JP7309206B2 - Simulated blood vessels for injection practice - Google Patents

Description

The present invention provides medical personnel such as doctors, nurses, midwives, public health nurses, clinical laboratory technologists, paramedics, nursing students, and other medical personnel to practice and practice various procedures related to injections, in a state that is close to the feeling of an actual injection. This invention relates to a simulated blood vessel for training to reproduce and improve the training effect.

Injection is an essential technique for medical personnel, and lack of skill immediately causes pain to the patient. However, the improvement of injection techniques has hitherto largely depended on the accumulation of experience of individual medical personnel, making it difficult to conduct effective training.

In Patent Document 1, a simulated blood vessel is placed on a simulated subcutaneous tissue layer attached to a mounting body, the simulated subcutaneous tissue layer and the simulated blood vessel are covered with a simulated skin layer, and the mounting body is worn on the arm to perform an actual injection. Disclosed is an injection practice tool that reproduces a state close to sensation. The simulated blood vessel is formed by connecting one end to a simulated blood bag storing simulated blood.

JP 2019-152770 A

In the injection practice device of Patent Document 1, the simulated blood vessel and the simulated blood bag are in a closed state, so blood collection practice of extracting the simulated blood can be performed, but drug solutions such as drip administration and saline solution can be added to the simulated blood vessel. It is difficult to practice the procedures associated with the administration of Injection practice, in addition to blood collection practice, was desired to be able to selectively administer administration practice. Furthermore, it is necessary to practice using blood vessels with different diameters (thicknesses) for the simulated blood bag, and various forms of training have been required. Molding them separately would increase the cost, and there has been a demand for a simulated blood vessel and an injection training tool that can be used in a variety of training modes with a single member.

Furthermore, the simulated blood vessel is based on the premise that the simulated blood bag is used by pressing the simulated blood bag in preparation for the injection practice tool, and if the member that connects the simulated blood vessel and the simulated blood bag becomes large, it becomes an obstacle to performing appropriate pressing. Therefore, there has been a demand for a connection form that is as compact as possible.

Therefore, the present invention aims to reduce the manufacturing cost by suppressing the number of parts while allowing injection practice in various modes, and furthermore, the simulated blood bag is miniaturized so as not to hinder the pressing of the simulated blood bag. The purpose is to provide blood vessels.

The simulated blood vessel of the present invention comprises a simulated blood bag filled with simulated blood and a tubular vascular portion connected by a connecting and fixing portion. a simulated blood vessel for injection training, wherein the connecting and fixing part has an adapter attached to one end of the blood vessel part, and a connector that encloses the adapter and is connected to and fixed to the simulated blood bag. The adapter has an outer cylinder, an inner cylinder, and a space between the outer cylinder and the inner cylinder for connecting an open end, which is one end of the blood vessel, and the connector includes the adapter. It is characterized by having a protruding locking portion that tightens the holding state of the adapter and the blood vessel portion in a state.

Further, the simulated blood bag has an outflow tube that is fixed and connected to the connector of the connection fixing part, and the adapter has an adapter proximal end portion having an inclined surface for positioning the inserted state in the outflow tube; It has an outer cylinder extending further in the distal direction from the distal end position of the base end of the adapter, and an inner cylinder. The tube has a tapered shape that tapers from the proximal end to the distal end, and the connector is a cap-like shape having an outer wall that is screwed to the outflow tube and a bottom, and a through hole for leading out a blood vessel part at the bottom. and a protruding locking portion taperingly protruding from the bottom portion, and when the connector is fixed to the outflow tube in a state where the connector encloses the adapter, the protruding locking portion engages the outflow tube. and the surface of the barrel to clamp the barrel inward.

In addition, the outflow tube of the simulated blood bag has a locking portion having a ridge shape protruding from the surface of the outflow tube on the proximal end side of the threaded portion, and the connector has a recessed proximal edge of the outer wall. It is preferable that the connector has a locked portion, and that the protruding locking portion is located in the recess of the locked portion when the connector is completely screwed into the simulated blood bag and fixed.

In addition, a simulated blood bag filled with simulated blood and one end of a tubular blood vessel are connected by a connecting and fixing part, and the other end of the blood vessel is connected to a discharge cylindrical object by a discharge connection part. wherein the discharge connecting part comprises a second adapter attached to the other end of the blood vessel part, and a second connector enclosing the second adapter and connected and fixed to the discharge tube. The second adapter comprises an adapter proximal end portion having an inclined surface, an outer cylinder extending from a tip position of the adapter proximal end portion, an inner cylinder, and a space between the outer cylinder and the inner cylinder. and a space connecting the open ends of the blood vessel, wherein the outer cylinder has a plurality of slits divided in the circumferential direction, and each divided outer cylinder tapers from the proximal end to the distal end. The second connector has a cap-like shape having an outer wall screwed to the discharge tube and a bottom portion, the bottom portion having a through hole for leading out the blood vessel portion, and a taper from the bottom portion. and a protruding locking portion protruding in a shape, and in a state where the second connector encloses the second adapter, the protruding locking portion is located on the inner surface of the discharge tubular article and the surface of the outer cylinder. It is preferable that the attached state between the second adapter and the blood vessel portion is maintained by inserting the outer tube between and tightening the outer cylinder inward.

Further, the intermediate connecting member, which is a tubular discharge member connected to the discharge connecting portion, and a connecting member further connected to the intermediate connecting member, the intermediate connecting member has an interior thereof serving as a discharge flow path, and the discharge flow path is provided. a shielding valve for blocking a passage, a threaded portion for connecting with a second connector of the discharge connection, and a threaded portion for connecting with the connecting member, the connecting member breaking through the shielding valve It has a communication needle that irreversibly switches from a closed state to an open state, and the communication needle is composed of a cylindrical portion having a communication channel therein and a conical needle tip protruding from the tip of the cylindrical portion, It is preferable that the needle tip has an opening for the communication channel on its peripheral surface.

According to the invention described in claim 1, it is possible to connect blood vessels of different diameters to the adapter and use them by connecting them to a common connector, so that blood vessel parts of different diameters can be used as a common member. become. Furthermore, by enclosing the adapter attached to one end of the blood vessel part and connecting and fixing the connector to the simulated blood bag, it is possible to reduce the size of the connecting part for connecting different diameters.

According to the second aspect of the invention, the blood vessel can be firmly held by the adapter tightening and fixing the blood vessel by inserting the protruding locking portion of the connector. Since this tightening involves inserting the protruding locking portion tapered toward the base end into the outside of the outer cylinder tapered toward the distal side, the insertion of the protruding locking portion is easier, and the vascular part is easier to hold.

According to the third aspect of the invention, at the position where the screwing of the connector is completed, the ridge (projection) of the locking portion of the outflow tube is positioned in the recess of the locked portion of the connector, and the connector is unexpectedly broken. can be prevented from rotating.

According to the fourth aspect of the invention, even if an excessive amount of drug solution or the like is administered to the blood vessel, it will be discharged into the waste liquid container. It is possible to conduct administration training such as infusion administration that is close to the actual practice. Furthermore, the cost can be reduced by using the adapter and the connector as common parts.

According to the fifth aspect of the invention, a simulated blood vessel capable of switching between a closed state and an open state can be provided by having an intermediate connection member and a communication member that are communicated by the communication needle piercing the shield valve. , the closed state and the open state can be achieved by a simple means of rotating the connecting member.

1 is a perspective view of a simulated blood vessel according to an embodiment of the present invention; FIG. It is an exploded plan view of the simulated blood vessel, showing the simulated blood bag, the adapter and the connector in the upper part, and the blood vessel part in the lower part. Fig. 3 is an enlarged vertical cross-sectional view in which the connecting and fixing part is exploded, in which (a) is the connecting and fixing part normally used for the blood vessel part, and (b) is the connecting and fixing part used for the small blood vessel part. Fig. 3(a) is an explanatory view of the operation of the connecting and fixing part, in which (a) is the state immediately before the adapter is attached to the blood vessel and connected to the connector, and (b) is the state in which the adapter is connected and fixed to the connector. . FIG. 4 is an illustration of a simulated blood vessel fitted with a discharge connection and a waste container. Fig. 10 is an enlarged plan view of the discharge connecting part exploded, in which (a) shows the blood vessel part, the second adapter and the second connector, and (b) shows the intermediate connecting member and the connecting member; 4 is an enlarged vertical cross-sectional view of the discharge connection; FIG. It is an explanatory view of the operation of the intermediate connection member and the connection connection member, (a) is the initial state closed by the shield valve, and (b) is the state in which the shield valve is broken to release the blockage. 1 is an overall perspective view of a state in which a simulated blood vessel of the present invention is provided in an injection practice device; FIG. FIG. 10 is a perspective view of a state in which the mounting body is removed from the deck and the simulated blood vessel is also removed from FIG. 9; 1 is a perspective view showing a conventional simulated blood vessel used in the injection practice device of the present invention; FIG. FIG. 4 is a partially enlarged perspective view showing a base end support portion of the mounting body; FIG. 10 is a partially enlarged side view of the central base end support portion as seen from the rear, in which (a) is a state where a conventional simulated blood vessel is attached, and (b) is a state where a new simulated blood vessel is attached. FIG. 4 is a rear end view of the upright piece at the rear end of the mounting body as seen from the rear; It is a partial expansion perspective view which shows the cut-out part of the attachment main body rear.

An embodiment of a simulated blood vessel according to the present invention will be described below with reference to the accompanying drawings. In this description, the left side of the drawing (for example, the simulated blood bag side in FIG. 2) is defined as the base end side, and the right side of the drawing (for example, the blood vessel side in FIG. 2) is defined as the distal end side.

As shown in FIG. 1, the simulated blood vessel 1 includes a simulated blood bag 2 that stores simulated blood, a cylindrical, tubular, and elongated blood vessel portion 3 that simulates a blood vessel, and the simulated blood bag 2 and the blood vessel portion 3. It consists of a connection fixing part 4 that is connected and fixed. Although not shown, the simulated blood is a red-colored liquid that gives a sense of realism. Note that the simulated blood vessel 1 is a so-called disposable material that is discarded when used.

As shown in FIG. 2, the connecting/fixing part 4 of the simulated blood vessel 1 is composed of an adapter 5 and a connector 6. After connecting the blood vessel part 3 to the adapter 5, the adapter 5 is enclosed in the connector 6 to form a simulated blood bag. 2, the simulated blood bag 2 and the blood vessel part 3 are connected and fixed in a state of being communicated within the simulated blood vessel 1. - 特許庁The blood vessel part 3 is molded from a soft resin, and the adapter 5 and the connector 6 are also molded from a resin material.

The simulated blood bag 2 of the simulated blood vessel 1 will be described. The simulated blood bag 2 comprises a hollow rectangular reservoir 10 and a cylindrical outflow tube 11 projecting from one surface of the reservoir 10 . The outflow tube 11 has an annular receiving portion 12 protruding inward from the inner periphery on the proximal end side (see FIG. 3). The receiving portion 12 receives and engages an adapter 5, which will be described later, to position and fix it in the axial direction.

On the outer circumference of the outflow cylinder 11, there are a threaded portion 13 projecting for fixing to a connector 6, which will be described later, and two projections extending downward from the center lower end of the storage portion 10, which is the base end side of the threaded portion 13. It has locking portions 14 , 14 . The locking portions 14, 14 are located on the front surface and the back surface of the outflow tube 11, and are arranged circumferentially at 180 degrees apart. When the connector 6 is completely fixed (screwed) to the outflow tube 11, the locking portions 14, 14 are fitted into and engaged with the locked portions 35, 35 of the connector 6, thereby screwing the connector 6. is stopped, and the connector 6 is locked in the locked state so as not to rotate unexpectedly.

By connecting and fixing the simulated blood bag 2 and the blood vessel part 3 , the insides of the storage part 10 and the blood vessel part 3 are communicated with each other, and the simulated blood can be supplied from the storage part 10 into the blood vessel part 3 . The simulated blood bag 2 stores simulated blood in a negative pressure state on the positive pressure side of the vacuum blood collection tube, and while making it possible to supply the simulated blood to the vacuum blood collection tube, leakage from the needle hole generated in the blood vessel part 3 due to blood collection, etc. is suppressed.

The blood vessel portion 3 will be described. The blood vessel part 3 is a tubular body having a predetermined length and having a proximal end portion 3a that opens on the proximal end side in the longitudinal direction and a distal end portion 3b that closes the other end side, and the proximal end portion 3a is connected and fixed. The device 4 connects to the simulated blood bag 2 . The blood vessel part 3 is made of a soft material such as an elastomer into which an injection needle or a drip needle can be pierced multiple times, and is bent in a free-form curve to simulate blood vessels with individual differences. The vascular portion 3 has a thin radial thickness (half the difference between the inner diameter and the outer diameter) of about 0.4 mm.

The connecting/fixing part 4 will be described. As described above, the connecting/fixing part 4 is composed of the adapter 5 for attaching and holding the blood vessel part 3 and the connector 6 for connecting and holding the adapter 5 to the outflow tube 11 by screwing it. The connecting/fixing part 4 irreversibly fixes the blood vessel part 3 to the simulated blood bag 2 by this connection, and the insides thereof are communicated with each other to form a flow path for the simulated blood.

The adapter 5 will be explained. As shown in FIGS. 2, 3, and 4, the adapter 5 has a double-cylinder structure with an outer cylinder 21 and an inner cylinder 22 having an open front end surface. The adapter 5 has a space between the two tubes 21 and 22 into which the proximal end portion 3a of the blood vessel portion 3 is inserted and held. The radial thickness of this space (half the difference between the inner diameter and the outer diameter) is larger than the thickness of the blood vessel portion 3 and is about 0.44 mm. The inner circumference of the inner tube 22 has a longitudinal space with both ends opened, and serves as a flow path that communicates the outflow tube 11 and the blood vessel portion 3 .

The adapter 5 has an adapter proximal end portion 23 which is located at a proximal side position and is inclined toward the outer periphery. An extended outer cylinder 21 is formed. The outer cylinder 21 has a tapered shape in which the thickness gradually decreases from the adapter proximal end 23 side to the distal end side, and is divided in the circumferential direction to form a plurality of slits 24 , 24 .

When the adapter 5 is inserted into the outflow cylinder 11 of the simulated blood bag 2, the adapter proximal end 23 formed in a conical cylindrical shape with an inclined surface engages the receiving part 12 protruding into the outflow cylinder 11, Moreover, by biting, the adapter 5 is positioned and fixed in the axial direction (longitudinal direction). As will be described later, by fixing (screwing) the connector 6 to the outflow tube 11 of the simulated blood bag 2, the outer tube 21 of the adapter 5 gradually moves the proximal end portion 3a of the blood vessel portion 3. Tighten and secure.

In the present embodiment, as shown in FIG. 3A, a blood vessel 3 simulating a normal blood vessel is used as the blood vessel 3, but a blood vessel having a diameter different from that of the normal blood vessel 3 can be used. . FIG. 3(b) shows a small blood vessel portion 15 that is thinner than the blood vessel portion 3 and simulates a small blood vessel. The inner diameter (inner diameter) of the normal blood vessel portion 3 is set to 1.5 mm, and the inner diameter of the small blood vessel portion 15 is set to 1.3 mm. The adapter also has an adapter 5 used for the normal blood vessel 3 and a thin adapter 5 a for holding the small blood vessel 15 .

The thin adapter 5 a has an outer cylinder 21 with a smaller inner diameter than the adapter 5 and an inner cylinder 22 with a larger outer diameter than the adapter 5 , matching the size of the small blood vessel portion 15 . The thin adapter 5a has the outer diameter of the outer cylinder 21 and the shape and dimensions of the base end portion 23 of the adapter the same as those of the normal adapter 5, so that the connector 6 and the outflow tube 11 (simulated blood bag 2) can be attached. It is possible to hold. In addition to the normal vascular portion 3 and fine vascular portion 15, vascular portions with different diameters such as thinner vascular portions and thick vascular portions can be used.

Next, the connector 6 will be explained. The connector 6, as shown in FIGS. 2, 3 and 4, has a cylindrical box-like (cap-like) shape consisting of an outer wall 31 and a bottom 32. As shown in FIG. The outer wall 31 has a threaded portion 31a protruding toward the center from the inner surface thereof, and is a nut-like member that is screwed into and engaged with the threaded portion 13 of the outflow tube 11 of the simulated blood bag 2 . The disk-shaped bottom portion 32 is open at the center and has a through hole 33 through which the blood vessel portion 3 is inserted. The connector 6 has a nut-shaped outer wall 31 screwed to the threaded portion 13 of the outflow tube 11, and includes the adapter 5 holding the proximal end portion 3a of the blood vessel portion 3 in the inner space of the outer wall 31. The blood vessel portion 3 is led out through the hole 33 .

A protruding locking portion 34 is formed extending inwardly of the outer wall 31 from the periphery of the through hole 33 of the connector 6, in other words, protruding from the distal side toward the proximal side. The projecting locking portion 34 has a tapered shape in which the thickness gradually decreases from the distal end side to the proximal end side. It is an inclined surface that inclines toward

The protruding engaging portion 34 is formed at the edge of the through hole 33 of the bottom portion 32 and protrudes toward the internal space of the outer wall 31 along the axial direction. The projecting locking portion 34 has a tapered cylindrical shape, and the connector 6 is screwed into the outflow tube 11 of the simulated blood bag 2 while the adapter 5 with the blood vessel portion 3 attached thereto is inserted into the outflow tube 11 of the simulated blood bag 2 . As it goes on, it is inserted between the outer cylinder 21 of the adapter 5 and the inner peripheral surface of the outflow cylinder 11 from the tip of the tapered protruding engaging portion 34 . The outer cylinder 21 of the adapter 5 is gradually pressed against the proximal end portion 3a of the blood vessel portion 3 by inserting the protruding locking portion 34 gradually thickened from the proximal end side to the distal end side as the connector 6 is screwed in. , the holding state of the blood vessel portion 3 by the adapter 5 is strengthened.

The outer wall 31 of the connector 6 has two recessed portions corresponding to the two engaging portions 14, 14 formed on the simulated blood bag 2 at the edges opposite to the bottom portion 32. Stop portions 35, 35 are formed. The recessed shape of the locked portions 35, 35 is such that the locking portions 14, 14 of the ridges are positioned in the recessed portions when the connector 6 is screwed into the outflow tube 11 of the simulated blood bag 2 to the deepest position. , it is positioned and fixed at the screwing completion position. In addition, when the connector 6 rotates unexpectedly due to this engagement, the engaging portions 14, 14 of the projections contact the recessed engaging portions 35, 35 of the connector 6, thereby preventing the connector 6 from loosening.

As described above, the simulated blood bag 2 and the blood vessel portion 3 can be connected and fixed by the connecting/fixing portion 4 composed of the adapter 5 and the connector 6 of the simulated blood vessel 1 . Since blood vessels with different diameters can be used, training can be performed with simulated blood vessels of various diameters. Furthermore, the connector 6 and the simulated blood bag 2 (outflow cylinder 11) are used as common parts, and the number of parts can be reduced. The size can be reduced so as not to interfere with pressing the simulated blood bag 2 or training.

Next, a simulated blood vessel 1 (second embodiment) that can be used for administration practice in addition to blood collection practice in addition to the above-described connecting and fixing portion 4 will be described. In the second embodiment, the adapter 5 and the connector 6 used in the first embodiment are arranged at the distal end portion 3b of the simulated blood vessel 1 to practice administration such as infusion, and the adapter and the connector are shared. It is possible to reduce the number of parts by using the same.

A simulated blood vessel 1 (first embodiment) shown in FIG. 1 is connected to a simulated blood bag 2 at a proximal end portion by a connection fixing portion 4, and a distal end portion 3b is closed. On the other hand, as shown in FIG. 5, in the simulated blood vessel 1 of the second embodiment, the end of the distal end portion 3b is opened in the same manner as the proximal end portion 3a (see FIG. 6), and the blood vessel portion 3 is formed into a penetrating tubular shape. forming and mounting the discharge connection 7 . The discharge connection part 7 of the second embodiment has an intermediate connection member 8 and a connection member 9 attached thereto, one end of a waste liquid tube 43 is connected to the connection member 9, and an external waste liquid container 41 is connected to the other end of the waste liquid tube 43. Thus, the drug solution or the like administered to the blood vessel portion 3 can be discharged to the waste liquid container 41 .

5, 6 and 7, the discharge connection part 7 consists of a second adapter 45 and a second connector 46. The second adapter 45 has a form common to the first adapter 5. , the second connector 46 has a configuration in common with the first connector 6 . It is preferable to connect the waste liquid tube 43 via the intermediate connection member 8 screwed to the second connector 46 and the connection member 9 that connects the intermediate connection member 8, but the discharge connection portion 7 (the second connector 46 ) directly to the waste liquid container 41 .

The second adapter 45 has the same shape as the first adapter 5 and is used as a common component. As with the first adapter 5 , an outer cylinder 51 , an inner cylinder 52 , an adapter proximal end portion 53 , and slits 54 , 54 are formed. hold.

The second connector 46 has the same shape as the first connector 6 and is used as a common component. As in the first connector, an outer wall 61, a threaded portion 61a, a bottom portion 62, a through hole 63, a protruding locking portion 64, and recessed locked portions 65, 65 are formed. It is also the same that the protruding locking portions 64, 64 tighten the outer cylinder 61 inwardly when the outer cylinder 61 is screwed into the outer cylinder.

The intermediate connection member 8 will be explained. As shown in FIGS. 6 and 7, the intermediate connection member 8 includes an inflow tube 71 having the same shape and dimensions as the outflow tube 11, and a cylindrical discharge portion 72 located on the distal end side of the inflow tube 71 and communicating with the inside thereof. and have The intermediate connection member 8 has an internal space penetrating through the center of the member in the longitudinal direction, and serves as a waste liquid discharge flow path 73 that communicates with the blood vessel portion 3 .

The inflow tube 71 has a threaded portion 74 having a screw thread formed on its outer periphery. A flange 72a, which is a part of the ejection portion 72, has locking portions 75, 75 projecting upward along the longitudinal direction on the front and back surfaces of a flange 72a, which is a part of the discharge portion 72, which will be described later. have. These shapes and dimensions are the same as those of the threaded portion 13, locking portions 14, 14, and receiving portion 12 of the outflow tube 11 of the simulated blood bag 2. As shown in FIG.

The inflow tube 71 is positioned and fixed by the receiving portion 76 in a state in which the second adapter 45 holding the blood vessel portion 3 is inserted. Furthermore, the second connector 46 can be screwed until it reaches the recessed positions of the recessed locked portions 65, 65 of the second connector 46 and is locked by the locking portions 75, 75 of the ridges. By engaging the locking portions 75, 75 with the locked portions 65, 65 of the second connector 46, it is possible to prevent the second connector 46 from loosening due to unexpected rotation or the like. It becomes the same as the first connector 6 .

The discharge portion 72 of the intermediate connection member 8 has a cylindrical shape concentric with the inflow tube 71 and protrudes toward the opposite side of the inflow tube 71 in the longitudinal direction. The base end portion of the inflow tube 71 is composed of a brim 72a protruding outward in a regular hexagonal plate shape, a base 72b cylindrically protruding from the brim 72a, and a cylindrical connecting tube 72c further protruding from the tip of the base 72b. The connecting tube 72c has a threaded portion 72f formed of threads on its surface, and has the same outer diameter as that of the inflow tube 71. As shown in FIG.

The tip of the base portion 72b (the end on the side of the connecting cylinder 72c) has an outwardly protruding annular convex portion 72d. is formed to protrude. The intermediate locking portions 72e, 72e are formed on the front and back surfaces and are spaced apart by 180 degrees on the circumference.

The intermediate connection member 8 is formed with a discharge passage 73 passing through the center of the member in the longitudinal direction from the inflow tube 71 to the discharge portion 72 , but the discharge passage 73 is blocked inside near the tip of the discharge portion 72 . A membrane isolation valve 77 is placed (see FIG. 7). With this shielding valve 77, the closed state of the distal end portion 3b of the blood vessel portion 3 can be maintained unless the connecting member 9 is screwed into the intermediate connecting member 8 to the completion position.

Next, the connecting member 9 will be described. As shown in FIGS. 6 and 7, the connecting member 9 has a cylindrical box-like (cap-like) shape consisting of an outer wall 81 and a bottom portion 82 . The outer wall 81 has a threaded portion 81a protruding toward the center from the inner surface thereof, and is a nut-like member that is screwed into and engaged with the threaded portion 72f of the discharge portion 72 of the intermediate connection member 8. As shown in FIG.

The outer wall 81 is formed by partially recessing the edge opposite to the bottom portion 82, and has two locked portions at positions corresponding to the intermediate locking portions 72e, 72e formed on the flange 72a of the intermediate connecting member 8. 83, 83 are formed. The locking portions 83, 83 prevent the connecting member 9 from rotating unexpectedly, and the screwed state can be continued. In addition, the edge of the outer wall 81 opposite to the bottom 82 is formed with a retainer protrusion 84 that protrudes from the peripheral edge toward the inner surface side, engages with the annular protrusion 72d of the intermediate connection member 8, and is held within a certain range or more. I'm trying not to get out.

The connecting member 9 includes a connecting needle 85 protruding in a needle shape from the center of the circle of the bottom portion 82 toward the inside of the outer wall 81, and a joint pipe protruding from the center of the circle of the bottom portion 82 to the opposite side of the communicating needle 85. A portion 86 is provided. The communication needle 85 has a cylindrical portion having a discharge channel 87 as a communication channel inside and a conical needle tip protruding from the tip thereof. A discharge channel 87 is formed to communicate with the . The joint tube part 86 is a member with a barbed tip, and can be connected by inserting it into the tube of the waste liquid tube 43 .

As the connecting member 9 is screwed into the intermediate connecting member 8 , the communicating needle 85 protruding inwardly of the connecting member 9 enters the discharge channel 73 of the intermediate connecting member 8 . As the screwing continues, the needle tip of the communication needle 85 breaks through the shield valve 77 blocking the discharge flow path 73 of the intermediate connection member 8 described above. In this state, the liquid discharged from the discharge channel 73 of the intermediate connection member 8 flows into the discharge channel 87 of the connection member 9 through the opening 85a formed in the communication needle 85, and the tip of the joint pipe portion 86 is discharged from the opening 86a.

As described above, the simulated blood vessel 1 of the second embodiment is directly connected to the waste liquid container 41 by arranging the discharge connecting part 7 consisting of the second adapter 45 and the second connector 46 at the distal end portion 3b. Furthermore, by connecting the intermediate connecting member 8 and the connecting member 9, it is possible to easily switch between the closed state and the discharged state. That is, when the intermediate connection member 8 is connected to the discharge connection portion 7 and the intermediate connection member 8 and the coupling member 9 are not completely screwed together and left in a loosened state, the shield valve 77 formed in the intermediate connection member 8 As a result, the simulated blood vessel 1 is shielded on the distal end side. When the connecting member 9 is screwed into the intermediate connecting member 8 from this state, as described above, the communicating needle 85 breaks through the shield valve 77, and the waste liquid flows from the joint tube portion 86 to the waste liquid container 41 via the waste liquid tube 43. to discharge. In this way, it is possible to switch between them only by the operation of screwing. In this way, it is possible to easily switch between the blood collection training performed in the closed state and the administration training performed in the drained state.

An embodiment of an injection training device that can use a new simulated blood vessel 1 according to the present invention will be described below with reference to the accompanying drawings. In this description, the longitudinal direction of the mounting body 101 is defined as the front-rear direction, the left rear side in FIG. 9 is defined as the front side or proximal end side, and the right front side is defined as the rear side or distal end side. Also, the direction orthogonal to the longitudinal direction of the mounting body 101 is described as the width direction or the lateral direction.

As shown in FIGS. 9 and 10, the basic configuration of the injection training device according to the present invention includes an attachment body 101, a simulated subcutaneous tissue layer 102 disposed on the upper surface of the attachment body 101, and an upper portion of the simulated subcutaneous tissue layer 102. and an upper cover 105 on which a simulated skin layer 104 is stretched. A simulated blood vessel 1, 161 is arranged on the simulated subcutaneous tissue layer 102 (see FIGS. 1 and 11), and an upper cover 105 is put on the simulated blood vessel 1, 161 to find the simulated blood vessel 1, 161 from the simulated skin tissue layer 104 to perform injection practice. .

First, the mounting body 101 of the injection training device will be described. The mounting main body 101 is a generally plate-shaped body made of hard resin that is curved into a projecting arc shape or an arch shape as a whole. As shown in FIG. 10 , the inner side of the mounting body 101 , which has a projecting arc shape and an arch shape, is open, and the open inner portion serves as an arm loop portion 142 . The mounting body 101 can be placed on a table while being mounted on the deck 140 as shown in FIG. 9, but as shown in FIG. The arm loop portion 142 can also be used by wrapping it around the arm of the pseudo user.

When used by being wrapped around the arm of the dummy user, the mounting body 101 is removed from the deck shown in FIG. The mounting body 101 is mounted between the elbow joint of the arm and the wrist by wrapping the arm through part 142 around the arm. Then, in a state of being worn on the arm, the injection needle can be inserted into the simulated blood vessel 1 from the surface (upper surface) of the simulated skin layer 104 of the upper cover 105 to practice blood vessel injection. By attaching it to the arm of the pseudo-employee, it is possible to imitate a blood vessel injection into the arm of the pseudo-employee facing the face-to-face, and it is possible to reproduce the individual differences of the pseudo-employee and the realism of the face-to-face implementation.

A configuration of the mounting body 101 will be described. As shown in FIGS. 9 and 10, the mounting body 101 is made of a hard synthetic resin material such as ABS resin, and is molded in a projecting arc shape and an arch shape as a whole by curving the center portion in the width direction into a projecting arc shape. By using a hard material in this way, it is possible not only to prevent the injection needle from penetrating the mounting body 101 when the practitioner uses it by mistake, but also to remove the simulated skin layer 104, the simulated subcutaneous tissue layer 102, and the like. Since the entire body and appearance are molded from a hard material, even inexperienced injection practitioners can use it with confidence.

The mounting body 101 has upright pieces 131, 131 at both front and rear ends in the longitudinal direction. The surface of the mounting body 101 has two bending grooves 132 , 132 as curvature changing means along the longitudinal direction from the front standing piece 131 to the rear standing piece 131 . Notches 133, 133 are formed at positions of the front and rear standing pieces 131, 131 corresponding to the bending grooves 132, 132, so that the arch form of the arch-shaped mounting body 101 can be widened or narrowed. can. This makes it possible to adjust the width, the curved state, and the arched state of the mounting body 101 according to the thickness of the arm of the simulated wearer.

As shown in FIGS. 9 and 10, the attachment body 1 has a plurality of bag placement portions 111, 111 for placing the simulated blood bag 2 of the simulated blood vessel 1 behind the front upright piece 131 arranged in the width direction. A connecting portion 64, which is a proximal portion of the conventional and new simulated blood vessels 1, 161, and a proximal support portion 106 for accommodating the connecting and fixing portion 4 are provided on the side, and a simulated hypodermis formed in a projecting plane shape behind it. The tissue layer 102 is arranged, and the rear upright piece 131 is arranged behind it.

The simulated subcutaneous tissue layer 102 is an arc-shaped body that matches the curved shape of the upper surface of the attachment body 101, reproduces the feel of the subcutaneous tissue, and has low resilience in order to withstand the deformation of the curved shape of the attachment body 101. made of elastic foam. The low-resilience foam material is, for example, low-foam urethane, and memory foam (registered trademark) is preferable. The simulated subcutaneous tissue layer 102 is detachable, and its plane extends to the vicinity of the upper edge of the standing piece 131 .

Next, the upper cover 105 on which the simulated skin layer 104 is stretched will be described. A simulated skin layer 104 covering the upper side of the simulated subcutaneous tissue layer 102 is stretched over an upper cover 105 arranged on the upper surface of the mounting body 101 . The upper cover 105 is formed in an arch shape that matches the curved shape of the upper surface of the mounting body 101, the central portion of which is excised, and the simulated skin layer 104 is stretched. A presser 108 is formed on the front side of the upper cover 105, and a presser connecting portion 107 is formed between the upper cover 105 and the presser 108 with both sides in the width direction open. When the upper cover 105 is closed, the presser foot 108 is positioned above bag placement portions 111 , 111 to be described later, and the presser foot connecting portion 107 is positioned above the base end support portion 106 .

By forming the simulated skin layer 104 with a urethane-based material, unlike the case where the simulated skin layer 104 is formed with a silicone-based material, the drying state (wetness) of the disinfectant alcohol can be visually confirmed, and the dryness (wetness) of the disinfecting alcohol can be visually confirmed. Injection can be prevented. In addition, by using a urethane-based microcell polymer sheet, it is possible to confirm an undisinfected state from the swelling caused by alcohol.

The upper cover 105 has engaging claws 134 formed on the sides thereof as fixing means to the mounting body 101 at the side edge portions in the longitudinal direction. On the other hand, a locked portion 135 is formed on the mounting body 101 , and by engaging these portions, the upper cover 105 can be detachably mounted on the mounting body 101 .

Next, a simulated blood vessel to be arranged on the mounting body 101 will be described. As shown in FIG. 11, a conventional simulated blood vessel 161 is formed by connecting and fixing a blood vessel portion 163 and a simulated blood bag 162 with a connecting portion 164, and is supplied as a disposable product. The simulated blood bag 162 contains simulated blood in an upper-shaped bag in the drawing, and the proximal end portion of this bag 162 and the proximal end portion 163 a of the simulated blood vessel 161 are connected by a cylindrical connecting portion 64 . . The blood vessel portion 163 uses a tubular tube made of natural rubber or the like, and the connecting portion 164 uses a resin molding having approximately the same thickness (diameter) as the blood vessel portion 163 .

The new simulated blood vessel 1 of the present invention connects a blood vessel portion 3 and a simulated blood bag 2 with a connection fixing portion 4 as shown in FIG. As described above, the connecting and fixing part 4 is formed by disposing the adapter 5 at the proximal end portion 3a of the blood vessel part 3 and screwing the adapter 5 to the outflow tube 11 of the simulated blood bag 2, as shown in FIG. are connected and held by the connector 6. Since the connector 6 is connected so as to include the adapter 5, its thickness and outer diameter are larger than those of the conventional connecting portion 164 (see FIG. 11). The connecting and fixing portion 4 of the new simulated blood vessel 1 makes it possible to connect and fix blood vessel portions 3 having different diameters.

As shown in FIGS. 1 and 11, the simulated blood filled in the conventional and new simulated blood vessels 1, 161 is colored red to give a sense of realism, and the blood vessels 3, 163 are in a state in which air does not enter. is sealed with By keeping the simulated blood bag 2, 162 and the blood vessel part 3, 163 in such a state that air does not enter, air bubbles mixed with liquid and air are prevented from entering the syringe when the practitioner pricks the needle. be able to. Further, by packaging the simulated blood bag 2, 162 in a completely sealed package, deterioration of the simulated blood bag 2, 162 and the blood vessel portion 3, 163 made of natural rubber can be prevented.

Although the proximal support 106 of the present invention is shown and described in FIGS. 12 and 13, see also FIGS. 1, 5 and 11 for simulated blood vessels. The proximal end support portion 106 supports the proximal end portions 3a, 163a of the blood vessel portions 3, 163, and also supports the connection portions protruding from the simulated blood bag 2, 162, the connection portion 164, and the connection fixing portion 4. There is (see FIG. 9). A plurality of stepped portions 112, 112 are formed behind the three bag placement portions 111, 111 arranged in the width direction, and recesses 113, 113 are formed between the stepped portions 112, 112. As shown in FIG. The recesses 113 , 113 have a predetermined width and length so as to accommodate the connecting and fixing part 4 of the new simulated blood vessel 1 . This width is preferably twice or more the thickness (diameter) of the conventional connecting portion 164 (see FIG. 14).

The recesses 113, 113 are surrounded on both sides in the width direction by side support walls 112a, 112a that form the side surfaces of the stepped portions 112, 112, and have a communication support portion 114 at the rear, but are open at the front. The communication support portion 114 has width extension portions 114a, 114a projecting so that the rear portions of the stepped portions 112, 112 protrude in the direction forming the recesses. Through holes 114b, 114b are formed by notching downward from the upper edges of the communication support portions 114, 114 and slanting toward the width extension portions 114a, 114a facing each other. This slanted and notched slanted portion (outer edge of the through hole 114b) has a rounded V shape that is curved downward and continues, and the lower ends of the through holes 114b and 114b are the upper surface of the simulated subcutaneous tissue layer 102. located below. The communication support portions 114, 114 are not simply plate-like bodies, but have a predetermined thickness in the front-rear direction, and have through-hole support surfaces 114c, 114c having the same thickness at the notched portions so as to be inclined.

Width extension portions 114a, 114a of the communication support portions 114, 114 support the connecting portions 164 of the simulated blood vessels 1, 161 arranged in the recesses 113, 113 and the connecting fixing portions 4 so as not to slip out of the simulated subcutaneous tissue layer 102. On the other hand, the V-shaped through holes 114b, 114b allow both blood vessel portions 3, 163 with different thicknesses (diameters) to be arranged. Moreover, the lower ends of the through holes 114b, 114b are positioned below the upper surface of the simulated subcutaneous tissue layer 102, and a predetermined space is provided between the through holes 114b, 114b and the simulated subcutaneous tissue layer 102 in the front-rear direction. This secures the play position of the blood vessel part 3, 163, and prevents the upper edge of the simulated subcutaneous tissue layer 102 from being damaged or damaged when the upper cover 105 is closed. In general, the smaller the diameter of the blood vessel, the weaker the strength of the blood vessel. Through hole support surfaces 114c and 114c having a predetermined length in the front-rear direction are formed on the upper planes of the through holes 114b and 114b of the communication support portions 114 and 114, respectively. The blood vessel part 3, 163 is supported without being damaged by the pressure.

In addition, the bag arrangement portions 111, 111 on the front side of the base end support portions 106, 106 are formed on the lower surface of the mounting body 101, and are formed with recesses of a predetermined size so that the simulated blood bags 2, 162 do not shift. be done. Further, the front upright piece 131 is formed with a support hole 131a for inserting and fixing a protruding piece arranged at the base end position of the simulated blood bag 2,162. The support hole 131a has a configuration in which narrow holes on the upper side and wide holes on the lower side are combined so as to correspond to projecting pieces of different sizes.

The bag arrangement portions 111, 111 are wound with a tourniquet at the time of use, so that the plurality of simulated blood bags 2, 2, 162, 162 can be pressed at once by the presser 108 formed on the front side of the upper cover 105. can be done. When the presser 108 is pushed downward, the simulated blood bag 2, 162 is pressed from above to increase the internal pressure of the simulated blood filled therein. This increase in internal pressure is the same for the simulated blood in the blood vessel part 3, 163, and realizes a state similar to the actual tensed state. In order to wind the tourniquet, both sides of the bag arrangement portions 111, 111 arranged on the mounting body 101, and tourniquet passing holes 115 cut in a concave shape to facilitate holding the tourniquet on both sides of the pressing member 108, 115 is formed (see FIG. 9).

The cutout portion 121 and the short groove 122 in the upright piece 131 at the rear end of the mounting body 101 will be described. As shown in FIGS. 14 and 15, the upright piece 131 at the rear end is formed with notches 133, 133 corresponding to the bending grooves 132, 132. A cut portion 121 is formed by notching the upright piece 131 to the bottom at the curved vertex position of 101 . Unlike the notches 133 , 133 , the cutout portion 121 is wide and formed in a V shape that is inclined from the standing piece 131 and curved downward. The excision width is at least large enough to pass through a large blood vessel, preferably a width that allows passage of a plurality of blood vessels 3 , and is preferably approximately the same as the through hole 114 b of the communication support 114 of the base end support 106 . By having this cutout portion 121, it is also possible to use a blood vessel portion 3 that is longer than the longitudinal direction of the mounting body 101. FIG. In addition to this, as shown in FIGS. 5 and 9, it is possible to provide a discharge connection part 7, an intermediate connection part 8, and a connection member 9 on the distal end side of the blood vessel part 3, and it is possible to discharge the blood vessel part 3, so that administration type training is possible. Become.

A short groove 122 is formed in the simulated subcutaneous tissue layer 102 near the cutout portion 121 of the upright piece 131 to reach the lower end of the cutout portion 121 . The short groove 122 preferably descends gradually from its base end (front side end) to reach the lower end of the cut portion 121, and preferably has a width approximately equal to the width of the cut portion 121, but the base end is at a right angle. It may be one that descends to The short groove 122 is arranged only in the vicinity of the rear upright piece 131 having the cutout portion 121, and the other simulated subcutaneous tissue layers 102 do not have a groove shape.

The length of the short groove 122 in the longitudinal direction is about the same as the height of the standing piece 131, and is about 1/10 to 2 of the length of the simulated subcutaneous tissue layer 102 in the longitudinal direction, more preferably. It is 1/10 of the same length. The depth of the short groove 122 is such that the blood vessel portion 3, 163 is completely immersed, and is deeper than the length of the short groove 122 in the width direction.

By forming this short groove 122 , the rear edge of the upper cover 105 prevents the vascular portion 3 from being damaged and damaged, and furthermore, the vascular portion 3 is prevented from being damaged by the cut portion 121 of the upright piece 131 . preventing it from happening. In addition, the simulated subcutaneous tissue layer 102 itself of the present embodiment does not have grooves or the like for holding the blood vessel portion, which are present in other products, and the blood vessel portion 3 can be freely laid thereon. Different blood vessels can be freely arranged, and the user can grope to confirm the position of the blood vessel. On the other hand, the practice may be performed in a state in which the simulated blood bag 2, 162 is pressed by the presser 108 and the blood vessel portion 3, 163 is stretched. need to be discharged. Therefore, it is preferable that the short groove 122 be as short as possible and have a length necessary for immersing the distended blood vessel portion 3 .

Further, as shown in FIG. 9, the mounting body 1 is provided with a deck 140 having a flat bottom surface so as to be placed on a desk or the like. This deck 140 is also provided with a deck cut-out portion 123 at a position corresponding to the cut-out portion 121 of the standing piece 131 . Having this deck resection part 123 makes it possible to use a long blood vessel part and to perform administration-type training even when the mounting body 101 is arranged on the deck 140 and training is performed on a table.

DESCRIPTION OF SYMBOLS 1... Simulated blood vessel 2... Simulated blood bag 3... Blood vessel part 3a... Base end part 3b... Tip part 4... Connection fixing part 5... Adapter 6... Connector 7... Discharge connection part 8... Intermediate Connection member 11 Outflow tube 14 Engaging part 21 Outer tube 22 Inner tube 23 Base end of adapter 24 Slit 31 Outer wall 32 Bottom 33 Through hole 34 Projection locking portion 35 Locked portion 9 Connecting member 45 Second adapter 46 Second connector 51 Outer cylinder 52 Inner cylinder 53 Base end of adapter 54 Slit 61 Outer wall 62 Bottom 63 Through hole 64 Protrusive locking portion 74 Threaded portion 72f Threaded portion 73 Discharge channel 77 Shield valve 85 Communicating needle 85a Aperture, 87... discharge channel.

Claims (5)

A simulated blood bag filled with simulated blood and a tubular blood vessel part are connected by a connecting and fixing part, and the simulated blood bag is pressed to make the blood vessel part tense for injection training. a blood vessel,
The connecting and fixing part has an adapter attached to one end of the blood vessel part, and a connector that encloses the adapter and is connected to and fixed to the simulated blood bag,
The adapter has an outer cylinder, an inner cylinder, and a space between the outer cylinder and the inner cylinder for connecting an open end, which is one end of the blood vessel, and
A simulated blood vessel for injection practice, wherein the connector includes a protruding engaging portion for tightening a holding state between the adapter and the blood vessel portion in a state in which the adapter is enclosed. The simulated blood bag has an outflow tube that is fixed and connected to the connector of the connection fixing part,
The adapter includes an adapter proximal end portion having an inclined surface for positioning the insertion state into the outflow tube, an outer cylinder extending further in the distal direction from the distal end position of the adapter proximal end portion, and an inner cylinder. have
The outer cylinder has a plurality of slits divided in the circumferential direction, and each divided outer cylinder has a tapered shape that tapers from the proximal end to the distal end,
The connector is cap-shaped and has an outer wall that is screwed to the outflow tube and a bottom, and has a through hole for leading out the blood vessel to the bottom, and a protruding engaging portion that protrudes in a tapered shape from the bottom. have
When the connector is fixed to the outflow tube in a state where the connector encloses the adapter, the protruding locking portion is inserted between the inner surface of the outflow tube and the surface of the outer tube, and the outer tube 2. The simulated blood vessel for injection practice according to claim 1, wherein the inwardly tightens the . The outflow tube of the simulated blood bag has an engaging portion having a ridge shape protruding from the surface of the outflow tube on the proximal end side of the threaded portion,
The connector has a locked portion formed by recessing the proximal edge of the outer wall,
3. The method for practicing injection according to claim 2, wherein the protruding locking portion is located in a recess of the locked portion when the connector is screwed into the simulated blood bag and fixed. simulated blood vessels. A simulated blood bag filled with simulated blood and one end of a tubular blood vessel are connected by a connecting and fixing part, and the other end of the blood vessel is connected to a discharge tube by a discharge connection part. a blood vessel,
The discharge connection part comprises a second adapter attached to the other end of the blood vessel part, and a second connector that encloses the second adapter and is connected and fixed to the discharge tube,
The second adapter includes an adapter proximal end portion having an inclined surface, an outer cylinder extending from a distal position of the adapter proximal end portion, an inner cylinder, and the blood vessel portion between the outer cylinder and the inner cylinder. a space connecting the open ends of
The outer cylinder has a plurality of slits divided in the circumferential direction, and each divided outer cylinder has a tapered shape that tapers from the base end to the tip end,
The second connector has a cap-like shape having an outer wall to be screwed to the discharge tube and a bottom, and has a through hole in the bottom for leading out the blood vessel and a projection tapered from the bottom. and a locking portion,
In a state in which the second connector encloses the second adapter, the projecting locking portion is inserted between the inner surface of the discharge tubular article and the surface of the outer cylinder, and the outer cylinder is pushed inward. 4. The simulated blood vessel for injection practice according to any one of claims 1, 2 or 3, wherein the attachment state between the second adapter and the blood vessel portion is maintained by tightening. having an intermediate connection member, which is a discharge tube connected to the discharge connection, and a connection member further connected to the intermediate connection member;
The intermediate connection member has a discharge channel inside, a shield valve that closes the discharge channel, a threaded portion that connects to the second connector of the discharge connection portion, a threaded portion that connects to the connecting member, has
The connection member has a communication needle that irreversibly switches from a closed state to an open state by breaking through the shield valve,
The communication needle is composed of a cylindrical portion having a communication channel therein and a conical needle tip protruding from the tip of the cylindrical portion,
5. The simulated blood vessel for injection practice according to claim 4, wherein said needle tip has an opening for said communication channel on its peripheral surface.

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