An artificial autologous arteriovenous fistula model

Abstract

The present application belongs to the technical field of medical devices, and relates to a simulation autologous arteriovenous fistula model, in particular to a simulation autologous arteriovenous fistula model which can demonstrate the anastomosis effect of blood vessels after fistula surgery and simulate the tremor and pulsation of the fistula. The simulation autologous arteriovenous fistula model is composed of a simulation arm fetus, simulation arterial blood vessels and simulation venous blood vessels fixed on the simulation arm fetus, simulation skin close to the outside of the simulation arm fetus, a groove and a vibration module. The vibration module is composed of an electric motor, a control circuit, a controller, a control key and a display lamp, and is used for simulating different vibration modes. The simulation autologous arteriovenous fistula model can present the anastomosis effect of blood vessels after fistula surgery, and has the functions of simulating the tremor and pulsation of the fistula, which helps patients to understand the fistula and master the fistula evaluation method, and at the same time, helps to improve the work efficiency of medical staff, reduce the work load and enrich the mode of health education.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology and relates to a simulated autogenous arteriovenous fistula model, particularly a simulated autogenous arteriovenous fistula model that can demonstrate the effect of vascular anastomosis after fistula surgery and simulate fistula tremors and pulsations. Background Technology

[0002] Clinical practice shows that the establishment and maintenance of effective vascular access is a prerequisite for the smooth progress of hemodialysis, and is known as the "lifeline" for dialysis patients. Among current technologies, autogenous arteriovenous fistulas (AVFs) are generally created by anastomosing a wrist artery and vein to establish vascular access, and are the most frequently used vascular access method for hemodialysis patients. For patients undergoing autogenous AVF surgery, systematic health education from medical staff is usually necessary to help them understand how to manage the surgery and maintain the fistula. Currently, health education for fistula patients often relies on printed materials, which patients often lack a direct understanding of. For example, during fistula function assessment, patients need to be taught to identify the "tremor" and "pulsation" that indicate good fistula function, but patients often struggle to understand verbal simulations of "cat's breath" or "running water," requiring considerable time and effort from medical staff, and even then, often proving ineffective. Currently, there are no commercially available simulated arteriovenous fistula (AVF) models specifically designed for patient health education to facilitate experiential assessment of AVF function. Therefore, there is an urgent need for a simulation model, especially an AVF simulation model, that can not only display the appearance of the AVF but also simulate its thrill and pulsation. This would provide patients scheduled for autogenous AVF surgery and their caregivers with a visual and tactile experiential health education, promoting their understanding of AVF-related content and mastering AVF assessment methods, thereby enabling timely detection of AVF complications and ultimately protecting vascular resources. Simultaneously, the simulation model can improve the work efficiency of medical staff and reduce their workload.

[0003] Based on the current state of the technology, the inventors of this application intend to provide a simulated autogenous arteriovenous fistula model, particularly a simulated autogenous arteriovenous fistula model that can demonstrate the vascular anastomosis effect after fistula surgery and simulate fistula thrill and pulsation. Summary of the Invention

[0004] The purpose of this invention is to provide a simulated autogenous arteriovenous fistula model based on the current state of the technology. This simulation model can demonstrate the fistula surgery process. In addition, through an internal vibration module, the simulation model can simulate the "tremor" and "pulsation" functions of the fistula, thereby helping to provide experiential health education for patients and caregivers.

[0005] The present invention provides a simulated autologous arteriovenous fistula model, including a simulated arm body 1, simulated arteries 3 and simulated veins fixed on the simulated arm body, simulated skin 2 closely attached to the outside of the simulated arm body, grooves and vibration modules.

[0006] In this invention, the simulated arm body is made of PVC material, and simulated arterial blood vessels 3 and simulated vein blood vessels are fixed on its surface; the surface of the simulated arm body is provided with anastomosis groove 13 and physiological state groove 14, the two grooves of anastomosis groove and physiological state groove have the same length and the inner diameter of each groove is the same as the diameter of the simulated vein blood vessel.

[0007] In this invention, the simulated blood vessels are all made of rubber tubing. Each simulated blood vessel consists of three segments: a simulated artery (3), a proximal simulated vein (5), and a distal simulated vein (4). The simulated artery is shown in red, and the simulated vein in blue. The upper segments of the simulated artery, distal simulated vein, and proximal simulated vein are fixed to the surface of the simulated arm. The lower segment of the proximal simulated vein is not fixed and can be adjusted using anastomosis grooves or physiological grooves on the surface of the arm. Specifically, placing the lower segment of the proximal simulated vein in the physiological groove ensures that the connection between the proximal and distal segments represents the normal physiological state of the blood vessel. Placing the lower segment of the proximal simulated vein in the anastomosis groove creates a post-arteriovenous fistula anastomosis effect when the proximal and arterial segments connect.

[0008] In this invention, the simulated skin 2 is made of elastic silicone material. The simulated skin has a double-door opening structure above the three simulated blood vessels, and the other simulated skin completely covers the simulated arm body.

[0009] The simulated skin's double-door opening structure is used to demonstrate the surgical field of view when the simulated skin is open, and to demonstrate the normal physiological state or post-arteriovenous fistula surgery when the simulated skin is closed and it wraps around the simulated blood vessels.

[0010] In this invention, the vibration module includes an electric motor 7, a control circuit 8, a controller 9, a control key 10, and an indicator light 11; wherein the electric motor is located deep within the simulated artery; through the switching action of the control key, the electric motor can simulate three modes: "pulsation", "tremor", and "tremor + pulsation", and the indicator light displays different colors according to the mode.

[0011] In this invention, the above-mentioned vibration module circuit structure is a circuit structure used in medical devices that is known to those skilled in the art.

[0012] The simulated autogenous arteriovenous fistula model of this invention has been tested. The results show that, through the three simulated blood vessels, the normal physiological state of the blood vessels and the postoperative vascular anastomosis effect can be effectively simulated, clearly demonstrating the appearance of the arteriovenous fistula, which helps to provide visual educational content for patients and their caregivers. Through the vibration module, three modes of "pulsation", "tremor" and "tremor + pulsation" are simulated respectively. By touching the simulated skin, a tactile and experiential form of health education is provided for patients and their caregivers, effectively promoting patients' understanding of fistulas and mastering the methods of fistula assessment, thereby protecting vascular resources. At the same time, the simulation model significantly improves the work efficiency of medical staff and reduces their workload. Attached Figure Description

[0013] Figure 1 Schematic diagram of the external surface structure of a simulated autogenous arteriovenous fistula model.

[0014] The components include: 1. Simulated arm / fetal body; 2. Simulated skin; 3. Simulated artery; 4. Simulated distal vein; 5. Simulated proximal vein; 6. Side hole; 10. Control key; 11. Indicator light; 12. Power interface; 13. Anastomosis groove; 14. Physiological state groove.

[0015] Figure 2 Schematic diagram of the vibration module circuit structure.

[0016] The components are: 7. Electric motor; 8. Control circuit; 9. Controller; 10. Control key; 11. Indicator light; 12. Power interface. Detailed Implementation

[0017] Example 1: Preparation of a simulated autologous arteriovenous fistula model

[0018] The simulated arm body was made of PVC material, the simulated blood vessels were made of rubber tubing, and the simulated skin was made of elastic silicone material.

[0019] like Figure 1 As shown, the upper part of the simulated artery 3, the distal end of the simulated vein 4, and the proximal end of the simulated vein 5 are fixed on the simulated arm body 1, while the lower part of the proximal end of the simulated vein 5 is not fixed.

[0020] like Figure 1 As shown in the figure, the simulated arm fetus 1 is provided with a physiological state groove 14 and anastomosis groove 13;

[0021] When the lower segment of the proximal end 5 of the simulated vein is placed in the physiological state groove 14, and the proximal end 5 of the simulated vein is connected to the distal end 4 of the simulated vein, it represents the normal physiological state of the blood vessel. When the lower segment of the proximal end 5 of the simulated vein is placed in the anastomosis groove 13, and the proximal end 5 of the simulated vein is connected to the side hole 6 on the simulated artery, it represents the vascular anastomosis effect after arteriovenous fistula surgery.

[0022] like Figure 1 As shown, the simulated skin 2 has a double-door opening structure above the three simulated blood vessels (3, 4, 5), and the other simulated skin 2 completely covers the simulated arm body 1;

[0023] The double-door opening structure of the simulated skin 2 is used to demonstrate the surgical field exposure state when the simulated skin 2 is open, and to demonstrate the normal physiological state or the postoperative state of the arteriovenous fistula when the simulated skin 2 is closed and it wraps around the simulated blood vessels.

[0024] like Figure 1 , Figure 2 As shown, the vibration module comprises an electric motor 7, a control circuit 8, a controller 9, control keys 10, an indicator light 11, and a power interface 12. The power interface 12 adopts a Type-C USB interface, which can be easily connected to an external power source, such as a charger or power bank, to provide power support for the vibration module.

[0025] The controller 9 is an integrated electronic chip, the core of the vibration module, used to generate the logic required by the electric motor 7; the control circuit 8 is used to drive the electric motor 7, which is a miniature flat motor placed deep in the simulated artery 3, and works under the action of the controller 9 and the control circuit 8; through the switching action of the control key 10, the electric motor 7 can simulate three modes: "pulsation", "tremor" and "tremor + pulsation", and the indicator light 11 displays different colors according to the mode; by touching the simulated skin 2, the patient can feel the "pulsation" of the physiological artery, the simple "tremor", and the "tremor + pulsation" of the autogenous arteriovenous fistula.

[0026] This invention has been tested, and the results show that this simulated autogenous arteriovenous fistula model can not only present the postoperative vascular anastomosis effect of the fistula, but also simulate the thrill and pulsation of the fistula. For patients and their caregivers, this experiential health education through visual and tactile means helps them understand fistulas, master fistula assessment methods, and protect limited vascular resources. Simultaneously, for medical staff, this simulation model can significantly improve their work efficiency, reduce their workload, enrich health education methods, and enhance specialized nursing care.

Claims

1. A simulated autogenous arteriovenous fistula model, characterized in that, It consists of a simulated arm body (1), simulated arteries (3) and simulated veins fixed on the simulated arm body, simulated skin (2) closely attached to the outside of the simulated arm body, grooves and vibration modules; The simulated arm fetus (1) in the model is provided with a physiological state groove (14) and anastomosis groove (13) on its surface. The physiological state groove and the anastomosis groove have the same length and the inner diameter is the same as the diameter of the simulated vein. The simulated blood vessels in the model consist of three segments: a simulated artery (3), a simulated proximal vein (5), and a simulated distal vein (4). The simulated artery is set in red, and the simulated vein is set in blue. The upper segments of the simulated artery, the distal vein, and the proximal vein are fixed on the surface of the simulated arm fetus. The lower segment of the proximal vein is not fixed. The lower segment of the proximal vein is placed in the physiological state groove so that when the proximal vein and the distal vein are connected, it is in the normal physiological state of the blood vessel. The lower segment of the proximal vein is placed in the anastomosis groove so that when the proximal vein and the simulated artery are connected, it presents the vascular anastomosis effect after arteriovenous fistula surgery. The simulated skin (2) in the model is provided with a double-door opening structure above the simulated blood vessels, so that the simulated skin can be opened or closed; The vibration module in the model consists of an electric motor (7), a control circuit (8), a controller (9), a control key (10), an indicator light (11), and a power interface (12). The electric motor is placed deep within the simulated artery. Through the switching action of the control key, the electric motor can simulate three modes: "pulsation", "tremor" and "tremor + pulsation". At the same time, the indicator light displays different colors according to the mode.

2. The simulated autologous arteriovenous fistula model according to claim 1, characterized in that, The simulated arteries and veins are all made of rubber tubing.

3. The simulated autologous arteriovenous fistula model according to claim 1, characterized in that, The simulated skin (2) is made of elastic silicone material.

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