Auxiliary device for patella fracture titanium cable internal fixation

Abstract

The utility model discloses an auxiliary device for patella fracture titanium cable internal fixation, which comprises a first handle and a second handle, the first handle and the second handle are arranged in an X-shaped crossing manner, and the crossing part is rotatably and fixedly connected through a main body connecting shaft; an elastic locking device is arranged between the tail end of the first handle and the tail end of the second handle, and the elastic locking device can be locked after the first handle and the second handle move to determined positions; a fixed sleeve is arranged at the head end of the first handle, a fixed annular support is arranged at the head end of the second handle, and the fixed sleeve and the fixed annular support are coaxially arranged; a movable inner sleeve is arranged in the fixed sleeve, the movable inner sleeve is a hollow cylindrical sleeve in the central axis direction, and a sleeve handle is arranged at the end, opposite to the fixed annular support, of the movable inner sleeve. The device is small in size and small in operation space, meets the minimally invasive requirement, and can smoothly implant the patella titanium cable through a small incision.

Description

Technical Field

[0001] The utility model belongs to medical auxiliary equipment, in particular to an auxiliary device for titanium cable internal fixation of patellar fracture. Background Art

[0002] At present, the commonly used surgical procedure for patellar fractures is open reduction and titanium cable internal fixation. As the concept of clinical minimally invasive surgery has gained popularity, arthroscopy-assisted patellar fracture reduction and fixation has been increasingly used in clinical treatment for relatively simple patellar fractures. However, there are currently no matching temporary fracture fixation and titanium cable insertion devices, resulting in large local incisions and greater trauma, which limits the minimally invasive advantages of arthroscopy-assisted minimally invasive technology. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides an auxiliary device for titanium cable internal fixation of patellar fracture, which has a small size and small operation space, meets the requirements of minimally invasive surgery, and can smoothly implant the patellar titanium cable through a small incision. It can be used for arthroscopically assisted patellar fracture reduction and titanium cable internal fixation.

[0004] The technical solution of the utility model is: an auxiliary device for titanium cable internal fixation of patellar fracture, comprising a first handle and a second handle, wherein the first handle and the second handle are arranged in an X-shape and are rotatably fixedly connected at the intersection through a main body connecting shaft;

[0005] An elastic locking device is provided between the tail end of the first handle and the tail end of the second handle, and the elastic locking device can be locked after the first handle and the second handle are moved to a certain position;

[0006] The first handle head end is provided with a fixed sleeve, the second handle head end is provided with a fixed annular bracket, and the fixed sleeve and the fixed annular bracket are coaxially arranged;

[0007] A movable inner sleeve is arranged inside the fixed sleeve. The movable inner sleeve is a hollow cylindrical sleeve along the central axis direction. A sleeve handle is arranged at one end of the movable inner sleeve facing away from the fixed annular bracket.

[0008] Furthermore, the elastic locking device comprises an elastic reset shaft and a connecting rod connected to the elastic reset shaft and capable of rotating and resetting;

[0009] The elastic reset shaft is fixedly arranged at the tail end of the first handle;

[0010] The first end of the connecting rod is connected to the elastic reset shaft, and a plurality of right-angled serrated claws are evenly arranged on the upper surface of the connecting rod along the axial direction. The second end of the connecting rod passes through the slot processed at the tail end of the second handle, and the right-angled serrated claws on the connecting rod can be matched and connected with the hook in the slot and fixed.

[0011] When the distance between the tail end of the first handle and the tail end of the second handle needs to be shortened, the first handle and the second handle are held in between and force is applied toward each other. The connecting rod with the right-angled serrated claw moves naturally in the slot and stops at the desired position. The right-angled serrated claw and the hook in the slot are naturally matched and connected and fixed.

[0012] When the distance between the tail end of the first handle and the tail end of the second handle needs to be increased, the connecting rod is pressed down so that the right-angled serrated claw on the connecting rod is disengaged from the hook in the slot, and the distance between the tail end of the first handle and the tail end of the second handle can be adjusted at will.

[0013] Furthermore, the shape of the handle between the head end and the intersection of the first handle is an arc-shaped structure with both ends bent toward the second handle;

[0014] The shape of the handle between the head end and the intersection of the second handle is an arc-shaped structure with both ends bent toward the first handle.

[0015] Furthermore, a serrated anti-slip structure is provided on the end surface of the fixed annular bracket facing the movable inner sleeve.

[0016] Furthermore, a serrated anti-slip structure is provided on the end surface of the movable inner sleeve facing the fixed annular bracket.

[0017] Furthermore, anti-slip patterns are carved on the outer periphery of the gripping parts at the tail ends of the first handle and the second handle.

[0018] Furthermore, the inner diameter of the movable inner sleeve allows the Kirschner wire and the titanium cable to pass through.

[0019] The beneficial effects of the utility model are as follows: the handle composed of the first handle and the second handle can be used for handheld instruments, which is convenient for operation. The fixed annular bracket can be used to support the upper edge of the patella through a small incision on the upper part of the patella, and the junction of the fixed annular bracket and the patella is used as a fixed point. The movable inner sleeve is adjusted by holding the sleeve handle, and the head end of the sleeve is used to support the lower pole of the patella through the movable sleeve. The direction of the sleeve is determined by perspective to be on the central axis of the lateral view of the patella or close to the central axis of the lateral view of the patella. The movable sleeve is appropriately compressed, and a patellar bone tunnel is prepared through the sleeve by an electric drill, and the drill bit is withdrawn and the titanium cable is passed through. The design of the utility model is applied to the implantation of titanium cables in joint-assisted patellar fracture reduction and titanium cable internal fixation. The operating space is small, which meets the requirements of minimally invasive surgery, and the patellar titanium cable can be implanted smoothly through a small incision. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of an auxiliary device for titanium cable internal fixation of patellar fracture.

[0021] In the figure: 1 is a first handle, 2 is a second handle, 3 is a main body connecting shaft, 4 is an elastic locking device, 5 is a fixed sleeve, 6 is a movable inner sleeve, 7 is a sleeve handle, 41 is an elastic reset shaft, and 42 is a connecting rod. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings.

[0023] like Figure 1 As shown, an auxiliary device for titanium cable internal fixation of patellar fracture includes a first handle 1 and a second handle 2, wherein the first handle 1 and the second handle 2 are cross-arranged in an X shape, and the intersection is rotatably fixedly connected through a main body connecting shaft 3.

[0024] An elastic locking device 4 is provided between the tail end of the first handle 1 and the tail end of the second handle 2, and the elastic locking device 4 can be locked after the first handle 1 and the second handle 2 are moved to a certain position. Specifically, the elastic locking device 4 includes an elastic reset shaft 41 and a connecting rod 42 that can be rotated and reset and is connected to the elastic reset shaft 41. The elastic reset shaft 41 is fixedly arranged at the tail end of the first handle 1. The first end of the connecting rod 42 is connected to the elastic reset shaft 41, and a plurality of right-angled serrated claws are evenly arranged on the upper surface of the connecting rod 42 along the axial direction. The second end of the connecting rod 42 passes through the slot processed at the tail end of the second handle 2, and the right-angled serrated claws on the connecting rod 42 can be matched and connected with the hook in the slot to be fixed. When it is necessary to shorten the distance between the tail end of the first handle and the tail end of the second handle, the first handle and the second handle are held in the middle, and force is applied toward each other, and the connecting rod with the right-angled serrated claw moves naturally in the slot, stops after reaching the required position, and the right-angled serrated claws are naturally matched and connected with the hook in the slot to be fixed. When the distance between the tail end of the first handle and the tail end of the second handle needs to be increased, the connecting rod is pressed down so that the right-angled serrated claw on the connecting rod is disengaged from the hook in the slot, and the distance between the tail end of the first handle and the tail end of the second handle can be adjusted at will.

[0025] The handle shape between the head end and the intersection of the first handle 1 is an arc-shaped structure with both ends bent toward the second handle 2. The handle shape between the head end and the intersection of the second handle 2 is an arc-shaped structure with both ends bent toward the first handle 1.

[0026] The head end of the first handle 1 is provided with a fixed sleeve 5, and the head end of the second handle 2 is provided with a fixed annular bracket 8, and the fixed sleeve 5 is coaxially arranged with the fixed annular bracket 8. A movable inner sleeve 6 is arranged inside the fixed sleeve 5, and the movable inner sleeve 6 is a hollow cylindrical sleeve along the central axis direction, and a sleeve handle 7 is arranged at one end of the movable inner sleeve 6 facing away from the fixed annular bracket 8. The inner diameters of the fixed annular bracket and the movable inner sleeve allow the Kirschner wire and titanium cable to pass through.

[0027] For anti-skid design, a serrated anti-skid structure is provided on the end surface of the fixed annular bracket 8 facing the movable inner sleeve 6. A serrated anti-skid structure is provided on the end surface of the movable inner sleeve 6 facing the fixed annular bracket 8. Anti-skid patterns are engraved on the outer periphery of the hand-holding part at the end of the first handle 1 and the second handle 2.

[0028] In this embodiment, the length of the connecting rod is 18.00 cm. The outer diameter of the fixed annular bracket 8 is 2.50 mm, and the inner diameter is 2.40 mm. The length of the fixed sleeve 5 is 3.00 cm, the outer diameter is 2.50 mm, and the inner diameter is 2.40 mm. The length of the movable inner sleeve is 5.00 cm, the outer diameter is 2.30 mm, and the inner diameter is 2.20 mm.

[0029] The handle composed of the first handle and the second handle can be used for handheld instruments, which is convenient for operation. The fixed annular bracket can be pressed against the upper edge of the patella through a small incision on the upper part of the patella, and the junction of the fixed annular bracket and the patella is used as the fixed point. The movable inner sleeve is adjusted by holding the sleeve handle, and the head end of the sleeve is pressed against the lower pole of the patella through the movable sleeve. The direction of the sleeve is determined by perspective to be on or close to the central axis of the lateral view of the patella. The movable sleeve is appropriately compressed, and a patellar bone tunnel is prepared through the sleeve by an electric drill, and the drill bit is withdrawn and the titanium cable is passed through. The design of the utility model is applied to the implantation of titanium cables in joint-assisted patellar fracture reduction and titanium cable internal fixation. The operating space is small, which meets the requirements of minimally invasive surgery, and the patellar titanium cable can be implanted smoothly through a small incision.

[0030] The above is only a preferred embodiment 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 principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An auxiliary device for internal fixation of patellar fracture with titanium cable, characterized in that: It comprises a first handle (1) and a second handle (2), wherein the first handle (1) and the second handle (2) are arranged crosswise in an X shape, and the intersection is rotatably fixedly connected via a main body connecting shaft (3); An elastic locking device (4) is provided between the tail end of the first handle (1) and the tail end of the second handle (2), and the elastic locking device (4) can be locked after the first handle (1) and the second handle (2) are moved to a certain position; The head end of the first handle (1) is provided with a fixed sleeve (5), the head end of the second handle (2) is provided with a fixed annular bracket (8), and the fixed sleeve (5) and the fixed annular bracket (8) are coaxially arranged; A movable inner sleeve (6) is arranged inside the fixed sleeve (5). The movable inner sleeve (6) is a hollow cylindrical sleeve along the central axis direction. A sleeve handle (7) is arranged at one end of the movable inner sleeve (6) facing away from the fixed annular bracket (8).

2. The auxiliary device for internal fixation of patellar fracture with titanium cable according to claim 1, characterized in that: The elastic locking device (4) comprises an elastic reset shaft (41) and a connecting rod (42) connected to the elastic reset shaft (41) and capable of rotational reset; The elastic reset shaft (41) is fixedly arranged at the rear end of the first handle (1); The first end of the connecting rod (42) is connected to the elastic reset shaft (41), and a plurality of right-angled serrated claws are evenly arranged on the upper surface of the connecting rod (42) along the axial direction. The second end of the connecting rod (42) passes through a slot processed at the rear end of the second handle (2), and the right-angled serrated claws on the connecting rod (42) can be matched and connected with the hooks in the slot to be fixed.

3. The auxiliary device for internal fixation of patellar fracture with titanium cable according to claim 1, characterized in that: The shape of the handle between the head end and the intersection of the first handle (1) is an arc-shaped structure with both ends bent toward the second handle (2); The shape of the handle between the head end and the intersection of the second handle (2) is an arc-shaped structure with both ends bent toward the first handle (1).

4. The auxiliary device for internal fixation of patellar fracture with titanium cable according to claim 1, characterized in that: The end surface of the fixed annular bracket (8) facing the movable inner sleeve (6) is provided with a serrated anti-slip structure.

5. The auxiliary device for internal fixation of patellar fracture with titanium cable according to claim 1, characterized in that: The end surface of the movable inner sleeve (6) facing the fixed annular bracket (8) is provided with a serrated anti-slip structure.

6. The auxiliary device for internal fixation of patellar fracture with titanium cable according to claim 1, characterized in that: The outer peripheries of the holding positions at the tails of the first handle (1) and the second handle (2) are engraved with anti-slip patterns.

7. The auxiliary device for internal fixation of patellar fracture with titanium cable according to claim 1, characterized in that: The inner diameter of the movable inner sleeve (6) allows the Kirschner wire and the titanium cable to pass through.

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