A device for minimally invasive repair of knee cartilage

Abstract

The application discloses a device for minimally invasive repair of knee cartilage, which comprises a protective pad, a stabilizing assembly arranged on the protective pad, a pair of rotating shafts arranged on one side of the protective pad through fixing columns, sleeves rotatably arranged on the outer sides of the two rotating shafts, a rotating frame connected between the two sleeves, a connecting seat arranged at the two ends of the rotating frame, a clamping wheel rotatably connected to the connecting seat, a traction rope clamped on the outer side of the clamping wheel, a winding device arranged on the rear side of the protective pad, the winding device connected with one ends of the two traction ropes respectively, and the free ends of the two traction ropes connected through an inflatable ring.

Description

Technical Field

[0001] This invention relates to the field of cartilage repair technology, and more specifically, to a device for minimally invasive repair of knee cartilage. Background Technology

[0002] Minimally invasive knee cartilage repair aims to promote cartilage regeneration or replacement through minimally invasive techniques, relieve pain, and restore joint function. Commonly used repair methods in clinical practice include: arthroscopic cartilage debridement, microfracture surgery, autologous chondrocyte transplantation, matrix-induced autologous chondrocyte transplantation, and stem cell / biological therapy. Among them, arthroscopic cartilage debridement refers to removing loose or worn cartilage fragments through arthroscopy, trimming irregular edges, and reducing joint friction and inflammation.

[0003] However, existing minimally invasive knee cartilage repair devices have difficulty fixing less damaged cartilage when removing loose or worn cartilage fragments. This can cause the surrounding less damaged cartilage to move along with the severely worn cartilage during the removal process, thereby increasing the damage to the patient's own tissues and prolonging the patient's recovery period. Summary of the Invention

[0004] This invention provides a device for minimally invasive repair of knee cartilage, which solves the problem that existing minimally invasive knee cartilage repair devices have difficulty fixing cartilage with minor damage when removing loose or worn cartilage fragments, thus increasing the loss of the patient's own tissue and prolonging the patient's recovery period.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A device for minimally invasive repair of knee cartilage includes a pad with a stabilizing component. A pair of rotating shafts are mounted on one side of the pad via a fixed post. Sleeves are rotatably secured to the outer sides of both rotating shafts. The two sleeves are connected by a rotating frame. The stabilizing component includes connecting seats at both ends of the rotating frame. A retaining wheel is rotatably connected to the connecting seat, and a traction rope is secured to the outer side of the retaining wheel. A winding device is located at the rear of the pad, and the winding device is connected to one end of each of the two traction ropes. The free ends of the two traction ropes are connected by an inflatable ring.

[0007] Preferably, the inflation ring is filled with a low-melting-point solid gas, and a pressure membrane is connected to the inner side of the inflation tube. The pressure membrane is made of biomaterial and has a certain degree of elasticity.

[0008] Preferably, the connecting arm is provided with a fixed shaft, a rotating wheel is rotatably mounted on the fixed shaft, the rotating wheel is provided with a groove, and the traction rope is mounted on the outside of the groove.

[0009] Preferably, the rotating frame is provided with an expansion support assembly, which includes a pair of side slots opened on the rotating frame, an electromagnet is provided between the two side slots, and a magnetic plate is slidably engaged in the side slots.

[0010] Preferably, a connecting rod is provided at one end of the magnetic plate. The connecting rod is made of shape memory metal material. An expander is connected to the free end of the connecting rod, and the two expanders provided at the free ends of the two connecting rods are arranged opposite each other.

[0011] Preferably, an orientation component is provided between the fixed post and the sleeve. The orientation component includes a limiting groove opened on the fixed post. The sleeve is evenly provided with a plurality of the limiting grooves along the circumferential direction. An orientation block is slidably engaged in the limiting groove. A pair of orientation blocks located in the same vertical direction are connected by an elastic clamp.

[0012] Preferably, the pad is compressible in a vertical direction, and each end of the pad is connected to a pair of connecting straps, with each pair of connecting straps connected by a fastening assembly.

[0013] Preferably, the fastening assembly includes an adjustable belt connected to the free end of any of the connecting belts, and a folded belt connected to the free end of the other connecting belt in the same pair via an end plate. The free end of the adjustable belt is connected to the folded belt.

[0014] Preferably, a pair of adjustable ropes are threaded through the folding belt, and a fixed plate is connected to both adjustable ropes. A fixed plate is fixedly installed on the adjustable belt, and the fixed plate and the fixed plate are connected by a spring.

[0015] Preferably, the free ends of the two adjustable ropes are connected to a moving block, the bottom end of the moving block is provided with a guide groove, a guide rod is provided on the adjustable belt, the guide rod is locked in the guide groove, one end of the moving block is rotatably connected to a pair of clips through a torsion spring, both clips are clamped on the outside of the guide rod, and a control plate is provided on the clips.

[0016] The principle and beneficial effects of this technical solution:

[0017] (1) The stabilizing component set in this invention can compress the patient's knee joint cartilage. When the surgeon removes the severely damaged cartilage, the stabilizing component can compress and fix other cartilage that does not need to be removed, thereby reducing the displacement or dislodgement of other cartilage. Before using the stabilizing component, the pad is fixed to the back of the patient's knee joint by the fastening component. After adjusting the angle of the rotating frame, the incision on both sides of the patient's knee joint is expanded by the expansion component, so that the pressure membrane set inside the air ring presses the cartilage on one side of the patient's knee joint. Then, the pressure membrane can be cut open according to the previously confirmed position to remove part of the articular cartilage.

[0018] (2) The expansion component provided in this invention can expand the surgical incisions on both sides of the patient's knee joint, making it convenient for the surgeon to operate the stabilizing component. When using the expansion component, the elastic clip needs to be pushed inward first, so that the directional blocks connected to both ends of the elastic clip slide along the limiting groove until the directional blocks are disengaged from the limiting groove opened on the fixed column. At this time, the sleeve can be rotated along the fixed column to adjust the sleeve to an angle that does not affect the surgical operation. Then the elastic clip is released, the electromagnet is energized, so that the electromagnet repels the two magnetic plates, and the magnetic plates expand the patient's surgical incision through the expander connected by the connecting rod.

[0019] (3) The fastening component provided in this invention can fix the pad. When it is necessary to tighten the connecting strap, first use the two control plates on the two clips to operate the two clips respectively, so that the two clips separate and are released from the clamping of the guide rod. Then, pull the moving block connected to one end of the adjusting rope to make the moving block slide along the guide rod. While the adjusting rope moves, the fixed plate fixedly connected to it will move synchronously. Since the fixed plate and the fixed plate are connected by a spring, the fixed plate will compress the spring when it moves, which makes it easy to loosen the fastening component. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the disassembled structure of the present invention;

[0022] Figure 3 for Figure 2 Enlarged structural diagram of region A in the middle;

[0023] Figure 4 for Figure 2 A magnified structural diagram of region B in the middle;

[0024] The reference numerals in the accompanying drawings of the instruction manual include: 1. Pad; 2. Connecting belt; 3. Pressure film; 4. Inflatable ring; 5. End plate; 6. Slot; 7. Rotating wheel; 8. Fixed shaft; 9. Limiting groove; 10. Magnetic plate; 11. Expander; 12. Connecting rod; 13. Sleeve; 14. Connecting arm; 15. Pick wheel; 16. Rotating shaft; 17. Connecting seat; 18. Elastic clamp; 19. Fixed column; 20. Electromagnet; 21. Orienting block; 22. Side groove; 23. Rotating frame; 24. Adjustable belt; 25. Spring; 26. Adjustable rope; 27. Folding belt; 28. Guide rod; 29. ​​Fixed plate; 30. Guide groove; 31. Control plate; 32. Moving block; 33. Fixed plate; 34. Clamp; 35. Traction rope. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0026] Example:

[0027] like Figures 1 to 4 As shown, the present invention provides a device for minimally invasive repair of knee cartilage, including a pad 1, a stabilizing component on the pad 1, a pair of rotating shafts 16 on one side of the pad 1 via a fixing post 19, sleeves 13 being rotatably secured on the outer sides of the two rotating shafts 16, and the two sleeves 13 being connected by a rotating frame 23. The stabilizing component includes connecting seats 17 at both ends of the rotating frame 23, with chucks 15 rotatably connected to the connecting seats 17, and traction ropes 35 secured on the outer sides of the chucks 15. A winding device is provided on the rear side of the pad 1, and the winding device is connected to one end of each of the two traction ropes 35. The free ends of the two traction ropes 35 are connected by an inflatable ring 4.

[0028] like Figure 1 As shown, the inflation ring 4 is filled with a low-melting-point solid gas, and the inner side of the inflation tube 4 is connected to a pressure membrane 3. The pressure membrane 3 is made of biological material and has a certain elasticity.

[0029] like Figure 2 and Figure 3 As shown, a fixed shaft 8 is provided on the connecting arm 14, and a rotating wheel 7 is rotatably mounted on the fixed shaft 8. A slot 6 is provided on the rotating wheel 7, and the traction rope 35 is mounted on the outside of the slot 6.

[0030] like Figure 3 As shown, the rotating frame 23 is provided with an expansion assembly, which includes a pair of side slots 22 opened on the rotating frame 23. An electromagnet 20 is provided between the two side slots 22, and a magnetic plate 10 is slidably locked in the side slots 22.

[0031] like Figure 3 As shown, a connecting rod 12 is provided at one end of the magnetic plate 10. The connecting rod 12 is made of shape memory metal material. An expander 11 is connected to the free end of the connecting rod 12. The two expanders 11 provided at the free ends of the two connecting rods 12 are arranged opposite to each other.

[0032] The expansion assembly can expand the surgical incisions on both sides of the patient's knee joint, making it easier for the surgeon to operate the stabilizing component. When using the expansion assembly, the elastic clip 18 needs to be pushed inward first, so that the directional blocks 21 connected to both ends of the elastic clip 18 slide along the limiting groove 9 until the directional blocks 21 disengage from the limiting groove 9 opened on the fixing post 19. At this time, the sleeve 13 can be rotated along the fixing post 19 to adjust the sleeve 13 to an angle that does not affect the surgical operation. Then, the elastic clip 18 is released, and the elastic clip 18 is reset to fix the sleeve 13. The position of the expander 11 is adjusted through the connecting rod 12, and the expander 11 is inserted into the patient's surgical incision. The electromagnet 20 is energized, so that the electromagnet 20 repels the two magnetic plates 10, and the magnetic plates 10 expand the patient's surgical incision through the expander 11 connected by the connecting rod 12.

[0033] like Figure 3As shown, an orientation component is provided between the fixed column 19 and the sleeve 13. The orientation component includes a limiting groove 9 opened on the fixed column 19. Multiple limiting grooves 9 are evenly opened along the circumferential direction on the sleeve 13. An orientation block 21 is slidably locked in the limiting groove 9. A pair of orientation blocks 21 located in the same vertical direction are connected by an elastic clamp 18.

[0034] like Figure 1 As shown, the pad 1 can be compressed in the vertical direction. Both ends of the pad 1 are connected to a pair of connecting straps 2, and each pair of connecting straps 2 is connected by a fastening component.

[0035] like Figure 1 and Figure 4 As shown, the fastening assembly includes an adjustable belt 24 connected to the free end of any connecting belt 2, and a folded belt 27 connected to the free end of the other connecting belt 2 in the same pair via an end plate 5. The free end of the adjustable belt 24 is connected to the folded belt 27.

[0036] like Figure 4 As shown, a pair of adjustable ropes 26 are threaded on the folding belt 27, and a fixed plate 33 is connected to both adjustable ropes 26. A fixed plate 29 is fixedly installed on the adjustable belt 24, and the fixed plate 29 and the fixed plate 33 are connected by a spring 25.

[0037] like Figure 2 and Figure 4 As shown, the free ends of the two adjustable ropes 26 are connected to a moving block 32. The bottom end of the moving block 32 is provided with a guide groove 30. A guide rod 28 is provided on the adjustable belt 24. The guide rod 28 is locked in the guide groove 30. One end of the moving block 32 is rotatably connected to a pair of clips 34 through a torsion spring. Both clips 34 are clamped on the outside of the guide rod 28. A control plate 31 is provided on the clips 34.

[0038] The fastening assembly can fix the pad 1. When it is necessary to tighten the connecting strap 2, the two control plates 31 set on the two clips 34 are used to operate the two clips 34 respectively, so that the two clips 34 separate and are released from the clamping of the guide rod 28. Then, the moving block 32 connected to one end of the adjusting rope 26 can be pulled to make the moving block 32 slide along the guide rod 28. When the adjusting rope 26 moves, the fixed plate 33 fixedly connected to it will move synchronously. Since the fixed plate 29 and the fixed plate 33 are connected by a spring 25, the fixed plate 33 will compress the spring 25 when it moves, which makes it easy to loosen the fastening assembly.

[0039] The specific usage and function of this embodiment are as follows:

[0040] The stabilizing component in this invention can compress the cartilage of the patient's knee joint. When the surgeon is removing severely damaged cartilage, the stabilizing component can compress and fix other cartilage that does not need to be removed, thereby reducing the displacement or dislodgement of other cartilage. Before using the stabilizing component, the pad 1 is first fixed to the back of the patient's knee joint by the fastening component. After adjusting the angle of the rotating frame 23, the incisions on both sides of the patient's knee joint are widened by the expansion component. Then, an endoscope is inserted to observe and confirm the cartilage to be removed from the patient's knee joint. After confirmation, the cartilage is guided by instruments. The guide passes one end of any traction rope through the incisions on both sides of the patient until the inflatable ring 4, which connects the two traction ropes, is positioned on the cartilage side of the patient's knee joint. The low-melting-point solid filling the inflatable ring 4 will turn into gas, flattening the pressure membrane 3. The free ends of the two traction ropes are then connected to the winding device, and the traction ropes are tightened by the winding device. The traction ropes will slide outside the rotating wheel 7 locked on the fixed shaft 8 until the pressure membrane 3, located inside the inflatable ring 4, presses against the cartilage on one side of the patient's knee joint. The pressure membrane 3 can then be cut open according to the previously confirmed position to remove part of the articular cartilage.

[0041] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for minimally invasive repair of knee cartilage, characterized in that: The device includes a pad (1), on which a stabilizing component is provided. A pair of rotating shafts (16) are provided on one side of the pad (1) via a fixed column (19). Sleeves (13) are rotatably clamped on the outer side of each of the two rotating shafts (16). The two sleeves (13) are connected by a rotating frame (23). The stabilizing component includes connecting seats (17) provided at both ends of the rotating frame (23). A chuck (15) is rotatably connected on the connecting seat (17). A traction rope (35) is clamped on the outer side of the chuck (15). A winder is provided on the rear side of the pad (1). The winder is connected to one end of each of the two traction ropes (35). The free ends of the two traction ropes (35) are connected by an inflatable ring (4). The inflation ring (4) is filled with a low-melting-point solid gas. A pressure membrane (3) is connected to the inner side of the inflation ring (4). The pressure membrane (3) is made of biomaterial and is elastic. The rotating frame (23) is provided with a connecting arm (14). A fixed shaft (8) is provided on the connecting arm (14). A rotating wheel (7) is rotatably mounted on the fixed shaft (8). A slot (6) is opened on the rotating wheel (7). The traction rope (35) is mounted on the outside of the slot (6). The rotating frame (23) is provided with an expansion assembly, which includes a pair of side slots (22) opened on the rotating frame (23). An electromagnet (20) is provided between the two side slots (22). A magnetic plate (10) is slidably locked in the side slot (22). A connecting rod (12) is provided at one end of the magnetic plate (10). The connecting rod (12) is made of shape memory metal material. An expander (11) is connected to the free end of the connecting rod (12). The two expanders (11) provided at the free ends of the two connecting rods (12) are arranged opposite to each other. An orientation component is provided between the fixed column (19) and the sleeve (13). The orientation component includes a first limiting groove (9) opened on the fixed column (19), and a plurality of second limiting grooves are evenly opened along the circumferential direction in the sleeve (13). An orientation block (21) is slidably locked in the second limiting groove. A pair of orientation blocks (21) located in the same vertical direction are connected by an elastic clamp (18). The pad (1) can be compressed in the vertical direction. Both ends of the pad (1) are connected to a pair of connecting straps (2). Each pair of connecting straps (2) is connected by a fastening assembly. The fastening assembly includes an adjustable belt (24) connected to the free end of any of the connecting straps (2). The free end of the other connecting strap (2) in the same pair is connected to a folding belt (27) through an end plate (5). The free end of the adjustable belt (24) is connected to the folding belt (27).

2. The device for minimally invasive repair of knee cartilage according to claim 1, characterized in that: A pair of adjustable ropes (26) are threaded on the folding belt (27), and a fixed plate (33) is connected to both adjustable ropes (26). A fixed plate (29) is fixedly installed on the adjustable belt (24), and the fixed plate (29) and the fixed plate (33) are connected by a spring (25).

3. The device for minimally invasive repair of knee cartilage according to claim 2, characterized in that: The free ends of the two adjustable ropes (26) are connected to a moving block (32). The bottom end of the moving block (32) is provided with a guide groove (30). A guide rod (28) is provided on the adjustable belt (24). The guide rod (28) is locked in the guide groove (30). One end of the moving block (32) is rotatably connected to a pair of clips (34) through a torsion spring. Both clips (34) are clamped on the outside of the guide rod (28). A control plate (31) is provided on the clips (34).

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