TWI786965B - Simulated venous missed needle training arm - Google Patents

Abstract

A training arm for simulating a missed needle in a vein, which provides simulation of skin swelling when a needle is missed when an automatic injector is used to perform dynamic contrast large-dose injection. It includes a simulated arm, two automatic injectors, a connecting pipe, a pressure detector, It is composed of a pressure indicator, two electric push rod mechanisms, and two electric push rod controllers. In this way, the present invention uses a balloon to simulate the swelling of the vein when the needle leaks, and displays the pressure change inside the arm through the pressure detector. Compared with other traditional intravenous injection practice arms, which only have a single function of practicing needle sticking, a function of displaying pressure is added. The function and the way of decompression can help students learn and understand the seriousness of missed needles during daily practice, and can also help students to calmly deal with missed needles, so as to achieve the purpose of creative teaching.

Description

Simulated venous missed needle training arm

The invention relates to a training arm for simulating a missed needle in a vein, especially relates to a The balloon simulates the swelling of the vein when the needle is leaked, and displays the pressure change inside the arm through the pressure detector. In particular, it can help students learn to understand the seriousness of the needle leak, and can also help students calmly cope with the needle leak , to achieve the purpose of creative teaching.

The injection of contrast agent is necessary for many radiological examinations, and the contrast agent can effectively improve the image quality. Image quality, including contrast injection rate and total injection volume. Extravasation refers to the outflow of fluid from the blood vessel to the surrounding tissue through the blood vessel. The leakage of the contrast agent is related to the type, type and injection method of the examination. Automated injectors are used to perform dynamic bolus contrast. Enhancement), that is, the method of bolus injection into the human body through intravenous high-pressure injection of contrast agent, the general injection rate and dose are 2-5 ml/sec and 25-100 ml. Leakage of contrast medium in a correctly placed venous catheter is often due to phlebitis or increased venous resistance, and leakage injury (extravsationiy) is the damage to surrounding tissues caused by fluid leakage. The early symptoms are: Pain, burning sensation, tingling, itching, and redness and swelling along the veins at the leakage site are severe, resulting in sequelae such as tissue necrosis, thrombophlebitis, cellulitis, and vascular embolism. When the contrast agent is a high-concentration solution accidentally leaking out of the blood vessel, it will cause tissue irritation and damage at the leakage site, resulting in severe pain and even local necrosis. Patients often have symptoms of swelling and pain. When the leakage is large, rashes, rashes, and Swelling, blisters and other local signs. In addition to the leakage of contrast medium in radiological examination items, general intravenous injection of drugs will also cause leakage. The blood flow osmotic pressure of microvascular in general tissues is about 30 to 45 mmHg After a period of time, the injured tissue will swell and cause ischemia. If the muscle tissue ischemia exceeds four hours, irreversible necrosis will begin to occur in the tissue. At this time, the pressure of the muscle soft tissue will be higher than the microvascular perfusion pressure. , the ability to supply oxygen for metabolism is lost, and soft tissue necrosis begins. Once the affected area is too large, it may even cause compartment syndrome (Compartment Syndrome). In severe cases, it is necessary to consult with the surgeon whether fasciotomy is required to decompress the swollen affected limb.

The traditional IV practice manikin can only provide practice IV technique, its main Focusing on the learning of injection skills, students cannot learn from these molds the situation when the needle is missed, the physiological changes inside the tissue, and the cause and treatment of compartment syndrome (surgical decompression). In the case of missed needles due to unexpected factors, many imaging examinations require large doses of contrast agents to obtain images, so ordinary exercises are more important to help students learn and understand the seriousness of missed needles, and can also help students Can calmly deal with missing stitches.

Given that injection of contrast media is necessary for many radiological examinations, the currently available Most of the teaching aids in the room are for practicing intravenous injection, and there is no teaching aid for simulating the situation of missed needles. These design techniques that can only practice acupuncture can no longer meet the technical and teaching/learning needs. For this reason, it is necessary to develop a set of inventions that can solve the problem of missed needles and the technical shortcomings of previous cases from the design ideas of these intravenous injection practice models and the situation when needles are missed.

The main purpose of the present invention is to overcome the above-mentioned problems encountered in the prior art and provide It provides a balloon to simulate the swelling of the vein when the needle leaks, and displays the pressure change inside the arm through the pressure detector. Compared with other traditional intravenous injection practice arms, which only have a single function of practicing needle sticking, it adds a function of displaying pressure and reduces pressure. The way of pressing can help students learn and understand the seriousness of missed needles during normal practice, and can also help students to calmly deal with missed needles, so as to achieve the purpose of creative teaching and simulate venous missed needle training arms.

In order to achieve the above purpose, the present invention is a training arm for simulating venous missed needle, which is a bag It includes: a simulated arm with a balloon inside, and a silicone tube connected to the opening of the balloon; two automatic injectors, each of which includes an empty syringe and a piston, the empty syringe has an inner surface and an outlet, the The front end of the piston is slidably and sealingly engaged with the inner surface of the empty syringe to execute the action of injection, and the air in the empty syringe is injected into the balloon, causing the balloon to swell to simulate a vein leakage; A connecting tube, one end of which is connected to the silicone tube, and the other two ends of the connecting tube are respectively connected to the outlet of the empty syringe of each automatic injector; a pressure detector is arranged under the balloon to detect the analog The balloon in the arm is swollen and compressed by at least one air injected by the auto-injector to generate a first pressure value, and detects that the simulated arm generates a second pressure value after applying a decompression treatment procedure; a pressure display, connected to The pressure detector is used to display the pressure change inside the simulated arm through the pressure detector, including displaying the first pressure value generated by the inflation and compression of the balloon in the simulated arm when the simulated venous leak needle is leaked, and Displaying the second pressure value generated by the balloon in the simulated arm after decompression treatment is applied; two electric push rod mechanisms, each of which includes a body, a telescopic push rod and a push plate, the telescopic push rod One end of the rod is passed through the body, and the other end is fixedly connected to the push plate. The push plate of each electric push rod mechanism abuts against the piston of an automatic injector to push the empty syringe of the automatic injector. air entering the balloon in the simulated arm, causing the balloon to inflate to trigger the pressure detector; and two electric push rod controllers, each of which is operatively connected to each of the electric push rod mechanisms, It is used to adjust the pushing speed of the corresponding electric push rod mechanism.

In the above embodiments of the present invention, the simulation arm is made of Styrofoam.

In the above-mentioned embodiment of the present invention, the pushing plate is in a vertical Z shape, including an upper a parallel part, which is fixed on the other end of the telescopic push rod; a lower parallel part, which abuts against the piston of the automatic injector; and a vertical part, which connects the upper and lower parallel parts, and the upper and lower parallel parts The direction of extension is opposite.

In the above-mentioned embodiments of the present invention, the connecting pipe fitting is a Y-shaped tubular structure, and is provided with a joint head.

In the above embodiments of the present invention, the joint is a Y-shaped joint or a T-shaped joint.

In the above-mentioned embodiment of the present invention, the decompression therapy procedure is performed by sticking needles into the silicon gel Tube suction, or cut the skin of the simulated arm to leak or expose the balloon to reduce the pressure on the pressure detector.

Please refer to "Figure 1", which is the structure of the simulated venous needle training arm of the present invention schematic diagram. As shown in the figure: the present invention is a training arm for simulating a missed needle in a vein, which provides a simulation of the situation of skin swelling when a needle is missed when an automatic injector is used to perform a large-dose injection of dynamic contrast. The proposed simulated venous missed needle training arm system includes a simulated arm 1, two automatic injectors 2, a connecting tube 3, a pressure detector 4, a pressure display 5, two electric push rod mechanism 6, and two electric push rod control Device 7 constitutes.

The aforementioned simulated arm 1 is made of Styrofoam with a balloon inside 11. The opening of the balloon 11 is connected with a silicon rubber tube 12.

Each of the automatic injectors 2 includes an empty syringe 21 and a piston 22 . The empty syringe 21 has an inner surface 211 and an outlet 212, and the front end of the piston 22 is slidably and sealingly engaged with the inner surface 211 of the empty syringe 21 to perform the injection action, injecting the air in the empty syringe 21 The balloon 11 is used to make the balloon 11 swell to simulate a leaked needle in a vein.

One end of the connecting tube 3 is connected to the silicone tube 12, and the other two ends of the connecting tube are respectively Connect to the outlet 212 of the empty syringe 21 of each of the automatic injectors 2 . Among them, the connecting pipe fitting 3 It is a Y-shaped tubular structure and is provided with a joint 31, which can be a Y-shaped joint or a T-shaped joint.

The pressure detector 4 is set under the balloon 11 to detect the pressure inside the simulated arm 1. The balloon 11 is inflated and compressed by at least one air injected by the auto-injector 2 to generate a first pressure value, and detects that the simulated arm 1 generates a second pressure value after applying a decompression treatment program.

The pressure indicator 5 is connected to the pressure detector 4 to pass through the pressure detector 4 displaying the pressure change inside the simulated arm 1, including displaying the first pressure value produced by the inflation and compression of the balloon 11 in the simulated arm 1 when the needle leaks in the simulated vein, and displaying the pressure applied to the balloon 11 in the simulated arm 1 The second pressure value generated after the decompression treatment.

Each electric push rod mechanism 6 includes a body 61, a telescopic push rod 62 and a push rod plate 63, one end of the telescopic push rod 62 is installed in the body 61, and the other end is fixedly connected to the pushing plate 63. The push plate 63 of each electric push rod mechanism 6 is in a vertical Z shape, including an upper parallel part 631, which is fixed on the other end of the telescopic push rod 62; The plunger 22 of the syringe 2; and a vertical portion 633 connecting the upper and lower parallel portions 631, 632, and the extension directions of the upper and lower parallel parts 631, 632 are opposite. Each of the electric push rod mechanisms 6 is used to push the air in the empty syringe 21 of the corresponding auto-injector 2 into the balloon 11 in the simulation arm 1 to inflate the balloon 11 and trigger the pressure detector 4 .

Each of the electric push rod controllers 7 is operatively connected to each of the electric push rod mechanisms 6 for To adjust the corresponding pushing rate of the electric push rod mechanism 6 . If so, a brand-new simulated venous leak training arm is formed by the structure disclosed above.

When in use, students can adjust the electric push rod mechanism 6 through the electric push rod controller 7. Pushing speed, the body 61 of the electric push rod mechanism 6 drives the telescopic push rod 62 to push outward, so that the upper parallel part 631 of the push plate 63 will abut the automatic injector 2 on the lower parallel part 632 driven by the telescopic push rod 62 The piston 22 slides along the inner surface 211 of the empty syringe 21, thereby pushing the air in the empty syringe 21 into the balloon 11 in the simulated arm 1, causing the balloon 11 to swell. condition and trigger the pressure detector 4 to display the value, causing the value of the compressed pressure detector 4 to change. At this time, the surface protrusion of the simulated arm 1 is similar to the real leaking needle, and the swelling can be seen through the hand The change of the pressure value on the touch and pressure detector 4 is used to express the appearance, touch and scientific evidence when the needle is dropped. In the part of the treatment, the needle can be inserted into the silicone tube 12 for suction, or the skin of the simulated arm 1 can be cut open with a sharp blade of a scalpel to let the balloon 11 leak or be exposed to reduce the pressure on the pressure detector 4. The pressure value displayed on the pressure display 5 will decrease to achieve the treatment method of surgical decompression, and then achieve the effect of medical decompression teaching.

In this way, the present invention uses a balloon to simulate the swelling of a vein when a needle leaks, and through the pressure The detector shows the pressure changes inside the arm. Compared with other intravenous injection practice arms, which only have a single needle practice function, it adds a pressure display function and a way to reduce pressure. It can help students learn to understand the seriousness of missed needles during normal practice. It can also help students calmly deal with missing stitches and achieve the purpose of creative teaching.

In summary, the present invention is a simulated venous missed needle training arm, which can effectively improve the With various shortcomings, the balloon is used to simulate the swelling of the vein when the needle leaks, and the pressure change inside the arm is displayed through the pressure detector. In addition to the function of practicing intravenous injection, it also has the ability to simulate the situation of the needle leak. By increasing the pressure display The function and the way of decompression teaching can help students learn and understand the seriousness of missed needles during daily exercises, and can also assist students to cope with the occurrence of missed needles, so as to achieve the purpose of creative teaching, and then make the production of the present invention more effective. Progressive, more practical, and more in line with the needs of users, and indeed meet the requirements for invention patent applications, please file a patent application in accordance with the law.

However, what is described above is only a preferred embodiment of the present invention, and should not be limited thereto. The scope of the implementation of the present invention; therefore, all brief descriptions made according to the scope of patent application for the present invention and the content of the description of the invention Any single equivalent change and modification shall still fall within the scope covered by the patent of the present invention.

1: Simulation arm 11: Balloon 12: Silicone tube 2: Auto-injector 21: Empty syringe 211: Inner surface 212: Export 22: Piston 3: Connect pipe fittings 31: Connector 4: Pressure detector 5: Pressure display 6: Electric push rod mechanism 61: Ontology 62: telescopic push rod 63: Push plate 631: Upper Parallel Section 632: lower parallel part 633: Vertical section 7: Electric push rod controller

Figure 1 is a schematic diagram of the structure of the simulated venous leak needle training arm of the present invention.

1: Simulation arm

11: balloon

12:Silicone tube

2: Auto injector

21: empty syringe

211: inner surface

212: Export

22: Piston

3: Connect pipe fittings

31: Connector

4: Pressure detector

5: Pressure display

6: Electric push rod mechanism

61: Ontology

62: telescopic push rod

63: push plate

631: Upper parallel part

632: lower parallel part

633: vertical part

7: Electric push rod controller

Claims (6)

A simulated venous missed needle training arm, comprising: a simulated arm with a balloon inside, and a silicon rubber tube connected to the opening of the balloon; two automatic injectors, each of which includes an empty syringe and a piston, the empty syringe Having an inner surface and an outlet, the front end of the piston is slidably and sealingly engaged with the inner surface of the empty syringe to perform the injection action, the air in the empty syringe is injected into the balloon, causing the balloon to produce Simulate the swelling situation when the venous needle leaks; a connecting tube, one end of which is connected to the silicon rubber tube, and the other two ends of the connecting tube are respectively connected to the outlet of the empty syringe of each automatic injector; a pressure detector is arranged on Below the balloon, it is detected that the balloon in the simulated arm is swelled and pressed by at least one air injected by the auto-injector to generate a first pressure value, and it is detected that the simulated arm generates a first pressure value after applying a decompression therapy procedure 2. Pressure value; a pressure display, connected to the pressure detector, used to display the pressure change inside the simulated arm through the pressure detector, including displaying the swelling and compression of the balloon in the simulated arm when it passes through the simulated venous leakage needle The generated first pressure value, and displaying the second pressure value generated by the balloon in the simulated arm after applying decompression therapy; two electric push rod mechanisms, each of which includes a body, a telescopic push rod mechanism Rod and a push plate, one end of the telescopic push rod is installed in the body, and the other end is fixedly connected to the push plate, the push plate of each electric push rod mechanism abuts against the piston of each automatic injector for push the air in the empty syringe of the auto-injector into the balloon in the simulated arm, causing the balloon to inflate and trigger the pressure detector; and two electric push rod controllers, each of which can operate The ground is connected to each of the electric push rod mechanisms to adjust the pushing speed of the corresponding electric push rod mechanisms. According to the simulated venous missed needle training arm described in item 1 of the scope of patent application, the simulated arm is made of Styrofoam. According to the simulated venous missed needle training arm described in item 1 of the scope of the patent application, the pushing plate is in a vertical Z shape, including an upper parallel part fixed on the other end of the telescopic push rod; a lower parallel part , which abut against the plunger of the automatic injector; and a vertical part, which connects the upper and lower parallel parts, and the extending directions of the upper and lower parallel parts are opposite. According to the simulated venous missed needle training arm described in item 1 of the scope of the patent application, the connecting pipe is a Y-shaped tubular structure with a joint. According to the simulated venous leakage needle training arm described in item 4 of the scope of the patent application, the joint is a Y-shaped joint or a T-shaped joint. According to the simulated venous leakage needle training arm described in item 1 of the scope of the patent application, the decompression treatment procedure is performed by inserting a needle into the silicone tube for suction, or cutting the skin of the simulated arm so that the balloon leaks or is exposed. Reduces the pressure on this pressure sensor.

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