Fracture minimally invasive internal fixation guiding device

Abstract

The utility model relates to the technical field of medical instruments, in particular to a fracture minimally invasive internal fixation guiding device which comprises a fixing plate, a positioning plate, a clamping mechanism and a sleeve, a plurality of sets of fixing holes are formed in the fixing plate in a penetrating mode, a plurality of sets of positioning holes are formed in the positioning plate in a penetrating mode, and the positioning holes correspond to the fixing holes. The clamping mechanism comprises a clamping plate, a plurality of sets of clamping bases are arranged on the clamping plate in a sliding mode, and a needle hole is formed in the sleeve in a penetrating mode. The positioning plate is used for guiding, a smaller incision can be realized, so that the postoperative pain and trauma are reduced, the minimally invasive property of the surgery is improved, the concept of'minimally invasive, painless and rapid rehabilitation 'pursued by the modern surgery is met, and the minimally invasive property is stronger.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments and particularly to a minimally invasive internal fixation guide device for fractures. Background Art

[0002] Traditional medicine's treatment methods for fractures are nothing more than splint or plaster external fixation and surgical incision internal fixation. Plaster external fixation is suitable for relatively stable fractures and generally does not require other instruments. Splint external fixation and surgical internal fixation are suitable for unstable fractures. Comminuted fractures, near-articular fractures, and extremely unstable fractures must be treated with surgery.

[0003] Currently, during the operation, a fixation plate is implanted into the patient's body through minimally invasive surgery. When the screws are implanted for fixation, the skin above the plate hole needs to be cut for positioning. However, the doctor can only roughly estimate the position of the screw hole and use the mippo technique for minimally invasive incision. Sometimes there will be errors in estimating the incision, so the incision has to be extended and more soft tissue stripping will be done. Utility Model Content

[0004] The utility model provides a minimally invasive internal fixation guiding device for fractures to solve the problems of the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: A minimally invasive internal fixation guide device for fractures, comprising:

[0006] A fixing plate, wherein the fixing plate is provided with a plurality of fixing holes;

[0007] A positioning plate, wherein a plurality of positioning holes are provided through the positioning plate, and the positioning holes and the fixing holes are provided correspondingly;

[0008] A clamping mechanism, the clamping mechanism comprising a clamping plate, on which a plurality of groups of clamping seats are slidably arranged;

[0009] The sleeve comprises a positioning sleeve and a locking sleeve, wherein a pinhole for placing a Kirschner wire is provided through the positioning sleeve, and a locking hole for placing a screw is provided through the locking sleeve.

[0010] A further improvement is that the clamping plate is provided with a clamping groove, a positioning groove and a locking groove, the locking groove passes through the clamping groove and the positioning groove in sequence, a clamping seat is slidably arranged in the clamping groove, a locking assembly is slidably arranged in the positioning groove, the locking assembly includes a locking slider and a locking bolt, the locking slider is slidably arranged in the positioning groove, the locking bolt is threadedly connected to the locking groove and the locking slider and its front end is against the clamping seat.

[0011] As a further improvement, a matching hole is provided at a side end of the clamping seat, and the front end of the locking bolt is inserted into the matching hole.

[0012] As a further improvement, a chamfer is provided on the upper side of the fixing hole, a conical positioning surface is provided on the lower end of the sleeve, and the conical positioning surface and the chamfer are arranged in close contact with each other.

[0013] As a further improvement, the clamping mechanism is provided with two groups, one of which is provided between the fixing plate and the positioning plate, and the other is provided on the upper end of the positioning plate.

[0014] A further improvement is that the pinhole diameter is a, and a is 2 mm.

[0015] A further improvement is that the pinhole diameter is a, and a is 2.5 mm.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The utility model can achieve a smaller incision through the guidance of the positioning plate, thereby reducing postoperative pain and trauma, improving the minimally invasive nature of the surgery, and conforming to the concept of "minimally invasive, painless, and rapid recovery" pursued by modern surgery, with a stronger minimally invasive nature;

[0018] 2. The design of the guide of the utility model helps to improve the accuracy of the operation, making the process of screw implantation more accurate and controllable, helping to avoid errors in the operation and improve the success rate of the operation;

[0019] 3. The utility model can reduce subperiosteal and extraperiosteal stripping, help protect the patient's extraosseous circulation, and reduce the incidence of bone nonunion;

[0020] 4. Due to minimally invasive incisions and more precise implantation, the present invention may make surgery more efficient, shorten the operation time, reduce the surgical burden on patients, and shorten the operation time;

[0021] 5. The utility model has less trauma, so the patient's recovery after surgery may be faster, the risk of postoperative complications is reduced, the patient's quality of life is improved, and the patient's recovery after surgery is faster;

[0022] 6. The utility model can improve the reproducibility of surgery, making it easier for different doctors to master similar technical levels when using similar equipment, and has technical reproducibility;

[0023] 7. The utility model can implant a Kirschner wire through a sleeve to maintain temporary fixation after fracture reduction, thereby increasing the stability of reduction when inserting screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 An exploded view of the clamping seat and locking assembly of the utility model;

[0026] Figure 3 It is a cross-sectional view of the utility model;

[0027] Figure 4 For this utility model Figure 3 A magnified view of the part A in the middle;

[0028] Figure 5 It is a partial cross-sectional view of the utility model.

[0029] In the figure, 1, fixing plate; 11, fixing hole; 111, chamfer; 2, positioning plate; 21, positioning hole; 3, clamping mechanism; 31, clamping plate; 311, clamping slot; 312, positioning slot; 313, locking slot; 32, clamping seat; 321, matching hole; 33, locking assembly; 331, locking slider; 332, locking bolt; 4, sleeve; 41, positioning sleeve; 411, pinhole; 42, locking sleeve; 421, locking hole. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Below is a combination of the embodiments and the attached Figures 1 to 5 , the technical solution of the utility model is further elaborated.

[0033] Example 1

[0034] A minimally invasive internal fixation guide device for fractures, comprising:

[0035] A fixing plate 1, wherein the fixing plate 1 is provided with a plurality of fixing holes 11;

[0036] A positioning plate 2, wherein a plurality of positioning holes 21 are provided through the positioning plate 2, and the positioning holes 21 and the fixing holes 11 are provided correspondingly;

[0037] A clamping mechanism 3, the clamping mechanism 3 comprises a clamping plate 31, on which a plurality of clamping seats 32 are slidably arranged;

[0038] The sleeve 4 comprises a positioning sleeve 41 and a locking sleeve 42. The positioning sleeve 41 is provided with a pinhole 411 for placing a Kirschner wire, and the locking sleeve 42 is provided with a locking hole 421 for placing a screw.

[0039] like Figures 1 to 5 As shown, in actual use of the utility model, firstly, the fixing plate 1 is implanted into the patient's body through minimally invasive surgery, and the lower end of the positioning sleeve 41 is inserted into the fixing plate 1 in the exposed minimally wound wound, and the Kirschner wire is driven into the patient's bone through the pinhole 411 by an electric drill for preliminary fixation, and then the clamping mechanism 3 is sleeved on the already fixed positioning sleeve 41 through the clamping seat 32, and a positioning plate 2 with the same hole position as the fixing plate 1 is sleeved on the top, and then another set of positioning sleeves 41 is inserted into the positioning hole 21 on the other side of the positioning plate 2 through the positioning plate 2. At this time, the position indicated by the lower end of the positioning sleeve 41 is the position corresponding to the fixing hole 11 on the fixing plate 1 in the human body, and a wound is cut on the corresponding skin surface through minimally invasive surgery, and the lower end of the positioning sleeve 41 is inserted into the fixing hole 11 in the skin, and the clamping seat 32 is used to fix the fixing plate 1. After the positioning sleeve 41 is clamped, the Kirschner wire is driven into the patient's bone through the pinhole 411 through an electric drill to ensure that the positioning sleeve 41 is in a relatively stable state after the Kirschner wire is inserted. The holes on both sides of the fixing plate 1 are first fixed through the positioning plate 2, and the Kirschner wires are implanted on both sides to connect with the bone, and the positioning sleeve 41 is clamped and fixed in combination with the clamping mechanism 3 to ensure the stability of the entire guide system. After the fixation is completed, the locking sleeve 42 is inserted into the remaining positioning hole 21 of the positioning plate 2 and fixed through the clamping mechanism 3. After drilling a hole in the bone with an electric drill guided by the locking sleeve 42, the screw is implanted into the patient's body. This is repeated until all the screws are implanted into the patient's bone from the pinhole of the fixing plate 1. The initially implanted Kirschner wire and the positioning sleeve 41 are taken out and replaced with the locking sleeve 42 to implant the screw to complete the entire fixation.

[0040] The sleeve 4 is guided by the positioning plate 2 to avoid errors in the estimation of the incision during the operation, which would make it necessary to extend the incision and cause soft tissue peeling.

[0041] As a further preferred embodiment, the clamping plate 31 is provided with a clamping groove 311, a positioning groove 312 and a locking groove 313, the locking groove 313 sequentially passes through the clamping groove 311 and the positioning groove 312, a clamping seat 32 is slidably arranged in the clamping groove 311, a locking assembly 33 is slidably arranged in the positioning groove 312, the locking assembly 33 includes a locking slider 331 and a locking bolt 332, the locking slider 331 is slidably arranged in the positioning groove 312, the locking bolt 332 is threadedly connected to the locking slider 331 through the locking groove 313 and the front end of which is against the clamping seat 32.

[0042] Specifically, when a new sleeve 4 needs to be implanted, a corresponding set of clamping seats 32 is moved to both sides of the hole position. After the sleeve 4 is implanted, the clamping seats 32 are moved to limit the two sides of the sleeve 4, and the locking bolt 332 is rotated so that the front end of the locking bolt 332 and the locking slider 331 are tightly pressed against each other, and the locking slider 331 is fixed by applying lateral pressure through the locking bolt 332.

[0043] As a further preferred embodiment, a mating hole 321 is provided at the side end of the clamping seat 32, and the front end of the locking bolt 332 is inserted into the mating hole 321, so that the locking assembly 33 can move synchronously when the clamping seat 32 is moved, and there is no need to realign after the movement, thereby improving work efficiency.

[0044] As a further preferred embodiment, a chamfer 111 is provided on the upper side of the fixing hole 11, and a conical positioning surface is provided at the lower end of the sleeve 4. The conical positioning surface and the chamfer 111 are arranged in close contact with each other. Through the coordinated arrangement of the chamfer 111 and the conical positioning surface, the fixing plate 1 can play a good positioning role on the sleeve 4. At the same time, the combination of the two can make the sleeve 4 compatible with different fixing plates 1.

[0045] As a further preferred embodiment, the clamping mechanism 3 is provided with two groups, one of which is arranged between the fixing plate 1 and the positioning plate 2, and the other is arranged at the upper end of the positioning plate 2. By providing the upper and lower groups of clamping mechanisms 3, the stability of the equipment is improved. When medical staff fix the Kirschner wire, the sleeve 4 is offset due to external force, thereby causing secondary injury to the patient.

[0046] As a further preferred embodiment, the diameter of the needle hole 411 is a1, and a1 is 2 mm, which is compatible with most Kirschner wires on the market.

[0047] As a further preferred embodiment, the diameter of the needle hole 411 is a2, and a2 is 2.5 mm, which is compatible with most Kirschner wires on the market.

[0048] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A minimally invasive internal fixation guide device for fractures, characterized in that: include: A fixing plate (1), wherein the fixing plate (1) is provided with a plurality of groups of fixing holes (11); A positioning plate (2), wherein a plurality of groups of positioning holes (21) are provided through the positioning plate (2), and the positioning holes (21) and the fixing holes (11) are provided correspondingly; A clamping mechanism (3), the clamping mechanism (3) comprising a clamping plate (31), on which a plurality of groups of clamping seats (32) are slidably arranged; A sleeve (4), the sleeve (4) comprising a positioning sleeve (41) and a locking sleeve (42), the positioning sleeve (41) having a pinhole (411) for placing a Kirschner wire through the interior thereof, and the locking sleeve (42) having a locking hole (421) for placing a screw through the interior thereof.

2. A minimally invasive internal fixation guide device for fractures according to claim 1, characterized in that: The clamping plate (31) is provided with a clamping slot (311), a positioning slot (312) and a locking slot (313); the locking slot (313) passes through the clamping slot (311) and the positioning slot (312) in sequence; a clamping seat (32) is slidably arranged in the clamping slot (311); a locking assembly (33) is slidably arranged in the positioning slot (312); the locking assembly (33) comprises a locking slider (331) and a locking bolt (332); the locking slider (331) is slidably arranged in the positioning slot (312); the locking bolt (332) is threadedly connected to the locking slider (331) through the locking slot (313) and the front end of which abuts against the clamping seat (32).

3. A minimally invasive internal fixation guide device for fractures according to claim 2, characterized in that: A matching hole (321) is provided at the side end of the clamping seat (32), and the front end of the locking bolt (332) is inserted into the matching hole (321).

4. The minimally invasive internal fixation guide device for fractures according to claim 1, characterized in that: The upper side of the fixing hole (11) is provided with a chamfer (111), and the lower end of the sleeve (4) is provided with a conical positioning surface, and the conical positioning surface and the chamfer (111) are arranged in close contact.

5. The minimally invasive internal fixation guide device for fractures according to claim 1, characterized in that: The clamping mechanism (3) is provided with two groups, one of which is provided between the fixing plate (1) and the positioning plate (2), and the other is provided at the upper end of the positioning plate (2).

6. The minimally invasive internal fixation guide device for fractures according to claim 1, characterized in that: The pinhole (411) has a diameter a1, and a1 is 2 mm.

7. The minimally invasive internal fixation guide device for fractures according to claim 1, characterized in that: The diameter of the pinhole (411) is a2, and a2 is 2.5 mm.

Images