Distraction device used in knee joint replacement

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a distraction device used in knee replacement, which comprises a telescopic supporting piece and a traction assembly, the telescopic supporting piece is used for supporting popliteal fossa and controlling the flexion and extension of legs at the same time, and the traction assembly is used for supporting the popliteal fossa. The number of the traction assemblies is at least two, and the traction assemblies are symmetrically distributed on the two sides of the telescopic supporting piece. The traction assembly comprises a supporting part connected with the upper end of the telescopic supporting piece, a connecting rod movably connected with the upper end of the supporting part, a rotating cylinder in threaded connection with the outer wall of the connecting rod and a traction head rotationally connected with the end, away from the connecting rod, of the rotating cylinder. According to the utility model, more than two groups of traction assemblies are arranged, so that the surgical site is fully exposed, more than two groups of traction assemblies enable the exposure range of the surgical incision to be larger and more uniform, and meanwhile, the telescopic support piece is placed below the popliteal space to support the popliteal space and assist the leg to carry out a flexion and extension test so as to evaluate the position and the function of the prosthesis.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a dispersing device used in knee replacement surgery. Background Technology

[0002] Knee replacement surgery, also known as total knee replacement, is a surgical procedure that replaces a damaged knee joint with an artificial joint. During the surgery, the surgeon cuts open the skin and soft tissue in front of the knee to expose the diseased joint structure, then removes the diseased tissue in the knee joint and uses specially designed metal and plastic components to re-establish the function of the knee joint, allowing the patient to restore normal joint range of motion and strength, thereby regaining joint function.

[0003] In knee replacement surgery, a dispersing device is typically used to externally expand the incised skin and soft tissue in front of the knee to fully expose the surgical site and facilitate the surgeon's operation. During the surgery, the flexion and extension of the leg are continuously controlled to test the position and function of the prosthesis. However, some existing dispersing devices are retractors. During surgery, an assistant inserts the retractor into the wound and then pulls on the skin and soft tissue. Although leg flexion and extension do not affect the traction effect, the manual traction is inconvenient, and the assistant's traction may obstruct the surgeon's view. Some non-manual traction devices are generally large and complex, only pulling on the skin and soft tissue at the wound site, and cannot simultaneously perform leg flexion and extension tests. Therefore, to address these issues, we propose a dispersing device for knee replacement surgery. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a spreading device for knee replacement surgery that not only avoids manual traction but also allows for leg flexion and extension tests while traction is applied to the skin and soft tissues at the knee.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a spreading device for knee replacement surgery, comprising a telescopic support and a traction assembly. The telescopic support is used to support the popliteal fossa while controlling the flexion and extension of the leg. The traction assembly consists of at least two sets symmetrically distributed on both sides of the telescopic support. Each traction assembly includes a support part connected to the upper end of the telescopic support, a connecting rod movably connected to the upper end of the support part, a rotating cylinder threaded to the outer wall of the connecting rod, and a traction head rotatably connected to the end of the rotating cylinder away from the connecting rod.

[0006] The beneficial effects of this utility model are as follows: the surgical incision at the knee is pulled by the traction component, so that the surgical site is fully exposed. Two or more sets of traction components make the surgical incision exposed to a larger and more uniform area. At the same time, the telescopic support is placed under the popliteal fossa to support the popliteal fossa and assist the leg in flexion and extension tests to evaluate the position and function of the prosthesis.

[0007] To facilitate support in the popliteal fossa while controlling leg flexion and extension;

[0008] As a further improvement to the above technical solution: the telescopic support includes a telescopic component and a support base connected to the upper end of the telescopic component.

[0009] The beneficial effects of this improvement are as follows: the patient's popliteal fossa is placed above the support seat, and when the leg needs to be bent, the telescopic component extends to lift the support seat and raise the popliteal fossa. When the leg needs to be extended, the telescopic component shortens to lower the support seat. At the same time, the lifting and lowering traction components of the telescopic component still pull on the skin and soft tissue at the incision site.

[0010] To increase patient comfort;

[0011] As a further improvement to the above technical solution: the upper end of the support base is arched upwards.

[0012] The beneficial effects of this improvement are: the upper end of the support seat is arched upwards, which adapts to the physiological characteristics of the human body, can provide effective support, and can increase the patient's comfort.

[0013] To facilitate adjustment of the position of the traction head;

[0014] As a further improvement to the above technical solution: a rotary knob is provided on the outer wall of the rotating drum, and anti-slip texture is provided on the outer wall of the rotary knob.

[0015] The beneficial effects of this improvement are as follows: when it is necessary to adjust the pulling force of the pulling head, the rotating drum needs to be rotated so that the rotating drum is threadedly connected to the connecting rod. The length between the rotating drum and the connecting rod is controlled, which indirectly controls the pulling force of the pulling head. The rotary knob makes it easy to rotate the rotating drum, and the anti-slip texture can increase the friction with the hand and prevent slippage.

[0016] To facilitate adjustment of the direction of the pull head;

[0017] As a further improvement to the above technical solution: the upper end of the support is connected to the connecting rod via a universal ball joint.

[0018] The beneficial effects of this improvement are: during use, the direction of the traction head can be controlled by the universal ball joint setting, realizing multi-angle adjustment of the traction head and making it more flexible to use.

[0019] In order to increase the load-bearing capacity of the telescopic support and to prevent overall slippage during use;

[0020] As a further improvement to the above technical solution: the bottom of the telescopic component is provided with a support plate, and the bottom of the support plate is provided with an anti-slip pad.

[0021] The beneficial effects of this improvement are as follows: the support plate can be set so that the bottom of the support plate contacts the bed surface during use, increasing the support area and support force of the bottom of the support device. In addition, the anti-slip pad can prevent the support device from sliding, increase the friction with the operating table surface, and avoid affecting the smooth progress of the operation. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a top view of the structure of this utility model;

[0024] Figure 3 This is a front view structural diagram of the present invention;

[0025] Figure 4 This is a three-dimensional structural diagram of the traction component of this utility model;

[0026] Figure 5 This is a cross-sectional structural diagram of the traction component of this utility model.

[0027] In the diagram: 1. Telescopic support; 101. Telescopic component; 102. Support base; 2. Pulling assembly; 201. Support part; 202. Connecting rod; 203. Rotary cylinder; 204. Pulling head; 3. Rotary knob; 4. Universal ball joint; 5. Support plate; 6. Anti-slip mat. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0029] like Figure 1-5As shown, a stretching device for knee replacement surgery includes a telescopic support 1 and a traction assembly 2. The telescopic support 1 includes a telescopic member 101 and a support seat 102 connected to the upper end of the telescopic member 101. The telescopic support 1 is used to support the popliteal fossa while controlling the flexion and extension of the leg. The traction assembly 2 consists of at least two sets symmetrically distributed on both sides of the telescopic support 1. The traction assembly 2 includes a support part 201 connected to the upper end of the telescopic support 1, a connecting rod 202 movably connected to the upper end of the support part 201, a rotating cylinder 203 threadedly connected to the outer wall of the connecting rod 202, and a traction head 204 rotatably connected to the end of the rotating cylinder 203 away from the connecting rod 202.

[0030] Specifically, the telescopic component 101 can be an electric telescopic rod, a hydraulic telescopic rod, etc. During knee replacement surgery, the traction head 204 is placed inside the surgical incision, close to the skin and soft tissue. Then, the rotating cylinder 203 is rotated. The rotating cylinder 203 is threadedly connected to the connecting rod 202, reducing the distance between the rotating cylinder 203 and the connecting rod 202, thereby controlling the traction head 204 to pull outward. When the traction force is appropriate, the rotation of the rotating cylinder 203 is stopped. At this time, two or more traction components 2 pull the incision, fully exposing the surgical site. During the traction surgery... To evaluate the position and function of the prosthesis, the leg needs to be continuously flexed and extended. Therefore, if a flexion-extension test is required while traction is being performed, the popliteal fossa can be raised and lowered by the telescopic component 101, which in turn raises and lowers the support seat 102. This allows two or more traction components 2 to rise and fall simultaneously. At the same time, the traction component 2 continuously tractions the incision. Regardless of whether the leg is flexed or extended, the surgical site can be fully exposed without affecting the doctor's observation. Therefore, during the operation, not only can manual traction be avoided, but a leg flexion-extension test can also be performed while traction is being applied to the skin and soft tissue at the knee.

[0031] Preferably, the upper end of the support seat 102 is arched upwards, which adapts to the physiological characteristics of the human body, can provide effective support, and can increase the patient's comfort.

[0032] Preferably, the outer wall of the rotating drum 203 is provided with a rotary knob 3, and the outer wall of the rotary knob 3 is provided with anti-slip texture. When it is necessary to adjust the pulling force of the pulling head 204, the rotating drum 203 needs to be rotated so that the rotating drum 203 is threadedly connected to the connecting rod 202, thereby controlling the length between the rotating drum 203 and the connecting rod 202, and indirectly controlling the pulling force of the pulling head 204. The rotary knob 3 makes it easy to rotate the rotating drum 203, and the anti-slip texture can increase the friction with the hand and prevent slippage.

[0033] Preferably, the upper end of the support part 201 is connected to the connecting rod 202 through a universal ball joint 4. During use, the direction of the pulling head 204 can be controlled by the setting of the universal ball joint 4, so as to realize multi-angle adjustment of the pulling head 204 and make it more flexible to use.

[0034] Preferably, the bottom of the telescopic member 101 is provided with a support plate 5, and the bottom of the support plate 5 is provided with an anti-slip pad 6. The anti-slip pad 6 can be made of rubber, silicone or other materials. The support plate 5 can be set so that the bottom of the support plate 5 contacts the bed surface during use, increasing the support area and support force of the bottom of the expansion device. In addition, the anti-slip pad 6 can prevent the expansion device from sliding, increase the friction with the operating table surface, and avoid affecting the smooth progress of the operation.

[0035] The working principle and usage procedure of this utility model are as follows: When using this device, firstly, the support plate 5 is placed on the operating table. At this time, the anti-slip pad 6 is in contact with the operating table surface to increase friction and prevent the support plate 5 from sliding. Then, the popliteal fossa of the patient's leg requiring knee replacement is placed above the support seat 102. Then, the telescopic component 101 rises and presses against the popliteal fossa, causing the patient's leg to be in a bent position. After the surgery begins, the doctor will cut open the skin and soft tissue in front of the knee to fully expose the surgical site. At this time, the skin and soft tissue at the incision site need to be stretched outward to avoid obstructing the surgical field of vision. Two or more traction heads 204 are placed inside the incision. Then, by rotating the rotary knob 3, the rotary knob 3 drives the rotating drum 203 to rotate. The rotating drum 203 and the connecting rod 202 rotate threadedly, turning the connecting rod 202 into the rotating drum 203. At the same time, the traction head 204 pulls the skin and soft tissue outward. After all the traction heads 204 have finished pulling, the surgical site is fully exposed, and the doctor then performs the following surgical operation. When it is necessary to assess the position and function of the prosthesis, the leg needs to be flexed and extended continuously so that the doctor can observe. The rise and fall of the telescopic component 101 drives the support seat 102 and the traction component 2 to rise and fall. The traction effect of the traction component 2 is not affected during the flexion and extension of the leg.

[0036] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the protection scope of this utility model.

Claims

1. A dispersing device for use in knee replacement surgery, characterized in that, include; Telescopic support (1), the telescopic support (1) is used to support the popliteal fossa while controlling the flexion and extension of the leg; The number of the traction components (2) is at least two and they are symmetrically distributed on both sides of the telescopic support (1). The traction components (2) include a support part (201) connected to the upper end of the telescopic support (1), a connecting rod (202) movably connected to the upper end of the support part (201), a rotating cylinder (203) threadedly connected to the outer wall of the connecting rod (202), and a traction head (204) rotatably connected to the end of the rotating cylinder (203) away from the connecting rod (202).

2. The dispersing device for knee replacement surgery according to claim 1, characterized in that: The telescopic support (1) includes a telescopic member (101) and a support base (102) connected to the upper end of the telescopic member (101).

3. The dispersing device for knee replacement surgery according to claim 2, characterized in that: The upper end of the support base (102) is arched upwards.

4. The dispersing device for knee replacement surgery according to claim 1, characterized in that: The outer wall of the rotating cylinder (203) is provided with a rotating knob (3), and the outer wall of the rotating knob (3) is provided with anti-slip texture.

5. The dispersing device for knee replacement surgery according to claim 1, characterized in that: The upper end of the support (201) is connected to the connecting rod (202) via a universal ball joint (4).

6. A dispersing device for knee replacement surgery according to claim 2, characterized in that: The bottom of the telescopic component (101) is provided with a support plate (5), and the bottom of the support plate (5) is provided with an anti-slip pad (6).

Images