A lower extremity immobilization device for a femoral puncture patient

Abstract

The application belongs to the technical field of medical devices, and particularly relates to a lower limb braking device for femoral artery puncture patients, which comprises a hip seat, an arc-shaped accommodating groove is formed in the upper surface of the hip seat, the left end of the hip seat is a slope, two driving mechanisms are arranged on the right side surface of the hip seat, and a fixing mechanism is arranged on each driving mechanism. The electric push rod drives the translation block to move, so that the thigh supporting plate and the calf supporting plate are folded to realize continuous adjustment of the knee bending angle. Meanwhile, the worm and gear mechanism drives the rotation plate to rotate to realize accurate control of the lower limb abduction angle, so that the patient's leg is stably kept in the knee bending and abduction position and angle, the femoral triangle area is continuously and sufficiently exposed, the patient's leg is braked to avoid movement of the patient's limbs during the puncture process, treatment operation is facilitated, the medical staff do not need to manually keep the patient's body position, and the workload of the medical staff is reduced.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a lower limb immobilization device for patients undergoing femoral artery puncture. Background Technology

[0002] Femoral artery puncture is a commonly used method for establishing vascular access in clinical procedures such as cardiovascular intervention, cerebrovascular intervention, peripheral vascular intervention, and hemodialysis. During the puncture, the patient is usually required to lie supine with the lower limb on the puncture side kept in abduction, external rotation, and knee flexion to fully expand the femoral triangle area. This allows the femoral artery to be relatively fixed in position and the pulsation to be clear, facilitating accurate puncture and reducing the risk of complications such as vascular injury, hematoma, and pseudoaneurysm.

[0003] Currently, maintaining the above-mentioned position in clinical practice mainly relies on soft pillows, sandbags, restraint straps, or manual support from medical staff. This method has poor fixation reliability. During long-term operations, patients are prone to changing their position due to pain, tension, or slight movement, which affects the puncture accuracy and operation safety. Furthermore, medical staff need to continuously assist in fixing the patient's lower limbs, which is labor-intensive and may interfere with the sterile operation area. Summary of the Invention

[0004] The purpose of this invention is to provide a lower limb immobilization device for femoral artery puncture that is simple in structure, reliable in fixation, convenient in adjustment, adaptable to different leg lengths, and can precisely control the angles of knee flexion and abduction.

[0005] The specific technical solution adopted by this invention is as follows: A lower limb immobilization device for patients undergoing femoral artery puncture includes a hip seat, an arc-shaped receiving groove on the upper surface of the hip seat, and a slope at the left end of the hip seat. Two drive mechanisms are provided on the right side of the hip seat, and each drive mechanism is provided with a fixing mechanism. Each of the drive mechanisms includes a mounting plate, the left side of which is fixedly connected to the right side of the seat. A rotating plate is fitted inside the mounting plate. The left and right sides of the rotating plate are fixedly connected to the opposite ends of two support shafts. The two support shafts are rotatably connected to the left and right side plates of the mounting plate through bearings. A mounting groove is provided on the right side of the upper surface of the rotating plate. A translation block is slidably arranged in the mounting groove. The upper surface of the translation block is rotatably connected to the bottom end of a fixed block through a hinge seat. The left end of the upper surface of the mounting plate is rotatably connected to the bottom end of a fixed block through a hinge seat. Each of the aforementioned fixing mechanisms includes a thigh support plate and a calf support plate. The left end of the bottom surface of the thigh support plate is fixedly connected to the top end of the second fixing block, and the right end of the bottom surface of the calf support plate is fixedly connected to the top end of the first fixing block. A connecting groove is provided on the right end of the thigh support plate, and sliding grooves are provided on both the front and rear sides of the connecting groove. A slider is slidably disposed in each sliding groove. The two sliders are fixedly connected to both ends of a rotating shaft, and the rotating shaft is rotatably connected to the left end of the calf support plate through a bearing.

[0006] Furthermore, a worm gear is fixedly installed at the right end of the support shaft on the right side, and the worm gear is meshed with a worm. Both the worm gear and the worm are installed inside the fixed box.

[0007] Furthermore, the left side of the fixing box is fixedly connected to the right side of the mounting plate, and the two ends of the worm gear are rotatably connected to the front and rear sides of the fixing box through bearings, respectively. A handwheel is fixedly installed at one end of the worm gear.

[0008] Furthermore, the translation block has two sleeve holes, and the two sleeve holes are respectively fitted onto the two guide rods, and the two ends of the two guide rods are respectively fixedly connected to the left and right ends of the mounting groove.

[0009] Furthermore, the middle of the left side of the translation block is fixedly connected to the right end of the electric push rod, and the left end of the electric push rod is fixedly connected to the inner left side of the mounting groove.

[0010] Furthermore, connecting plates are provided on both the front and rear sides of the connecting groove, and the bottom surfaces of the two connecting plates are fixedly connected to the upper surface of the thigh support plate. Each connecting plate is provided with a set of limiting holes arranged in the horizontal direction.

[0011] Furthermore, two of the two sets of limiting holes are respectively inserted into the opposite ends of the two limiting rods, and the opposite ends of the two limiting rods are respectively inserted into the two limiting holes. The two limiting holes are respectively opened on the upper side of the two sliders.

[0012] Furthermore, the two sliders are respectively opened in the two grooves, and the two grooves are both opened on the upper surface of the thigh support plate, and the bottom ends of the two grooves are respectively connected through the two grooves.

[0013] Furthermore, the bottom surfaces of the two sliders are respectively fixedly connected to the upper surfaces of the two sliders.

[0014] Furthermore, the upper surfaces of the buttock seat, thigh support, and calf support are all provided with leather-faced sponge pads. The upper surfaces of the thigh support and calf support are each fixedly provided with two straps, and each strap has a Velcro closure at both ends for securing the ends of the straps together.

[0015] The technical effects achieved by this invention are as follows: This invention utilizes an arc-shaped receiving groove on the upper surface of the buttock seat to conform to the patient's hip and waist via a left-end ramp, reducing body slippage and improving supine positioning stability. Simultaneously, two drive mechanisms and a fixing mechanism connected to the buttock seat provide independent adjustment for the left and right lower limbs, respectively. An electric push rod drives a translation block to fold the thigh and calf support plates, allowing for continuous adjustment of the knee flexion angle. A worm gear mechanism drives a rotating plate to precisely control the lower limb abduction angle, thus ensuring the patient's legs remain stably flexed and abducted, maintaining full exposure of the femoral triangle area. Furthermore, it brakes the patient's legs to prevent limb movement during puncture, facilitating treatment without requiring manual patient positioning by medical staff, reducing their workload.

[0016] This invention comprises a sliding groove 1, a sliding groove 2, a slider, a connecting plate, a limiting hole, and a limiting rod, forming an overall length adjustment and locking mechanism for the thigh and calf support plates. This mechanism aligns the rotating shaft with the patient's knee joint, accommodating patients with different leg lengths. It ensures that the electric push rod, when retracted, can rotate the patient's leg along the knee joint to perform knee flexion. Simultaneously, leather-surfaced sponge pads and straps are provided on the thigh and calf support plates to improve patient comfort and facilitate cleaning and disinfection. Quick fixation with Velcro straps effectively connects and secures the patient's leg to the thigh and calf support plates. The driving and fixing mechanisms then drive the leg on the puncture side to perform knee flexion and abduction movements, while the fixing and driving mechanisms on the other side achieve braking and fixation of the other leg. The overall structure is simple and easy to operate, reducing the workload of medical staff, improving puncture success rate and operational safety, and is suitable for clinical application. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a front view schematic diagram of the driving mechanism in this invention; Figure 3 This is a cross-sectional view of the driving mechanism in this invention; Figure 4 This is a schematic diagram of the fixing mechanism in this invention; Figure 5 This is a schematic diagram of the connecting groove in this invention; Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0018] The attached diagram lists the components represented by each number as follows: 1. Hip seat; 2. Drive mechanism; 21. Mounting plate; 22. Rotating plate; 23. Electric push rod; 24. Worm gear; 25. Fixing box; 26. Fixing block one; 27. Guide rod; 28. Mounting groove; 29. ​​Fixing block two; 210. Translation block; 211. Worm gear; 212. Support shaft; 3. Fixing mechanism; 31. Thigh support plate; 32. Strap; 33. Connecting groove; 34. Slide groove one; 35. Lower leg support plate; 36. Connecting plate; 37. Limiting hole one; 38. Rotating shaft; 39. Slider one; 310. Slide groove two; 311. Limiting hole two; 312. Slider two. Detailed Implementation

[0019] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0020] like Figure 1-6 As shown, a lower limb immobilization device for patients undergoing femoral artery puncture includes a hip seat 1. The upper surface of the hip seat 1 is provided with an arc-shaped receiving groove, and the left end of the hip seat 1 is a slope. The arc-shaped receiving groove matches the curve of the human hip and waist, and the left end of the hip seat 1 is a slope, which can provide transitional support for the patient's lower back and avoid local pressure on the waist caused by the edge of the hip seat 1. Two drive mechanisms 2 are provided on the right side of the hip seat 1, and each drive mechanism 2 is provided with a fixing mechanism 3. Each drive mechanism 2 includes a mounting plate 21. The left side of the mounting plate 21 is fixedly connected to the right side of the seat 1. A rotating plate 22 is fitted inside the mounting plate 21. The left and right sides of the rotating plate 22 are fixedly connected to the opposite ends of two support shafts 212, respectively. The two support shafts 212 are rotatably connected to the left and right side plates of the mounting plate 21 via bearings, so that the rotating plate 22 can rotate relative to the mounting plate 21 around the axis of the support shafts 212. A mounting groove 28 is provided on the right side of the upper surface of the rotating plate 22. A translation block 210 is slidably arranged in the mounting groove 28. The upper surface of the translation block 210 is rotatably connected to the bottom end of the fixed block 26 via a hinge seat. The left end of the upper surface of the mounting plate 21 is connected to the fixed block via a hinge seat. When adjusting the knee flexion of the lower limb requiring puncture, the medical staff controls the retraction of the electric push rod 23 on that side. The electric push rod 23 drives the corresponding translation block 210 to move to the left along the guide rod 27. The translation block 210 drives the right end of the lower leg support plate 35 to move to the left through the fixing block 26. Since the fixing block 29 is hinged on the mounting plate 21, and the thigh support plate 31 and the lower leg support plate 35 are rotatably connected through the pivot 38, the thigh support plate 31 and the lower leg support plate 35 will rotate and fold around the pivot 38 and the hinge seats at the fixing block 26 and the fixing block 29, so that the patient's knee joint on that side gradually bends. When the knee flexion angle reaches the appropriate degree, the retraction of the electric push rod 23 stops. Each fixing mechanism 3 includes a thigh support plate 31 and a calf support plate 35. The left end of the bottom surface of the thigh support plate 31 is fixedly connected to the top of the second fixing block 29, and the right end of the bottom surface of the calf support plate 35 is fixedly connected to the top of the first fixing block 26. A connecting groove 33 is provided on the right end of the thigh support plate 31. Sliding grooves 34 are provided on both the front and rear sides of the connecting groove 33. A slider 39 is slidably arranged in each sliding groove 34. The two sliders 39 are fixedly connected to both ends of the rotating shaft 38. The rotating shaft 38 is rotatably connected to the left end of the calf support plate 35 through a bearing. The calf support plate 35 and the thigh support plate 31 are connected by setting up sliders 39, sliding grooves 34 and rotating shaft 38, so that the thigh support plate 31 and the calf support plate 35 can rotate and fold at the rotating shaft 38, thereby driving the patient's leg to perform knee flexion. During operation, the knee is flexed first and then abducted, which conforms to the human leg movement law. It can increase the abduction angle while reducing hip joint traction and improving patient comfort.

[0021] A worm gear 211 is fixedly installed at the right end of the right support shaft 212. The worm gear 211 is meshed with a worm 24. Both the worm gear 211 and the worm 24 are located inside the fixed box 25.

[0022] The left side of the fixing box 25 is fixedly connected to the right side of the mounting plate 21. The two ends of the worm gear 24 are rotatably connected to the front and rear sides of the fixing box 25 via bearings. A handwheel is fixedly installed at one end of the worm gear 24. By rotating the handwheel, the worm gear 24 drives the worm wheel 211 to rotate. The worm wheel 211 drives the right support shaft 212 and the rotating plate 22 to rotate synchronously, thereby driving the fixing mechanism 3 to rotate around the support shaft 212, realizing the abduction movement of the lower limbs. Because the worm wheel 211 and worm gear 24 have a self-locking characteristic, that is, only the worm gear 24 can drive the worm wheel 211, and the worm wheel 211 cannot drive the worm gear 24 in the opposite direction, thus the abduction angle can be stably maintained.

[0023] The translation block 210 has two sleeve holes, which are respectively fitted onto two guide rods 27. The two ends of the two guide rods 27 are respectively fixedly connected to the left and right ends of the mounting groove 28. By having sleeve holes on the translation block 210 to fit the guide rods 27, the connection between the sleeve holes and the guide rods 27 is used to further fix and support the translation block 210, thereby further improving the translation stability of the translation block 210.

[0024] The middle of the left side of the translation block 210 is fixedly connected to the right end of the electric push rod 23, and the left end of the electric push rod 23 is fixedly connected to the left inner wall of the mounting groove 28. Through the extension and retraction of the electric push rod 23, the translation block 210 can be driven to slide back and forth along the guide rod 27.

[0025] Connecting plates 36 are provided on both the front and rear sides of the connecting groove 33. The bottom surfaces of the two connecting plates 36 are fixedly connected to the upper surface of the thigh support plate 31. Each connecting plate 36 has a set of limiting holes 37 arranged in the horizontal direction.

[0026] Two of the two sets of limiting holes 37 are respectively inserted into the opposite ends of the two limiting rods. The opposite ends of the two limiting rods are respectively inserted into the two limiting holes 311. The two limiting holes 311 are respectively opened on the upper side of the two sliders 312. Through the insertion and cooperation of the limiting rods, limiting holes 37 and limiting holes 311, the position of the rotating shaft 38 can be locked, thereby fixing the relative position of the thigh support plate 31 and the calf support plate 35.

[0027] Two sliders 312 are respectively opened in two slide grooves 310. Both slide grooves 310 are opened on the upper surface of the thigh support plate 31, and the bottom ends of the two slide grooves 310 are respectively connected to the two slide grooves 34.

[0028] The bottom surfaces of the two sliders 312 are fixedly connected to the upper surfaces of the two sliders 39. By setting the sliders 312 on the sliders 39 and sliding the sliders 312 in the grooves 310, the sliding grooves 310 and the sliders 312 are used to restrict the displacement of the sliders 39 and the lower leg support plate 35 in the front-back direction, thereby preventing the sliders 39 from disengaging from the grooves 34 and causing the lower leg support plate 35 to separate from the thigh support plate 31.

[0029] The upper surfaces of the buttock seat 1, thigh support plate 31, and calf support plate 35 are all equipped with leather-faced sponge pads. The leather-faced sponge pads can be made of medical polyurethane leather wrapped with memory foam, which has the characteristics of being waterproof, stain-resistant, easy to clean and disinfect, and can improve patient comfort and reduce the risk of pressure sores caused by prolonged immobilization. Two straps 32 are fixedly installed on the upper surfaces of the thigh support plate 31 and the calf support plate 35, and each strap 32 has a Velcro closure at both ends for fastening the ends of the straps 32, thereby stably binding the patient's thigh and calf to the thigh support plate 31 and the calf support plate 35 respectively.

[0030] The working principle of this invention is as follows: When performing femoral artery puncture treatment and using this device to assist in immobilizing the patient's leg, medical staff can first place this device on the treatment bed surface, then instruct the patient to lie flat on the treatment bed, with the waist and buttocks placed on the buttock seat 1, the groin of the thighs located at the left end of the thigh support plate 31, and both thighs and calves placed on the thigh support plate 31 and calves support plate 35 respectively. Then, the medical staff adjusts the position of the rotating shaft 38 according to the length of the patient's legs. At this time, the medical staff can pull out the limiting rods on both sides from the limiting hole 1 37 and the limiting hole 2 311, and then push the calves support plate 35 so that the slider 1 39 and the slider 2 312 slide along the sliding groove 1 34 and the sliding groove 2 310 respectively. When the rotating shaft 38 moves to correspond to the patient's knee joint, the limiting rods are reinserted into the corresponding limiting hole 1 37 and the limiting hole 2 311. Then, the patient's thighs and calves are bound to the thigh support plate 31 and the calves support plate 35 respectively using the straps 32. Then, the medical staff controls the electric push rod 23 corresponding to the leg to be punctured to retract. At this time, the electric push rod 23 drives the corresponding translation block 210 to move to the left, so that the thigh support plate 31 and the calf support plate 35 rotate and fold along the hinge seat at the pivot 38 and the fixing block 1 26 and the fixing block 29, thereby causing the patient's leg to be punctured to flex at the knee. When the patient's leg is bent to the appropriate degree, the electric push rod 23 retraction stops. Subsequently, the medical staff twists the worm gear 24 on the corresponding side, using the worm wheel 211 to drive the support shaft 212, the rotating plate 22 and the fixing mechanism 3 to rotate along the support shaft 212. At this time, the patient's leg to be punctured rotates along the hip joint, so that the patient's leg to be punctured performs an abduction action, thereby exposing the femoral triangle area. When the patient's leg is abducted to the appropriate degree, the rotation of the worm gear 24 stops, and then the puncture operation can be performed.

[0031] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A lower limb immobilization device for patients undergoing femoral artery puncture, comprising a buttock seat (1), wherein an arc-shaped receiving groove is formed on the upper surface of the buttock seat (1), and the left end of the buttock seat (1) is a slope, characterized in that: Two drive mechanisms (2) are provided on the right side of the buttock seat (1), and each drive mechanism (2) is provided with a fixing mechanism (3). Each of the drive mechanisms (2) includes a mounting plate (21), the left side of which is fixedly connected to the right side of the butt seat (1), a rotating plate (22) is fitted inside the mounting plate (21), the left and right sides of the rotating plate (22) are fixedly connected to the opposite ends of two support shafts (212), the two support shafts (212) are rotatably connected to the left and right side plates of the mounting plate (21) through bearings, a mounting groove (28) is provided on the right side of the upper surface of the rotating plate (22), a translation block (210) is slidably arranged in the mounting groove (28), the upper surface of the translation block (210) is rotatably connected to the bottom end of the first fixed block (26) through a hinge seat, and the left end of the upper surface of the mounting plate (21) is rotatably connected to the bottom end of the second fixed block (29) through a hinge seat; Each of the fixing mechanisms (3) includes a thigh support plate (31) and a calf support plate (35). The left end of the bottom surface of the thigh support plate (31) is fixedly connected to the top of the second fixing block (29). The right end of the bottom surface of the calf support plate (35) is fixedly connected to the top of the first fixing block (26). A connecting groove (33) is provided on the right end of the thigh support plate (31). A sliding groove (34) is provided on both the front and rear sides of the connecting groove (33). A slider (39) is slidably arranged in each sliding groove (34). The two sliders (39) are fixedly connected to the two ends of the rotating shaft (38). The rotating shaft (38) is rotatably connected to the left end of the calf support plate (35) through a bearing.

2. The lower limb immobilization device for patients undergoing femoral artery puncture according to claim 1, characterized in that: A worm gear (211) is fixedly installed at the right end of the support shaft (212) on the right side. The worm gear (211) is meshed with a worm (24). Both the worm gear (211) and the worm (24) are installed inside the fixed box (25).

3. A lower limb immobilization device for patients undergoing femoral artery puncture according to claim 2, characterized in that: The left side of the fixed box (25) is fixedly connected to the right side of the mounting plate (21). The two ends of the worm gear (24) are rotatably connected to the front and rear sides of the fixed box (25) through bearings. A handwheel is fixedly installed at one end of the worm gear (24).

4. A lower limb immobilization device for patients undergoing femoral artery puncture according to claim 1, characterized in that: The translation block (210) has two sleeve holes, and the two sleeve holes are respectively fitted onto the two guide rods (27). The two ends of the two guide rods (27) are respectively fixedly connected to the left and right ends of the mounting groove (28).

5. A lower limb immobilization device for patients undergoing femoral artery puncture according to claim 4, characterized in that: The middle of the left side of the translation block (210) is fixedly connected to the right end of the electric push rod (23), and the left end of the electric push rod (23) is fixedly connected to the left inner wall of the mounting groove (28).

6. A lower limb immobilization device for patients undergoing femoral artery puncture according to claim 1, characterized in that: Connecting plates (36) are provided on both the front and rear sides of the connecting groove (33). The bottom surfaces of the two connecting plates (36) are fixedly connected to the upper surface of the thigh support plate (31). Each connecting plate (36) has a set of limiting holes (37) arranged in the horizontal direction.

7. A lower limb immobilization device for patients undergoing femoral artery puncture according to claim 6, characterized in that: Two of the two sets of limiting holes (37) are respectively inserted into the opposite ends of the two limiting rods, and the opposite ends of the two limiting rods are respectively inserted into the two limiting holes (311). The two limiting holes (311) are respectively opened on the upper side of the two sliders (312).

8. A lower limb immobilization device for patients undergoing femoral artery puncture according to claim 7, characterized in that: The two sliders (312) are respectively opened in the two grooves (310). The two grooves (310) are both opened on the upper surface of the thigh support plate (31), and the bottom ends of the two grooves (310) are respectively connected to the two grooves (34).

9. A lower limb immobilization device for patients undergoing femoral artery puncture according to claim 8, characterized in that: The bottom surfaces of the two sliders (312) are fixedly connected to the upper surfaces of the two sliders (39).

10. A lower limb immobilization device for patients undergoing femoral artery puncture according to claim 1, characterized in that: The upper surfaces of the buttock seat (1), thigh support plate (31) and calf support plate (35) are all provided with leather sponge pads. The upper surfaces of the thigh support plate (31) and calf support plate (35) are each fixedly provided with two straps (32), and each strap (32) is provided with a Velcro closure at both ends to achieve the end-to-end bonding and fixing of the straps (32).

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