Unicondylar arthroplasty thighbone positioning device

Abstract

The utility model discloses a femur positioning device for unicompartmental knee arthroplasty, which relates to the technical field of unicompartmental ankle arthroplasty and comprises a positioning block, a positioning hole is arranged on one side of the positioning block, and a reinforcing mechanism is arranged on one side of the positioning block. The reinforcing mechanism comprises a first bandage fixedly connected to one side of the positioning block, and one side of the first bandage is fixedly connected with a placing shell, so that the problems that the main body is not stable enough on the legs of the patient and the body is not stable enough due to the fact that the main body is only placed between the oxford single-condyle femoral prosthesis and the oxford single-condyle tibia prosthesis through the vertical positioning part are solved; in order to solve the problems that in the prior art, a first binding band and a second binding band in the device can be wound and bound to the legs of a patient, then a second clamping block can extrude and drive a first clamping block to rotate, the first clamping block can limit the second binding band through the second clamping block, and at the moment, the first binding band and the second binding band can be fixed to the legs of the patient; therefore, the positioning block is more stable between the oxford single-condyle femoral prosthesis and the oxford single-condyle tibia prosthesis of the patient.

Description

Technical Field

[0001] The utility model relates to the technical field of unicompartmental replacement, and more specifically to a unicompartmental replacement femoral positioning device. Background Art

[0002] Unicompartmental knee replacement is a type of knee-preserving surgical treatment. In the middle stage of senile osteoarthritis, one side of the femur is damaged, while the other side is not damaged. The damaged joint surface is replaced, which is called unicompartmental knee replacement. Unicompartmental knee replacement is a surface replacement surgery, which is to remove the surface bone and cartilage, and then stick the unicompartment with bone cement. It is a prosthesis replacement. Generally, it is senile osteoarthritis. In the early stage, conservative treatment is the main treatment. In the middle and late stages, knee-preserving surgery is performed. In the late stage, knee replacement surgery is performed. In the unicompartmental knee replacement surgery, the patient needs to flex the knee 20° to 30°, push the patella outward, find the place to insert the femoral osteotomy guide, drill a hole, and use an aspirator to suck out the intramedullary fat tissue for decompression.

[0003] For example, the utility model with the announcement number CN215079270U discloses a locator for unicompartmental replacement of the knee joint and femoral osteotomy, wherein the vertical positioning part at the left end of the main body can fit the Oxford unicompartmental femoral prosthesis, the positioning curved surface fits the Oxford unicompartmental tibial prosthesis on the tibia, and the Oxford unicompartmental femoral prosthesis and the Oxford unicompartmental tibial prosthesis are positioned by the vertical positioning part and the positioning curved surface, which is simple and convenient, and does not require a positioning rod. At the same time, the horizontal positioning part can position the horizontal direction, and the fixing bolt positioning hole facilitates the installation of the fixing bolt, and the Kirschner wire positioning hole facilitates the installation of the Kirschner wire. The main body can also be buckled with a backing plate to achieve left-right and front-back thickness position adjustment, which is flexible to use.

[0004] Regarding the above scheme: The inventor believes that the above reference document places the vertical positioning portion at the left end of the main body between the Oxford unicompartmental femoral prosthesis and the Oxford unicompartmental tibial prosthesis, and then positions it through the horizontal positioning portion. However, since the main body is only fixed by placing it between the Oxford unicompartmental femoral prosthesis and the Oxford unicompartmental tibial prosthesis through the vertical positioning portion, the main body is not stable enough on the patient's leg and is prone to shaking and falling off. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a unicompartmental femoral positioning device, which can effectively solve the problem that the main body is not stable enough on the patient's leg and is prone to shaking and falling off because the main body is only fixed by placing the vertical positioning part between the Oxford unicompartmental femoral prosthesis and the Oxford unicompartmental tibial prosthesis.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A unicompartmental femoral positioning device comprises a positioning block, a positioning hole is provided on one side of the positioning block, and a reinforcement mechanism is provided on one side of the positioning block;

[0008] The reinforcement mechanism includes a first strap fixedly connected to one side of the positioning block, one side of the first strap is fixedly connected to a placement shell, the side of the positioning block away from the first strap is fixedly connected to a second strap, and the second strap is slidably connected to the inside of the placement shell, the inside of the placement shell is rotatably connected to a rotating rod, the outer side of the rotating rod is fixedly connected to a first clamping block, one side of the first clamping block is fixedly connected to a spring, and the spring is fixedly connected to the placement shell, the lower side of the second strap is fixedly connected to a second clamping block, and a plurality of second clamping blocks are provided.

[0009] As a preferred solution of the utility model, a first hollow groove is opened on the upper side of the placement shell, the placement shell is rotatably connected to a connecting rod inside the first hollow groove, and the connecting rod is fixedly connected to the rotating rod.

[0010] As a preferred solution of the utility model, a fixing block is fixedly connected to the upper side of the connecting rod, and an anti-slip pattern is provided on the outer side of the fixing block, and a plurality of anti-slip patterns are provided.

[0011] As a preferred solution of the utility model, a second hollow groove is opened inside the placement shell, the placement shell is located inside the second hollow groove and is rotatably connected to a limiting block, and the limiting block is fixedly connected to the rotating rod.

[0012] As a preferred solution of the utility model, a connecting block is fixedly connected to one side of the second binding strap, and the connecting block is in a triangular shape.

[0013] As a preferred solution of the utility model, a first sponge pad is fixedly connected to one side of the first strap, and a second sponge pad is fixedly connected to one side of the second strap close to the first strap.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] 1. The positioning block in the device can be placed between the Oxford unicompartmental femoral prosthesis and the Oxford unicompartmental tibial prosthesis, and the first strap and the second strap can be wrapped around and tied to the patient's leg, and then the second strap and the second block are moved into the interior of the placement shell, and the second block squeezes and drives the first block to rotate. When the second block moves to one side of the first block, the first block will be rebounded back to its original position by the spring, thereby limiting the second strap through the second block, so that the second strap is not easy to separate from the placement shell. At this time, the first strap and the second strap can be fixed to the patient's leg, so that the positioning block is more stable between the patient's Oxford unicompartmental femoral prosthesis and the Oxford unicompartmental tibial prosthesis, and is not easy to shake or fall off.

[0016] 2. A connecting rod can be placed in the internal retaining portion of the first hollow groove in the device, so that the connecting rod can be connected to the rotating rod, and then the connecting rod can drive the rotating rod and the first clamping block to rotate together when rotating, so that the first clamping block can be separated from the second clamping block by rotation, so that the second strap can be taken out from the inside of the placement shell and no longer tied to the leg, thereby achieving the effect of disassembling the positioning block. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0019] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 4 It is a schematic cross-sectional structure diagram of a placement shell in an embodiment of the utility model;

[0021] Figure 5 For this utility model Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0022] Figure 6 For this utility model Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0023] Figure 7 It is a structural schematic diagram of the utility model from another perspective.

[0024] Description of the numbers in the figure:

[0025] 1. Positioning block; 2. Positioning hole; 31. First binding strap; 32. Second binding strap; 33. Placement shell; 34. Rotating rod; 35. First clamping block; 36. Second clamping block; 37. Spring; 41. First hollow groove; 42. Connecting rod; 51. Fixed block; 52. Anti-slip pattern; 61. Second hollow groove; 62. Limiting block; 71. First sponge pad; 72. Second sponge pad; 8. Connecting block. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0027] See also Figure 1-7 A unicompartmental femoral positioning device comprises a positioning block 1, a positioning hole 2 is provided on one side of the positioning block 1, a reinforcement mechanism is provided on one side of the positioning block 1, and the positioning block 1 is L-shaped, so that the positioning block 1 can be placed between an Oxford unicompartmental femoral prosthesis and an Oxford unicompartmental tibial prosthesis, and then a hole can be drilled through the positioning hole 2, and the intramedullary fat tissue can be sucked out with an aspirator to decompress.

[0028] The reinforcement mechanism includes a first strap 31 fixedly connected to one side of the positioning block 1, a placement shell 33 is fixedly connected to one side of the first strap 31, a second strap 32 is fixedly connected to the side of the positioning block 1 away from the first strap 31, and the second strap 32 is slidably connected to the inside of the placement shell 33, the first strap 31 and the second strap 32 are respectively located on both sides of the positioning block 1, so that when the positioning block 1 is located between the Oxford unicompartmental femoral prosthesis and the Oxford unicompartmental tibial prosthesis, the first strap 31 and the second strap 32 can be wrapped around and tied to the patient's legs, and the inside of the placement shell 33 can be placed with a rotating rod 34, a first clamping block 35 and a second clamping block 36.

[0029] In addition, the interior of the placement shell 33 is rotatably connected to a rotating rod 34, the outer side of the rotating rod 34 is fixedly connected to a first card block 35, one side of the first card block 35 is fixedly connected to a spring 37, and the spring 37 is fixedly connected to the placement shell 33, and the lower side of the second binding band 32 is fixedly connected to a second card block 36, and a plurality of second card blocks 36 are provided, the rotating rod 34 can be connected to the first card block 35, so that the first card block 35 can rotate inside the placement shell 33, the second card block 36 can be driven by the second binding band 32 to move, and the second card block 36 can squeeze and drive the first card block 35 to rotate when moving, and the first card block 35 can push the second card block 36 to rotate. 6 is limited so that the second clamping block 36 cannot move back, so that the second strap 32 can be stabilized inside the placement shell 33, which enables the first strap 31 and the second strap 32 to be fixed to the patient's leg, so that the positioning block 1 is more stable between the patient's Oxford unicompartmental femoral prosthesis and the Oxford unicompartmental tibial prosthesis, and is not prone to shaking and falling off. The spring 37 can support the first clamping block 35, so that the first clamping block 35 can be stabilized, and at the same time, the rotated first clamping block 35 can be rebounded to its original position. Since a plurality of second clamping blocks 36 are provided, the second strap 32 and the first strap 31 can be tied to the legs of patients with different thicknesses.

[0030] Specifically, a first hollow groove 41 is opened on the upper side of the placement shell 33, and the placement shell 33 is located inside the first hollow groove 41 and is rotatably connected to a connecting rod 42, and the connecting rod 42 is fixedly connected to the rotating rod 34. The internal retaining portion of the first hollow groove 41 can be used to place the connecting rod 42, so that the connecting rod 42 can be connected to the rotating rod 34, and then the connecting rod 42 can drive the rotating rod 34 and the first clamping block 35 to rotate together when rotating, so that the first clamping block 35 can be disengaged from the second clamping block 36 by rotating, so that the second strap 32 can be taken out from the inside of the placement shell 33 and no longer tied to the leg, thereby achieving the effect of disassembling the positioning block 1.

[0031] Specifically, a fixing block 51 is fixedly connected to the upper side of the connecting rod 42, and an anti-slip groove 52 is provided on the outer side of the fixing block 51. The diameter of the fixing block 51 is larger than the diameter of the connecting rod 42, which makes it more convenient for people to rotate the connecting rod 42 and avoids the difficulty in rotating the connecting rod 42 due to the thinness of the connecting rod 42. The anti-slip groove 52 prevents people from slipping when rotating the fixing block 51, and a plurality of anti-slip grooves 52 are provided to achieve a better anti-slip effect.

[0032] Specifically, a second hollow groove 61 is opened inside the placement shell 33, and the placement shell 33 is rotatably connected to the limiting block 62 inside the second hollow groove 61, and the limiting block 62 is fixedly connected to the rotating rod 34. The second hollow groove 61 and the limiting block 62 are both T-shaped cylindrical, so that the limiting block 62 can rotate inside the second hollow groove 61, and the second hollow groove 61 can also limit the limiting block 62, and limit the rotating rod 34 through the limiting block 62, so that the rotating rod 34 is more stable inside the placement shell 33 and is not easy to move or detach.

[0033] Specifically, a connecting block 8 is fixedly connected to one side of the second strap 32, and the connecting block 8 is triangular in shape. The connecting block 8 allows the second strap 32 to be moved to the interior of the placement shell 33 more smoothly and conveniently, and is less likely to have difficulty in moving into the interior of the placement shell 33.

[0034] Specifically, a first sponge pad 71 is fixedly connected to one side of the first strap 31, and a second sponge pad 72 is fixedly connected to one side of the second strap 32 close to the first strap 31. The first sponge pad 71 and the second sponge pad 72 can make the patient more comfortable when the first strap 31 and the second strap 32 are tied to the patient's legs.

[0035] The working principle and use process of the utility model are as follows: when using the device, firstly, the lower side of the positioning block 1 is placed between the Oxford unicompartmental femoral prosthesis and the Oxford unicompartmental tibial prosthesis, and then the first strap 31 and the second strap 32 are tied to the patient's leg, and then the second strap 32 is moved into the interior of the placement shell 33, and at the same time, the second strap 32 will drive the second clamping block 36 to move together, and then the second clamping block 36 will squeeze and drive the first clamping block 35 to rotate, and the first clamping block 35 will squeeze the spring 37 to contract, and when the second clamping block 36 moves to one side of the first clamping block 35, the first clamping block 35 will be rebounded to its original position by the spring 37, so that it is located between the two second clamping blocks 36, and The second clamping block 36 limits the second strap 32 so that the second strap 32 is not easily separated from the placement shell 33. At this time, the first strap 31 and the second strap 32 can be fixed on the patient's leg, so that the positioning block 1 is more stable between the patient's Oxford unicompartmental femoral prosthesis and the Oxford unicompartmental tibial prosthesis, and is not prone to shaking or falling off. After that, drilling can be performed through the positioning hole 2, and the intramedullary fat tissue can be sucked out with an aspirator to reduce pressure. At this point, the problem that the main body is not stable enough on the patient's leg and is prone to shaking and falling off can be solved because the main body is only fixed by placing it between the Oxford unicompartmental femoral prosthesis and the Oxford unicompartmental tibial prosthesis through the vertical positioning part.

[0036] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. A unicompartmental femoral positioning device, comprising a positioning block (1), characterized in that: A positioning hole (2) is provided on one side of the positioning block (1), and a reinforcement mechanism is provided on one side of the positioning block (1); The reinforcement mechanism comprises a first strap (31) fixedly connected to one side of the positioning block (1); one side of the first strap (31) is fixedly connected to a placement shell (33); a side of the positioning block (1) away from the first strap (31) is fixedly connected to a second strap (32); the second strap (32) is slidably connected to the inside of the placement shell (33); a rotating rod (34) is rotatably connected to the inside of the placement shell (33); a first clamping block (35) is fixedly connected to the outside of the rotating rod (34); one side of the first clamping block (35) is fixedly connected to a spring (37); the spring (37) is fixedly connected to the placement shell (33); a lower side of the second strap (32) is fixedly connected to a second clamping block (36); and a plurality of second clamping blocks (36) are provided.

2. A unicompartmental femoral positioning device according to claim 1, characterized in that: A first hollow groove (41) is formed on the upper side of the placement shell (33), and the placement shell (33) is rotatably connected to a connecting rod (42) located inside the first hollow groove (41), and the connecting rod (42) is fixedly connected to the rotating rod (34).

3. A unicompartmental femoral positioning device according to claim 2, characterized in that: A fixing block (51) is fixedly connected to the upper side of the connecting rod (42), and an anti-slip pattern (52) is provided on the outer side of the fixing block (51), and a plurality of anti-slip patterns (52) are provided.

4. The unicompartmental femoral positioning device according to claim 1, characterized in that: A second hollow groove (61) is provided inside the placement shell (33), and the placement shell (33) is rotatably connected to a limit block (62) inside the second hollow groove (61), and the limit block (62) is fixedly connected to the rotating rod (34).

5. The unicompartmental femoral positioning device according to claim 1, characterized in that: A connection block (8) is fixedly connected to one side of the second binding belt (32), and the connection block (8) is in a triangular shape.

6. The unicompartmental femoral positioning device according to claim 1, characterized in that: A first sponge pad (71) is fixedly connected to one side of the first binding strap (31), and a second sponge pad (72) is fixedly connected to one side of the second binding strap (32) close to the first binding strap (31).

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