JP2010243867A - Injection practice device and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an injection practice device that can be used repeatedly, and allows a user to practice injection to a hypodermic blood vessel while it is analogous to a blood vessel of a human body and a similar feeling is given. <P>SOLUTION: The injection practice device includes: a silicone rubber sheet 1 of high elasticity in a lower layer, constituting a high elasticity layer; a silicone rubber sheet 2 of low elasticity in an upper layer, constituting a low elasticity layer of a joining state on its top surface; and a tube 3a for a large-diameter simulated blood vessel and a tube 3b for a small-diameter simulated blood vessel, both being buried into the silicone rubber sheet 2 of low elasticity. The silicone rubber sheet 1 of high elasticity and the silicone rubber sheet 2 of low elasticity constitute a base material 4. The tubes 3a and 3b for large-diameter and small-diameter simulated blood vessels are constituted by a tube member molded of silicone rubber. The tubes 3a and 3b for simulated blood vessels are pushed on the side of the silicone rubber sheet 2 of low elasticity by the elastic force of the silicone rubber sheet 1 of high elasticity, and a part on the corresponding outer surface side of the silicone rubber sheet 2 of low elasticity is swelled to the outer surface. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an injection training device in which the state of a blood vessel observed from the outside approximates that of a human body, and a method for manufacturing the same.

There are various examples of this type of injection training device.
For example, it is disclosed in Patent Document 1 that “a device for practicing vascular injection, in which an elastic body is used as a material and a plurality of vascular mimetic elastic tubes are embedded in the surface layer portion, and in a vascular mimetic elastic tube And a correct / incorrect determination display section of the insertion position of the injection needle into the
The imitation upper arm body senses the insertion portion showing the position where the injection needle is inserted into the blood vessel imitation elastic tube on the upper surface and the injection needle inserted into the elastic tube at a position close to the insertion portion. A mechanism and a stop plate embedded under the elastic tube and for receiving the injection needle penetrating the tube;
The determination display unit is a vascular injection training device in which a lamp that is turned on when the sensing mechanism senses the injection needle in the elastic tube is provided on the board.

  Since this vascular injection training device is configured as an imitating upper arm body, there is an advantage that the injection practice can be performed with a sense that an injection is made to an actual arm. However, the site where the needle is inserted is limited to the insertion site, and this site is displayed on the upper surface of the arm, and the practice that seems to be important for the practice of injection is to find the appropriate needle insertion site. I can't do it. Moreover, since the insertion of the injection needle is to be performed only on the displayed portion, there is a problem that the number of repeated uses is limited. Furthermore, in this vascular injection training device, the vascular mimetic elastic tube is only embedded in the mimic upper arm composed of an elastic body, so that the state of the blood vessel observed from the outside is unnatural. Like this, even if the insertion position of the injection needle is fixed and the injection needle can only be inserted into that part, it is preferable if it is possible to practice finding the part while searching for blood vessels, but it is not possible .

  Patent Document 2 relates to a wearable injection blood sampling technique practice model, which includes “a soft thin skin member simulating a human skin, and a subcutaneous tissue disposed on one surface of the thin skin member. Alternatively, it is a band-like wearable injection blood sampling technique practice model consisting of a soft thick member simulating muscle tissue and a protective member below it, and a human body injection blood sampling site simulation part simulating blood vessels in the thick member It is a wearable injection blood sampling technique practice model that is embedded and has attachment portions for detachably attaching to both ends of the human body or a required part of the human body model.

  This wearable injection blood sampling technique practice model is composed of a thin skin-like member simulating skin and a soft thick member simulating subcutaneous tissue or muscle tissue, and a simulated blood vessel is arranged in the thick member. When an injection needle is inserted for practice of intravenous injection, subcutaneous injection, or intramuscular injection, there seems to be an effective aspect for acquiring each insertion sensation. However, since the blood vessel is merely embedded in the thick member constituting the subcutaneous tissue or muscle tissue, the state of the blood vessel is not necessarily natural. For example, when practicing intravenous injection, the blood vessel is appropriately positioned. I can't practice stabbed in search.

  Patent Document 3 relates to an injection practice instrument, which is “in an injection practice instrument in which a simulated blood vessel made of an elastic tube is disposed in a frame and the simulated blood vessel is covered with a simulated muscle layer, the simulated muscle layer includes the frame. A lower layer simulated muscle layer made of a polyurethane gel material disposed at the bottom of the body, and an upper layer simulated muscle layer formed by filling a polyurethane gel material into a polyurethane bag material. And an injection training device in which the simulated blood vessel is disposed between the upper layer and the upper simulated muscle layer.

  According to this injection practice device, it may be possible to practice injection with a feeling close to that of the actual human body for blood vessels located deep in the skin, but it is quite different from blood vessels located in shallow skin. The situation seems to be totally unsuitable for practice in such cases.

Japanese Utility Model Publication No. 5-14293 Utility Model Registration No. 2541332 JP 2007-206379 A

  It is an object of the present invention to provide an injection training device that can withstand repeated use and that can be practiced with the same feel as a human body when practicing injection into a subcutaneous blood vessel, and a method of manufacturing the same. And

  1 of the present invention is a base material comprising a high elasticity layer and a low elasticity layer bonded to one surface of the high elasticity layer, embedded in the base material, both ends projecting from the end of the base material, Further, the portion of the low elasticity layer that is in contact with the high elasticity layer on the circumferential side is pushed to the low elasticity layer side by the elasticity of the high elasticity layer, and the portion on the opposite side of the circumference is in contact with the low elasticity layer. An injection training device constituted by a simulated blood vessel tube arranged to push all or part of the low elasticity layer so that the outer surface of the low elasticity layer is expanded.

  According to 2 of the present invention, in the injection training device of 1 of the present invention, the high elasticity layer is composed of a rubber material having a rubber hardness of 35 to 60 degrees, and the low elasticity layer is composed of a rubber hardness of 10 to 30 degrees. It is composed of rubber material.

  According to the third aspect of the present invention, one or more simulated blood vessel tubes in which a rigid core material is penetrated are placed on a high elasticity rubber sheet constituting the high elasticity layer, The core material is pressed against the high-elasticity rubber sheet so as to be sunk in the high-elasticity rubber sheet, and while maintaining the state, the high elasticity rubber sheet and the simulated blood vessel tube By arranging the rubber generating material so as to be in a bonded state, and subsequently forming the low elastic rubber sheet constituting the low elastic layer by rubberizing the rubber generating material, and then removing the core material, Low elasticity rubber sheet constituting the low elasticity layer by pushing the simulated blood vessel tube toward the low elasticity rubber sheet side constituting the low elasticity layer by the elasticity of the high elasticity rubber sheet constituting the high elasticity layer The simulated blood vessel tube All or part of the outer surface that corresponds to the site located so as to bulge state to produce a first injection trainer of the present invention, a method for producing injection trainer.

4 of the present invention is the method for producing an injection training device of 3 of the present invention, wherein the high elasticity rubber sheet constituting the high elasticity layer has a rubber hardness of 35 to 60 degrees and a vulcanized quadrilateral shape The silicon rubber sheet is used, and the vulcanized silicon rubber sheet is placed in a quadrilateral mold in plan view.
As the simulated blood vessel tube, one or more silicon rubber tubes are adopted, and the silicon rubber tubes are placed in a pressed state on the highly elastic silicon rubber sheet after passing through a metal core material. The silicon rubber tube is sunk in the high elasticity silicon rubber sheet,
As the rubber generating material, an unvulcanized silicon rubber material is employed, and the unvulcanized silicon rubber material is a high elasticity silicon rubber sheet constituting the high elasticity layer and a silicon rubber tube disposed thereon. The silicon rubber material is heated and pressurized from above to form a low elasticity silicon rubber sheet having a rubber hardness of 10 to 30 degrees to form a low elasticity layer, and then the silicon rubber tube A low elasticity corresponding to the position where the silicon rubber tube is located by extracting the metal core material from the core and extruding the silicon rubber tube with the elasticity of the high elasticity silicon rubber sheet constituting the high elasticity layer The whole or a part of the outer surface of the low elasticity silicon rubber sheet constituting the conductive layer is made to bulge.

  According to the injection practice device of the present invention, if the simulated blood vessel tube is connected to a simulated blood circulation supply device and used for practice of blood vessel injection, that is, intravenous injection or intravenous drip injection, etc. Since the blood vessel tube is the one in which all or part of the outer surface of the low elasticity layer corresponding to the site where the blood vessel tube is located is raised like the actual blood vessel, in the practice, By searching for the position of the blood vessel from the surface raised state and inserting a needle into it, it is possible to practice vascular injection such as intravenous injection that is very effective that approximates the actual injection. In addition, since the high elasticity layer is located below the simulated blood vessel tube, when practicing vascular injection, if the false blood vessel tube was accidentally pierced, it was stuck in the lower high elasticity layer. Since the touch is the same as when the human body accidentally penetrates the blood vessel, there is also an advantage that such a touch can be learned. In addition to the vascular injection practice as described above, practice such as subcutaneous injection and intramuscular injection can be performed without inconvenience using other parts.

  In addition, the injection practice device 1 of the present invention is also configured such that a configuration approximating the human tissue as described above can be easily created.

  The simulated blood circulation supply device connects, for example, a simulated blood tank for storing simulated blood, and the simulated blood tank and the simulated blood vessel tube for circulating the simulated blood in the simulated blood tank. And a pump device that circulates the simulated blood in the simulated blood tank, the simulated blood tank, the supply tube, the simulated blood vessel tube, the supply tube, and the simulated blood tank It is.

  According to the injection practice device of 2 of the present invention, there is an advantage that when practicing injection, the feel of sticking with an injection needle can be felt in the same way as when actually sticking into a human body.

  According to the method for manufacturing the injection training device of 3 and 4 of the present invention, both of the injection training device are created so that the blood vessel is raised on the surface of the skin as necessary and extremely easily. be able to.

(a) is a plan view of the injection training device of the example, (b) is a view of (a) seen from the right side, (c) is a front view, and (d) is an enlarged view of the front view of (c). The top view which shows the state which inserted and laid the high elasticity silicon rubber sheet which comprises a highly elastic layer in a shaping | molding die, and pressed and arrange | positioned the silicone rubber tube for simulated blood vessels which penetrated the metal core material on it. (a) is a cross-sectional explanatory view showing a state where a silicon rubber sheet constituting a highly elastic layer is to be inserted into a mold, and (b) is a silicon rubber sheet constituting a highly elastic layer being mounted on a mold. Cross-sectional explanatory drawing showing the state of laying, (c) is placed on the silicone rubber sheet constituting the high elasticity layer and pressed downward, the simulated blood vessel silicone rubber tube penetrated by the metal core, and further Cross-sectional explanatory view showing a state in which an unvulcanized silicon rubber material is arranged on top, (d) is a cross-sectional view showing a state in which an upper mold is arranged and heated and pressurized, (e) is a diagram (d) Cross-sectional explanatory drawing of the orthogonal direction of).

  The injection training device of the present invention basically has a base material composed of a high elasticity layer and a low elasticity layer bonded thereto, and a part of the circumferential side of the base material on the low elasticity layer side of the base material. This is composed of a simulated blood vessel tube embedded so as to be in pressure contact with the boundary surface of the highly elastic layer.

  Both the high elasticity layer and the low elasticity layer constituting the base material can be made of various materials that are elastic and can be pierced with an injection needle. For example, olefin rubber such as ethylene / propylene copolymer, low density polyethylene, butyl rubber, synthetic rubber such as polyester polyurethane, polyurethane, silicon rubber, or natural rubber can be employed.

  The high elasticity layer can be composed of various rubbers as described above. The rubber hardness is suitably about 35 to 60 degrees, and the low elasticity layer is 10 to 30. It is appropriate to set the degree.

  Although the base material comprised by the above highly elastic layer and low elasticity layer can be comprised in various sizes, For example, length: width: thickness = 80-120: 60-100: 7 It is convenient in use to form a plate shape of about -10 (mm). It is appropriate that the thicknesses of the high elasticity layer and the low elasticity layer are approximately the same. However, the base material is not limited to these sizes as described above. In particular, the low elasticity layer need not have a uniform thickness throughout. On the contrary, by changing the thickness for each position as necessary, a state approximating the state of an actual human arm or leg can be created, which may be suitable for injection practice.

  As the simulated blood vessel tube, a tube made of rubber similar to that of the base material can be used. It is appropriate that the diameter correspond to that of a blood vessel located in a person's arm or leg or other site where injection may occur. Specifically, a diameter of about 1 to 10 mm is appropriate. About 2 to 7 mm is more preferable. The simulated blood vessel tube is one in which one or more are embedded in the base material, but the number thereof is not limited. In addition, the diameters of the plurality of simulated blood vessel tubes to be embedded need not be the same. On the contrary, it may be more convenient for practice to be all different. As described above, both ends of the simulated blood vessel tube are exposed from the end portion (side) of the base material. Both ends of the simulated blood vessel tube may be configured to protrude from not only the end portions (sides) parallel to each other but also the end portions (sides) adjacent to each other.

  In addition, as described above, the simulated blood vessel tube is embedded in the low elasticity layer side of the base material, but is embedded after a part of the peripheral side is brought into pressure contact with the boundary surface of the high elasticity layer. I will do it. The effect is to cause the simulated blood vessel tube to be pushed back to the low elasticity layer side by the elasticity of the high elasticity layer. As a result, the simulated blood vessel tube has a function of pushing the portion of the low elasticity layer in contact with the high elasticity layer in the direction opposite to the high elasticity layer on the circumferential side (outer circumferential side) near the side opposite to the high elasticity layer. When the portion of the low elasticity layer that is in contact with the outer peripheral side of the simulated blood vessel tube is thin, the outer surface of the portion easily bulges and the blood vessel is raised. When it is thick, the degree of bulging becomes small. Therefore, by varying the thickness of the low elasticity layer for each part, the degree of swelling on the outer surface side of the embedded simulated blood vessel tube can be varied.

  Such a simulated blood vessel tube according to the present invention includes, for example, one or more simulated blood vessel tubes in which a rigid core material is penetrated on a high elasticity rubber sheet constituting a high elasticity layer, and the simulation is performed. The tube for blood vessels is pressed against the high elasticity rubber sheet with the core material so that they are in a state of sinking in the high elasticity rubber sheet, and the high elasticity rubber sheet and the simulated blood vessel are maintained while maintaining the state. On the tube for use, a rubber generating material is disposed so as to be joined to them, and subsequently, the rubber generating material is made into a rubber to form a low elastic rubber sheet constituting a low elastic layer, and thereafter By extracting the core material, the tube for the simulated blood vessel is pushed out to the low elasticity rubber sheet side constituting the low elasticity layer by the elasticity of the high elasticity rubber sheet constituting the high elasticity layer, and the low elasticity layer is formed. Composing low elastic rubber sheet All or part of the outer surface that corresponds to the site located in the simulated blood vessel tube and bulging state. The injection training device of the present invention can be configured in such a state that the blood vessel is raised.

  Needless to say, as the high elasticity rubber sheet, olefin rubber such as the ethylene / propylene copolymer, low density polyethylene, butyl rubber, or synthetic rubber such as polyester polyurethane, polyurethane, silicon rubber, or natural rubber, etc. Can be adopted. The rubber hardness is suitably about 35 to 60 degrees.

  Adopting a plate-like size of the above-mentioned size as the high elastic rubber sheet, and inserting it into a quadrilateral mold with a corresponding size and shape, and laying it on it, such as a metal rod One or more simulated blood vessel tubes having a rigid core material penetrated are placed. Further, the simulated blood vessel tube is pressed against the high elastic rubber sheet by using the core material, and the tube is slightly submerged in the high elastic rubber sheet, and the state is maintained.

  Thereafter, as described above, a rubber generating material is arranged on the high elasticity rubber sheet and the simulated blood vessel tube so as to be joined to them, and the rubber generating material is subsequently made rubber to reduce the elasticity. A low elasticity rubber sheet is formed to be an elastic layer. Naturally, the rubber generating material employs a material that can be satisfactorily bonded to the high elasticity rubber sheet and the simulated blood vessel tube. In many cases, it is appropriate to use the same material.

  As described above, after that, by pulling out the core material, the simulated blood vessel tube is pushed out to the low elasticity rubber sheet side by the elasticity of the high elasticity rubber sheet. In this manner, the portion of the low elasticity rubber sheet corresponding to the position where the tube is located is pressed against the simulated blood vessel tubes. By variously setting the shape of the inner surface of the upper mold of the molding die, it is possible to configure the low elastic rubber sheet to have a different thickness depending on the position. The outer surface of the tube is pushed by the simulated blood vessel tube and bulges greatly, and the thick portion bulges small.

  The rubber hardness of the low elasticity rubber sheet is about 10 to 30 degrees.

  According to the injection training device of the present invention which can be manufactured in this way, the simulated blood vessel tube is connected to a simulated blood circulation supply device for intravenous injection, intravenous drip injection, or blood collection practice. If used, the simulated blood vessel tube bulges all or part of the outer surface of the low elasticity layer corresponding to the site where it is located, just like an actual blood vessel. By searching for the position of the blood vessel from the bulging state of the surface of the base material and inserting an injection needle therethrough, it becomes possible to practice extremely effective vascular injection that approximates the case of actual injection. In addition to the position of the blood vessel, other injections such as subcutaneous injection and intramuscular injection can be usefully used for various sites.

  In addition, according to the injection training device of the present invention, as described above, a configuration in which a blood vessel is raised on the surface of the skin can be easily created.

  The simulated blood circulation supply device connects, for example, a simulated blood tank for storing simulated blood, and the simulated blood tank and the simulated blood vessel tube for circulating the simulated blood in the simulated blood tank. And a pump device that circulates the simulated blood in the simulated blood tank, the simulated blood tank, the supply tube, the simulated blood vessel tube, the supply tube, and the simulated blood tank It is. Of course, apparatuses having other configurations can also be used.

  In addition, according to the injection training device of the present invention, it is possible to easily create a configuration that approximates a human tissue, and when practicing injection, the touch stabbed with an injection needle actually stabbed the human body. There is an advantage that can be felt like a case.

  As shown in FIGS. 1 (a) to 1 (d), the injection training device of this embodiment has a high elasticity silicon rubber sheet 1 as a lower layer constituting a high elasticity layer and a low elasticity arranged in a bonded state on the upper surface thereof. The low-elasticity silicon rubber sheet 2 as an upper layer constituting the adhesive layer and the large-diameter simulated blood vessel tube 3a and the small-diameter simulated blood vessel tube 3b embedded in the low-elasticity silicon rubber sheet 2 are used. The high elasticity silicon rubber sheet 1 and the low elasticity silicon rubber sheet 2 constitute the base material 4. Similarly, the large-diameter and small-diameter simulated blood vessel tubes 3a and 3b are also tube members formed of silicon rubber.

In this embodiment, the high elasticity silicon rubber sheet 1 has a rubber hardness of 40 degrees and a thickness of about 4 mm. The rubber hardness of the low elasticity silicon rubber sheet 2 is 20 degrees, and the thickness thereof varies depending on the position as will be described later. The region with different thickness is divided into four sections, and the thickest is the region A ₁ which is about half of the region where the large-diameter simulated blood vessel tube 3a is located, and the thickness is about 4 mm, which is a little thinner than this. Is the other half area A2, and the thickness is about 3 mm. Of the region where the small-diameter simulated blood vessel tube 3b is located, the thick half region A ₃ is about 3 mm, which is approximately the same thickness as the thin region A ₂ where the large-diameter simulated blood vessel tube 3a is located. The other half area A ₄ is about 2 mm. The planar dimensions of the substrate 4 are 100 mm in length and 75 mm in width. The outer diameter of the large-diameter simulated blood vessel tube 3a is 4 mm, and the outer diameter of the small-diameter simulated blood vessel tube is 3 mm.

As described above, the high elasticity silicon rubber sheet 1 and the low elasticity silicon rubber sheet 2 constituting the high elasticity layer constitute the base material 4 in a joined state, and as a whole, as shown in FIG. The low elasticity silicon rubber sheet 2 of the upper layer is divided into four regions as described above, and the thicknesses are different as described above. The area A ₁ is about half of the embedded area of the large-diameter simulated blood vessel tube 3a. However, as shown in FIGS. 1 (a) to 1 (d), the simulated blood vessel tube 3a located here has a low elasticity. The corresponding part of the silicon rubber sheet 2 is bulged very slightly, and the area A ₂ is an embedded area of the remaining half, but as shown in the figure, the simulated blood vessel located here The tube 3a is in a state in which a corresponding portion of the low elasticity silicon rubber sheet 2 bulges relatively large. The area A ₃ is about half of the embedded area of the small-diameter simulated blood vessel tube 3b. As shown in FIGS. 1 (a) to 1 (d), the simulated blood vessel tube 3b located here has a low elasticity. The corresponding part of the silicon rubber sheet 2 is in a state of slightly bulging, and the region A ₄ is an embedded region of the remaining half, but as shown in FIG. The tube 3b is in a state in which a corresponding portion of the low elasticity silicon rubber sheet 2 bulges relatively large.

The injection training device of this embodiment can be manufactured as follows.
As shown in FIGS. 2 and 3 (a) to 3 (e), the vertical and horizontal internal dimensions as viewed from the plane are vertical: 100 mm, horizontal: 75 mm, and the lower mold k1 having a height of 12 mm by the internal method. A molding die k composed of an upper die k2 that regulates the height of the upper surface is prepared. Incidentally inner lower surface is the molding surface of the upper mold k2 does this, while set on the lower mold k1, corresponding faces to about half the area A ₁ of the buried region of the large diameter of simulated blood vessel tube 3a is The surface corresponding to the areas A ₂ and A ₃ is configured to leave a height of about 7 mm below the area A _4, and the area A ₄ is further formed in the area A ₄ . The corresponding surface is configured to leave a height of 6 mm.

  As shown in FIGS. 3 (a) and 3 (b), in the lower mold k1 of the above-described mold k, first, a high elasticity silicon rubber sheet having a rubber hardness of 40 degrees is used as a high elasticity rubber sheet constituting the high elasticity layer. 1 is installed and laid. As described above, this highly elastic silicon rubber sheet 1 has a thickness of 4 mm and a plane dimension of vertical: horizontal = 100 mm: 75 mm. After vulcanization, the rubber hardness is set to 40 degrees as described above.

  Next, after the large-diameter and small-diameter simulated blood vessel tubes 3a and 3b are passed through the metal cores s1 and s2, as shown in FIG. 2 and FIG. 1 is placed in pressure contact. As described above, the simulated blood vessel tubes 3a and 3b are silicon rubber tubes having an outer diameter of 4 mm in the former and silicon rubber tubes having an outer diameter of 3 mm in the latter. The core materials s1 and s2 are metal rods each having a corresponding diameter, the former is a linear rod body, and the latter is slightly bent (about 5) in the middle as particularly understood from FIG. ).

  As shown in FIGS. 3 (c) and 3 (d), the pressure contact is performed so that both simulated blood vessel tubes 3 a and 3 b sink into the high elasticity silicon rubber sheet 1 by about 1 mm from the upper surface thereof. When the simulated blood vessel tubes 3a and 3b are submerged as described above, the state is maintained by holding the core materials s1 and s2 in that state by a holding means (not shown).

  Thereafter, an unvulcanized silicon rubber material 12 is adopted as the rubber generating material, and the unvulcanized silicon rubber material 12 is used as a high elasticity constituting the high elasticity layer as shown in FIG. 3 (c). After placing the silicon rubber sheet 1 on the simulated blood vessel tubes 3a and 3b, which are silicon rubber tubes disposed thereon, as shown in FIG. 3 (d), the upper mold k2 is placed on the lower mold k1. The heating means (not shown) configured in the upper mold k2 is operated while the upper surface of the silicon rubber material 12 is pressure-molded.

  By the pressure molding and heating, the silicon rubber material 12 is converted into the low elasticity silicon rubber sheet 2 and at the same time, the base material 4 is formed integrally with the high elasticity silicon rubber sheet 1, and this is also used for the simulated blood vessel. The tubes 3a and 3b are also integrated with the tubes 3a and 3b. In this example, the low elasticity silicon rubber sheet 2 was set so that the rubber hardness was 20 degrees.

Thereafter, a molded injection training device is taken out of the mold k, and the metal cores s1 and s2 are extracted from the simulated blood vessel tubes 3a and 3b. Up to now, the simulated blood vessel tubes 3a and 3b are in pressure contact with the high elasticity silicon rubber sheet 1 by the core materials s1 and s2, and have been suppressed to a state where they have been depressed by more than 1 mm. However, when the core materials s1 and s2 are extracted, the simulated blood vessel tubes 3a and 3b are pushed by the elasticity of the high-elasticity silicon rubber sheet 1, and move toward the low-elasticity silicon rubber sheet 2 side, which is less elastic. In particular, in the thin regions A ₂ and A ₄ where the low elasticity silicon rubber sheet 2 is thin, the corresponding portions of the simulated blood vessel tubes 3a and 3b embedded in the corresponding positions are expanded on the surface side. The blood vessel comes out, and the blood vessel appears on the surface. Even in the regions A ₁ and A ₃ where the thickness of the low elasticity silicon rubber sheet 2 is slightly thick, slight swelling is recognized. Thus, the injection training device of this embodiment is completed.

According to this injection practice device, both ends of the simulated blood vessel tubes 3a, 3b are connected to a supply tube of a simulated blood circulation supply device (not shown) for intravenous injection, intravenous drip injection, or practice of blood collection. Can be used. As shown in FIG. 1, the simulated blood vessel tubes 3a and 3b are in a state in which the surface of the low elasticity silicon rubber sheet 2 is bulged in the regions A ₂ and A ₄ , so that the blood vessels are as if they were on the skin surface. The needle can be inserted into this region with a sense of reality, and intravenous injection, intravenous drip injection, or blood sampling practice can be performed. In the other regions A ₁ and A ₃ , as described above, since the low elasticity silicone rubber sheet 2 does not bulge out by the simulated blood vessel tubes 3a and 3b, it is difficult to find the position of the internal blood vessel. It is also convenient for practice to have such difficult parts.

  The fact that the rubber hardness of the low elasticity silicon rubber sheet 2 on the surface side is 20 degrees is very similar to the feel when the injection needle is inserted and is also convenient in that respect. .

  In addition to the above vascular injections, not only the position of the blood vessels but also various sites can be practiced such as subcutaneous injection and intramuscular injection, and can be used effectively.

  In this embodiment, the simulated blood circulation / supply apparatus is the following apparatus (not shown). That is, a simulated blood tank for storing simulated blood and a supply for connecting the simulated blood tank and both ends of the simulated blood vessel tubes 3a and 3a in order to flow and circulate the simulated blood in the simulated blood tank An apparatus comprising a tube, and simulated blood in the simulated blood tank, the simulated blood tank, a supply tube, simulated blood vessel tubes 3a and 3b, a supply tube, and a pump device for circulating the simulated blood tank. It is.

1 High elasticity silicone rubber sheet 2 Low elasticity silicone rubber sheet 3a Large diameter simulated blood vessel tube 3b Small diameter simulated blood vessel tube 4 Base material 12 Silicon rubber material A ₁ Half area where large diameter simulated blood vessel tube is located A ₂ The other half area where the large diameter simulated blood vessel tube is located A ₃ The half area where the small diameter simulated blood vessel tube is located A _{4 The} other half area where the small diameter simulated blood vessel tube is located k Molding die k1 Bottom Type k2 Upper type s1, s2 Core material

Claims (4)

A substrate comprising a high elasticity layer and a low elasticity layer bonded to one surface of the high elasticity layer;
Embedded in the base material, both ends projecting from the end of the base material, and the portion in contact with the high-elastic layer on the circumferential side is pushed to the low-elastic layer side by the elasticity of the high-elastic layer, A tube for a simulated blood vessel arranged to push all or part of the portion of the low elasticity layer that is in contact with the portion on the opposite side of the peripheral side so that the outer surface of the low elasticity layer is in an expanded state;
An injection practice device composed of   The injection training device according to claim 1, wherein the high elasticity layer is made of a rubber material having a rubber hardness of 35 to 60 degrees, and the low elasticity layer is made of a rubber material having a rubber hardness of 10 to 30 degrees.   One or more simulated blood vessel tubes in which a rigid core material is penetrated are placed on a high elasticity rubber sheet constituting the high elasticity layer, and the simulated blood vessel tubes are placed in the high elasticity rubber sheet. The core material is pressed against the high elasticity rubber sheet so as to be in a sunk state, and while maintaining the state, the high elasticity rubber sheet and the simulated blood vessel tube are joined to them. The low elasticity rubber sheet constituting the low elasticity layer is formed by arranging the rubber generating material and subsequently converting the rubber generating material into a rubber, and then the core material is removed to constitute the high elasticity layer. The simulated blood vessel tube of the low elasticity rubber sheet constituting the low elasticity layer is formed by pushing the simulated blood vessel tube toward the low elasticity rubber sheet side constituting the low elasticity layer by the elasticity of the high elasticity rubber sheet. Location of where Corresponding to produce all or a portion of the injection practice device of as a bulged state claim 1 of the outer surface, the production method of the injection practice device. As the high elasticity rubber sheet constituting the high elasticity layer, a rubber hardness of 35 to 60 degrees, a quadrilateral vulcanized silicon rubber sheet is adopted, and the vulcanized silicon rubber sheet is quadrilateral in plan view. Placed in the mold,
As the simulated blood vessel tube, one or more silicon rubber tubes are adopted, and the silicon rubber tubes are placed in a pressed state on the highly elastic silicon rubber sheet after passing through a metal core material. The silicon rubber tube is sunk in the high elasticity silicon rubber sheet,
As the rubber generating material, an unvulcanized silicon rubber material is employed, and the unvulcanized silicon rubber material is a high elasticity silicon rubber sheet constituting the high elasticity layer and a silicon rubber tube disposed thereon. The silicon rubber material is heated and pressurized from above to form a low elasticity silicon rubber sheet having a rubber hardness of 10 to 30 degrees to form a low elasticity layer, and then the silicon rubber tube A low elasticity corresponding to the position where the silicon rubber tube is located by extracting the metal core material from the core and extruding the silicon rubber tube with the elasticity of the high elasticity silicon rubber sheet constituting the high elasticity layer The manufacturing method of the injection training device of Claim 3 which makes the whole or a part of the outer surface of the low elastic silicone rubber sheet which comprises a property layer swell.

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