Intelligent venipuncture training device

Abstract

The utility model discloses an intelligent venipuncture training device which comprises an arm model, the surface of the arm model is sleeved with simulation skin, a simulation blood vessel is arranged on the arm model, puncture areas are arranged on the elbow and the wrist of the simulation blood vessel respectively, and a temperature adjusting area is arranged at the tail end of the arm model. Through cooperative use of the arm model, the simulated skin, the simulated blood vessel, the first Peltier element and the vibrator, dynamic adjustment of the diameter and elasticity of the simulated blood vessel can be realized, blood vessel characteristics of children, old people and in a pathological state can be accurately simulated, a highly simulated operation environment is provided for students, and the training efficiency is improved. Trainees can be familiar with puncture difficulties of different types of patients in simulation, and the clinical puncture success rate in a complex environment is improved; complex clinical scenes can be simulated, medical staff can be helped to master puncture skills dealing with different conditions in training, and the number of trial and error times in actual operation is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an intelligent intravenous puncture training device. Background Technology

[0002] Venipuncture is one of the most basic and frequently performed procedures in clinical diagnosis and treatment, and is widely used in scenarios such as blood collection, infusion, and blood transfusion.

[0003] The teaching and training of venipuncture has always been highly valued. In recent years, arm models for practicing venipuncture have emerged in large numbers. For example, the existing patent document with publication number CN218100511U discloses a simulation model for venipuncture training. By setting up a chassis, a constant pressure infusion device is installed inside the chassis. The simulated vein is connected to the constant pressure infusion device only through an interface. Then, a lid is used to cover the simulated hand, so that the chassis and lid form a carrying case. With the handle, the carrying case can be lifted or lowered, making it easy to carry the simulated hand and the constant pressure infusion device, improving convenience. By setting up an adjustment device, multiple layers of light-colored honeycomb sheets are used to represent subcutaneous fat. By moving the position of the light-colored honeycomb sheets, they can overlap or disperse to simulate subcutaneous fat of different thicknesses, thereby conducting puncture training for different degrees of obesity and achieving better training results.

[0004] While the above methods can solve the corresponding technical problems, the blood vessels in the model only have one shape, while the blood vessels of different patient groups in clinical practice have different characteristics. For example, children's blood vessels have smaller diameters and thinner walls, the skin of the elderly is loose and their blood vessels are more fragile and prone to rupture, the blood vessels of obese patients are usually covered by fat tissue and are located deeper, and the blood vessels of patients in shock or with low blood pressure are constricted, making puncture difficult.

[0005] Therefore, existing arm models are insufficient to meet the needs of advanced training interns or new nurses in improving their intravenous puncture skills. More targeted and intelligent arm models need to be developed to simulate the diverse peripheral veins encountered in clinical settings in order to improve training effectiveness.

[0006] To address this, an intelligent device for training intravenous puncture is proposed. Utility Model Content

[0007] The purpose of this invention is to provide an intelligent intravenous puncture training device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] An intelligent intravenous puncture training device includes:

[0010] An arm model has simulated skin on its surface, simulated blood vessels on its arm model, puncture areas at the elbow and wrist of the simulated blood vessels, and a temperature-regulating area at the tip of the arm model.

[0011] The arm model includes a model body, a first gel layer is fixedly connected to the surface of the model body, and a first Peltier element and a vibrator are installed vertically inside the model body, with the cooling surface of the first Peltier element in contact with the top of the inner cavity of the model body.

[0012] The simulated skin includes a skin layer made of latex that is fitted onto the surface of the model body. A second gel layer is fixedly connected to the inner wall of the skin layer. The inner wall of the second gel layer is in contact with the outer surface of the first gel layer. The simulated blood vessels are located between the first gel layer and the second gel layer.

[0013] As a preferred technical solution, both the first gel layer and the second gel layer are made of thermosensitive hydrogel. A second Peltier element is embedded on the surface of the model body and at the puncture area. At least two second Peltier elements are arranged sequentially along the blood delivery direction. The cooling surface of one second Peltier element is in contact with the first gel layer, and the heating surface of the other second Peltier element is in contact with the first gel layer.

[0014] As a preferred technical solution, pressure sensing arrays are embedded in both the first gel layer and the second gel layer.

[0015] As a preferred technical solution, the simulated blood vessel includes a liquid guide tube connected to an external blood supply device. The end of the liquid guide tube away from the external blood supply device is connected to a first branch tube and a second branch tube, both of which are located on the first gel layer.

[0016] As a preferred technical solution, the simulated blood vessel also includes an air guide tube connected to an external pneumatic device. The end of the air guide tube away from the external pneumatic device is connected to a first branch tube and a second branch tube. Solenoid valves are respectively installed on the liquid guide tube and the air guide tube.

[0017] As a preferred technical solution, a groove is formed on the outer surface of the first gel layer and the inner wall of the second gel layer. The two grooves are arranged opposite to each other, and the two grooves form a cavity for placing the first branch tube or the second branch tube.

[0018] As a preferred technical solution, the outer surfaces of both the first branch pipe and the second branch pipe are provided with a conductive layer, and the conductive layer is made of conductive fiber mesh.

[0019] As a preferred technical solution, both the first branch pipe and the second branch pipe include an inner layer and an intermediate layer. The inner layer is fixedly connected to the inner wall surface of the intermediate layer. The intermediate layer is a silicone matrix containing microcapsules. The conductive layer is fixedly connected to the outer surface of the intermediate layer.

[0020] As a preferred technical solution, an outer layer is provided on the outer surface of the intermediate layer and at the puncture area. The outer layer is a Nitinol film, and the inner wall of the outer layer is fixedly connected to the conductive layer. The outer layer integrates a micro resistance wire.

[0021] As a preferred technical solution, the system also includes a controller and an audible and visual alarm. Both the controller and the audible and visual alarm are installed in the inner cavity of the model body. The audible and visual alarm, pressure sensor array, external blood supply device, external pneumatic device, solenoid valve, conductive layer, and micro resistance wire are electrically connected to the controller.

[0022] This utility model has at least the following beneficial effects:

[0023] This application, through the combined use of an arm model, simulated skin, simulated blood vessels, a first Peltier element, and a vibrator, enables dynamic adjustment of the diameter and elasticity of simulated blood vessels. It can accurately simulate the vascular characteristics of children, the elderly, and those in pathological states (such as collapse and increased fragility), providing trainees with a highly realistic operating environment. Trainees can familiarize themselves with the puncture difficulties of different types of patients in the simulation, improving the success rate of clinical punctures in complex environments. It can simulate complex clinical scenarios (such as vascular collapse and increased resistance in patients with shock or obesity), helping medical staff master puncture techniques for different situations during training, reducing the number of trial and error attempts in actual operations, and thus reducing the pain and risk of complications caused by repeated punctures. It supports dynamic adjustment of vascular and tissue parameters (such as the vascular characteristics of children, the elderly, and patients in shock), meeting the teaching needs of different clinical scenarios and cultivating trainees' practical skills in dealing with different patient types. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the intelligent intravenous puncture training device of this utility model;

[0025] Figure 2 This is a schematic cross-sectional view of the intelligent intravenous puncture training device of this utility model;

[0026] Figure 3 This is a schematic cross-sectional view of the intelligent intravenous puncture training device of this utility model;

[0027] Figure 4 This is a schematic cross-sectional view of the first branch tube of the intelligent intravenous puncture training device of this utility model.

[0028] In the diagram: 1. Puncture area; 2. Temperature control area; 100. Arm model; 110. Model body; 120. First gel layer; 200. Simulated skin; 210. Skin layer; 220. Second gel layer; 300. Simulated blood vessel; 310. Fluid guide tube; 320. First branch tube; 321. Inner layer; 322. Middle layer; 323. Outer layer; 330. Second branch tube; 340. Air guide tube; 400. First Peltier element; 500. Vibrator; 600. Groove; 700. Second Peltier element. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-4 The present invention provides an intelligent intravenous puncture training device, including an arm model 100, the surface of which is covered with simulated skin 200, simulated blood vessels 300 on the arm model 100, puncture areas 1 at the elbow and wrist of the simulated blood vessels 300 respectively, and a temperature adjustment area 2 at the tip of the arm model 100.

[0031] The arm model 100 includes a model body 110, a first gel layer 120 fixedly connected to the surface of the model body 110, a first Peltier element 400 and a vibrator 500 installed vertically inside the model body 110, and the cooling surface of the first Peltier element 400 in contact with the top of the inner cavity of the model body 110; the simulated skin 200 includes a skin layer 210 made of latex and fitted onto the surface of the model body 110, a second gel layer 220 fixedly connected to the inner wall of the skin layer 210, the inner wall of the second gel layer 220 in contact with the outer surface of the first gel layer 120, and a simulated blood vessel 300 disposed between the first gel layer 120 and the second gel layer 220.

[0032] Both the first gel layer 120 and the second gel layer 220 are made of thermosensitive hydrogel. A second Peltier element 700 is embedded on the surface of the model body 110 at the puncture area 1. At least two second Peltier elements 700 are arranged sequentially along the blood delivery direction. The cooling surface of one second Peltier element 700 is in contact with the first gel layer 120, and the heating surface of the other second Peltier element 700 is in contact with the first gel layer 120, allowing for reversible sol-gel conversion in response to temperature changes. When the temperature decreases, it is in a sol state like a liquid; when the temperature is higher, it forms a hydrogel, thus simulating the resistance of adipose tissue.

[0033] The first gel layer 120 and the second gel layer 220 are both embedded with pressure sensor arrays. The pressure sensor arrays can be composed of several CYG500-silicon piezoresistive micro and thin dynamic pressure sensor arrays. The density of the pressure sensor arrays is ≥16 / cm2. The needle insertion angle and depth are fed back in real time through the piezoresistive sensors.

[0034] The simulated blood vessel 300 includes a liquid guide tube 310 connected to an external blood supply device. The end of the liquid guide tube 310 away from the external blood supply device is connected to a first branch tube 320 and a second branch tube 330 through a four-way pipe. The first branch tube 320 and the second branch tube 330 are both located on the first gel layer 120. By activating the external blood supply device, the liquid supply pump of the external blood supply device can be used to deliver simulated liquid to the first branch tube 320 and the second branch tube 330 to simulate blood flow.

[0035] The simulated blood vessel 300 also includes an air duct 340 connected to an external pneumatic device. The end of the air duct 340 away from the external pneumatic device is connected to the first branch pipe 320 and the second branch pipe 330 through a four-way pipe. Solenoid valves are installed on the liquid duct 310 and the air duct 340 respectively. By opening the solenoid valve on the air duct 340, the external pneumatic device is started. The negative pressure pump of the external pneumatic device can be used to make the first branch pipe 320 and the second branch pipe 330 have a lumen collapse rate of 30% to 60% to simulate the vascular collapse of a shock patient.

[0036] The outer surface of the first gel layer 120 and the inner wall of the second gel layer 220 are both provided with a groove 600. The two grooves 600 are arranged opposite each other and form a cavity for placing the first branch tube 320 or the second branch tube 330. The grooves 600 can accommodate the first branch tube 320 or the second branch tube 330, so that the arm model 100, the simulated skin 200 and the simulated blood vessel 300 can be detachably connected. After the simulated blood vessel 300 has undergone multiple puncture training, it can be removed and replaced.

[0037] The outer surfaces of the first branch pipe 320 and the second branch pipe 330 are provided with a conductive layer. The conductive layer is made of conductive fiber mesh. The leakage of the first branch pipe 320 and the second branch pipe 330 can be monitored in real time through the conductive layer.

[0038] The first branch tube 320 and the second branch tube 330 both include an inner layer 321 and an intermediate layer 322. The inner layer 321 is fixedly connected to the inner wall of the intermediate layer 322. The intermediate layer 322 is a silicone matrix containing microcapsules. The conductive layer is fixedly connected to the outer surface of the intermediate layer 322. The rupture threshold of the silicone matrix containing microcapsules is adjustable from 50 to 150 kPa, which can realize the elastic adjustment of the first branch tube 320 or the second branch tube 330 to simulate young / old blood vessels.

[0039] Among them, an outer layer 323 is provided on the outer surface of the intermediate layer 322 and located at the puncture area 1. The outer layer 323 is a Nitinol film. The inner wall surface of the outer layer 323 is fixedly connected to the conductive layer. The outer layer 323 integrates a micro resistance wire. By igniting Joule heating, the outer layer 323 undergoes a phase change, which can realize the diameter adjustment of the first branch tube 320 or the second branch tube 330 to simulate children's / adult blood vessels.

[0040] It also includes a controller and an audible and visual alarm. Both the controller and the audible and visual alarm are installed in the inner cavity of the model body 110. The audible and visual alarm, pressure sensor array, external blood supply device, external pneumatic device, solenoid valve, conductive layer, and micro resistance wire are electrically connected to the controller. When the puncture needle deviates from the central axis of the first branch tube 320 or the second branch tube 330 by 3mm, the piezoresistive sensor feeds back the needle insertion angle and depth data to the controller. The controller controls the operation of the audible and visual alarm. The controller can be a single-chip microcomputer of model STC89C51.

[0041] By combining a near-infrared optical positioning system with an accuracy of 0.1mm with AR glasses, three-dimensional projection teaching of the movement of the first branch tube 320 and the second branch tube 330 is realized.

[0042] A deep learning-based puncture quality evaluation system (convolutional neural network and long short-term memory network) is used to collect six-dimensional data, including needle insertion speed, needle holding angle, puncture depth, tissue deformation, blood vessel displacement, and operation time, through multimodal sensors. This generates an operation quality heatmap and provides improvement suggestions.

[0043] The working principle of this invention is as follows: By opening the solenoid valve on the air duct 340 and activating the external pneumatic device, the negative pressure pump of the external pneumatic device can cause the first branch tube 320 and the second branch tube 330 to collapse by 30% to 60% to simulate the vascular collapse of a shock patient; by activating the vibrator 500, the distal end of the model body 110 can be cooled down to 32°C to simulate the signs of circulatory failure; by activating the corresponding second Peltier element 700, the first gel layer 120 and the second gel layer 220 can be cooled or heated. When the temperature decreases, the first gel layer 120 and the second gel layer 220 are in a sol state like liquid; when the temperature increases, the first gel layer 120 and the second gel layer 220 form a hydrogel to simulate the resistance of adipose tissue; by energizing the micro-resistance wire and Joule heating it, the outer layer 323 undergoes a phase change, thereby achieving the cooling of the first branch tube 320 and the second branch tube 330. The diameter of tube 330 can be adjusted to simulate the blood vessel diameter of children and adults; the elasticity of the first branch tube 320 and the second branch tube 330 can be adjusted through a silicone matrix containing microcapsules to simulate the vascular fragility of young and old people; by activating the vibrator 500, the arm model 100 can be vibrated to simulate the limb tremors when a child cries; during puncture training, opening the solenoid valve on the guide tube 310 activates the external blood supply device, which uses the pump to deliver simulated liquid to the first branch tube 320 and the second branch tube 330 to simulate blood flow; the leakage of the first branch tube 320 and the second branch tube 330 can be monitored in real time through the conductive layer; the needle insertion angle and depth are fed back in real time through the piezoresistive sensor; when the puncture needle deviates from the central axis of the first branch tube 320 or the second branch tube 330 by 3mm, the piezoresistive sensor feeds back the needle insertion angle and depth data to the controller, and the controller controls the operation of the audible and visual alarm.

[0044] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An intelligent device for training intravenous puncture, characterized in that, include: An arm model (100) is covered with simulated skin (200) on its surface. The arm model (100) is provided with simulated blood vessels (300). The simulated blood vessels (300) are provided with puncture areas (1) at the elbow and wrist respectively. The arm model (100) is provided with a temperature regulating area (2) at its tip. The arm model (100) includes a model body (110), a first gel layer (120) is fixedly connected to the surface of the model body (110), and a first Peltier element (400) and a vibrator (500) are installed vertically inside the model body (110). The cooling surface of the first Peltier element (400) is in contact with the top of the inner cavity of the model body (110). The simulated skin (200) includes a skin layer (210) made of latex that is fitted onto the surface of the model body (110). A second gel layer (220) is fixedly connected to the inner wall of the skin layer (210). The inner wall of the second gel layer (220) is in contact with the outer surface of the first gel layer (120). The simulated blood vessel (300) is located between the first gel layer (120) and the second gel layer (220).

2. The intelligent intravenous puncture training device according to claim 1, characterized in that: Both the first gel layer (120) and the second gel layer (220) are made of thermosensitive hydrogel. A second Peltier element (700) is embedded on the surface of the model body (110) and at the puncture area (1). At least two second Peltier elements (700) are arranged sequentially along the blood delivery direction. The cooling surface of one second Peltier element (700) is in contact with the first gel layer (120), and the heating surface of the other second Peltier element (700) is in contact with the first gel layer (120).

3. The intelligent intravenous puncture training device according to claim 2, characterized in that: Pressure sensing arrays are embedded in both the first gel layer (120) and the second gel layer (220).

4. The intelligent intravenous puncture training device according to claim 3, characterized in that: The simulated blood vessel (300) includes a liquid guide tube (310) connected to an external blood supply device. The end of the liquid guide tube (310) away from the external blood supply device is connected to a first branch tube (320) and a second branch tube (330). The first branch tube (320) and the second branch tube (330) are both located on the first gel layer (120).

5. The intelligent intravenous puncture training device according to claim 4, characterized in that: The simulated blood vessel (300) also includes an air guide tube (340) connected to an external pneumatic device. The end of the air guide tube (340) away from the external pneumatic device is connected to the first branch tube (320) and the second branch tube (330). Solenoid valves are respectively installed on the liquid guide tube (310) and the air guide tube (340).

6. The intelligent intravenous puncture training device according to claim 5, characterized in that: A groove (600) is formed on the outer surface of the first gel layer (120) and the inner wall of the second gel layer (220). The two grooves (600) are arranged opposite to each other and form a cavity for placing the first branch pipe (320) or the second branch pipe (330).

7. The intelligent intravenous puncture training device according to claim 6, characterized in that: The outer surfaces of the first branch pipe (320) and the second branch pipe (330) are provided with a conductive layer, which is made of conductive fiber mesh.

8. The intelligent intravenous puncture training device according to claim 7, characterized in that: Both the first branch pipe (320) and the second branch pipe (330) include an inner layer (321) and an intermediate layer (322). The inner layer (321) is fixedly connected to the inner wall of the intermediate layer (322). The intermediate layer (322) is a silicone matrix containing microcapsules. The conductive layer is fixedly connected to the outer surface of the intermediate layer (322).

9. The intelligent intravenous puncture training device according to claim 8, characterized in that: The outer surface of the intermediate layer (322) and located at the puncture area (1) is provided with an outer layer (323), the outer layer (323) is a Nitinol film, the inner wall surface of the outer layer (323) is fixedly connected to the conductive layer, and the outer layer (323) integrates a micro resistance wire.

10. The intelligent intravenous puncture training device according to claim 9, characterized in that: It also includes a controller and an audible and visual alarm, both of which are installed in the inner cavity of the model body (110). The audible and visual alarm, pressure sensor array, external blood supply device, external pneumatic device, solenoid valve, conductive layer, and micro resistance wire are electrically connected to the controller.

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