A surgical auxiliary device for rabbit patellar subluxation

Abstract

The present invention relates to the technical field of orthopedic research models, specifically a rabbit patellar subluxation surgical auxiliary device, including a base and a supine platform with an adjustable angle connected above the base, a patellar subluxation mechanism is arranged above the rear end of the supine platform, a circular ring is arranged in the middle of the rear end of the supine platform, and the two sides of the circular ring are rotatably connected with a support rod, and the patellar subluxation mechanism includes an L-shaped telescopic rod, and the outer end of the vertical section of the telescopic rod is threadedly connected with a rotating handle, and the other end of the rotating handle is bonded with a Y-shaped push head. The present invention fixes the rabbit supinely on the supine platform, and ties the legs tightly to the support rod, moves the patellar subluxation device to the knee to fix it, and then rotates the rotating handle to squeeze the rabbit patella to make it subluxed, thereby achieving the purpose of patellar subluxation. The function of this device is to fix the patellar subluxation position, which is conducive to surgical suture fixing position and assisting the patellar subluxation operation.

Description

Technical Field

[0001] The invention relates to the technical field of orthopedic research models, in particular to a rabbit patellar subluxation surgery auxiliary device. Background Art

[0002] In current research, there are few models of patellar subluxation in rabbits. In 1989, Bjarne first established an approximate CMP model by changing the patellar motion trajectory of rabbits. This model artificially changed the patellar motion trajectory, resulting in uneven force on the patellar cartilage, which led to performance similar to CMP. In 1993, Laberge published a model study on canine patellar chondromalacia and established an animal model close to human CMP. In 1997, Junnosuke established a rabbit patellar subluxation model through surgery. No patellar pressure massage was performed after surgery. Only after the 120th week of modeling did pathological changes in the patellar cartilage appear. Other patella-related models are mostly models of knee cartilage injury and osteoarthritis, or models of fibrocartilage injury at the patellar tendon junction and knee joint infection. There are very few models of patellar subluxation. Establishing a patella-related disease model can be better used to study diseases related to patellar softening caused by patellar subluxation, which is relatively difficult to treat in current medicine.

[0003] This patent uses a patellar subluxation surgical device to assist in patellar subluxation surgery. After the surgery, the animal is forced to exercise and a certain force is artificially applied to the patella to promote cartilage damage. It aims to establish a repeatable and standardized modeling method for a CMP rabbit model caused by patellar subluxation, and to establish an animal model that is close to the pathological manifestations of human patellar subluxation, which is of great significance for further research on the pathogenesis and treatment of CMP. Summary of the invention

[0004] The purpose of the present invention is to provide a rabbit patellar subluxation surgical auxiliary device to solve the problems raised in the above background technology. The present invention fixes the rabbit on its back on a supine platform and ties its legs tightly to a support rod. The patellar subluxation device is moved to its knee for fixing, and then the pusher head is rotated to squeeze the rabbit's patella to make it subluxated, thereby achieving the purpose of patellar subluxation. The function of this device is to fix the position of the patellar subluxation, which is conducive to surgical suturing and fixing the position, and assisting the patellar subluxation surgery.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A rabbit patellar subluxation surgery auxiliary device comprises a base (1) and a supine platform (2) connected to the top thereof and capable of adjusting its angle; a patellar subluxation mechanism (3) is arranged above the rear end of the supine platform (2); the supine platform (2) is used to fix a rabbit; and the patellar subluxation mechanism (3) is used to subluxate the rabbit's patella.

[0007] A support plate (10) is vertically provided at the rear end of the top surface of the base (1), and the top end of the support plate (10) is rotatably connected to a connecting rod (11). The front and rear ends of the bottom of the base (1) and the supine platform (2) are both connected to a pair of lifting screws (13). A circular ring (20) is provided in the middle of the rear end of the supine platform (2). The two sides of the circular ring (20) are rotatably connected to support rods (21). The top end of the support rod (21) is rotatably connected to one end of the connecting rod (11). A guide rail (22) with a trapezoidal platform structure is bonded to the rear side of the upper half of the support rod (21). The patellar subluxation mechanism (3) comprises an L-shaped telescopic rod (30). The outer end of the vertical section of the telescopic rod (30) and the horizontal section of the telescopic rod (30) are A threaded hole (300) is provided in the direction of the segment, the internal thread of the threaded hole (300) is connected to a rotating handle (31), the other end of the rotating handle (31) is bonded with a Y-shaped push head (311), one side of the telescopic rod (30) is connected to a swing frame (32), one end of the swing frame (32) is vertically provided with a connecting sleeve (33), the inside of the connecting sleeve (33) is provided with a hole (330) for plugging with the horizontal segment of the telescopic rod (30), the other end of the swing frame (32) is fixed with a slider (34) by bolts, the top end of the slider (34) and the inner side thereof are provided with a slide groove (340), the slide groove (340) is sleeved with the guide rail (22) and can slide.

[0008] Preferably, double rings are symmetrically provided on the front and rear end bottom surfaces of the supine platform and the front and rear end top surfaces of the base, a through hole is opened at one end of the lifting screw, the through hole is connected to the double rings by a pin, a rotating frame is connected between the two lifting screws, the rotating frame is a square frame structure and a ring is welded in the middle of the upper and lower ends, and the ring is threadedly connected to the lifting screw.

[0009] Preferably, the front half of the outer side of the rotating handle is provided with threads, and the side of the rear half is provided with scale lines.

[0010] Preferably, a fixing hole is provided on the side of one end of the connecting sleeve away from the swing frame, a rotating hole is provided on the other end of the swing frame, and a positioning hole is provided on the rear side of the sliding block that penetrates into the slide groove. The interiors of the fixing hole, the rotating hole and the positioning hole are all provided with threads and are threadedly connected with bolts.

[0011] Preferably, fixing blocks are bonded on both sides of the middle of the supine platform, square notches are opened on the top sides of the fixing blocks and large straps are fastened thereto, and small straps are arranged on the upper and lower ends of the support rods and on the sides facing the supine platform.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The rabbit patellar subluxation surgical auxiliary device is a device that fixes the rabbit in a supine position on a supine table with its legs tied to a support rod. The patellar subluxation mechanism is moved to the rabbit's knee and fixed, and then the pusher head is used to squeeze the rabbit's patella by rotating the handle to achieve artificial subluxation. This device saves manpower and time costs for research, eliminates the instability and uncertainty of traditional manual surgery, is conducive to surgical suturing and fixing the position, can also improve the efficiency of the operation, and is helpful for conducting quantitative and precise experimental research. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is an overall side view of the present invention;

[0016] Figure 3 This is a perspective view of the overall rear side of the present invention;

[0017] Figure 4 It is a schematic diagram of the assembly structure of the base and supine platform of the present invention;

[0018] Figure 5 It is a schematic diagram of the connection structure between the lifting screw and the rotating frame of the present invention;

[0019] Figure 6 It is an exploded view of the patellar subluxation mechanism of the present invention.

[0020] The meaning of each number in the figure is:

[0021] 1. Base; 10. Support plate; 11. Connecting rod; 12. Double ring; 13. Lifting screw; 130. Through hole; 14. Rotating frame; 140. Ring; 2. Supine table; 20. Ring sleeve; 21. Support rod; 22. Guide rail; 3. Patellar subluxation mechanism; 30. Telescopic rod; 300. Threaded hole; 31. Rotating handle; 310. Scale line; 311. Push head; 32. Swing frame; 320. Rotating hole; 33. Connecting sleeve; 330. Hole; 331. Fixing hole; 34. Sliding block; 340. Sliding groove; 341. Positioning hole; 4. Large strap; 40. Fixing block; 5. Small strap. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "center line", "longitudinal", "lateral", "length", "width", "thickness", "depth", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0024] See also Figure 1-Figure 6 ,

[0025] Example 1

[0026] The present invention provides a technical solution:

[0027] A surgical auxiliary device for treating patellar subluxation in rabbits comprises a base 1 and a supine platform 2 with an adjustable angle connected thereto, wherein a patellar subluxation mechanism 3 is arranged above the rear end of the supine platform 2. A support plate 10 is vertically arranged at the rear end of the top surface of the base 1, and a connecting rod 11 is rotatably connected to the top of the support plate 10. Circular holes are provided at the top of the support plate 10 and at both ends of the connecting rod 11, and the connection is rotatably connected by inserting a pin. A pair of lifting screws 13 are connected to the front and rear ends of the bottom of the base 1 and the supine platform 2. A circular ring 20 is arranged at the middle of the rear end of the supine platform 2, and a support rod 21 is rotatably connected to both sides of the circular ring 20, and the top of the support rod 21 is rotatably connected to one end of the connecting rod 11, and circular holes are provided at the upper and lower ends of the support rod 21, and the rotation connection is rotatably connected to each other by inserting a pin. The supine platform 2 is suspended on the base 1 under the support of two sets of lifting screws 13 and the suspension of the support plate 10. A guide rail 22 of a trapezoidal structure is bonded to the rear side of the upper half of the support rod 21, and its wide dimension faces the outside of the support rod 21. The patellar subluxation mechanism 3 includes an L-shaped telescopic rod 30, a threaded hole 300 is provided at the outer end of the vertical section of the telescopic rod 30 and along the horizontal section thereof, a rotating handle 31 is connected to the internal thread of the threaded hole 300, and a Y-shaped push head 311 is bonded to the other end of the rotating handle 31, which is used to press the patella of the rabbit's knee. A swing frame 32 is connected to one side of the telescopic rod 30, and a connecting sleeve 33 is vertically provided at one end of the swing frame 32. A hole 330 is provided inside the connecting sleeve 33 for plugging with the horizontal section of the telescopic rod 30, which is used to roughly adjust the distance from the push head 311 to the rabbit's leg. The distance from the push head 311 to the rabbit's leg can be fine-tuned by rotating the rotating handle 31. A slider 34 is fixed to the other end of the swing frame 32 by bolts. A slide groove 340 is provided at the top of the slider 34 and through its inner side surface. The slide groove 340 is sleeved and slidable with the guide rail 22. Since the port width of the slide groove 340 is smaller than the internal width, a limiting structure is formed with the guide rail 22 to prevent the slider 34 from slipping off.

[0028] In this embodiment, the base 1 and the support plate 10 are both made of PP material to form an integral structure, and the supine platform 2 and the circular ring sleeve 20 are both made of PP material to form an integral structure, which is light in weight, has good toughness and strong strength, making it durable.

[0029] Furthermore, the front and rear bottom surfaces of the supine platform 2 and the front and rear top surfaces of the base 1 are symmetrically provided with double circular rings 12, and one end of the lifting screw 13 is provided with a through hole 130, and the through hole 130 is connected to the double circular ring 12 by a pin, so that the supine platform 2 can be deflected at will to adjust the angle. A rotating frame 14 is connected between the two lifting screws 13, and the rotating frame 14 is a square frame structure and a collar 140 is welded in the middle of the upper and lower ends. The inner side of the collar 140 is provided with a thread, and the collar 140 is threadedly connected with the lifting screw 13. The threads of the two lifting screws 13 are positive and negative threads. By rotating the rotating frame 14 forward and backward, the two lifting screws 13 can be moved closer or farther away, so as to adjust the tilt angle of the supine platform 2 as needed.

[0030] Specifically, the front half of the outer side of the rotating handle 31 is provided with a thread, and the side of the rear half thereof is provided with a scale line 310 for observing the screw-in length of the rotating handle 31 so as to accurately squeeze the rabbit patella to cause it to deviate and achieve forced intervention of artificial subluxation.

[0031] Specifically, a fixing hole 331 is provided on the side of one end of the connecting sleeve 33 away from the swing frame 32, a rotating hole 320 is provided on the other end of the swing frame 32, and a positioning hole 341 is provided on the rear side of the slider 34, and the interiors of the fixing hole 331, the rotating hole 320 and the positioning hole 341 are all provided with threads and are threadedly connected with bolts, and a concave hole coaxial with the positioning hole 341 is provided on the side of the slider 34, and a thread is provided in the concave hole to facilitate tightening of the bolt, and by tightening each bolt, the telescopic rod 30, the swing frame 32 and the slider 34 are stabilized respectively, so that the push head 311 is aligned with the rabbit patella, and semi-luxation is achieved more accurately.

[0032] In addition, fixing blocks 40 are bonded on both sides of the middle of the supine platform 2. Square grooves are opened on the top side of the fixing block 40 and are fastened with a large strap 4. The large strap 4 is fastened to stabilize the upper body of the rabbit. Small straps 5 are provided on the upper and lower ends of the support rod 21 and on the sides facing the supine platform 2. The two ends of the small strap 5 are fastened to the fixing blocks 40 bonded on both sides of the support rod 21, so as to tie the rabbit's thighs and calves tightly to prevent the rabbit from moving around.

[0033] When the rabbit patellar subluxation surgical auxiliary device of the present invention is used, the experimental rabbit after general anesthesia is placed supinely on the supine table 2, and its legs are leaned against the support rod 21, and then all the large straps 4 and small straps 5 are tightened to stabilize the rabbit, and the slider 34 is slid on the guide rail 22 to be located at the rabbit's knee, and the bolt in the positioning hole 341 is tightened to stabilize the slider 34, and then the swing frame 32 is rotated to make the connecting sleeve 33 located in front of the rabbit's knee, and the bolt in the rotating hole 320 is tightened to stabilize it. After disinfecting the epidermis, the skin and tissue above the patella of the rabbit's knee are cut with a scalpel to expose the patella, and then the telescopic rod 30 is horizontally moved to make the push head 311 close to the rabbit's patella, and the bolt in the fixing hole 331 is tightened to stabilize it, and finally the rotating handle 31 is slowly rotated to make the push head 311 press on the patella of the rabbit's knee to promote the subluxation injury of the cartilage.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A surgical auxiliary device for rabbit patellar subluxation, characterized in that: It comprises a base (1) and a supine platform (2) connected to the top thereof and capable of adjusting its angle; a patellar subluxation mechanism (3) is arranged above the rear end of the supine platform (2); the supine platform (2) is used to fix a rabbit; and the patellar subluxation mechanism (3) is used to subluxate the patella of the rabbit; A support plate (10) is vertically provided at the rear end of the top surface of the base (1), and the top end of the support plate (10) is rotatably connected to a connecting rod (11). The front and rear ends of the bottom of the base (1) and the supine platform (2) are both connected to a pair of lifting screws (13). A circular ring (20) is provided in the middle of the rear end of the supine platform (2). Both sides of the circular ring (20) are rotatably connected to support rods (21). The top end of the support rod (21) is rotatably connected to one end of the connecting rod (11), and a guide rail (22) with a trapezoidal platform structure is bonded to the rear side of the upper half of the support rod (21); The patellar subluxation mechanism (3) comprises an L-shaped telescopic rod (30), a threaded hole (300) is provided at the outer end of the vertical section of the telescopic rod (30) and along the horizontal section thereof, a rotating handle (31) is connected to the inner thread of the threaded hole (300), a Y-shaped push head (311) is bonded to the other end of the rotating handle (31), a swing frame (32) is connected to one side of the telescopic rod (30), a connecting sleeve (33) is vertically provided at one end of the swing frame (32), a hole (330) is provided inside the connecting sleeve (33) for plugging with the horizontal section of the telescopic rod (30), a slider (34) is fixed to the other end of the swing frame (32) by bolts, a slide groove (340) is provided at the top end of the slider (34) and through the inner side thereof, and the slide groove (340) is sleeved with the guide rail (22) and can slide; The front and rear end bottom surfaces of the supine platform (2) and the front and rear end top surfaces of the base (1) are symmetrically provided with double circular rings (12); one end of the lifting screw (13) is provided with a through hole (130); the through hole (130) and the double circular rings (12) are connected by a pin; a rotating frame (14) is connected between the two lifting screws (13); the rotating frame (14) is in a square frame structure and has a sleeve (140) welded in the middle of the upper and lower ends; the sleeve (140) is threadedly connected to the lifting screw (13).

2. The rabbit patellar subluxation surgical auxiliary device according to claim 1, characterized in that: The front half of the outer side of the rotating handle (31) is provided with a thread, and the side surface of the rear half is provided with a scale mark (310).

3. The rabbit patellar subluxation surgical auxiliary device according to claim 2, characterized in that: A fixing hole (331) is formed on the side surface of one end of the connecting sleeve (33) away from the swing frame (32), a rotating hole (320) is formed on the other end of the swing frame (32), and a positioning hole (341) penetrating to the slide groove (340) is formed on the rear side surface of the sliding block (34), and threads are formed inside the fixing hole (331), the rotating hole (320) and the positioning hole (341) and are threadedly connected to bolts.

4. The rabbit patellar subluxation surgical auxiliary device according to claim 3, characterized in that: Fixed blocks (40) are bonded to both sides of the middle of the supine platform (2), and a square notch is provided on the top side of the fixed block (40) and a large strap (4) is fastened thereto. Small straps (5) are provided at the upper and lower ends of the support rod (21) and on the side facing the supine platform (2).

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