present invention provides a Kirschner wire-assisted guided diaphyseal fracture surgical reduction device to solve at least one of the above technical problems.

[0007] In order to achieve the above-mentioned object, the present invention provides a Kirschner wire-assisted guided vertebral fracture surgical reduction device, comprising a reduction forceps body, the reduction forceps body comprising an upper splint and a lower splint arranged above and below, the reduction forceps further comprising a first clamp handle and a second clamp handle hinged to each other, the first clamp handle being connected to the upper splint, the second clamp handle being connected to the lower splint, and the first clamp handle and the second clamp handle being connected via a locking mechanism, characterized in that the present invention further comprises a guide assembly, the guide assembly comprising a guide sleeve and a locking nut for fixing the guide sleeve to the upper splint, the bottom of the guide sleeve being provided with an outer protrusion;

[0008] A guide hole is provided in the guide sleeve;

[0009] The upper clamping plate is provided with a sliding groove for sliding connection with the guide assembly, the sliding groove is open at the upper and lower ends, the sliding groove is slidably connected to the guide sleeve, and the locking nut is threadedly connected to the guide sleeve;

[0010] The lower clamping plate is provided with a strip-shaped opening, and the strip-shaped opening is arranged correspondingly to the sliding groove up and down.

[0011] This patent optimizes the structure of the reduction forceps and guides the drill bit through a combination of a guide component, a slide groove and a strip opening to prevent the drill bit from shifting, making it easier to fix the diaphyseal fracture with a Kirschner wire and further avoiding displacement, thereby greatly saving operation time and improving the operational efficiency of Kirschner wire fixation.

[0012] Further preferably, the outer wall of the outer protrusion includes two mutually parallel planes;

[0013] The plane is a contact surface that is slidably connected to the sliding groove.

[0014] Prevent the guide sleeve from rotating in the slideway.

[0015] Further preferably, the angle between the central axis of the guide hole and the central axis of the outer wall of the guide sleeve is 0°-45°.

[0016] It is convenient to guide the wire in different inclination directions. When the K-wire needs to be inserted at a specific inclination angle, select the guide hole with the corresponding inclination angle.

[0017] Alternatively, the central axis of the outer wall of the guide sleeve is parallel to the central axis of the guide hole;

[0018] A spacer is also sleeved on the outer wall of the guide sleeve, and the nut abuts against the spacer.

[0019] The nut is convenient for limiting and fixing the inclined guide sleeve.

[0020] The adjustable sleeve further comprises a sliding portion and an adjusting portion, wherein the sliding portion and the adjusting portion are connected via an angle adjustment mechanism, wherein the sliding portion and the adjusting portion are provided with mutually communicating through holes, and the through holes of the sliding portion and the adjusting portion are mutually communicating to form an adjustable guide hole;

[0021] The cross section of the through hole of the sliding portion is oval-shaped;

[0022] A protrusion is provided at the bottom of the sliding portion, the sliding portion is slidably connected to the sliding groove, and the sliding portion and the sliding groove are rotationally engaged.

[0023] It is convenient to adjust the guiding angle of the guide sleeve according to different needs.

[0024] Further preferably, the angle adjustment mechanism includes a screw, and the sliding portion and the adjustment portion are both provided with a shaft hole for passing the screw;

[0025] The rotating shaft holes of the sliding portion and the adjusting portion are passed through the screws for locking.

[0026] The outer wall of the sliding part where the rotating shaft hole is opened is provided with a reference line;

[0027] An angle marking line is provided on the outer wall of the adjusting portion where the rotating shaft hole is provided.

[0028] It is convenient for intuitive observation of the relative rotation angle between the sliding part and the adjusting part.

[0029] Further preferably, the length direction of the slide groove of the upper clamping plate is the left-right direction;

[0030] Also included is a replacement splint set, the replacement splint set including an auxiliary upper splint and an auxiliary lower splint arranged above and below;

[0031] The auxiliary upper clamping plate is provided with an auxiliary sliding groove for sliding connection with the guide sleeve, and the guiding direction of the auxiliary sliding groove forms an acute angle or a right angle with the left and right directions;

[0032] The auxiliary lower splint is provided with an auxiliary strip-shaped opening corresponding to the upper and lower portions of the auxiliary chute;

[0033] The auxiliary upper clamping plate and the auxiliary lower clamping plate are detachably connected to the first clamp handle and the second clamp handle.

[0034] It is convenient to disassemble and combine different splints.

[0035] Further preferably, the locking mechanism comprises an arc-shaped connecting rod, the lower end of the connecting rod is fixedly connected to the second clamp handle, and the upper end of the connecting rod is provided with a threaded groove;

[0036] The first clamp handle is provided with a channel for a connecting rod to pass through, and the connecting rod passes through the channel and is connected to a nut.

[0037] It is convenient to realize relative limiting locking of the first clamp handle and the second clamp handle, thereby realizing the upper clamp plate and the lower clamp plate.

[0038] Further preferably, a rubber sheath is glued to the right end of the first pliers handle and the second pliers handle.

[0039] Further preferably, the inner sides of the upper clamping plate and the lower clamping plate are provided with concave and convex grooves, which facilitate clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a structural diagram of a specific embodiment 1 of the present invention;

[0041] Figure 2 For the present invention Figure 1 A partial enlarged view of point A in the middle;

[0042] Figure 3 A top view of a specific embodiment 1 of the present invention;

[0043] Figure 4 is another top view of specific embodiment 1 of the present invention;

[0044] Figure 5 A cross-sectional view of a guide sleeve according to a specific embodiment 1 of the present invention;

[0045] Figure 6 A cross-sectional view of the guide sleeve fitting portion of the second embodiment of the present invention;

[0046] Figure 7 This is a structural schematic diagram of an adjustable guide sleeve according to a specific embodiment 1 of the present invention;

[0047] Figure 8 This is a schematic diagram of the rotational engagement of the limiting portion of the specific embodiment 1 of the present invention.

[0048] Among them: 1 is the first clamp handle; 2 is the limit block; 3 is the nut; 4 is the rubber sheath; 5 is the threaded groove; 6 is the connecting rod; 7 is the second clamp handle; 8 is the rotating shaft; 9 is the lower clamp plate; 10 is the outer protrusion; 11 is the upper clamp plate; 12 is the guide sleeve; 13 is the locking nut; 14 is the concave and convex groove, 15 is the guide hole, 16 is the pad, 17 is the sliding part, 18 is the adjustment part, and 20 is the limit part. DETAILED DESCRIPTION

[0049] The present invention will be further described below with reference to the accompanying drawings.

[0050] Specific embodiment 1, see Figures 1 to 8The device for reducing a vertebral fracture surgery assisted by a Kirschner wire comprises a reduction forceps body, the reduction forceps body comprises an upper splint 11 and a lower splint 9 arranged above and below, the reduction forceps further comprises a first handle 1 and a second handle 7 hinged to each other via a rotating shaft 8, the first handle 1 is connected to the upper splint 11, the second handle 7 is connected to the lower splint 9, and the first handle 1 and the second handle 7 are connected via a locking mechanism, and further comprises a guide assembly, the guide assembly comprises a guide sleeve 12 and a locking nut 13 for limiting and fixing the guide sleeve 12 on the upper splint 11, an outer protrusion 10 is provided at the bottom of the guide sleeve 12; a guide hole for guiding the direction of a drill bit is provided in the guide sleeve 12; a slide groove for slidingly connecting the guide assembly is provided on the upper splint 11, the slide groove is opened at the top and bottom, the slide groove is slidably connected to the guide sleeve 12, and the locking nut 13 is threadedly connected to the guide sleeve 12. Figure 2 B in the figure. A strip-shaped opening is formed on the lower splint 9, and the strip-shaped opening is arranged in correspondence with the upper and lower chute. This patent optimizes the structure of the reduction forceps. Through the combination of the guide assembly, chute, and strip-shaped opening, the drill bit is guided (the K-wire is also guided within the guide sleeve), preventing the drill bit from shifting. This facilitates K-wire fixation of diaphyseal fractures, further avoiding displacement, significantly saving operation time, and improving the efficiency of K-wire fixation.

[0051] The locking mechanism includes an arcuate connecting rod 6, the lower end of which is fixedly connected to the second clamp handle 7. A limit block 2 is located at the top of the connecting rod 6, and a threaded groove 5 is provided at the upper end of the connecting rod 6. A passage for the connecting rod 6 is provided in the first clamp handle 1, through which the connecting rod 6 passes and is connected to a nut 3. This facilitates relative locking of the first and second clamp handles 1 and 7, thereby securing the upper clamp plate 11 and lower clamp plate 9. A rubber sheath 4 is glued to the right ends of the first and second clamp handles 1 and 7. Concave and convex grooves 14 are located on the inner sides of the upper clamp plate 11 and lower clamp plate 9, allowing for easy clamping.

[0052] The outer wall of the outer protrusion 10 includes two parallel planes, which are contact surfaces that are slidably connected to the chute, preventing the guide sleeve 12 from rotating in the chute.

[0053] There are several solutions for the guide sleeve 12:

[0054] Option 1:

[0055] See also Figure 5 The included angle between the central axis of the guide hole 15 and the central axis of the outer wall of the guide sleeve 12 is 0°-45°. This facilitates guidance in different tilt directions. When the K-wire needs to be inserted at a specific tilt angle, a guide hole with the corresponding tilt angle is selected.

[0056] Option 2:

[0057] See also Figure 6The central axis of the outer wall of the guide sleeve 12 is parallel to the central axis of the guide hole; a spacer is also sleeved on the outer wall of the guide sleeve 12, and the nut abuts against the spacer 16. This facilitates the nut to achieve the limited fixation of the inclined guide sleeve 12. The lower surface of the spacer abuts against the upper side of the upper splint, and the upper surface of the spacer abuts against the nut. The angle between the upper surface of the spacer and the lower surface of the spacer is an acute angle. The central axis of the guide hole is inclined. That is, the central axis of the guide hole forms an acute angle with the upper surface of the upper splint.

[0058] See also Figure 7 Alternatively, an adjustable sleeve with adjustable guide angle can be used. Specifically, the adjustable sleeve includes a sliding portion and an adjusting portion 18. The sliding portion 17 and the adjusting portion 18 are connected by an angle adjustment mechanism. The sliding portion 17 and the adjusting portion 18 have interconnecting through-holes. The interconnected through-holes of the sliding portion 17 and the adjusting portion 18 form an adjustable guide hole for guiding the direction of the drill bit. The through-hole of the sliding portion 17 has a rounded cross-section. The length of the rounded hole is parallel to the rotational centerline of the sliding and adjusting portions. A protrusion is provided at the bottom of the sliding portion 17. The sliding portion 17 is slidably connected to the chute, and the sliding portion and the chute are rotatably engaged. Regarding the rotatable engagement structure, the chute comprises an upper portion, a middle portion, and a lower portion from top to bottom. The sliding portion comprises upper and lower cylindrical portions and a stop portion. The outer diameter of the cylindrical portion matches the width of the upper portion. The stop portion has a rectangular cross-section with rounded corners. The distance between the long sides of the rectangle matches the width of the middle portion, and the length of the short sides of the rectangle is greater than the width of the upper portion. It is convenient to realize the rotation and locking of the sliding part in the sliding groove. The lower part is a channel for the nail to pass through. The width of the lower part can match the width of the upper part. Figure 8 The limiting part 20 on the left side of the arrow is a schematic diagram of the state of sliding into the slide groove, and the limiting part on the right side of the arrow is a schematic diagram of the state of rotating and locking in the slide groove. The waist-round hole on the limiting part is not shown. The angle adjustment mechanism includes a screw, and the sliding part 17 and the adjusting part 18 are both provided with a shaft hole for passing the screw; the shaft holes of the sliding part 17 and the adjusting part 18 are locked through the screw. There are two screws, which are arranged opposite to each other. The outer wall of the sliding part 17 where the shaft hole is provided is provided with a reference line; the outer wall of the adjusting part 18 where the shaft hole is provided is provided with an angle marking line. It is convenient for intuitive observation of the relative rotation angle of the sliding part 17 and the adjusting part 18.

[0059] Specific embodiment 2, based on specific embodiment 1, the longitudinal direction of the slide groove of the upper clamping plate is the left-right direction; the replacement clamping plate group is further included, and the replacement clamping plate group includes an auxiliary upper clamping plate and an auxiliary lower clamping plate arranged above and below; the auxiliary upper clamping plate is provided with an auxiliary slide groove for sliding connection with the guide sleeve, the auxiliary slide groove is open above and below, and the guiding direction of the auxiliary slide groove forms an acute angle or a right angle with the left-right direction; the auxiliary lower clamping plate is provided with auxiliary strip-shaped openings arranged above and below the auxiliary slide groove; the auxiliary upper clamping plate and the auxiliary lower clamping plate are detachably connected to the first clamp handle and the second clamp handle, so as to facilitate the disassembly and combination of different clamping plates.

[0060] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A Kirschner wire-assisted guided diaphyseal fracture surgical reduction device, comprising a reduction forceps body, the reduction forceps body comprising an upper splint and a lower splint arranged above and below, the reduction forceps further comprising a first handle and a second handle hinged to each other, the first handle being connected to the upper splint, the second handle being connected to the lower splint, and the first handle and the second handle being connected by a locking mechanism, characterized in that: The guide assembly further comprises a guide sleeve and a locking nut for fixing the guide sleeve to the upper clamping plate, wherein the bottom of the guide sleeve is provided with an outer protrusion; A guide hole is provided in the guide sleeve; The upper clamping plate is provided with a sliding groove for sliding connection with the guide assembly, the sliding groove is open at the upper and lower ends, the sliding groove is slidably connected to the guide sleeve, and the locking nut is threadedly connected to the guide sleeve; The lower splint is provided with a strip-shaped opening, and the strip-shaped opening is arranged correspondingly to the sliding groove above and below; The adjustable sleeve further comprises a sliding portion and an adjusting portion, wherein the sliding portion and the adjusting portion are connected via an angle adjustment mechanism, wherein the sliding portion and the adjusting portion are provided with mutually communicating through holes, and the through holes of the sliding portion and the adjusting portion are mutually communicating to form an adjustable guide hole; The cross section of the through hole of the sliding portion is oval; A protrusion is provided at the bottom of the sliding portion, the sliding portion is slidably connected to the sliding groove, and the sliding portion and the sliding groove are rotatably engaged; The chute includes an upper portion, a middle portion, and a lower portion from top to bottom. The sliding portion includes a cylindrical portion and a limiting portion arranged above and below. The outer diameter of the cylindrical portion matches the width of the upper portion. The cross-section of the limiting portion is a rectangle with arc-shaped diagonals. The distance between the long sides of the rectangle matches the width of the middle portion, and the length of the short sides of the rectangle is greater than the width of the upper portion. The lower part is a channel for the nail to pass through; the width of the lower part matches the width of the upper part; The angle adjustment mechanism includes a screw, and the sliding portion and the adjustment portion are both provided with a shaft hole for passing the screw; The rotating shaft holes of the sliding portion and the adjusting portion are passed through the screws and locked; The outer wall of the sliding part where the rotating shaft hole is opened is provided with a reference line; An angle marking line is provided on the outer wall of the adjusting portion where the rotating shaft hole is provided.

2. The K-wire-assisted diaphyseal fracture reduction device according to claim 1, characterized in that: The outer wall of the outer protrusion includes two mutually parallel planes; The plane is a contact surface that is slidably connected to the sliding groove.

3. The K-wire-assisted guided diaphyseal fracture reduction device according to claim 1, characterized in that: The length direction of the slide groove of the upper splint is the left-right direction; Also included is a replacement splint set, the replacement splint set including an auxiliary upper splint and an auxiliary lower splint arranged above and below; The auxiliary upper clamping plate is provided with an auxiliary sliding groove for sliding connection with the guide sleeve, and the guiding direction of the auxiliary sliding groove forms an acute angle or a right angle with the left and right directions; The auxiliary lower splint is provided with an auxiliary strip-shaped opening corresponding to the upper and lower portions of the auxiliary chute; The auxiliary upper clamping plate and the auxiliary lower clamping plate are detachably connected to the first clamp handle and the second clamp handle.

4. The K-wire-assisted guided diaphyseal fracture surgical reduction device according to claim 1, characterized in that: The locking mechanism includes an arc-shaped connecting rod, the lower end of which is fixedly connected to the second clamp handle, and the upper end of which is provided with a threaded groove; The first clamp handle is provided with a channel for a connecting rod to pass through, and the connecting rod passes through the channel and is connected to a nut.

5. The K-wire-assisted guided diaphyseal fracture surgical reduction device according to claim 1, characterized in that: The right ends of the first clamp handle and the second clamp handle are glued with rubber leather covers.

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