Vascular irrigator for autologous internal arteriovenous fistula plasty

Abstract

The utility model relates to a blood vessel flusher for autologous internal arteriovenous fistula plasty, which is characterized by comprising a base, a driving component, a moving plate, a connecting block, a piston rod, a flushing cylinder, a T-shaped block, a sliding rail, a connecting component and the like, the rear side of the base is connected with the moving plate, the driving component is mounted on the base and used for driving the moving plate, the sliding rail is arranged on the base, and the piston rod is connected with the connecting block. A T-shaped block is slidably connected into the sliding rail, a flushing barrel is connected to the top of the T-shaped block, a piston rod is slidably connected into the flushing barrel, the rear end of the piston rod is slidably connected into a moving plate, and a connecting assembly is arranged in the moving plate and used for stabilizing connection between the piston rod and the moving plate; the detachable washing barrel has the advantages that the washing barrel body can be directly detached and cleaned through the matching among the washing barrel body, the threaded connecting ring and the detachable hoop, the influence of residual water on the use safety of equipment is solved, and the aim of detaching and installing the washing barrel body is achieved.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a vascular irrigation device for autologous arteriovenous fistula formation. Background Technology

[0002] Autogenous arteriovenous fistula (AAVF) is a medical technique that surgically connects a nearby artery and superficial vein subcutaneously, creating an artificial direct channel between the artery and vein. This technique aims to utilize the ease of puncture of superficial veins while simultaneously increasing blood flow through the artery, thus achieving the desired therapeutic effect. This surgical method is particularly suitable for patients with chronic renal failure requiring long-term hemodialysis. Compared to hemodialysis catheters, autogenous AAVFs have advantages such as a lower infection rate and no risk of catheter dislodgement and bleeding. Compared to artificial arteriovenous fistulas, autogenous AAVFs are simpler, less expensive, have a longer average lifespan, and a relatively lower probability of infection and thrombosis.

[0003] Several vascular irrigation devices for autogenous arteriovenous fistula (AVF) angioplasty are currently available on the market, among which a vascular irrigation device for this procedure, with publication number CN221845657U, has attracted significant attention. This device, through automatic control technology, can stably and efficiently irrigate blood vessels, ensuring the cleanliness and patency of the vascular lumen during the procedure. The device's design makes the irrigation process more precise and reliable, greatly improving the success rate and safety of the surgery. Its efficient performance allows surgeons to focus more on the procedure itself, reducing the surgical risks associated with improper irrigation.

[0004] The equipment's flushing drum is designed to be non-removable, which causes numerous inconveniences during cleaning and maintenance. After rinsing with running water, the drum cannot be removed and dried promptly. Residual moisture not only easily breeds bacteria but may also affect the safety of the equipment in subsequent uses. Furthermore, a prolonged humid environment can lead to corrosion and damage to internal components, further shortening the equipment's lifespan. Utility Model Content

[0005] The technical problem to be solved by this invention is the presence of residual moisture after cleaning, and it provides a detachable vascular flushing device for autologous arteriovenous fistula formation.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a vascular irrigation device for autologous arteriovenous fistula formation, comprising a base, a drive assembly, an irrigation fluid release box, a delivery tube, a control valve, a movable plate, a connecting block, a piston rod, a clamp, an irrigation cylinder, an irrigation connector assembly, a threaded connecting ring, a T-block, a slide rail, and a connecting assembly. A movable plate is connected to the rear side of the base, and a drive assembly is installed on the base to drive the movable plate. An irrigation fluid release box is connected to the drive assembly. A slide rail is provided on the base, and a T-block is slidably connected within the slide rail. The top of the T-shaped block is connected to a flushing cylinder. A flushing connector assembly is connected to the front of the flushing cylinder, and a threaded connecting ring is connected to the rear of the flushing cylinder. A control valve is installed on the flushing cylinder. One end of the delivery pipe is connected to the flushing fluid release box, and the other end is connected to the control valve. Both ends of the delivery pipe are fixed to the flushing fluid release box and the control valve by clamps. A piston rod is slidably connected inside the flushing cylinder. The piston rod is slidably connected to the threaded connecting ring, and the rear end of the piston rod is slidably connected to the moving plate. A connecting assembly is provided inside the moving plate to stabilize the connection between the piston rod and the moving plate.

[0007] A further preferred embodiment of this utility model is as follows: the connecting assembly includes an operating rod, a first return spring, a wedge block, a guide rod, a top plate, and a second return spring. The operating rod is slidably connected to the moving plate, and the bottom of the operating rod is connected to the wedge block, which is in a limiting fit with the rear end of the piston rod. The first return spring is sleeved on the operating rod, with one end connected to the moving plate and the other end connected to the wedge block. The guide rod is slidably connected inside the moving plate, and the right end of the guide rod is connected to the top plate, which is in a pressing fit with the rear end of the piston rod. The second return spring is sleeved on the guide rod, with one end connected to the moving plate and the other end connected to the top plate.

[0008] A further preferred embodiment of this utility model is: it also includes a protective pad, and a protective pad is connected to the side of the top plate that contacts the piston rod.

[0009] A further preferred embodiment of this utility model is: it also includes a magnet, the inner end of the slide rail is connected to a magnet, and the T-block is made of magnetic metal.

[0010] A further preferred embodiment of this utility model is: it also includes anti-slip pads, and a plurality of anti-slip pads are provided on the bottom of the base.

[0011] A further preferred embodiment of this utility model is: it also includes rubber strips, and multiple rubber strips are connected to the outer ring of the threaded connecting ring.

[0012] A further preferred embodiment of this utility model is: it also includes a guide block, and a guide block is connected to the notch on the right side of the movable plate, with the inclined surfaces of the guide blocks facing each other.

[0013] A further preferred embodiment of this utility model is: it also includes a rubber sleeve, and the operating lever is fitted with a rubber sleeve.

[0014] Compared with the prior art, the advantages of this utility model are: through the cooperation between the flushing cylinder, the threaded connecting ring, and the detachable clamp, the flushing cylinder can be directly disassembled and cleaned, solving the problem of residual water affecting the safety of equipment use and achieving the purpose of disassembling and installing the flushing cylinder; through the piston rod, the moving plate, and the connecting assembly, the piston rod can be stably slid and fixed, which not only ensures the airtightness during the flushing process, but also allows the piston rod to slide easily when needed and be firmly restricted in the moving plate when fixed, thus solving the problem of the inside not drying in time after being rinsed with running water and reducing the possibility of residual water. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the movable plate of this utility model.

[0018] Figure 3 This is a schematic diagram showing the connection structure of the flushing fluid release box, delivery pipe, and control valve of this utility model.

[0019] Figure 4 This is a schematic diagram of the connection structure of the guide rod, top plate, and protective pad of this utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure between the magnet and the anti-slip foot pad of this utility model.

[0021] In the diagram: 1. Base, 2. Drive assembly, 3. Fluid release box, 31. Delivery pipe, 32. Control valve, 4. Moving plate, 5. Operating lever, 6. First return spring, 7. Wedge block, 8. Connecting block, 9. Piston rod, 10. Clamp, 11. Fluid cylinder, 111. Fluid connector assembly, 12. Threaded connecting ring, 13. T-block, 14. Slide rail, 15. Guide rod, 16. Top plate, 17. Second return spring, 18. Protective pad, 19. Magnet, 20. Anti-slip pad, 21. Rubber strip, 22. Guide block, 23. Rubber sleeve. Detailed Implementation

[0022] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0023] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0024] This embodiment mainly describes the structure of the vascular irrigation device, as follows:

[0025] A vascular irrigation device for autogenous arteriovenous fistula formation, such as Figures 1-5 As shown, the system includes a base 1, a drive assembly 2, a flushing fluid release box 3, a delivery pipe 31, a control valve 32, a moving plate 4, a connecting block 8, a piston rod 9, a clamp 10, a flushing cylinder 11, a flushing connector assembly 111, a threaded connecting ring 12, a T-block 13, a slide rail 14, and a connecting component. The moving plate 4 is connected to the rear of the base 1 and has a right-facing notch. The drive assembly 2 is mounted on the base 1 and drives the moving plate 4. The drive assembly 2 mainly consists of a motor and a lead screw. The lead screw drives the moving plate 4 to maintain stable movement. The left end of the moving plate 4 is slidably connected to the housing of the drive assembly 2. The flushing fluid release box 3 is connected to the drive assembly 2. The slide rail 14 is provided on the base 1, and a T-block 13 is slidably connected inside the slide rail 14. The T-block 13 is inverted, with its crossbeam located inside the slide rail 14. The flushing cylinder 11 is connected to the top of the T-block 13, and the flushing connector assembly 111 is connected to the front of the flushing cylinder 11. The flushing connector assembly 111 is connected to the external pipeline for outputting flushing solution. A threaded connecting ring 12 is connected to the rear side of the flushing cylinder 11. A control valve 32 is installed on the flushing cylinder 11. One end of the delivery pipe 31 is connected to the flushing liquid release box 3, and the other end is connected to the control valve 32. Both ends of the delivery pipe 31 are fixed to the flushing liquid release box 3 and the control valve 32 by clamps 10. The clamps 10 are composed of annular bars and screws and nuts. When in use, they only need to be fitted onto the connection parts of the water supply pipe and other parts, and then the screws and nuts are tightened. A piston rod 9 is slidably connected inside the flushing cylinder 11. The piston rod 9 is slidably connected to the threaded connecting ring 12. The piston rod 9 and the flushing cylinder 11 are completely fitted together, with good airtightness. The rear end of the piston rod 9 is slidably connected to the moving plate 4, or more precisely, slidably connected to the notch of the moving plate 4. A connecting assembly is provided inside the moving plate 4. The connecting assembly is used to stabilize the connection between the piston rod 9 and the moving plate 4.

[0026] like Figure 2 and Figure 4As shown, the connecting assembly includes an operating lever 5, a first return spring 6, a wedge block 7, a guide rod 15, a top plate 16, and a second return spring 17. Two operating levers 5 are slidably connected to the moving plate 4. The tops of the two operating levers 5 are connected by a horizontal plate, and the bottom of the operating lever 5 is connected to a wedge block 7. The left side of the wedge block 7 is flat, and the bottom is inclined. The wedge block 7 is limited to the rear end of the piston rod 9. Each operating lever 5 is fitted with a first return spring 6. One end of the first return spring 6 is connected to the moving plate 4, and the other end is connected to the wedge block 7. A guide rod 15 is slidably connected inside the moving plate 4. The right end of the guide rod 15 is connected to the top plate 16. The top plate 16 is slidably connected to the notch in the moving plate 4. The top plate 16 is pressed to the rear end of the piston rod 9. A second return spring 17 is fitted on the guide rod 15. One end of the second return spring 17 is connected to the moving plate 4, and the other end is connected to the top plate 16.

[0027] Medical staff place the base 1 in a suitable position, fill the irrigation fluid release box 3 with solution, and then ensure that the clamp 10 is securely connected to the connection point between the delivery tube 31 and other components. The moving plate 4 is then moved to a suitable position via the drive assembly 2, providing sufficient space for the installation and disassembly of the irrigation cylinder 11 and its related components. After the irrigation connector assembly 111 is connected to other pipelines, the control valve 32 is opened, and in conjunction with the drive assembly 2, the irrigation volume is controlled to irrigate the surgical segment vein. After irrigation is complete, the drive assembly 2 and control valve 32 are closed, and the irrigation connector assembly is disengaged. Connect component 111 to other pipelines, remove clamp 10, release the piston rod 9 from the fixing through the connecting assembly, push the flushing cylinder 11, and slide the T-block 13 in the slide rail 14. Then remove the flushing connector assembly 111 and tighten the threaded connecting ring 12 to separate and clean each component. After cleaning, dry them thoroughly and then reassemble them. Align the two T-blocks 13 with the slide rail 14, align the rear end of the piston rod 9 with the notch of the moving plate, push the flushing cylinder 11, and fix the piston rod 9 through the connecting assembly, thereby restricting the left and right movement of the flushing cylinder 11 and completing the installation of the device.

[0028] When removing the flushing cylinder 11, medical staff pull the operating lever 5 upwards. The operating lever 5 causes the wedge block 7 to slide upwards and compresses the first return spring 6. When the wedge block 7 disengages from the piston rod 9, the compressed second return spring 17 rebounds, pushing the top plate 16 to the right. The top plate 16 pushes the piston rod 9 to slide along the notch of the moving plate 4. After releasing the operating lever 5, the first return spring 6 rebounds, and the wedge block 7 and the operating lever 5 move downwards. Since the flat side of the wedge block 7 does not contact the piston rod 9, but rather the inclined surface at its bottom, it cannot prevent the piston rod 9 from sliding. At this time, the flushing cylinder 11 can be easily pulled along the slide rail 14, so the flushing cylinder can be removed. When the piston rod 9 is 11, the operating lever 5 is pulled upwards, and the piston rod 9 slides and is released. When the piston rod 9 is fixed, the flushing cylinder 11 is pushed along the slide rail 14. Then, the piston rod 9 slides in the moving plate 4 as the flushing cylinder 11 is pushed. When it passes the inclined surface at the bottom of the wedge block 7, it squeezes the wedge block 7 and pushes it to slide upwards with the operating lever 5, compressing the first return spring 6. When it continues to move, it squeezes the top plate 16 and compresses the second return spring 17. When the piston rod 9 has completely passed the wedge block 7, the first return spring 6 rebounds, the wedge block 7 slides downwards, and the plane of the wedge block 7 contacts the piston rod 9, thereby restricting the sliding of the piston rod 9 and completing the restriction of the flushing cylinder 11.

[0029] like Figure 4 As shown, it also includes a protective pad 18, which is connected to the side of the top plate 16 that contacts the piston rod 9.

[0030] The protective pad 18 can buffer the force between the top plate 16 and the piston rod 9, protect the components, and extend their service life.

[0031] like Figure 5 As shown, it also includes a magnet 19, the inner end of the slide rail 14 is connected to a magnet 19, and the T-block 13 is made of magnetic metal.

[0032] When the T-block 13 slides to the end of the slide rail 14, the magnet 19 attracts the T-block 13, thereby preventing the T-block 13 from sliding along the slide rail 14 and maintaining the stability of the rinsing cylinder 11 during operation.

[0033] like Figure 1 As shown, it also includes anti-slip pads 20, and several anti-slip pads 20 are provided at the bottom of the base 1.

[0034] The base 1 will vibrate when the device is working. The anti-slip pads 20 at the bottom can stabilize the base 1 and reduce the possibility of the device sliding.

[0035] like Figure 3 As shown, it also includes rubber strips 21, and multiple rubber strips 21 are connected to the outer ring of the threaded connecting ring 12.

[0036] When the threaded connecting ring 12 is turned to separate the piston rod 9 and the flushing cylinder 11, the rubber strip 21 on the surface of the threaded connecting ring 12 can optimize the friction between the palm of the medical staff and the parts, thereby playing a role in preventing slippage.

[0037] like Figure 2 As shown, it also includes a guide block 22. The guide block 22 is connected to the notch on the right side of the movable plate 4, and the inclined surfaces of the guide block 22 are opposite each other.

[0038] When the piston rod 9 is pushed in, the piston rod 9 contacts the inclined surface of the guide block 22, pressing the guide block 22 into the moving plate 4, thereby saving the time of aligning the moving plate 4 and simplifying the working steps.

[0039] like Figure 1 As shown, it also includes a rubber sleeve 23, which is fitted onto the operating lever 5.

[0040] When the operating lever 5 is pulled, the rubber sleeve 23 can prevent the fingers from sliding against each other, thereby ensuring the stability of the working process.

[0041] First, medical staff place the base 1 in a suitable position, ensuring stable support from the anti-slip pads 20. Then, they fill the solution in the irrigation fluid release box 3 and secure the connection at both ends of the delivery tube 31 using clamps 10. Subsequently, the motor and lead screw in the drive assembly 2 drive the moving plate 4 to a suitable position, providing sufficient space for the installation and disassembly of the irrigation cylinder 11 and its related components. After the irrigation connector assembly 111 is connected to the external pipeline, the control valve 32 is opened, and the irrigation volume is controlled by the drive assembly 2 to irrigate the surgical segment vein. During irrigation, the piston rod 9 fits tightly inside the irrigation cylinder 11, forming a good airtight seal to ensure that the irrigation fluid does not leak. At the same time, the rear end of the piston rod 9 slides stably within the notch of the moving plate 4 through the action of the operating rod 5, wedge block 7, first return spring 6, guide rod 15, top plate 16, and second return spring 17 in the connecting assembly. When it is necessary to remove the irrigation cylinder 11, the medical staff pulls the operating rod 5 upward, causing the wedge block 7 to rise and compress the first return spring 6. At this point, as the limiting engagement between the wedge block 7 and the piston rod 9 is released, the second return spring 17 rebounds, pushing the top plate 16 to the right, thereby allowing the piston rod 9 to slide freely within the notch of the moving plate 4. After releasing the operating lever 5, the first return spring 6 rebounds, pushing the wedge block 7 back to its original position, with its flat portion in close contact with the piston rod 9, thus limiting the sliding of the piston rod 9 within the moving plate 4, thereby achieving stable installation and fixation of the flushing cylinder 11. In addition, the protective pad 18 is used to buffer the force between the top plate 16 and the piston rod 9, extending its service life; the magnet 19 attracts the T-shaped block 13 to the end of the slide rail 14 to prevent the flushing cylinder 11 from sliding and ensure working stability; the anti-slip foot pad 20 prevents the base 1 from sliding; the rubber strip 21 increases the friction of the threaded connecting ring 12 for easier operation; the guide block 22 simplifies the process of aligning the piston rod 9 with the moving plate 4; and the rubber sleeve 23 prevents fingers from sliding with the operating lever 5, ensuring stable operation.

[0042] The above provides a detailed description of a vascular irrigation device for autologous arteriovenous fistula formation provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A vascular irrigation device for autogenous arteriovenous fistula formation, characterized in that, The system includes a base (1), a drive assembly (2), a flushing fluid release box (3), a delivery pipe (31), a control valve (32), a moving plate (4), a connecting block (8), a piston rod (9), a clamp (10), a flushing cylinder (11), a flushing connector assembly (111), a threaded connecting ring (12), a T-block (13), a slide rail (14), and a connecting assembly. The moving plate (4) is connected to the rear side of the base (1). The drive assembly (2) is installed on the base (1) and is used to drive the moving plate (4). The flushing fluid release box (3) is connected to the drive assembly (2). The slide rail (14) is provided on the base (1). The T-block (13) is slidably connected inside the slide rail (14). The flushing cylinder (111) is connected to the top of the T-block (13). The front side of the flushing cylinder (11) is connected to the flushing connector assembly (111), and the rear side of the flushing cylinder (11) is connected to the threaded connecting ring (12). The flushing cylinder (11) is equipped with a control valve (32). One end of the delivery pipe (31) is connected to the flushing liquid release box (3), and the other end is connected to the control valve (32). Both ends of the delivery pipe (31) are fixed to the flushing liquid release box (3) and the control valve (32) by clamps (10). A piston rod (9) is slidably connected inside the flushing cylinder (11). The rear end of the piston rod (9) is slidably connected inside the moving plate (4). The piston rod (9) is slidably connected to the threaded connecting ring (12). A connecting assembly is provided inside the moving plate (4). The connecting assembly is used to stabilize the connection between the piston rod (9) and the moving plate (4).

2. The vascular irrigation device for autogenous arteriovenous fistula formation according to claim 1, characterized in that: The connecting assembly includes an operating rod (5), a first reset spring (6), a wedge block (7), a guide rod (15), a top plate (16), and a second reset spring (17). The operating rod (5) is slidably connected to the moving plate (4). The wedge block (7) is connected to the bottom of the operating rod (5). The wedge block (7) is in a limiting fit with the rear end of the piston rod (9). The first reset spring (6) is sleeved on the operating rod (5). One end of the first reset spring (6) is connected to the moving plate (4), and the other end is connected to the wedge block (7). The guide rod (15) is slidably connected inside the moving plate (4). The top plate (16) is connected to the right end of the guide rod (15). The top plate (16) is in a pressing fit with the rear end of the piston rod (9). The second reset spring (17) is sleeved on the guide rod (15). One end of the second reset spring (17) is connected to the moving plate (4), and the other end is connected to the top plate (16).

3. The vascular irrigation device for autogenous arteriovenous fistula formation according to claim 2, characterized in that: It also includes a protective pad (18), which is connected to the side of the top plate (16) that contacts the piston rod (9).

4. A vascular irrigation device for autologous arteriovenous fistula formation according to claim 3, characterized in that: It also includes a magnet (19), the inner end of the slide rail (14) is connected to a magnet (19), and the T-block (13) is made of magnetic metal.

5. A vascular irrigation device for autologous arteriovenous fistula formation according to claim 4, characterized in that: It also includes anti-slip pads (20), and the base (1) has several anti-slip pads (20) at the bottom.

6. A vascular irrigation device for autologous arteriovenous fistula formation according to claim 5, characterized in that: It also includes rubber strips (21), and the outer ring of the threaded connecting ring (12) is connected with multiple rubber strips (21).

7. A vascular irrigation device for autogenous arteriovenous fistula formation according to claim 6, characterized in that: It also includes a guide block (22), and the guide block (22) is connected to the notch on the right side of the movable plate (4), with the inclined surfaces of the guide block (22) facing each other.

8. A vascular irrigation device for autogenous arteriovenous fistula formation according to claim 7, characterized in that: It also includes a rubber sleeve (23), which is fitted onto the operating lever (5).

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