Knee joint distraction device
By designing a knee joint opening device that includes a support assembly and an automatic locking assembly, the problems of large space occupation and reduced surgical efficiency of knee joint opening devices are solved, enabling more efficient knee joint surgery and reducing femoral injury.
Patent Information
- Application Number
- CN202422768724.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-14
AI Technical Summary
Existing knee joint spreaders have many components, complex structures, and large space requirements, which restricts the surgical operation of medical staff and affects surgical efficiency.
A knee joint dislocation device was designed, comprising a first support assembly, a second support assembly, a dislocation assembly, and an automatic locking assembly. Through a hinge and automatic locking mechanism, the femur and tibia are separated, providing sufficient operating space and reducing damage to the femoral end face.
It reduces the space occupied during surgical procedures, improves the efficiency of medical staff, reduces the risk of damage to the femoral end face, and prevents rebound through an automatic locking mechanism.
Smart Images
Figure CN223601485U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument equipment technical field especially is involved in a knee joint distraction device. BACKGROUND
[0002] The knee joint is the most complex joint of human movement, which is composed of the distal femur, the proximal tibia and the patella, accompanied by ligament, joint capsule and meniscus structure. Among them, meniscus tear and cartilage injury are the most common.
[0003] Knee arthroscopy surgery is a common orthopedic minimally invasive surgery, which is used for treating various knee joint diseases and injuries. In knee arthroscopy surgery, the joint space between the femur and the tibia often needs to be opened for the surgeon to have enough space for operation. Usually, an additional surgical assistant is needed to open the joint space and maintain this posture for a long time. The assistant often cannot expose the operation space for a long time because of exhaustion. Or the collateral ligament of the knee joint is released to increase the joint space, but it will cause damage to the ligament and may cause joint instability. The best way is to use a knee joint distractor. At present, the existing knee joint distractor has many components and complex structure. When the femur and the tibia are separated during the operation, it will occupy more operation space, which limits the position of the medical staff during the operation and reduces the efficiency of the knee joint operation.
[0004] Therefore, the technical personnel in the art are committed to developing a knee joint distraction device which occupies small space and reduces the limitation of medical staff during operation. UTILITY MODEL CONTENT
[0005] The utility model solves the technical problem to provide a knee joint distraction device which occupies small space and reduces the limitation of medical staff during operation
[0006] The technical scheme for solving the above technical problem of the utility model is as follows:
[0007] A knee joint distraction device comprises
[0008] A first support assembly;
[0009] A second support assembly, the first support assembly and the second support assembly are oppositely arranged, the first support assembly and the second support assembly are hinged through a connecting assembly, and a reset assembly is arranged between the first support assembly and the second support assembly;
[0010] A first distraction assembly, the first distraction assembly is vertically connected with the end of the first support assembly, and the end of the first distraction assembly has an abutting portion for abutting with the femur;
[0011] A second expansion assembly is vertically connected with the end of the second support assembly, and the second expansion assembly and the first expansion assembly are oppositely arranged.
[0012] An automatic locking assembly is hingedly connected with one end of the first support assembly and clampedly connected with the other end of the second support assembly.
[0013] The first expansion assembly and the second expansion assembly are inserted into the position of the knee joint of a patient, and the first support assembly and the second support assembly are pinched to make the first expansion assembly and the second expansion assembly away from each other, so that the femur and the tibia of the patient are separated, which is beneficial to subsequent operation of medical personnel.
[0014] The femur and the tibia are mainly separated through the first support assembly and the second support assembly, the number of parts is reduced, the medical personnel have a larger operation space, and the operation efficiency is improved.
[0015] The abutting portion is beneficial to abutting with the end surface of the femur, the contact area of the abutting portion and the femur is improved, and the damage of the end surface of the femur is reduced.
[0016] When the first support assembly and the second support assembly are pinched, the automatic locking assembly automatically locks the first support assembly and the second support assembly, and the rebound is avoided.
[0017] On the basis of the above technical scheme, the utility model further can make improvement as follows.
[0018] Further, the first support assembly comprises a first support plate, and the first support plate is rectangular.
[0019] The beneficial effect of the above further scheme is that the first support plate is rectangular, which is beneficial to holding and operating by medical personnel.
[0020] Further, the second support assembly comprises a second support plate, and the second support plate is rectangular.
[0021] The beneficial effect of the above further scheme is that the second support plate is rectangular, which is beneficial to holding and operating by medical personnel.
[0022] Further, the connecting assembly comprises a first connecting plate and a second connecting plate, two first connecting plates and two second connecting plates are respectively connected with the first support assembly and the second support assembly, the first connecting plate and the second connecting plate are provided with hinged holes at corresponding positions, and a hinge rod passes through the hinged holes to hinge the first connecting plate and the second connecting plate.
[0023] The beneficial effect of the further scheme is that the first connecting plate, the second connecting plate and the hinge rod cooperate to make the first connecting plate and the second connecting plate hinged, which is beneficial to separate the first distraction assembly and the second distraction assembly.
[0024] Further, the reset assembly comprises a pressure spring, the pressure spring is arranged on the hinge rod, and the pressure spring is in abutment with the first support assembly and the second support assembly on both sides.
[0025] The beneficial effect of the further scheme is that the pressure spring is used to abut the end portions of the first distraction assembly and the second distraction assembly.
[0026] Further, the first distraction assembly comprises a first distraction plate, the first distraction plate is vertically connected to the end portion of the first support plate, and the abutment portion is arranged at the end portion of the first distraction plate and away from the first support plate.
[0027] The beneficial effect of the further scheme is that the first distraction plate and the first support plate are vertically connected, and the position interference of the first support plate is reduced.
[0028] Further, the abutment portion is in a circular arc shape.
[0029] The beneficial effect of the further scheme is that the abutment portion is in an arc shape, which is beneficial to abut the end surface of the femur.
[0030] Further, the second distraction assembly comprises a second distraction plate, the first distraction plate and the second distraction plate are oppositely arranged, and the second distraction plate is provided with a tibia contact portion for abutting the tibia at the end portion of the second distraction plate and away from one side of the second support plate.
[0031] The beneficial effect of the further scheme is that the tibia contact portion can also be in an arc shape, which is used to abut the upper end surface of the tibia.
[0032] Further, the automatic locking assembly comprises a rack, one end of the rack is connected to the first support assembly through a hinge, the second support assembly is provided with a through hole at a relative position, the through hole is provided with a fixed tooth for clamping connection with the rack, and an abutment spring is also arranged in the through hole, the abutment spring is in abutment with the back surface of the rack and the inner wall of the through hole at both ends, so that the protruding tooth on the rack is clamped and connected with the fixed tooth.
[0033] The beneficial effect of the further scheme is that the abutment spring makes the protruding tooth and the fixed tooth clamped and connected tightly, so that the first support assembly and the second support assembly are self-locked. BRIEF DESCRIPTION OF DRAWINGS
[0034] Figure 1 It is a specific embodiment of the knee joint distraction device structure schematic view.
[0035] Figure 2 It is a specific embodiment of the utility model first support assembly and first strutting assembly structure schematic view;
[0036] Figure 3 It is a specific embodiment of the utility model knee joint strutting device use schematic view.
[0037] In the drawings, the component list represented by each sign is as follows:
[0038] 1, first support assembly;2, second support assembly;3, connecting assembly;4, reset assembly;5, first strutting assembly;6, abutment;7, second strutting assembly;8, automatic locking assembly;9, first support plate;10, second support plate;11, first connecting plate;12, second connecting plate;13, hinged rod;14, pressure spring;15, first strutting plate;16, second strutting plate;17, tibia contact part;18, rack;19, hinged piece;20, through hole. Specific implementation
[0039] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.
[0040] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential direction" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model to having a particular orientation, being constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0041] In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0042] In the utility model, unless otherwise specifically specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium;It can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0043] As Figure 1 ,Figure 2 and Figure 3 As shown in
[0044] The first support assembly 1 is provided with the first support plate 9, the second support assembly 2 is provided with the second support plate 10, and the first support plate 9 and the second support plate 10 are both made of a metal material with high strength.
[0045] The first support assembly 1 and the second support assembly 2 are oppositely arranged, are hingedly connected through the connecting assembly 3, and are provided with the reset assembly 4.
[0046] The first support assembly 1 is provided with the first support plate 9, the second support assembly 2 is provided with the second support plate 10, and the first support plate 9 and the second support plate 10 are both made of a metal material with high strength.
[0047] The second support assembly 7 is vertically connected to the end of the second support assembly 2 and is oppositely arranged with the first support assembly 5.
[0048] The automatic locking assembly 8 is hingedly connected to one end of the first support assembly 1 and is clampedly connected to the other end of the second support assembly 2.
[0049] In the utility model, after the first support assembly 5 and the second support assembly 7 are inserted into the position of the knee joint of the patient, the abutting portion 6 is abutted with the middle and rear area of the medial condyle of the femur of the knee joint, the end of the second support assembly 7 is abutted with the cartilage surface of the medial surface of the tibial plateau, the abutting portion 6 reduces the pressure on the cartilage of the medial condyle of the femur of the knee joint, then the first support assembly 1 and the second support assembly are pinched and locked through the automatic locking assembly 8, so that the femur and the tibia at the knee joint of the patient are separated, and this is beneficial to the subsequent operation of the medical staff.
[0050] As shown in Figure 1 、 Figure 2 In some embodiments, the first support assembly 1 comprises the first support plate 9, the first support plate 9 is rectangular, the second support assembly 2 comprises the second support plate 10, the second support plate 10 is rectangular, and the first support plate 9 and the second support plate 10 are both made of a metal material with high strength.
[0051] In some embodiments, the connecting assembly 3 comprises the first connecting plate 11 and the second connecting plate 12, the first connecting plate 11 and the second connecting plate 12 are both semicircular, two first connecting plates 11 and two second connecting plates 12 are respectively connected with the first support assembly 1 and the second support assembly 2, the two first connecting plates 11 are both located inside the two second connecting plates 12, the first connecting plate 11 and the second connecting plate 12 are both provided with the hinge hole at the corresponding positions, and the hinge rod 13 passes through the hinge hole to hinge the first connecting plate 11 and the second connecting plate 12 so that the first connecting plate 11 and the second connecting plate 12 can rotate around the hinge rod 13.
[0052] In one embodiment, the reset assembly 4 comprises a compression spring 14, which is arranged on the articulated rod 13 and between the two first connecting plates 11, and which abuts against the first bracket assembly 1 and the second bracket assembly 2 respectively.
[0053] In this embodiment, the first distraction assembly 5 comprises a first distraction plate 15, which is perpendicularly connected to the end of the first bracket plate 9, and which is provided with an abutting portion 6 at the end away from the first bracket plate 9. Specifically, the abutting portion 6 is in the shape of a circular arc. The second distraction assembly 7 comprises a second distraction plate 16, which is arranged opposite to the first distraction plate 15. The second distraction plate 16 is provided with a tibia contact portion 17 at the end away from one side of the second bracket plate 10, which is used to abut against the tibia. In this embodiment, the tibia contact portion 17 is also in the shape of a circular arc.
[0054] In some embodiments, the automatic locking assembly 8 comprises a rack 18, one end of which is connected to the first bracket assembly 1 through a hinge 19, specifically, the lower side of the first bracket plate 9. The second bracket assembly 2 is provided with a through hole 20 at the opposite position, which is provided with a fixed tooth (not shown in the figure) for clamping connection with the rack 18. The through hole 20 is also provided with an abutting spring (not shown in the figure), and the rack 18 passes through the through hole 20. The abutting spring abuts against the back of the rack 18 and the inner wall of the through hole 20 respectively, so that the protruding teeth on the rack 18 are clamped and connected with the fixed tooth. In specific embodiments, the rack 18 is plated with a scale equivalent to the expansion distance of the distractor (the distance between the abutting portion 6 and the tibia contact portion 17), which provides a quantitative index for the joint space distraction for the operator, and is beneficial for the medical staff to judge the distraction distance between the tibia and the femur in time.
[0055] When the operation is completed, the rack 18 is pushed and the abutting spring is compressed, so that the protruding teeth on the rack 18 are disengaged from the clamping of the fixed tooth. The automatic locking assembly 8 is released, and under the action of the compression spring 14, the first distraction plate 15 and the second distraction plate 16 approach and abut against each other.
[0056] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.
[0057] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A knee distraction device, characterized by: Comprising a first support assembly (1); a second support assembly (2), the first support assembly (1) and the second support assembly (2) are oppositely arranged, the first support assembly (1) and the second support assembly (2) are hinged through a connecting assembly (3), and a reset assembly (4) is arranged between the first support assembly (1) and the second support assembly (2); a first distraction assembly (5), the first distraction assembly (5) is vertically connected with the end of the first support assembly (1), and the end of the first distraction assembly (5) has an abutting portion (6) for abutting with the femur; a second distraction assembly (7), the second distraction assembly (7) is vertically connected with the end of the second support assembly (2), and the second distraction assembly (7) and the first distraction assembly (5) are oppositely arranged; an automatic locking assembly (8), one end of the automatic locking assembly (8) is hingedly connected with the first support assembly (1), and the other end of the automatic locking assembly (8) is clamped with the second support assembly (2).
2. The knee distraction device of claim 1, wherein: The first support assembly (1) comprises a first support plate (9), and the first support plate (9) is in a rectangular shape.
3. The knee distraction device of claim 2, wherein: The second support assembly (2) comprises a second support plate (10), and the second support plate (10) is in a rectangular shape.
4. The knee distraction device of claim 1, wherein: The connecting assembly (3) comprises a first connecting plate (11) and a second connecting plate (12), two first connecting plates (11) and two second connecting plates (12) are respectively connected with the first support assembly (1) and the second support assembly (2), the first connecting plate (11) and the second connecting plate (12) are provided with hinge holes at corresponding positions, and a hinge rod (13) penetrates through the hinge holes to hinge the first connecting plate (11) and the second connecting plate (12).
5. The knee distraction device of claim 4, wherein: The reset assembly (4) comprises a pressure spring (14), the pressure spring (14) is penetrated on the hinge rod (13), and the pressure spring (14) is respectively abutted with the first support assembly (1) and the second support assembly (2) on both sides.
6. The knee distraction device of claim 3, wherein: The first distraction assembly (5) comprises a first distraction plate (15), the first distraction plate (15) is vertically connected with the end of the first support plate (9), and the end of the first distraction plate (15) is provided with the abutting portion (6) away from the first support plate (9).
7. The knee distraction device of claim 6, wherein: The abutting portion (6) is in a circular arc shape.
8. The knee distraction device of claim 6, wherein: The second distraction assembly (7) comprises a second distraction plate (16), the first distraction plate (15) and the second distraction plate (16) are oppositely arranged, and the end of the second distraction plate (16) is provided with a tibia contact portion (17) for abutting with the tibia away from one side of the second support plate (10).
9. The knee distraction device of claim 1 wherein: The automatic locking assembly (8) comprises a rack (18) connected with the first support assembly (1) through a hinge (19) at one end, and a through hole (20) is arranged at the opposite position of the second support assembly (2), the through hole (20) is provided with a fixed tooth for clamping connection with the rack (18), and an abutting spring is further installed in the through hole (20), and the abutting spring is abutted with the back surface of the rack (18) and the inner wall of the through hole (20) at both ends, so that the protruding teeth on the rack (18) are clamped and connected with the fixed tooth.