Joint positioning auxiliary device for lower limb knee joint operation

Abstract

The utility model discloses a joint positioning auxiliary device for a lower limb knee joint operation, which redesigns a stable bearing pad and constraint fixing mode of limbs at two ends of a joint compared with a traditional manual auxiliary fixing and pillow supporting fixing mode of medical staff and a common intra-operative joint fixing mode. The arranged supporting mechanism can flexibly adjust the height of the joint when the joint is bent through the stretching and retracting of the supporting rod in cooperation with the stretching and retracting of the thigh base plate and the shank base plate, the lifting requirements of limbs with different heights can be met, and patients with different limb lengths can also be flexibly met; the top end of the bearing cushion mechanism is adjusted to ascend and descend by the supporting mechanism, the angle of the bearing cushion mechanism is changed by being matched with the bottom end of the bearing cushion mechanism driven by the adjusting mechanism, the bearing cushion structure can independently adjust and fix the angles of limbs at the two ends of a bone joint, and the requirements of different joint positioning and limb fixing are met conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and in particular relates to a joint positioning auxiliary device for lower limb knee joint surgery. Background Art

[0002] Traditional Chinese medicine traumatology is a science that studies the prevention and treatment of injuries and diseases of the human skin, flesh, tendons, bones, qi and blood, internal organs and meridians. In ancient times, it belonged to the categories of fractures and ulcers, and historically, this discipline has been called ulcers, bone setting, bone setting, and traumatology. Traditional Chinese medicine traumatology has a long history. It was created and developed in the long-term struggle of people of all ethnic groups in my country against traumatic diseases, and has formed a rich theoretical system, becoming an independent discipline and an important part of traditional Chinese medicine.

[0003] Fractures and bone and joint injuries are relatively serious traumas. After a fracture occurs, the muscles attached to the bone will undergo spasmodic contraction, which is very painful. Because the healing of fractures takes a long time, external fixators must be used to maintain the correct position of the fracture after reduction to prevent it from shifting again.

[0004] Nowadays, joints need to be positioned during and after surgery after bone and joint injuries or limb fractures. The current simple operation usually uses soft pillows or medical staff to fix the joints and limbs by hand: or uses hard splints for binding and fixation. These positioning or fixation methods usually have the following technical problems: 1. The fixed position and angle cannot be adjusted freely, resulting in low applicability, and may even cause joint damage due to the inability to adjust to a suitable fixed angle and position, causing certain harm to the patient; 2. The manual support operation by medical staff reduces the doctor's operating space. At the same time, manual pressing has certain uncertainties and cannot always maintain the pressing state, resulting in poor positioning of the patient's joints; 3. Joint surgery for joint injuries cannot fully expose the joint area.

[0005] Therefore, there is a need to provide a joint positioning auxiliary device for lower limb knee joint surgery, so that orthopedic patients can position the joints or limbs during surgery, ensure that the limbs or joints will not move and thus affect the treatment effect, and improve the success rate of the surgery. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a joint positioning auxiliary device for lower limb knee joint surgery, which is designed based on the restraint fixation and flexible adjustment mode of the limbs at both ends of the joint. The device is placed flat on the nursing bed, and all structures except the restraint belt are located under the body, which is not easy to cause bumps and displacements; the limbs at both ends of the joint can be adjusted in angle separately; by controlling the extension and retraction of the support rod, the joint positioning requirements of patients with different limb lengths can be flexibly adapted, the front and rear width is narrow, and the space occupied is small. When a unilateral limb is used, it does not affect the activity of the other limb;

[0007] In order to achieve the above technical objectives, the utility model is implemented through the following technical solutions:

[0008] A joint positioning auxiliary device for lower limb knee joint surgery, comprising: a supporting mechanism, a cushioning mechanism, and an adjusting mechanism;

[0009] The support mechanism includes a base and a support rod; the support mechanism includes a thigh pad and a calf pad which are rotatably connected to both sides of the top end of the support rod; the bottom ends of the thigh pad and the calf pad are respectively mounted on the adjustment mechanism, and are driven by the adjustment mechanism to rotate relative to the base;

[0010] The adjusting mechanism comprises a bevel gear set, a threaded rod, and a threaded slider; the adjusting mechanism provides power through the meshing of the bevel gear set to drive the threaded rod to rotate, and further drive the threaded slider to slide on the base; the thigh pad and the calf pad are rotatably mounted on the adjusting mechanism through the threaded slider;

[0011] Furthermore, the support rod is a rod that can be extended in the vertical direction, and a shaft ring is arranged on the top. The shaft ring is a U-shaped structure, and a symmetrical rotating shaft is integrally connected to the top end extending inward; the thigh pad and the calf pad are both rotatably connected to the shaft ring through the rotating shaft; there is a gap between the two rotating shafts;

[0012] Furthermore, the thigh pad and the calf pad are both telescopic structure plates, including a lower plate at the bottom and an upper plate at the top;

[0013] Furthermore, the upper plate and the lower plate are both equipped with a plurality of restraint belts; the restraint belts include but are not limited to elastic belts, snap-on restraint belts, and Velcro restraint belts;

[0014] Furthermore, a recessed portion recessed downward is formed on the top of the upper plate;

[0015] Furthermore, a foot pad is fixedly connected to the lower plate of the calf pad, and the foot pad is inclined upward;

[0016] Furthermore, the bevel gear set transmits the circular motion in the horizontal plane to the circular motion in the vertical plane.

[0017] Furthermore, two collinear slide rails are provided on both sides of the base, and the two threaded sliders slide independently on the two slide rails respectively; the slide rail is a recessed structure, which is recessed downward from the upper surface of the base to form a slide rail with a straight track;

[0018] Furthermore, the end surface of the base close to one end of the thigh pad is rounded;

[0019] The beneficial effects of the utility model are:

[0020] The utility model provides a joint positioning auxiliary device for lower limb knee joint surgery. Compared with the traditional manual auxiliary fixation and pillow support fixation methods of medical staff and the common intraoperative joint fixation methods, the device redesigns the stable support pads and constraint fixation methods of the limbs at both ends of the joint. The support mechanism is arranged to flexibly adjust the height of the joint when it is flexed through the extension and contraction of the support rod, in conjunction with the extension and contraction of the thigh pad and the calf pad, so that it can adapt to the limb lifting requirements of different heights and can flexibly adapt to patients with different limb lengths.

[0021] The top of the cushion mechanism is adjusted to rise and fall by the support mechanism, and the bottom end is driven by the adjustment mechanism to change the angle. The cushion structure can independently adjust the angle and fix the position of the limbs at both ends of the bone joint, so as to adapt to different joint positioning and limb fixation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the overall structure of the utility model from another perspective;

[0025] Figure 3 It is the front view of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the support mechanism of the utility model;

[0027] Figure 5 The utility model Figure 4A schematic diagram of the enlarged local structure at point A in the middle;

[0028] Figure 6 It is a cross-sectional structural schematic diagram of the support mechanism of the utility model;

[0029] Figure 7 The utility model Figure 6 A magnified schematic diagram of the local structure at B in the middle;

[0030] Figure 8 It is a structural schematic diagram of the cushion mechanism of the utility model;

[0031] Fig. 9 It is a cross-sectional structural schematic diagram of the cushion mechanism of the utility model;

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 1-support mechanism, 101-base, 102-support rod, 103-shaft ring, 1031-rotating shaft, 104-gap, 105-slide rail, 106-rounded corner, 2-support mechanism, 201-thigh pad, 202-calf pad, 2001-lower plate, 2002-upper plate, 203-restraint belt, 204-recessed portion, 205-foot pad, 3-adjustment mechanism, 301-bevel gear set, 302-threaded rod, 303-threaded slider. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions 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 of 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.

[0035] Example 1

[0036] See also Figure 1-Figure 9 In this embodiment, a joint positioning auxiliary device for lower limb knee joint surgery includes: a supporting mechanism 1, a cushioning mechanism 2, and an adjusting mechanism 3; the supporting mechanism 1 is a structure for sharing the gravity pressure of the joint and the limbs at both ends of the joint; the cushioning mechanism 2 is a structure for directly contacting and cushioning the limbs at both ends of the joint; the adjusting mechanism 3 is a component for cooperating with the supporting mechanism 1 to adjust the angle of the cushioning mechanism 2;

[0037] In this embodiment, the support mechanism 1 includes a base 101 and a support rod 102; the pad mechanism 2 includes a thigh pad 201 and a calf pad 202 which are rotatably connected to both sides of the top of the support rod 102; the bottom ends of the thigh pad 201 and the calf pad 202 are respectively mounted on the adjustment mechanism 3, and are driven by the adjustment mechanism 3 to rotate relative to the base 101; the support rod 102 is fixedly mounted in the middle of the base 101, supporting the top of the pad mechanism 2 and bearing part of the pressure; the top of the pad mechanism 2 is supported by the support rod 102 and rises and falls in the vertical direction, and the bottom is driven by the adjustment mechanism 3 to slide in the horizontal direction, and the sliding and lifting are coordinated to cause angle changes;

[0038] In this embodiment, the adjustment mechanism 3 includes a bevel gear set 301, a threaded rod 302, and a threaded slider 303; the adjustment mechanism 3 provides power through the meshing of the bevel gear set 301, drives the threaded rod 302 to rotate, and further drives the threaded slider 303 to slide on the base 101; the thigh pad 201 and the calf pad 202 are rotatably mounted on the adjustment mechanism 3 through the threaded slider 303; the power of the bevel gear set 301 is the power of the rotary motion, which can come from motor drive or human drive, which is a mature technology in the prior art, and technicians in the relevant technical field can select it according to actual conditions, and its purpose is to transmit the rotary driving force in the horizontal plane into the rotary motion in the vertical plane through the bevel gear set 301, so as to drive the threaded rod 302 to rotate, and further drive the threaded slider 303 to slide on the base 101;

[0039] In this embodiment, the support rod 102 is a rod member that can be telescopic in the vertical direction, and a shaft ring 103 is arranged on the top. The shaft ring 103 is a U-shaped structure, and a symmetrical rotating shaft 1031 is integrally connected to the top end extending inward; the thigh pad 201 and the calf pad 202 are both rotatably connected to the shaft ring 103 through the rotating shaft 1031; there is a gap 104 between the two rotating shafts 1031; the specific structure of the support rod 102 can select a rod member with a telescopic function and structure such as an electric push rod, a hydraulic push rod, a latch telescopic rod, etc., which is a mature technology in the prior art, and the technicians in the relevant technical field can select it as needed, and no excessive description is made in this embodiment;

[0040] In this embodiment, the thigh pad 201 and the calf pad 202 are both telescopic plates, including a lower plate 2001 at the bottom and an upper plate 2002 at the top; the telescopic structure of the upper plate 2002 and the lower plate 2001 can be in the form of inner and outer connection, or in the form of telescopic slide rail 105. In this embodiment, referring to the drawings, the lower plate 2001 is sleeved in the upper plate 2002, the top end of the upper plate 2002 is driven by the rotating shaft 1031, and the bottom end of the lower plate 2001 is driven by the threaded slider 303;

[0041] In this embodiment, a plurality of restraint belts 203 are installed on both the upper plate 202 and the lower plate 201; the restraint belts 203 include but are not limited to elastic belts, snap-on restraint belts 203, and Velcro restraint belts 203; the restraint belts 203 are mature technologies in the prior art, and their function is to restrain and fix the limbs at both ends of the joints, and will not be described in detail in this embodiment;

[0042] In this embodiment, a recessed portion 204 is formed on the top of the upper plate 2002. The width of the recessed portion 204 matches the width of the gap 104. The recessed portion 204 cooperates with the gap 104 to provide space below the joint, which is convenient for observing the joint and performing surgical operations.

[0043] In this embodiment, a foot pad 205 is fixedly connected to the lower plate 2001 of the calf pad 202, and the foot pad 205 is inclined upward; the foot pad 205 is a structure to prevent foot drop, and by cushioning the sole of the foot from below the sole, the calf muscles are relaxed, not pulled by the sole pulling force, and not tensed by actively hooking the foot;

[0044] In this embodiment, the bevel gear set 301 transmits the circular motion in the horizontal plane to the circular motion in the vertical plane.

[0045] In this embodiment, two collinear slide rails 105 are provided on both sides of the base 101, and the two threaded sliders 303 slide independently on the two slide rails 105 respectively; the slide rail 105 is a recessed structure, which is recessed downward from the upper surface of the base 101 to form a sliding rail with a straight track; the slide rail 105 is concavely formed in order to make the upper surface of the base 101 smooth, and in combination with the following rounded corner treatment of the base 101, the upper surface of the base 101 is smooth without any protruding parts, thereby ensuring the comfort of limb placement.

[0046] In this embodiment, the end surface of the base 101 close to one end of the thigh pad 201 is chamfered; the chamfering here is to enhance comfort during use. This place is easy to contact with the patient's thigh root. If it is a sharp edge structure, it will cause bumps and pressure on the patient's thigh. Therefore, it is set to a chamfered structure for practical comfort.

[0047] In this embodiment, the specific use process of a joint positioning auxiliary device for lower limb knee joint surgery is as follows:

[0048] The various components of the utility model are installed and matched as shown in the accompanying drawings and described in the above text. According to the patient's limb length and the angle of joint flexion, the support mechanism 2 of the utility model is raised to a suitable height in advance by rotating the bevel gear set 301 and controlling the extension and retraction of the support rod 102, and the thigh pad 201 and the calf pad 202 are adjusted to a suitable angle; the restraint belt 203 is opened, and the thigh and calf at both ends of the patient's knee joint are placed on the thigh pad 201 and the calf pad 202 respectively, and the height and angle of the support mechanism 2 are further fine-tuned by rotating the bevel gear foot and controlling the extension and retraction of the support rod 102, and the tightness of the restraint belt 203 is closed and adjusted, and then the limbs at both ends of the joint are fixed to complete the positioning and fixation of the joint;

[0049] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A joint positioning auxiliary device for lower limb knee joint surgery, characterized in that: include: Support mechanism, cushion mechanism, adjustment mechanism; The support mechanism includes a base and a support rod; the support mechanism includes a thigh pad and a calf pad which are rotatably connected to both sides of the top end of the support rod; the bottom ends of the thigh pad and the calf pad are respectively mounted on the adjustment mechanism, and are driven by the adjustment mechanism to rotate relative to the base; The adjusting mechanism comprises a bevel gear set, a threaded rod and a threaded slider; the adjusting mechanism provides power through the meshing of the bevel gear set to drive the threaded rod to rotate, and further drive the threaded slider to slide on the base; the thigh pad and the calf pad are rotatably mounted on the adjusting mechanism through the threaded slider.

2. A joint positioning auxiliary device for lower limb knee joint surgery according to claim 1, characterized in that: The support rod is a rod that can be extended in the vertical direction, and a shaft ring is arranged on the top. The shaft ring is a U-shaped structure, and a symmetrical rotating shaft is integrally connected to the top end extending inward; the thigh pad and the calf pad are both rotatably connected to the shaft ring through the rotating shaft; there is a gap between the two rotating shafts.

3. The joint positioning auxiliary device for lower limb knee joint surgery according to claim 1, characterized in that: The thigh pad and the calf pad are both plates with telescopic structures, including a lower plate at the bottom and an upper plate at the top.

4. A joint positioning auxiliary device for lower limb knee joint surgery according to claim 3, characterized in that: A plurality of restraint belts are installed on both the upper plate and the lower plate; the restraint belts include but are not limited to elastic belts, snap-on restraint belts, and Velcro restraint belts.

5. The joint positioning auxiliary device for lower limb knee joint surgery according to claim 3, characterized in that: The top of the upper plate is provided with a recessed portion recessed downwards.

6. The joint positioning auxiliary device for lower limb knee joint surgery according to claim 3, characterized in that: A foot pad is fixedly connected to the lower plate of the calf pad, and the foot pad is inclined upward.

7. The joint positioning auxiliary device for lower limb knee joint surgery according to claim 1, characterized in that: The bevel gear set transmits the circular motion in the horizontal plane to the circular motion in the vertical plane.

8. The joint positioning auxiliary device for lower limb knee joint surgery according to claim 1, characterized in that: Two collinear slide rails are provided on both sides of the base, and the two threaded sliders slide independently on the two slide rails respectively; the slide rail is a recessed structure, which is recessed downward from the upper surface of the base to form a slide rail with a straight track.

9. The joint positioning auxiliary device for lower limb knee joint surgery according to claim 1, characterized in that: The end surface of the base close to one end of the thigh pad is rounded.

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