JP5520263B2 - Vascular injection simulator - Google Patents

Description

  The present invention relates to a blood vessel injection simulator for practicing blood vessel injection such as blood collection, intravenous injection, and infusion.

In recent years, the importance of education or re-education for injection technology has been questioned in the field of basic nursing education and postgraduate education. In the field of education, injections between students are difficult due to ethical considerations, and students who are unqualified in clinical practice cannot be administered to patients.
Even in clinical settings where new graduates are educated, from the perspective of risk management, exercises are currently being conducted in-hospital before being applied to patients. For these reasons, the demand for vascular injection simulators is expanding both in the field of education and clinically.

  As a conventional blood vessel injection simulator, there is one proposed in Patent Document 1, for example.

Japanese Utility Model Publication No. 2-53067

  The device proposed in Patent Document 1 is a device for practicing vascular injection, and senses an imitation upper arm body in which an elastic tube imitating a blood vessel is embedded and an injection needle inserted into the elastic tube. A needle tip sensing means for teaching the degree of insertion of the injection needle into the blood vessel. Here, the needle tip sensing means is configured by disposing a light projecting element and a light receiving element in an open space in the elastic tube.

However, in the vascular injection simulator according to Patent Document 1, since simulated blood imitating blood is not injected into an elastic tube that looks like a blood vessel, it cannot be an injection practice for a human body that actually has blood in and out, There is a problem of lack of realism.
When the simulated blood is injected into the elastic tube, light is weakened by the simulated blood, so that it is difficult to accurately detect the insertion of the injection needle with the light projecting element and the light receiving element.

  The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a vascular injection simulator that can accurately determine the insertion of an injection needle and has excellent realism. is there.

In order to achieve the above object, a vascular injection simulator according to the present invention comprises:
A vascular injection simulator for practicing vascular injection,
Simulated blood vessels that mimic human blood vessels,
A simulated epidermis covering the simulated blood vessel;
An upper conductor interposed between the simulated epidermis and the simulated blood vessel, through which an injection needle can penetrate;
An injection needle insertion success determination circuit that determines that the injection needle has been inserted into the simulated blood vessel by energization of the electroconductive liquid injected into the simulated blood vessel and the upper conductor,
Injection needle insertion success notifying means for notifying the determination result of the injection needle insertion success by the operation of the injection needle insertion success determination circuit;
(First invention).

In the present invention,
A lower conductor is disposed below the simulated blood vessel,
For the operation of the injection needle insertion failure determination circuit that determines that the injection needle is not properly inserted into the simulated blood vessel by energization of the upper conductor and the lower conductor, and the operation of this injection needle insertion failure determination circuit It is preferable that an injection needle insertion failure informing means for informing the determination result of the injection needle insertion failure is provided (second invention).

In the present invention,
It is preferable that an insulating sheet is interposed between the upper conductor and the simulated blood vessel (third invention).

  In the present invention, when the injection needle that is inserted from the simulated epidermis and penetrates the upper conductor is inserted into the simulated blood vessel, the energized liquid in the simulated blood vessel and the upper conductor are energized through the injection needle. By operating the electrification needle success determination circuit by this energization, it is possible to accurately determine that the injection needle has been inserted into the simulated blood vessel, and the determination result is indicated by the injection needle insertion success notification means. Informed. Therefore, the degree of insertion of the injection needle into the blood vessel can be accurately taught. Moreover, since the electrolysis solution in the simulated blood vessel can be regarded as blood, there is an effect that the presence is excellent.

  Further, by adopting the configuration of the second invention, it can be accurately known that the injection needle has not been properly inserted into the simulated blood vessel.

  In addition, by adopting the configuration of the third invention, even if the electroconductive liquid leaks from the simulated blood vessel, it is possible to reliably prevent the leaked electroconductive liquid from contacting the upper conductor and causing a malfunction. Can do.

1 is an overall perspective view of a vascular injection simulator according to an embodiment of the present invention. Exploded perspective view of simulated arm Explanatory diagram of wearing usage example of simulated arm Explanatory diagram of needle insertion into simulated arm Block diagram of judgment notification circuit Operational explanatory diagram of judgment notification circuit (1) Operational explanatory diagram of the judgment notification circuit (2) Operation explanatory diagram of the judgment notification circuit (3)

  Next, specific embodiments of the blood vessel injection simulator according to the present invention will be described with reference to the drawings.

<Overview of vascular injection simulator>
A blood vessel injection simulator 1 shown in FIG. 1 is a training device for practicing blood vessel injection such as blood collection, intravenous injection, and drip, and includes a simulated arm body 2 and a determination notification device 3.

<Description of simulated arm>
The simulated arm body 2 imitates a part of the arm on the side where the vein can be slightly seen through the skin at the joint between the upper arm and the lower arm of a person.
As shown in FIG. 2, the simulated arm body 2 includes a box-shaped base 4 having a required accommodation space 4 a and opened upward.

  A lower conductor 5 is laid on the bottom of the base 4. On the upper side of the lower conductor 5, a sponge 7 for increasing the texture of the simulated arm body 2 is disposed via an insulating sheet 6. The sponge 7 is provided with a cut 7a, and two simulated blood vessels 8, 8 'are passed through the cut 7a. These simulated blood vessels 8 and 8 ′ are placed on the upper arm side portion of the sponge 7 from the cut 7 a of the sponge 7 via the lower conductor 5 ′ and the insulating sheet 6 ′, and the lower arm side portion thereof is placed on the upper surface side of the sponge 7. It is laid from the notch 7a of the sponge 7 on the lower surface side of the sponge 7, and is arranged side by side in a state in which the respective paths are slightly meandered. An upper conductor 9 is laid through an insulating sheet 6 ″ so as to cover the simulated blood vessels 8, 8 ′. A simulated skin 10 that covers the upper side of the upper conductor 9 and closes the opening of the base 4 is incorporated in the opening edge of the base 4.

<Description of conductor>
Each of the upper conductor 9 and the lower conductors 5 and 5 'is made of a conductive metal fiber sheet formed into a sheet shape by weaving conductive metal fibers. In each of the conductors 5, 5 ′ and 9, the fiber diameter, fiber density, etc., so that the injection needle 11 b can penetrate and the injection needle 11 b is always in contact with the conductive metal fiber and is in conduction when penetrating. Is selected.
In addition, as the conductors 5, 5 ′ and 9, it is only necessary to satisfy the condition that the injection needle 11b can penetrate and is always in conduction with the injection needle 11b when penetrating, and a conductive material may be used as appropriate. It is not limited to a metal fiber sheet.

<Description of simulated blood vessels>
The two simulated blood vessels 8 and 8 'imitate human veins using, for example, rubber tubes. For convenience of explanation, in FIG. 1, FIG. 2, and FIG. 4, the two simulated blood vessels 8, 8 ′ are drawn with the same thickness, but one simulated blood vessel 8 is thick and the other simulated blood vessel It is preferable in practice of practical injection techniques to use simulated blood vessels 8 and 8 'having different thicknesses, such as making 8' thinner.
As described above, the two simulated blood vessels 8 and 8 'have their upper arm side portions placed on the upper surface side of the sponge 7 from the cut 7a of the sponge 7, and their lower arm side portions thereof from the cut 7a of the sponge 7. It is laid on the lower surface side of the sponge 7. Thus, in each of the simulated blood vessels 8 and 8 ', the upper arm side portion is positioned near the epidermis inside the simulated arm body 2, while the lower arm side portion is positioned in the deep portion of the simulated arm body 2 and has different depths. It is embedded in the simulated arm body 2 so as to be laid.

  As shown in FIG. 1, one end of each simulated blood vessel 8, 8 ′ is taken out of the simulated arm body 2 through insertion holes 4 b, 4 b ′ (see FIG. 2) provided in one end of the base 4. The other end of the upstream hose 13 is connected via the trifurcated tube 12. One end of the upstream hose 13 is connected to a simulated blood bag 15 filled with simulated blood 14 simulating blood. A tubular electrode 16 through which simulated blood 14 can flow is embedded in the tube near the other end of the upstream hose 13. In addition, what is shown by the code | symbol 17 is a stand for hanging and supporting the simulation blood bag 15. FIG.

  The other end portion of each simulated blood vessel 8, 8 ′ is taken out of the simulated arm body 2 through insertion holes 4 c, 4 c ′ (see FIG. 2) provided in the other end portion of the base 4, and the trifurcated tube 18 is removed. And is connected to one end of the downstream hose 19. The downstream hose 19 is provided with a water stop adjust 20, and the water stop adjust 20 can stop the flow of the simulated blood 14 at an arbitrary position of the downstream hose 19.

<Explanation of simulated blood>
The simulated blood 14 injected into the simulated blood vessels 8 and 8 'is formed by blending water containing an electrolyte (for example, tap water) with a red pigment close to the color of the blood. Function as.

<Description of insulation sheet>
The insulating sheets 6, 6 ′, 6 ″ are made of, for example, insulating rubber. Even if the simulated blood 14 leaks out from the simulated blood vessels 8, 8 ′, the leaked simulated blood 14 remains as the upper conductor. 9 and the lower conductors 5 and 5 ′ to prevent the malfunction.

<Description of simulated skin>
The simulated epidermis 10 imitates the human epidermis using a resin sheet, and its thickness, hardness, etc. so as to be close to the touch of the skin and the needle 11b can be easily inserted. Is selected.

<Explanation of use case of simulated arm body>
A band 21 that can be bound and opened by a hook-and-loop fastener 21a is attached to the bottom surface of the base 4, and as shown in FIG. 3, the vein slightly passes through the skin at the joint between the upper arm and the lower arm. The simulated arm body 2 is placed on the see-through arm portion, and the band 21 is wound around and fixed, so that the practice of intravenous injection using the syringe 11 can be practiced.

<Description of judgment notification device>
As shown in FIG. 1, the determination notification device 3 is connected to the simulated arm body 2 via a required electric wire 22 in a neck-hanging manner.
On the surface portion of the determination notification device 3, a green light emitting diode 23 (hereinafter referred to as “green LED 23”) indicating the success of the procedure of inserting the injection needle 11b into the simulated blood vessels 8, 8 ′, or the failure of the procedure. A red light emitting diode 24 (hereinafter, referred to as “red LED 24”), a power switch 25, and the like are provided in a predetermined arrangement.
A determination notification circuit 30 as shown in FIG. 5 is incorporated in the determination notification device 3.

<Description of judgment notification circuit>
5 includes an upper conductor 9, lower conductors 5 and 5 ', a tubular electrode 16, a green LED 23, a red LED 24, a power supply 31, a PNP transistor 32, a buzzer 33, and a photo mos relay. 34 and required resistors 35, 36, 37, and 38 are connected by required wirings.

That is, the positive pole of the power source 31 is connected to the emitter terminal of the transistor 32, the positive terminal of the red LED 24, the positive terminal of the buzzer 33, and the VDD terminal of the photo-mos relay 34, respectively.
A resistor 35 is inserted between the positive pole of the power supply 31 and the base terminal of the transistor 32, and a resistor 36 is inserted between the positive pole of the power supply 31 and the positive terminal of the red LED 24.
The negative pole of the power source 31 is connected to the negative terminal of the green LED 23 and the upper conductor 9.
The base terminal of the transistor 32 is connected to the tubular electrode 16 via a resistor 37.
The collector terminal of the transistor 32 is connected to the plus terminal of the green LED 23 via the resistor 38.
The minus terminal of the red LED 24 and the minus terminal of the buzzer 33 are connected to the LED terminal of the photo moss relay 34, respectively.
The VSS terminal of the photo MOS relay 34 is connected to the lower conductors 5 and 5 ′.

<Description of the operation of the judgment notification circuit>
Next, the operation of the determination notification circuit 30 when performing a venous blood vessel injection procedure using the syringe 11 for the simulated arm body 2 as shown in FIG. 3 will be described with reference to FIGS. 4 and 6 to 8. To do. The syringe 11 used in carrying out this procedure is formed by mounting an injection needle 11b on an injection cylinder 11a, and the injection needle 11b is made of stainless steel having conductivity that is widely used in general. belongs to.

  As shown by the arrow A in FIG. 4, when the injection needle 11b penetrates the upper conductor 9 and is correctly inserted into the simulated blood vessel 8 ′, that is, when the procedure is successful, it is shown in FIG. As described above, the simulated blood 14 and the upper conductor 9 are energized via the injection needle 11b, and the upper conductor 9 and the tubular electrode 16 are electrically connected. Thereby, the power supply 31, the transistor 32, the resistor 37, the tubular electrode 16, the simulated blood 14, the injection needle 11b, and the upper conductor 9 are electrically closed, and the injection needle insertion success determination circuit 38 is activated. As the injection needle insertion success determination circuit 38 operates, a small current flows from the emitter terminal of the transistor 32 to the base terminal, and a large current flows from the emitter terminal of the transistor 32 to the collector terminal. Thereby, the green LED 23 is turned on.

As shown by the arrow B in FIG. 4, when the injection needle 11b penetrates the upper conductor 9, but does not pierce the simulated blood vessels 8, 8 ′, it comes into contact with the lower conductor 5, That is, when the procedure fails, as shown in FIG. 7, the upper conductor 9 and the lower conductor 5 are energized through the injection needle 11b, and the upper conductor 9 and the lower conductor 5 Are electrically connected. As a result, the power source 31, resistor 36, red LED 24, buzzer 33, photo moss relay 34, lower conductor 5, injection needle 11 b and upper conductor 9 are electrically closed, and the injection needle insertion failure determination circuit 39 is activated. Operate. By the operation of the injection needle insertion failure determination circuit 39, the red LED 24 blinks and an intermittent sound is emitted from the buzzer 33.
The same operation is performed when the injection needle 11b penetrates the upper conductor 9, but does not pierce the simulated blood vessels 8, 8 'and comes into contact with the lower conductor 5'.

As shown by an arrow C in FIG. 4, the injection needle 11 b penetrates the upper conductor 9 and is correctly inserted into the simulated blood vessel 8, and then contacts the lower conductor 5 through the simulated blood vessel 8. Then, as shown in FIG. 8, after the injection needle insertion success determination circuit 38 is operated, the injection needle insertion failure determination circuit 39 is also operated. Therefore, after the green LED 23 is turned on, the red LED 24 blinks and an intermittent sound is emitted from the buzzer 33.
The same applies to the case where the injection needle 11b penetrates the upper conductor 9 and is correctly inserted into the simulated blood vessel 8 ′ and then contacts the lower conductor 5 ′ through the simulated blood vessel 8 ′. Is activated.

<Description of effects>
In this embodiment, when the injection needle 11b pierced from the simulated epidermis 10 and penetrates the upper conductor 9 is properly inserted into the simulated blood vessels 8 and 8 '(for example, indicated by an arrow A in FIG. 4). State), the simulated blood 14 having electrical conductivity in the simulated blood vessels 8, 8 'and the upper conductor 9 are energized through the injection needle 11b. By this energization, it can be accurately determined that the injection needle 11b has been inserted into the simulated blood vessels 8 and 8 ', and the determination result is notified by the lighting of the green LED 23. Further, when the injection needle 11b is not properly inserted into the simulated blood vessels 8 and 8 '(for example, a state indicated by an arrow B or C in FIG. 4), the upper conductor 9 and the lower conductors 5 and 5 are used. 'Is energized through the injection needle 11b. By this energization, it can be accurately determined that the injection needle 11b has not been properly inserted into the simulated blood vessels 8 and 8 ', and the determination result is notified by the blinking of the red LED 24 and the buzzer 33. Therefore, it is possible to accurately educate the degree of insertion of the injection needle 11b into the simulated blood vessels 8, 8 ′. In addition, since the simulated blood 14 simulating blood is used as the electroconductive liquid injected into the simulated blood vessels 8 and 8 ', there is an advantage that the presence is excellent.

  The vascular injection simulator of the present invention has been described based on one embodiment, but the present invention is not limited to the configuration described in the above embodiment, and the configuration is appropriately changed without departing from the spirit of the simulator. Is something that can be done.

  For example, the green LED 23, the red LED 24, the buzzer 33, etc. were used as notifications of the success / failure of the needle insertion, but instead of or together with these, a voice sound generator or chime sound sound generator is used. It is also possible to use a voice or chime sound to notify the determination result of the success or failure of needle insertion.

  The blood vessel injection simulator according to the present invention has a characteristic that it can accurately determine the insertion of the injection needle and is excellent in a sense of reality, so that blood vessel injection practice such as blood collection, intravenous injection, infusion, etc. It can use suitably for a use.

DESCRIPTION OF SYMBOLS 1 Blood vessel injection simulator 5,5 'Lower conductor 6,6', 6 "Insulation sheet 8,8 'Simulated blood vessel 9 Upper conductor 10 Simulated epidermis 11b Injection needle 14 Simulated blood (electric current solution)
23 Green light-emitting diode (injection needle insertion success notification means)
24 Red light emitting diode (injection needle insertion failure notification means)
33 Buzzer 38 Injection needle insertion success determination circuit 39 Injection needle insertion failure determination circuit

Claims (3)

A vascular injection simulator for practicing vascular injection,
Simulated blood vessels that mimic human blood vessels,
A simulated epidermis covering the simulated blood vessel;
An upper conductor interposed between the simulated epidermis and the simulated blood vessel, through which an injection needle can penetrate;
An injection needle insertion success determination circuit that determines that the injection needle has been inserted into the simulated blood vessel by energization of the electroconductive liquid injected into the simulated blood vessel and the upper conductor,
Injection needle insertion success notifying means for notifying the determination result of the injection needle insertion success by the operation of the injection needle insertion success determination circuit;
A blood vessel injection simulator comprising: A lower conductor is disposed below the simulated blood vessel,
For the operation of the injection needle insertion failure determination circuit that determines that the injection needle is not properly inserted into the simulated blood vessel by energization of the upper conductor and the lower conductor, and the operation of this injection needle insertion failure determination circuit The vascular injection simulator according to claim 1, further comprising injection needle insertion failure notifying means for notifying the determination result of the injection needle insertion failure.   The blood vessel injection simulator according to claim 1 or 2, wherein an insulating sheet is interposed between the upper conductor and the simulated blood vessel.

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