JP7309207B2 - Injection practice tool - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention reproduces a state close to the feeling of an actual injection when medical personnel such as doctors, nurses, midwives, public health nurses, clinical laboratory technologists, paramedics, and nursing students practice various injection-related procedures. , and an invention relating to an injection practice tool with improved practice effect.

Injection is an essential technique for medical personnel such as doctors, nurses, midwives, public health nurses, clinical laboratory technologists, paramedics, and nursing students. is. 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.

Further, as a technique for connecting medical tubes, Patent Document 2 discloses a mouthpiece having a tapered portion for fitting a tube at one end and a threaded portion provided at the other end, and a tube having a tapered inner surface facing the tapered portion. and a nut whose one end is screwed onto the threaded portion of the mouthpiece and whose other end engages the tightening ring. In this device, when the nut is screwed in, the clamping ring moves to one end, and the tapered portion and the inner surface of the taper hold the tube while expanding its diameter, and the tube is clamped and fixed to the mouthpiece.

JP 2019-152770 A JP-A-2-46821

The injection practice device of Patent Document 1 sandwiches a simulated blood vessel between a simulated skin layer and a simulated subcutaneous tissue layer, and presses the simulated blood bag with a presser to stretch the blood vessel portion for injection practice. A state similar to the state of the injection act could be realized. However, in the invention described in Patent Document 1, since it is assumed that the portion where the simulated blood vessel is arranged is a blood vessel portion with a single diameter, a plurality of types of thick blood vessels and thin blood vessels that match the actual human body are arranged. , it was not possible for the practitioner to perform the work of sorting. In addition, since the tip of the simulated blood vessel is closed in the injection practice device described in Patent Document 1, it was suitable for performing blood collection training in which simulated blood is extracted. difficult to practice administration-related procedures that would add to As described above, the injection practice tool described in Patent Document 1 can only realize a uniform form of practice, and can be used flexibly, such as using simulated blood vessels of different diameters at once or performing administration type practice. A response was expected.

In addition, the vascular injection simulator described in Patent Document 2 can connect a flexible container or a vinyl pouch to an artificial blood vessel. Therefore, the position of the artificial blood vessel did not change, and the practitioner could not find out the position of the blood vessel and practice.

Therefore, in view of the problems of the prior art, the present invention provides an injection practice tool that allows practice by reproducing various situations, such as using simulated blood vessels of different diameters at once and practicing dosage forms. .

The injection practice device of the present invention is formed of a longitudinally elongated arc-shaped rigid material curved in the width direction, and includes a mounting body having an arm passage portion inside the mounting body, and a simulated subcutaneous tissue comprising a projecting arc surface disposed on the mounting body. and an upper cover having a simulated skin layer covering the simulated subcutaneous tissue layer and the simulated blood vessel from above, and the simulated blood vessel comprises a simulated blood bag sealing the simulated blood and a tubular blood vessel portion. An injection practice device that can be placed in a subcutaneous tissue layer and that can be practiced by tensing the blood vessel part with a presser that presses the simulated blood bag on the upper cover, wherein the mounting body has the simulated blood bag. and a plurality of proximal support portions positioned behind the bag placement portion and capable of supporting the proximal portion of the blood vessel, wherein the proximal support portion is , a recess that has support walls on both sides and accommodates the proximal end portion of the blood vessel, and a communication support section that has a through hole that allows communication with the blood vessel on the distal end side of the support wall. The communication support portion is characterized in that the through hole is formed by an inclined support portion inclined from the upper edge.

Further, the communication support portion includes two width extension portions directed toward each other from the side support walls on both sides, and a through hole formed by notching downward from the extension end of each of the two width extension portions. and a through-hole supporting surface capable of supporting the blood vessel part on the notched upper plane of the through-hole.

In addition, it is preferable that the mounting body has a wall portion that partitions the simulated subcutaneous tissue layer in the front and rear portions, and that a cutting portion is formed in the arcuate top portion of the rear wall portion at the center in the width direction.

In addition, it is preferable that the simulated subcutaneous tissue layer has a short groove extending from the surface to the lower end of the excision near the excision.

Further, the mounting body is detachably attached to the deck held in a curved protruding form, and it is preferable that the deck is formed with a deck cut-out portion at a position corresponding to the cut-out portion of the mounting body.

According to the first aspect of the invention, even if the diameter (thickness) of the simulated blood vessel portion to be attached to the attachment main body is different, it is possible to arrange the simulated blood vessel and to enable various training. That is, the simulated blood vessel has various sizes at the proximal end portion, which is the portion that connects the simulated blood bag and the blood vessel portion, and the thickness of the blood vessel portion is also different. The base end portion is accommodated in the recess of the base end support portion of the present invention, and the passage hole having the inclined support portion is provided. Due to the support it provides, vessels of various thicknesses can be used. Furthermore, by arranging a plurality of base end support parts, it is possible to arrange thick blood vessels such as arteries and other thin blood vessels at the same time, so that the trainee can grope and practice injection to the desired blood vessel. It becomes possible to provide an injection practice tool that can reproduce the situation. In addition, since the recess accommodates the connecting portion of the simulated blood vessel, it is possible to practice injection without hindering the pressing of the simulated blood bag by the presser.

According to the second aspect of the present invention, the communication support portion has the width extension portion, so that the connection portion and the connection fixing portion of the simulated blood vessel can be locked, and the so-called blood vessel portion can be prevented from coming off. In addition, since the through-hole has a through-hole supporting surface, it can be supported on the upper part of the through-hole, and the blood vessel can be positioned and supported while preventing shearing while being pressed by the upper cover. .

According to the third aspect of the invention, even a simulated blood vessel having a length that cannot be accommodated in the mounting body can be used by extruding it from the mounting body through the resection portion. In addition to this, by connecting the distal end of the simulated blood vessel to a discharge container, etc., it becomes possible to perform not only blood collection training but also administration training such as drip infusion, and injection practice that can reproduce various situations. equipment can be provided.

According to the fourth aspect of the present invention, a short groove leading to the lower end of the cut portion is formed in the vicinity of the cut portion on the distal end side of the simulated blood vessel and the mounting body. The edge of the upper cover presses the tip side of the simulated blood vessel so as not to interfere with administration practice such as infusion. In other words, since the simulated blood vessel is a flexible member that can be freely bent, if there is no short groove, the simulated blood vessel will be unexpectedly bent at the edge portion with the upper cover, thereby obstructing the flow path in the blood vessel. The use of the short grooves avoids direct contact with the edges of the upper cover, enabling smooth administration practice.

According to the fifth aspect of the invention, since the deck is also formed with the deck cut-out portion, it is possible to collect blood not only when the mounting body is wrapped around the arm, but also when practicing injection with the mounting body placed on the deck. It becomes possible to perform not only practical training but also administration training.

Fig. 2 is an overall perspective view of the injection training device of the present invention provided with a new simulated blood vessel; Fig. 2 is a perspective view showing a state in which the mounting body is removed from the deck and the simulated blood vessel is also removed from Fig. 1; 1 is a perspective view showing a conventional simulated blood vessel used in the injection practice device of the present invention; FIG. Fig. 2 is a perspective view showing a new simulated blood vessel used in the injection practice device of the present invention; 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. 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. 10(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.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an injection training device 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 1 is the front-rear direction, the left rear side in FIG. 1 is the front side or base end side, and the right front side is the rear side or tip side. Also, the direction perpendicular to the longitudinal direction of the mounting body 1 will be described as the width direction or the lateral direction.

As shown in FIGS. 1 and 2, the basic configuration of the injection training device according to the present invention includes an attachment body 1, a simulated subcutaneous tissue layer 2 disposed on the upper surface of the attachment body 1, and an upper portion of the simulated subcutaneous tissue layer 2. and an upper cover 5 on which a simulated skin layer 4 is stretched. The simulated blood vessels 61 and 101 are arranged on the simulated subcutaneous tissue layer 2, the upper cover 5 is put on, and the simulated blood vessels 61 and 101 are found from the simulated skin layer 4 to perform the injection practice (see FIGS. 3 and 4).

First, the mounting body 1 of the injection training device of the present invention will be described. The mounting body 1 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. 2, the back side of the mounting body 1, which has a protruded arc shape and an arch shape, is open inside, and the open inside portion serves as an arm-passing portion 42. As shown in FIG. The mounting body 1 can be placed on a table while being mounted on the deck 40 as shown in FIG. 1, but as shown in FIG. The arm loop portion 42 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 1 is removed from the deck shown in FIG. The mounting body 1 is mounted at a position between the elbow joint of the arm and the wrist by wrapping the arm through part 42 around the arm. Then, in a state of being worn on the arm, the injection needle can be inserted into the simulated blood vessel 101 from the surface (upper surface) of the simulated skin layer 4 of the upper cover 5 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.

The configuration of the mounting body 1 will be described. As shown in FIGS. 1 and 2, the mounting body 1 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 1 when the practitioner uses it by mistake, but also to remove the simulated skin layer 4, the simulated subcutaneous tissue layer 2, 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 1 has upright pieces 31, 31 with upright front and rear ends in the longitudinal direction. The surface of the mounting body 1 has two bending grooves 32 , 32 as curvature changing means along the longitudinal direction from the front standing piece 31 to the rear standing piece 31 . Notches 33, 33 are formed at positions of the front and rear standing pieces 31, 31 corresponding to the bending grooves 32, 32, so that the arch form of the arch-shaped mounting body 1 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 1 according to the thickness of the arm of the dummy wearer.

As shown in FIGS. 1 and 2, the mounting body 1 has a plurality of bag placement portions 11, 11 for placing the simulated blood bag 102 of the simulated blood vessel 101 on the rear side of the front upright piece 31, arranged in the width direction. On the side, there is a connecting part 64, which is the base end part of the conventional and new simulated blood vessels 61, 101, and a proximal end supporting part 6 that accommodates the connecting fixing part 104 (see FIGS. 1 and 3), and a projecting arc behind it. A planar simulated subcutaneous tissue layer 2 is arranged, and a rear standing piece 31 is arranged behind it.

The simulated subcutaneous tissue layer 2 is an arcuate, arch-shaped body that matches the curved shape of the upper surface of the attachment body 1, 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 1. 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 2 is detachable, and its plane extends to the vicinity of the upper edge of the standing piece 31 .

Next, the upper cover 5 on which the simulated skin layer 4 is stretched will be described. A simulated skin layer 4 covering the upper side of the simulated subcutaneous tissue layer 2 is stretched over an upper cover 5 arranged on the upper surface of the mounting body 1 . The upper cover 5 is formed in an arch shape that matches the curved shape of the upper surface of the mounting body 1, the central portion of which is excised, and the simulated skin layer 4 is stretched. A presser 8 is formed on the front side of the upper cover 5 , and a presser connecting portion 7 is formed between the upper cover 5 and the presser 8 so that both sides in the width direction are open. When the upper cover 5 is closed, the presser 8 is positioned above bag placement portions 11 , 11 to be described later, and the presser connecting portion 7 is positioned above the base end support portion 6 .

By forming the simulated skin layer 4 with a urethane-based material, unlike the case where it is formed with a silicon-based material, the dryness (wetness) of the disinfectant alcohol can be visually confirmed, and the dryness (wetness) of the disinfectant 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 5 has engaging claws 34 formed on the sides thereof as fixing means to the mounting body 1 at the side edge portions in the longitudinal direction. On the other hand, the engaging portion 35 is formed on the mounting body 1, and the upper cover 5 can be detachably attached to the mounting body 1 by engaging these portions.

Next, a simulated blood vessel arranged on the mounting body 1 will be described. As shown in FIG. 3, a conventional simulated blood vessel 61 is formed by connecting and fixing a blood vessel portion 63 and a simulated blood bag 62 with a connecting portion 64, and is supplied as a disposable product. The simulated blood bag 62 contains simulated blood in an upper-shaped bag in the drawing, and the proximal end portion of the bag 62 and the proximal end portion 63 a of the simulated blood vessel 61 are connected by a cylindrical connecting portion 64 . . The blood vessel portion 63 uses a tubular tube made of natural rubber or the like, and the connection portion 64 uses a resin molding having approximately the same thickness (diameter) as the blood vessel portion 63 .

A new simulated blood vessel 101 that can be used in this embodiment connects a blood vessel portion 103 and a simulated blood bag 102 with a connecting/fixing portion 104 as shown in FIG. Although the details will be described later, as shown in FIG. 11, this connecting/fixing part 104 has an adapter 105 arranged at the base end portion 103a of the blood vessel part 103, and this adapter 105 is screwed into the outflow tube 111 of the simulated blood bag 102. By doing so, the connection is made by the connector 106 that is connected and held. Since the connector 106 is connected so as to include the adapter 105 , the thickness and the outer diameter are larger than those of the conventional connecting portion 64 . The connecting and fixing portion 104 of the new simulated blood vessel 101 makes it possible to connect and fix blood vessel portions 103 having different diameters.

As shown in FIGS. 3 and 4, the simulated blood filled in the conventional and new simulated blood vessels 61 and 101 is colored red to give a sense of realism, and the blood vessel parts 63 and 103 are in a state in which air does not enter. is sealed with By keeping the simulated blood bags 62, 102 and the blood vessel parts 63, 103 in a state where 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 bags 62, 102 in a completely sealed package, deterioration of the simulated blood bags 62, 102 and the blood vessel portions 63, 103 made of natural rubber can be prevented.

The proximal support 6 of the present invention will be described with reference to FIGS. 5 and 6, but please also refer to FIGS. 3 and 4 for simulated blood vessels. The proximal end support portion 6 supports the proximal end portions 63a, 103a of the blood vessel portions 63, 103, and also supports the connecting portion, the connecting portion 64, and the connecting fixing portion 104 protruding from the simulated blood bags 62, 102. (see Figure 1). A plurality of stepped portions 12, 12 are formed behind the three bag placement portions 11, 11 arranged in the width direction, and recesses 13, 13 are formed between the stepped portions 12, 12. As shown in FIG. The recesses 13 , 13 have a predetermined width and length so as to accommodate the connecting and fixing part 104 of the new simulated blood vessel 101 . This width is preferably twice or more the thickness (diameter) of the conventional connecting portion 64 (see FIG. 6).

The recesses 13, 13 are surrounded on both sides in the width direction by side support walls 12a, 12a which form the side surfaces of the stepped portions 12, 12, and have a communication support portion 14 at the rear, but are open at the front. The communication support portion 14 has width extension portions 14a, 14a projecting so that the rear portions of the stepped portions 12, 12 protrude in the direction forming the recesses. Through holes 14b, 14b are formed by notching downward from the upper edges of the communication support portions 14, 14 and slanting toward the respective opposed width extension portions 14a, 14a. This slanted and notched slanted portion (outer edge of the through hole 14b) has a rounded V shape that is curved downward and continues, and the lower ends of the through holes 14b and 14b are the upper surface of the simulated subcutaneous tissue layer 2. located below. The communication support portions 14, 14 are not simply plate-like bodies, but have a predetermined thickness in the front-rear direction, and have through-hole support surfaces 14c, 14c having the same thickness at the notched portions so as to be inclined.

Width extension portions 14a, 14a of the communication support portions 14, 14 support the connecting portions 64 and the connecting fixing portions 104 of the simulated blood vessels 61, 101 arranged in the recesses 13, 13 so as not to slip out into the simulated subcutaneous tissue layer 2. On the other hand, the V-shaped through holes 14b, 14b allow both blood vessel portions 63, 103 with different thicknesses (diameters) to be arranged. Moreover, the lower ends of the through holes 14b, 14b are positioned below the upper surface of the simulated subcutaneous tissue layer 2, and a predetermined space is provided between the through holes 14b, 14b and the simulated subcutaneous tissue layer 2 in the front-rear direction. This secures the play positions of the blood vessel portions 63 and 103, and prevents the upper edge of the simulated subcutaneous tissue layer 2 from being damaged or damaged when the upper cover 5 is closed. In general, the smaller the diameter of the blood vessel, the weaker the strength of the blood vessel. Further, through hole support surfaces 14c, 14c having a predetermined length in the longitudinal direction are formed on the upper planes of the through holes 14b, 14b of the communication support portions 14, 14, so that the upper cover 5 can be secured at the through holes 14b, 14b. He is trying to support the blood vessel parts 63 and 103 without breaking them by pressing.

In addition, the bag arrangement portions 11, 11 on the front side of the base end support portions 6, 6 are formed on the lower surface of the mounting body 1, and are formed with recesses of a predetermined size so that the simulated blood bags 62, 102 are not displaced. be done. In addition, the front upright piece 31 is formed with a support hole 31a for inserting and fixing the protruding piece arranged at the base end position of the simulated blood bags 62 and 102 . The support hole 31a 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.

A plurality of simulated blood bags 62, 62, 102, 102 can be compressed at once by a pressing member 8 formed on the front side of the upper cover 5 by winding a tourniquet when using the bag arrangement portions 11, 11. can be done. When the presser 8 is pushed downward, the simulated blood bags 62 and 102 are 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 portion 63 (103), and realizes a state similar to the actual hypertension state. In order to wind the tourniquet, both sides of the bag placement portions 11, 11 arranged on the mounting body 1, and tourniquet passing holes 15 cut in a concave shape for easy holding of the tourniquet on both sides of the presser 8, 15 are formed (see FIG. 1).

The cutout portion 21 and the short groove 22 in the upright piece 31 at the rear end of the mounting body 1 will be described. As shown in FIGS. 7 and 8, the upright piece 31 at the rear end is formed with notches 33, 33 corresponding to the bending grooves 32, 32. A cut portion 21 is formed by notching the upright piece 31 to the bottom at one curved vertex position. The cut portion 21 is wide unlike the cutouts 33, 33, and is formed in a V shape that is inclined from the upright piece 31 and curved downward. The excision width is at least wide enough to pass through a thick blood vessel, and preferably wide enough to pass through a plurality of blood vessels 103 , 103 . preferable. By having this cutout portion 21, it is also possible to use a blood vessel portion 103 that is longer than the longitudinal direction of the mounting body 1. FIG. In addition to this, as shown in FIGS. 1 and 12, it is possible to provide a discharge connection part 107, an intermediate connection part 108, and a connection member 109 on the distal end side of the blood vessel part 103, so that it is possible to practice administration type training. Become.

In addition, a short groove 22 is formed in the simulated subcutaneous tissue layer 2 near the excised portion 21 of the upright piece 31 to reach the lower end of the excised portion 21 . The short groove 22 preferably descends gradually from its proximal end (front end) to reach the lower end of the excised portion 21, and preferably has a width approximately equal to the width of the excised portion 21, but the proximal end is at a right angle. It may be one that descends to The short groove 22 is arranged only in the vicinity of the rear upright piece 31 having the cutout 21, and the other simulated subcutaneous tissue layer 2 does not have a groove shape.

The length of the short groove 22 in the longitudinal direction is about the same as the height of the standing piece 31, and is about 1/10 to 2 of the length of the simulated subcutaneous tissue layer 2 in the longitudinal direction, more preferably. It is 1/10 of the same length. The depth of the short grooves 22 is such that the blood vessel portions 63 and 103 are completely immersed, and is deeper than the length of the short grooves 22 in the width direction.

By forming this short groove 22, the blood vessel portion 103 discharged by the rear edge of the upper cover 5 is prevented from being damaged and damaged. preventing it from happening. In addition, the simulated subcutaneous tissue layer 2 itself of the present embodiment does not have grooves or the like for holding blood vessels, which are present in other products, and the blood vessels 103 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 conducted in a state in which the simulated blood bags 62 and 102 are pressed by the presser 8 and the blood vessel portions 63 and 103 are stretched. need to be discharged. Therefore, it is preferable that the short grooves 22 are as short as possible and have a length necessary for immersing the distended blood vessel portion 103 .

Further, as shown in FIG. 1, the mounting body 1 is provided with a deck 40 having a flat bottom surface so as to be placed on a desk or the like. The deck 40 is also provided with a deck cutout portion 23 at a position corresponding to the cutout portion 21 of the standing piece 31 . Having this deck resection part 23 makes it possible to use a long blood vessel part and to perform administration-type training even when the mounting body 1 is arranged on the deck 40 and training is performed on a table.

An example of a new simulated blood vessel that can be used in the injection practice device of the present invention will be described below with reference to FIGS. 4 and 9 to 15. FIG. In this description, the left side of the drawing (for example, the simulated blood bag side in FIG. 4) is defined as the base end side, and the right side of the drawing (for example, the blood vessel side in FIG. 4) is defined as the distal end side.

The simulated blood vessel 101, as shown in FIG. It is composed of a connection fixing portion 104 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 101 is a so-called disposable material that is discarded when used.

As shown in FIG. 9, the connecting/fixing part 104 of the simulated blood vessel 101 is composed of an adapter 105 and a connector 106. After connecting the blood vessel part 103 to the adapter 105, the adapter 105 is enclosed in the connector 106 to form a simulated blood bag. By connecting to the outflow tube 111 of 102 , the simulated blood bag 102 and the blood vessel portion 103 are connected and fixed in a state of communication within the simulated blood vessel 101 . The blood vessel part 103 is molded from a soft resin, and the adapter 105 and the connector 106 are also molded from a resin material.

The simulated blood bag 102 of the simulated blood vessel 101 will be described. The simulated blood bag 102 is composed of a hollow rectangular reservoir 110 and a cylindrical outflow tube 111 protruding from one surface of the reservoir 110 . The outflow tube 111 has an annular receiving portion 112 protruding inward from the inner periphery on the proximal side (see FIG. 10). The receiving portion 112 receives and engages an adapter 105, which will be described later, to position and fix it in the axial direction.

On the outer periphery of the outflow tube 111, there are two protruding ridges, a threaded portion 113 protruding for fixing to a connector 106, which will be described later, and a central lower end of the storage portion 110, which is the base end side of the threaded portion 113. It has locking portions 114 , 114 . The locking portions 114, 114 are located on the front surface and the back surface of the outflow tube 111, and are arranged 180 degrees apart in the circumferential direction. After the connector 106 has been fixed (screwed) to the outflow cylinder 111, the locking portions 114, 114 are fitted into and engaged with the locked portions 135, 135 of the connector 106, and the connector 106 is screwed. is stopped, and the connector 106 is locked in the locked state so as not to rotate unexpectedly.

By connecting and fixing the simulated blood bag 102 and the blood vessel part 103 , the insides of the storage part 110 and the blood vessel part 103 are communicated, and the simulated blood can be supplied from the storage part 110 into the blood vessel part 103 . The simulated blood bag 102 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, liquid leakage from the needle hole generated in the blood vessel part 103 due to blood collection, etc. is suppressed.

The blood vessel portion 103 will be described. The blood vessel part 103 is a tubular body having a predetermined length and having a proximal end portion 103a that opens on the proximal end side in the longitudinal direction and a distal end portion 103b that closes the other end side, and the proximal end portion 103a is connected and fixed. A device 104 connects to the simulated blood bag 102 . The blood vessel part 103 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 blood vessel portion 103 has a thin radial thickness (half the difference between the inner diameter and the outer diameter) of about 0.4 mm.

The connecting/fixing portion 104 will be described. As described above, the connecting/fixing portion 104 is composed of the adapter 105 for attaching and holding the blood vessel portion 103 and the connector 106 for connecting and holding the adapter 105 by screwing it onto the outflow tube 111 . By this connection, the connecting/fixing part 104 irreversibly fixes the blood vessel part 103 to the simulated blood bag 102 and communicates the insides of the simulated blood bag 102 to form a simulated blood flow path.

The adapter 105 will be explained. As shown in FIGS. 9, 10, and 11, the adapter 105 has a double-cylinder structure with an outer cylinder 121 and an inner cylinder 122 with an open front end surface. The adapter 105 has a space between the two tubes 121 and 122 into which the proximal end portion 103a of the blood vessel portion 103 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 103 and is about 0.44 mm. The inner circumference of the inner tube 122 has a longitudinal space with both ends opened, and serves as a flow path that connects the outflow tube 111 and the blood vessel portion 103 .

The adapter 105 has an adapter proximal end portion 123 that is located on the proximal side and is inclined toward the outer periphery. An elongated outer cylinder 121 is formed. The outer cylinder 121 has a tapered shape in which the thickness gradually decreases from the adapter proximal end portion 123 side to the distal end side, and is divided in the circumferential direction to form a plurality of slits 124 , 124 .

When the adapter 105 is inserted into the outflow cylinder 111 of the simulated blood bag 102, the adapter base end 123 formed in a conical cylindrical shape with an inclined surface engages the receiving part 112 protruding into the outflow cylinder 111, Moreover, by biting, the adapter 105 is positioned and fixed in the axial direction (longitudinal direction). As will be described later, by fixing (screwing) the connector 106 to the outflow tube 111 of the simulated blood bag 102, the outer tube 121 of the adapter 105 gradually moves the proximal end portion 103a of the blood vessel portion 103. Tighten and secure.

In the present embodiment, as shown in FIG. 10A, a blood vessel portion 103 simulating a normal blood vessel is used as the blood vessel portion 103, but a blood vessel portion having a diameter different from that of the normal blood vessel portion 103 can be used. . FIG. 10(b) shows a small blood vessel portion 115 that is thinner than the blood vessel portion 103 and simulates a small blood vessel. The inner diameter (inner diameter) of the normal blood vessel portion 103 is 1.5 mm, and the inner diameter of the small blood vessel portion 115 is 1.3 mm. The adapter also has an adapter 105 for use with a normal blood vessel portion 103 and a thin adapter 105a for holding a small blood vessel portion 115. FIG.

The thin adapter 105 a has an outer tube 121 with a smaller inner diameter than the adapter 105 and an inner tube 122 with a larger outer diameter than the adapter 105 , matching the size of the small blood vessel portion 115 . The thin adapter 105a has the outer diameter of the outer cylinder 121 and the shape and dimensions of the base end portion 123 of the adapter the same as those of the normal adapter 105, so that the connector 106 and the outflow cylinder 111 (simulated blood bag 102) can be attached. It is possible to hold. In addition to the normal blood vessel portion 103 and fine blood vessel portion 115, blood vessel portions having different diameters such as thinner blood vessel portions and thick blood vessel portions can be used.

Next, the connector 106 will be explained. 9, 10 and 11, the connector 106 is in the form of a cylindrical box (cap type) consisting of an outer wall 131 and a bottom 132. As shown in FIGS. The outer wall 131 has a threaded portion 131a that protrudes toward the center from the inner surface thereof, and is a nut-like member that is screwed into and engaged with the threaded portion 113 of the outflow tube 111 of the simulated blood bag 102 . The disk-shaped bottom portion 132 is open at the center and has a through hole 133 through which the blood vessel portion 103 is inserted. The connector 106 encloses the adapter 105 holding the proximal end portion 103a of the blood vessel portion 103 in the inner space of the outer wall 131 with the nut-shaped outer wall 131 screwed to the threaded portion 113 of the outflow cylinder 111, and passes through the adapter 105. The blood vessel portion 103 is led out through the hole 133 .

A protruding locking portion 134 is formed extending inwardly of the outer wall 131 from the periphery of the through hole 133 of the connector 106, in other words, protruding from the distal side toward the proximal side. The projecting locking portion 134 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 134 is formed at the edge of the through hole 133 of the bottom portion 132 and protrudes toward the internal space of the outer wall 131 along the axial direction. The projecting locking portion 134 has a tapered cylindrical shape, and the connector 106 is screwed into the outflow tube 111 of the simulated blood bag 102 while the adapter 105 with the blood vessel portion 103 attached thereto is inserted into the outflow tube 111 of the simulated blood bag 102 . As it goes on, it is inserted between the outer cylinder 121 of the adapter 105 and the inner peripheral surface of the outflow cylinder 111 from the tip of the tapered protruding locking part 134 . As the connector 106 is screwed into the protruding locking portion 134 that gradually becomes thicker from the proximal side to the distal side, the outer cylinder 121 of the adapter 105 is gradually pressed against the proximal end portion 103 a of the blood vessel portion 103 . , the holding state of the blood vessel portion 103 by the adapter 105 is strengthened.

The outer wall 131 of the connector 106 has two recessed portions corresponding to the two locking portions 114, 114 formed on the simulated blood bag 102 at the edge opposite to the bottom portion 132. Stops 135, 135 are formed. The recessed shape of the locked portions 135, 135 is such that the locking portions 114, 114 of the ridges are positioned in the recessed portions when the connector 106 is screwed to the outflow tube 111 of the simulated blood bag 102 to the deepest position. , it is positioned and fixed at the screwing completion position. In addition, when the connector 106 rotates unexpectedly due to this engagement, the engaging portions 114, 114 of the protrusions contact the recessed portions 135, 135 of the connector 106 to be engaged, thereby preventing the connector 106 from loosening.

As described above, the simulated blood bag 102 and the blood vessel portion 103 can be connected and fixed by the connecting/fixing portion 104 composed of the adapter 105 and the connector 106 of the simulated blood vessel 101 . Since blood vessels with different diameters can be used, training can be performed with simulated blood vessels of various diameters. Furthermore, the connector 106 and the simulated blood bag 102 (outflow tube 111) are used as common parts, so that the number of parts can be reduced. The size can be reduced so as not to interfere with pressing the simulated blood bag 102 or practice.

Next, a simulated blood vessel 101 (a second embodiment of a new simulated blood vessel) that can perform administration training in addition to blood collection training in addition to the connection fixing part 104 will be described. In the second embodiment, the adapter 105 and the connector 106 used in the first embodiment are arranged at the distal end portion 103b of the simulated blood vessel 101 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 101 (first embodiment) shown in FIG. 4 is connected to a simulated blood bag 102 by a connection fixing portion 104 at its proximal end portion, and is closed at its distal end portion 103b. On the other hand, as shown in FIG. 12, in the simulated blood vessel 101 of the second embodiment, the end of the distal end portion 103b is opened in the same manner as the proximal end portion 103a (see FIG. 14), and the blood vessel portion 103 is formed into a penetrating tubular shape. to form and attach the drain connection 107 . The discharge connection part 107 of the second embodiment has an intermediate connection member 108 and a connection member 109 attached, one end of a waste liquid tube 143 is connected to the connection member 109, and an external waste liquid container 141 is connected to the other end of the waste liquid tube 143. Thus, the drug solution or the like administered to the blood vessel portion 103 can be discharged to the waste liquid container 141 .

13, 14 and 15, the discharge connection 107 consists of a second adapter 145 and a second connector 146, the second adapter 145 having the same form as the first adapter 105. , the second connector 146 has a configuration in common with the first connector 106 . Although it is preferable to connect the waste liquid tube 143 via the intermediate connection member 108 screwed to the second connector 146 and the connection member 109 that connects the intermediate connection member 108, the discharge connection portion 107 (the second connector 146 ) directly to the waste liquid container 141 .

The second adapter 145 has the same shape as the first adapter 105 and is used as a common part. As with the first adapter 105, an outer cylinder 151, an inner cylinder 152, an adapter proximal end portion 153, slits 154, 154 are formed, and a distal end portion 103b of the blood vessel portion 103 is formed in the space between the outer cylinder 151 and the inner cylinder 152. hold.

The second connector 146 has the same shape as the first connector 106 and is a common component. As in the first connector, an outer wall 161, a threaded portion 161a, a bottom portion 162, a through hole 163, a projecting locking portion 164, and recessed locked portions 165, 165 are formed. It is also the same that the protruding locking portions 164, 164 tighten the outer wall 161 inwardly as they are screwed into.

The intermediate connecting member 108 will be described. As shown in FIGS. 14 and 15, the intermediate connection member 108 includes an inflow tube 171 having the same shape and dimensions as the outflow tube 111, and a cylindrical discharge portion 172 located on the tip side of the inflow tube 171 and internally communicating with the inflow tube 171. and have The intermediate connection member 108 has an internal space penetrating through the center of the member in the longitudinal direction, and serves as a waste fluid discharge channel 173 communicating with the blood vessel portion 103 .

The inflow tube 171 has a threaded portion 174 having a screw thread formed on the outer periphery. A flange 172a, which is a part of the ejection portion 172 described later, has locking portions 175, 175 protruding upward along the longitudinal direction on the front and back surfaces of the flange 172a, and a receiving portion 176 on the inner periphery on the proximal side. have. These shapes and dimensions are the same as those of the threaded portion 113, locking portions 114, 114, and receiving portion 112 of the outflow cylinder 111 of the simulated blood bag 102.

The inflow tube 171 is positioned and fixed by the receiving portion 176 in a state in which the second adapter 145 holding the blood vessel portion 103 is inserted. Furthermore, the locking portions 175, 175 of the projections allow the second connector 146 to be screwed until it reaches the recessed positions of the recessed locked portions 165, 165 of the second connector 146 and is locked. , the locking portions 175 and 175 are engaged with the locked portions 165 and 165 of the second connector 146 to prevent the second connector 146 from being loosened due to unexpected rotation or the like. It becomes the same as the first connector 106 .

The discharge portion 172 of the intermediate connection member 108 has a cylindrical shape concentric with the inflow tube 171 and protrudes toward the opposite side of the inflow tube 171 in the longitudinal direction. The base end portion of the inflow tube 171 is composed of a brim 172a projecting outward in the shape of a regular hexagonal plate, a base 172b cylindrically projecting from the brim 172a, and a cylindrical connecting cylinder 172c further projecting from the tip of the base 172b. The connecting cylinder 172c has a threaded portion 172f formed of threads on its surface, and has the same outer diameter as that of the inflow cylinder 171. As shown in FIG.

The tip of the base portion 172b (the end on the side of the connecting cylinder 172c) has an outwardly protruding annular convex portion 172d, and from the flange 172a, two intermediate locking portions 172e, 172e for stopping the screwing of the connecting member 109 are convex. is formed to protrude. The intermediate locking portions 172e, 172e are formed on the front and back surfaces and are spaced apart by 180 degrees on the circumference.

The intermediate connection member 108 has a discharge channel 173 that penetrates through the center of the member in the longitudinal direction from the inflow pipe 171 to the discharge part 172 , but the discharge channel 173 is blocked inside near the tip of the discharge part 172 . A membrane isolation valve 177 is placed (see FIGS. 14 and 15). With this shielding valve 177, the closed state of the distal end portion 103b of the blood vessel portion 103 can be maintained unless the connecting member 109 is screwed into the intermediate connecting member 108 to the complete position.

Next, the connecting member 109 will be described. As shown in FIGS. 14 and 15, the connecting member 109 has a cylindrical box-like (cap-like) shape consisting of an outer wall 181 and a bottom portion 182 . The outer wall 181 has a threaded portion 181a protruding from its inner surface toward the center, and is a nut-like member that is screwed into and engaged with the threaded portion 172f of the discharge portion 172 of the intermediate connection member .

The outer wall 181 has an edge opposite to the bottom portion 182 and is partially recessed. 183, 183 are formed. The locking portions 183, 183 prevent the connecting member 109 from rotating unexpectedly, and the threaded state can be continued. In addition, the edge of the outer wall 181 opposite to the bottom portion 182 is formed with a retainer protrusion 184 that protrudes from the peripheral edge toward the inner surface side, engages with the annular protrusion 172d of the intermediate connection member 108, and is held within a certain range or more. I'm trying not to get out.

The connecting member 109 includes a connecting needle 185 protruding from the center of the circle of the bottom portion 182 toward the inner side of the outer wall 181 in a needle shape, and a joint pipe protruding from the center of the circle of the bottom portion 182 to the opposite side of the communicating needle 185. A portion 186 is provided. The communication needle 185 has a cylindrical portion having a discharge channel 187 as a communication channel inside and a conical needle tip protruding from the tip thereof. A discharge channel 187 communicating with is formed. The joint tube part 186 is a member with a barbed tip, and can be inserted into the tube of the waste liquid tube 143 to be connected.

As the connecting member 109 is screwed into the intermediate connecting member 108 , the communicating needle 185 projecting inwardly of the connecting member 109 enters the discharge channel 173 of the intermediate connecting member 108 . As the screwing continues, the needle tip of the communication needle 185 breaks through the shield valve 177 closing the discharge passage 173 of the intermediate connection member 108 described above. In this state, the liquid discharged from the discharge channel 173 of the intermediate connection member 108 flows into the discharge channel 187 of the connecting member 109 through the opening 185a formed in the communicating needle 185, and the tip of the joint tube portion 186 is discharged from the opening 186a.

In this manner, the simulated blood vessel 101 of the second embodiment is directly connected to the waste liquid container 141 by arranging the discharge connecting portion 107 consisting of the second adapter 145 and the second connector 146 at the tip portion 103b. Furthermore, by connecting the intermediate connecting member 108 and the connecting member 109, it is possible to easily switch between the closed state and the discharged state. That is, when the intermediate connection member 108 is connected to the discharge connection portion 107 and the intermediate connection member 108 and the coupling member 109 are not completely screwed together and left in a loosened state, the shield valve 177 formed in the intermediate connection member 108 is formed. As a result, the simulated blood vessel 101 is shielded at the distal end thereof. When the connecting member 109 is screwed into the intermediate connecting member 108 from this state, the communicating needle 185 breaks through the shield valve 177 as described above, and the waste liquid flows from the joint tube portion 186 to the waste liquid container 141 via the waste liquid tube 143. to discharge. In this way, it is possible to switch between them only by 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.

DESCRIPTION OF SYMBOLS 1... Mounting main body 2... Simulated subcutaneous tissue layer 4... Simulated skin layer 5... Upper cover 6... Base end support part 7... Presser connection part 8... Presser (tourniquet winding part), REFERENCE SIGNS LIST 11 Back arrangement portion 12 Step portion 13 Recess 13a Side support wall 14 Connection support portion 14a Width extension portion 14b Through hole 14c Through hole support surface 15 Drive Vessel passing hole 21 Cutting portion 22 Short groove 23 Deck cutting portion 31 Standing piece 31a Supporting hole 32 Bending groove 33 Notch 34 Locking portion 35 Cover Locking portion 40 Deck 42 Arm passage portion 61 Simulated blood vessel 62 Simulated blood bag 63 Blood vessel portion 64 Connecting portion 101 Simulated blood vessel 102 Simulated blood bag 103 Blood vessel portion , 104 ... connection fixing part

Claims (5)

A mounting body formed of an arc-shaped hard material that is longitudinally elongated and curved in the width direction, the inner side of which serves as an arm-passing portion, a simulated subcutaneous tissue layer consisting of a projecting arc plane disposed on the mounting body, and the simulated subcutaneous tissue layer. an upper cover having a simulated skin layer covering from above,
A simulated blood vessel consisting of a simulated blood bag sealed with simulated blood and a tubular blood vessel portion can be placed on the simulated subcutaneous tissue layer, and the blood vessel portion is made taut by a presser that presses the simulated blood bag on the upper cover. is an injection practice device capable of
The attachment main body includes a plurality of bag placement portions on which the simulated blood bag can be placed, and a plurality of proximal end support portions located behind the bag placement portion and capable of supporting a proximal end portion of the blood vessel portion. , has
The proximal end support section is composed of side support walls on both sides and a rear communication support section, and has a recess for accommodating the proximal end portion of the blood vessel section,
The injection practice device, wherein the communication support part has through holes that are inclined from both sides so that the width of the communication support part becomes narrower downward from the upper edge. The communication support portion has two width extensions directed toward each other from the side support walls on both sides, and a through hole notched downwardly from the extension end of each of the two width extensions. have
2. The injection training device according to claim 1, wherein the notched upper plane of the through hole has a through hole supporting surface capable of supporting a blood vessel portion. 3. The injection according to claim 1 or 2, wherein the mounting body has an upright piece that rises from the rear end edge, and a cutting portion is formed by cutting off a projecting arcuate top portion in the center of the widthwise direction of the upright piece. practice tool. 4. The injection practice device according to claim 3, wherein the simulated subcutaneous tissue layer has a short groove extending from the surface to the lower end of the cut portion near the cut portion. The mounting body is detachably attachable to a deck held in a curved protruding form,
5. The injection training device according to claim 3, wherein a deck cutout is formed in the deck at a position corresponding to the cutout of the mounting body.

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