JP2022073111A - Injection training tool - Google Patents

Abstract

To provide an injection training tool which reproduces various situations such as use of simulated blood vessels with different thicknesses once, for training.SOLUTION: An injection training tool comprises: a fitting main body 1; a simulated subcutaneous tissue layer 2; and an upper cover 5 having a simulated skin layer 4, and on the injection training tool, a simulated blood vessel 101 formed of a simulated blood vessel bag 102 and a blood vessel part 103 can be arranged. The fitting main body comprises: a bag arrangement part 11 on which the simulated blood vessel bag is arranged; and a base end support part 6 for supporting a base end part of the blood vessel part. The base end support part has a recess which is formed of side support walls on both sides and a communication support part 14 on a rear side for storing the base end part. The communication support part has a passage hole 14b which is inclined from both sides and is open so that a width becomes narrower from an upper edge toward a lower side. By the inclined passage hole, a thick blood vessel part is supported at an upper side, a thin blood vessel part is supported at a lower side, for allowing use of blood vessel parts with various thicknesses.SELECTED DRAWING: Figure 1

Description

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

Injection is an indispensable technique for medical personnel such as doctors, nurses, midwives, public health nurses, clinical laboratory technicians, paramedics, and nursing students, and its lack of skill immediately causes pain to patients. Is. However, the improvement of injection technique has largely depended on the accumulation of experience of each medical person, and it has been difficult to carry out effective training.

In Patent Document 1, a simulated blood vessel is arranged 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 attached to an arm for actual injection. An injection practice tool that reproduces a state close to the sensation is disclosed. The simulated blood vessel is formed by connecting one end to a simulated blood bag that stores simulated blood.

Further, as a technique for connecting a medical tube, Patent Document 2 has a mouthpiece having a tapered portion for fitting a tube at one end and a threaded portion at the other end, and a tube having a tapered inner surface facing the tapered portion. Disclosed is a tube connecting device for an endoscope, which comprises a tightening ring that fits on the outside of the endoscope, and a nut that has one end screwed into a threaded portion of a mouthpiece and the other end a nut that locks the tightening ring. In this device, the tightening ring is moved to one end side by screwing the nut, and the tube is sandwiched while expanding the diameter by the tapered portion and the inner surface of the taper, and the tube is tightened and fixed to the base.

Japanese Unexamined Patent Publication No. 2019-152770 Japanese Unexamined Patent Publication No. 2-46821

The injection practice tool of Patent Document 1 can practice injection in a state where a simulated blood vessel is sandwiched between a simulated skin layer and a simulated subcutaneous tissue layer, and the simulated blood bag is pressed by a presser to make the blood vessel swell. It was possible to achieve a condition similar to that of the injection act. However, in the invention described in Patent Document 1, since the site where the simulated blood vessel is arranged is assumed to be a blood vessel portion having a single thickness, a plurality of types of thick blood vessels and thin blood vessels suitable for the actual human body are arranged. , The practitioner could not perform the sorting work. In addition, the injection practice tool described in Patent Document 1 is suitable for blood sampling training to extract simulated blood because the tip of the simulated blood vessel is closed. Difficult to practice administration-related procedures that will be added to. As described above, the injection practice tool described in Patent Document 1 can realize only a uniform practice form, and is flexible such as using simulated blood vessels of different thicknesses at once or performing administration type practice. It was hoped that a response would be taken.

Further, the blood vessel injection simulator described in Patent Document 2 can connect a flexible container or a vinyl pouch from an artificial blood vessel, but in the first place, grooves are arranged in a sponge material to arrange the artificial blood vessel. Therefore, the position of the artificial blood vessel did not change, and the practitioner could not find the position of the blood vessel and practice.

Therefore, in view of the problems of the prior art, we provide an injection practice tool that can reproduce and practice various situations such as using simulated blood vessels of different thicknesses at once or performing administration-type practice. ..

The injection practice tool of the present invention is formed of a vertically long and curved arcuate hard material in the width direction, and is a simulated subcutaneous tissue composed of a mounting body having an inner side as an arm passage portion and a salient arc plane arranged on the mounting body. The simulated blood vessel having a layer, an upper cover having a simulated subcutaneous tissue layer and a simulated skin layer covering the simulated blood vessel from above, and a simulated blood bag in which simulated blood is sealed and a tubular blood vessel portion is simulated. It is an injection practice tool that can be placed in the subcutaneous tissue layer and can be practiced by tensioning the blood vessel portion with a presser that presses the simulated blood bag against the upper cover. It has a plurality of back arrangement portions that enable it, and a plurality of proximal end support portions that are located behind the back arrangement portion and can support the proximal end portion of the blood vessel portion, and the proximal end support portion has. It has a recess having support walls on both sides to accommodate the proximal end portion of the blood vessel portion, and a communication support portion having a through hole through which the blood vessel portion can be communicated on the tip end side of the support wall. The communication support portion is characterized in that the through hole is formed by the inclined support portion inclined from the upper edge.

Further, the communication support portion has two width extension portions facing each other from the side support walls on both sides and a through hole that is inclined downward from each extension end of the two width extension portions to open a notch. It is preferable to have a through-hole support surface capable of supporting the blood vessel portion on the upper plane of the notch of the through-hole.

Further, in the mounting body, it is preferable that the simulated subcutaneous panniculus is partitioned by a wall portion in the front-rear direction, and a cut portion is formed in the radial apex portion in the center of the width direction of the rear wall portion.

Further, in the simulated subcutaneous panniculus, it is preferable that a short groove extending from the surface to the lower end of the excision portion is formed in the vicinity of the excision portion.

Further, the mounting body is detachable from a deck held in a curved and arcuate shape, and it is preferable that the deck cutting portion is formed on the deck at a position corresponding to the cutting portion of the mounting body.

According to the first aspect of the present invention, even if the diameter (thickness) of the blood vessel portion of the simulated blood vessel attached to the attachment main body is different, the arrangement is possible and various trainings are possible. That is, the simulated blood vessel has various sizes at the proximal end portion, which is a portion connecting the simulated blood bag and the blood vessel portion, and the thickness of the blood vessel portion is also different. By accommodating the proximal end portion in the recess of the proximal end support portion of the present invention and having a through hole having the inclined support portion, the thick blood vessel portion is above the inclined support portion, and the thin blood vessel portion is below. Since it can be supported, blood vessel portions of various thicknesses can be used. Furthermore, by arranging multiple proximal support parts at the same time, thick blood vessels such as arteries and other small blood vessels can be arranged at the same time, and the trainee can practice injection into the desired blood vessel by groping. It will be possible to provide injection practice tools 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 inhibiting the pressing of the simulated blood bag by the presser.

According to the second aspect of the present invention, by having the width extension portion in the communication support portion, the connecting portion and the connecting fixing portion of the simulated blood vessel can be anchored, and the so-called blood vessel portion can be prevented from coming off. Further, by having the through hole support surface in the through hole, it can be supported by the upper part of the through hole, and the blood vessel portion can be positioned and supported while being pressed by the upper cover so as not to be sheared. ..

According to the third aspect of the present invention, even a simulated blood vessel having a length that does not fit in the mounting body can be used by pulling it out from the mounting body through the excision portion. In addition to this, by further connecting to a drainage container etc. on the tip side of the simulated blood vessel, it becomes possible to perform not only blood sampling training but also administration type training such as intravenous drip, and injection practice that can reproduce various situations. It will be possible to provide the ingredients.

According to the fourth aspect of the present invention, a short groove leading to the lower end of the excision portion is formed in the vicinity of the excision portion on the distal end side of the simulated blood vessel and the mounting body, so that the simulated blood vessel can be easily guided to the excision portion as well. It is possible to press the tip side of the simulated blood vessel with the edge of the upper cover so as not to interfere with administration training such as infusion. That is, since the simulated blood vessel is a soft member that can be freely bent, if there is no short groove, the simulated blood vessel may be unexpectedly bent at the edge portion with the upper cover, obstructing the flow path in the blood vessel. By using the short groove, direct contact with the edge of the upper cover is avoided, and smooth administration training becomes possible.

According to the invention of claim 5, since the deck excision portion is also formed on the deck, blood is collected not only when the mounting body is wrapped around the arm but also when the injection practice is performed with the mounting body placed on the deck. Not only practical training but also administration training can be performed.

It is an overall perspective view of the state which provided the new simulated blood vessel in the injection practice tool of this invention. FIG. 1 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. It is a perspective view which shows the conventional simulated blood vessel used for the injection practice tool of this invention. It is a perspective view which shows the new simulated blood vessel used for the injection practice tool of this invention. It is a partially enlarged perspective view which shows the base end support part of a mounting body. It is a partially enlarged side view of the central base end support portion as viewed from the rear, (a) is a state in which a conventional simulated blood vessel is attached, and (b) is a state in which a new simulated blood vessel is attached. It is a rear end view which looked at the standing piece of the rear end of a mounting body from the rear. It is a partially enlarged perspective view which shows the excision part behind the mounting body. It is a plan view which disassembled the simulated blood vessel, and the simulated blood bag, the adapter and the connector are shown in the upper row, and the blood vessel portion is shown in the lower row. It is an enlarged vertical sectional view which disassembled the connection fixing part, (a) is a connection fixing part usually used for a blood vessel part, and (b) is a connection fixing part used for a small blood vessel part. 10 (a) is an operation explanatory view of the connecting and fixing portion, in which (a) is a state immediately before the adapter is attached to the blood vessel portion and connected to the connector, and (b) is a state of being connected and fixed to the connector. .. It is explanatory drawing of the simulated blood vessel which attached the discharge connection part and the waste liquid container. It is an enlarged plan view which disassembled the discharge connection part, (a) shows a blood vessel part, a 2nd adapter and a 2nd connector, and (b) shows an intermediate connection member and a connection member. It is an enlarged vertical sectional view of the discharge connection part. It is an operation explanatory view of the intermediate connection member and the connection connection member, (a) is the initial state which was closed by the shielding valve, and (b) is the state which opened the occlusion by breaking the shielding valve.

Hereinafter, embodiments of the injection practice tool according to the present invention will be described with reference to the accompanying drawings. In this description, the longitudinal direction of the mounting body 1 is the front-rear direction, the left back side of FIG. 1 is the front side or the base end side, and the right front side is the rear side or the tip side. Further, the direction orthogonal 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 form of the injection practice tool according to the present invention is the mounting body 1, the simulated subcutaneous tissue layer 2 arranged on the upper surface of the mounting body 1, and the upper part of the simulated subcutaneous tissue layer 2. It is provided with an upper cover 5 for stretching a simulated skin layer 4 to cover the skin. The simulated blood vessels 61 and 101 are arranged on the simulated subcutaneous tissue layer 2, and the simulated blood vessels 61 and 101 are searched for from the simulated skin layer 4 by covering the upper cover 5 for injection training (see FIGS. 3 and 4).

First, the mounting body 1 of the injection practice tool of the present invention will be described. The mounting body 1 has a substantially plate-shaped body made of a hard resin as a whole and has a shape curved into a ridge shape and an arch shape. As shown in FIG. 2, the inner side of the mounting body 1 having a ridge shape and an arch shape on the back surface side is open, and the opened inner portion is the arm through portion 42. The mounting body 1 can be used by placing it on a table while being mounted on the deck 40 as shown in FIG. 1, but as shown in FIG. 2, it can be removed from the deck 40 and used with the inner part of the mounting body 1. It is also possible to wrap the arm-passing portion 42 around the arm of the pseudo-employee.

When used by wrapping it around the arm of a pseudo-employee, it is used with the mounting body 1 removed from the deck shown in FIG. The mounting body 1 is mounted by wrapping the arm loop portion 42 around the arm at a position between the elbow joint of the arm and the wrist. Then, the injection needle can be pierced into the simulated blood vessel 101 from the surface (upper surface) of the simulated skin layer 4 of the upper cover 5 while being attached to the arm to practice blood vessel injection. By attaching it to the arm of the pseudo-employee, it is possible to imitate the blood vessel injection into the arm of the pseudo-employee facing each other, and it is possible to reproduce the individual difference of the pseudo-employee and the realism such as 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 formed into a ridge or arch shape as a whole by bending the central portion in the width direction in a ridge shape using a hard synthetic resin material such as ABS resin. By using such a hard material, not only the injection needle is prevented from penetrating the mounting body 1 when the practitioner mistakenly uses it, but also the simulated skin layer 4 and the simulated subcutaneous tissue layer 2 are removed. Since the whole and appearance are molded from a hard material, you can use it with confidence even if you have no experience in injection practice.

The mounting body 1 has standing pieces 31, 31 with both front and rear ends in the longitudinal direction standing upright. The surface of the mounting body 1 has two bending grooves 32, 32 which are bending changing means, from the standing piece 31 on the front side to the standing piece 31 on the rear side along the longitudinal direction. Notches 33, 33 notched at the positions of the front and rear standing pieces 31, 31 corresponding to the bent grooves 32, 32 are formed, and the arch form of the arch-shaped mounting body 1 can be widened or narrowed. can. This makes it possible to adjust the width, curved state, and arch state of the mounting body 1 according to the thickness of the arm of the pseudo-employee.

As shown in FIGS. 1 and 2, the mounting body 1 has a plurality of back arrangement portions 11 and 11 for arranging the simulated blood back 102 of the simulated blood vessel 101 on the posterior side of the standing piece 31 on the front side, and then a plurality of back arrangement portions 11 and 11 are arranged in the width direction. It has a connecting portion 64, which is a proximal portion of the conventional and new simulated blood vessels 61 and 101, and a proximal support portion 6 accommodating a connecting fixing portion 104 (see FIGS. 1 and 3) on the side, and a rush behind the connecting portion 64. A simulated subcutaneous tissue layer 2 formed in a plane shape is arranged, and a posterior standing piece 31 is arranged behind the simulated subcutaneous tissue layer 2.

The simulated subcutaneous tissue layer 2 is a salient arc-shaped or arch-shaped body that matches the curved shape of the upper surface of the mounting body 1, and has low resilience in order to reproduce the feel of the subcutaneous tissue and to withstand the deformation of the curved shape of the mounting body 1. It consists of a sex foam material. 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 removable, and its plane reaches 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. The simulated skin layer 4 covering the upper side of the simulated subcutaneous tissue layer 2 is stretched on the 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 thereof is cut off, and the simulated skin layer 4 is stretched. A presser foot 8 is formed on the front side of the upper cover 5, and a presser foot connecting portion 7 having both sides open in the width direction is formed between the upper cover 5 and the presser foot 8. The presser foot 8 is located above the back arrangement portions 11 and 11 described later with the upper cover 5 closed, and the presser foot connecting portion 7 is located 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 dry state (wetting condition) of the disinfecting alcohol can be visually confirmed, and the simulated skin layer 4 is in an unsterilized state where the drying is insufficient. You can prevent injections. Further, by using the urethane-based microcell polymer sheet, it is possible to confirm the unsterilized state from the expansion caused by alcohol.

The upper cover 5 has a locking claw 34 formed on the side of the side edge portion in the longitudinal direction as a means for fixing to the mounting body 1. On the other hand, a locked portion 35 is formed on the mounting main body 1, and the upper cover 5 can be detachably attached to the mounting main body 1 by engaging these portions.

Next, the simulated blood vessel arranged in the mounting body 1 will be described. As shown in FIG. 3, the conventional simulated blood vessel 61 has a blood vessel portion 63 and a simulated blood bag 62 connected and fixed by a connecting portion 64, and is supplied as a disposable one. The simulated blood bag 62 stores simulated blood in a bag (back) in the upper part of the drawing, and the proximal end portion of the bag 62 and the proximal end portion 63a 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 connecting portion 64 uses a resin molded product having substantially the same thickness (diameter) as the blood vessel portion 63.

In the new simulated blood vessel 101 that can be used in the present embodiment, as shown in FIG. 4, the blood vessel portion 103 and the simulated blood bag 102 are connected by the connecting fixing portion 104. Although the details will be described later, as shown in FIG. 11, the connector 105 is arranged at the proximal end portion 103a of the blood vessel portion 103, and the adapter 105 is screwed into the outflow tube 111 of the simulated blood bag 102. It is connected 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 outer diameter of the connector 106 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 thicknesses.

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 presence, and air does not enter the inside including the blood vessels 63 and 103. It is sealed with. By keeping air out of the simulated blood bags 62 and 102 and the blood vessels 63 and 103, it is possible to prevent air bubbles, which are a mixture of liquid and air, from entering the syringe when the practitioner pierces the needle. be able to. Further, by completely sealing the simulated blood bags 62 and 102, deterioration of the simulated blood bags 62 and 102 and the blood vessel portions 63 and 103 which are natural rubber can be prevented.

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

The recesses 13 and 13 are surrounded on both sides in the width direction by the side support walls 12a and 12a which are the side surfaces of the step portions 12 and 12, and there is a communication support portion 14 in the rear, but the front is open. The communication support portion 14 has width extension portions 14a and 14a in which the rear portions of the step portions 12 and 12 project so as to protrude in the direction of forming the recess, respectively, and the extension of the width extension portions 14a and 14a. Through holes 14b, 14b formed by notching downward from the upper edges of the communication support portions 14 and 14 and inclined toward the opposite width extension portions 14a and 14a are arranged. The inclined portion (outer edge of the through hole 14b) that is inclined and notched is curved downward to form a rounded V-shape, and the lower ends of the through holes 14b and 14b are the upper surface of the simulated subcutaneous panniculus 2. It is located below. The communication support portions 14 and 14 are not merely plate-shaped bodies, but have through-hole support surfaces 14c and 14c having a predetermined thickness in the front-rear direction and also having the same thickness in the portion notched so as to be inclined.

The width extension portions 14a and 14a of the communication support portions 14 and 14 support the connecting portions 64 and the connecting fixing portions 104 of the simulated blood vessels 61 and 101 arranged in the recesses 13 and 13 so as not to come out to the simulated subcutaneous tissue layer 2. However, the V-shaped through holes 14b and 14b allow the blood vessel portions 63 and 103 having different thicknesses (diameters) to be arranged. Moreover, the lower ends of the through holes 14b and 14b are located below the upper surface of the simulated subcutaneous tissue layer 2, and a gap is provided between the through holes 14b and 14b and the simulated subcutaneous tissue layer 2 in a predetermined anteroposterior direction. As a result, the play positions of the blood vessel portions 63 and 103 are secured, and the upper edge of the simulated subcutaneous tissue layer 2 is prevented from being damaged or damaged with the upper cover 5 closed. Generally, the blood vessel portion having a smaller diameter has a weaker strength, but the smaller the diameter of the blood vessel portion, the more it is supported downward by the communication support portions 14 and 14, and the damage is less likely to occur. Further, by forming the through hole support surfaces 14c, 14c having a predetermined length in the front-rear direction on the upper planes of the through holes 14b, 14b of the communication support portions 14, 14, the upper cover 5 in the through holes 14b, 14b is formed. The blood vessel portions 63 and 103 are supported without being damaged by pressing.

Further, the back arrangement portions 11 and 11 on the front side of the base end support portions 6 and 6 are formed on the lower surface of the mounting body 1, and a dent of a predetermined size is formed so that the simulated blood backs 62 and 102 do not shift. Will be done. Further, the standing piece 31 on the front side is formed with a support hole 31a for inserting and fixing the protruding piece arranged at the proximal end position of the simulated blood bags 62 and 102. The support hole 31a is in the form of a combination of a narrow hole on the upper side and a wide hole on the lower side so as to accommodate projecting pieces of different sizes.

The back arrangement portions 11 and 11 wrap the tourniquet band at the time of use, and the presser 8 formed on the front side of the upper cover 5 presses the plurality of simulated blood bags 62, 62, 102 and 102 at once. Can be done. When the presser foot 8 is pushed downward, the simulated blood bags 62 and 102 are pressed from above, and the internal pressure of the simulated blood filled therein is increased. 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 an actual angry state. In order to wind the tourniquet, both sides of the back arrangement portions 11 and 11 lined up in the mounting body 1 and both sides of the presser foot 8 are recessed holes for the tourniquet to easily hold the tourniquet. 15 is formed (see FIG. 1).

The cut portion 21 and the short groove 22 in the standing 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 and 33 corresponding to the bent grooves 32 and 32, and the notches 33 and 33 are between the notches 33 and 33, and the mounting main body is formed. An excised portion 21 is formed by cutting out the standing piece 31 downward at the position of the curved apex of 1. The cut portion 21 is wide unlike the notches 33 and 33, and is formed in a V shape inclined downward from the standing piece 31 and curved downward. The excision width is at least enough to pass through a thick blood vessel, preferably a width that allows a plurality of blood vessels 103 and 103 to pass through, and is about the same as the through hole 14b of the communication support portion 14 of the proximal support portion 6. preferable. By having this excision portion 21, it is possible to use the blood vessel portion 103 that is longer than the longitudinal direction of the mounting body 1. In addition to this, as shown in FIGS. 1 and 12, it is possible to provide a discharge connection portion 107, an intermediate connection portion 108, and a connecting member 109 on the distal end side of the blood vessel portion 103 for discharge, enabling administration-type training. Become.

Further, in the simulated subcutaneous tissue layer 2 near the excision portion 21 of the standing piece 31, a short groove 22 extending to the lower end of the excision portion 21 is formed. The short groove 22 preferably gradually descends from its base end (front end) to reach the lower end of the cut portion 21, and is preferably as wide as the width of the cut portion 21, but the base end is at a right angle. It may be one that descends to a right angle. The short groove 22 is arranged only in the vicinity of the standing piece 31 on the posterior side having the excision portion 21, and the other simulated subcutaneous tissue layer 2 does not have a groove shape.

The longitudinal length of the short groove 22 is about the same as the rising height of the standing piece 31, and is more preferably about 1/10 to 2 of the longitudinal length of the simulated subcutaneous tissue layer 2. It is one tenth of the same length. The depth of the short groove 22 has a depth at which the blood vessel portions 63 and 103 are completely immersed, and is deeper than the widthwise length of the short groove 22.

The formation of the short groove 22 prevents the blood vessel portion 103 discharged at the trailing end edge of the upper cover 5 from being damaged and damaged, and further, the blood vessel portion 103 is damaged at the excised portion 21 of the standing piece 31. It prevents it from occurring. Further, the simulated subcutaneous tissue layer 2 itself of the present embodiment does not have a groove for holding a blood vessel portion as in other products, and the blood vessel portion 103 can be freely crawled, and has a plurality of blood vessels and thicknesses. Different blood vessels can be arranged freely, and the user can feel the position of the blood vessels by groping. On the other hand, in some cases, the simulated blood bags 62 and 102 are pressed with the presser foot 8 to make the blood vessel portions 63 and 103 angry, and in this state, the blood vessel portion 103 is not damaged and the excision portion 21 is used. Need to be discharged. Therefore, it is preferable that the short groove 22 has a length necessary for immersing the swelling blood vessel portion 103 while making the short groove 22 as short as possible.

Further, as shown in FIG. 1, the mounting body 1 is provided with a deck 40 having a flat bottom surface for mounting on a desk or the like. The deck 40 is also provided with a deck cutting portion 23 at a position corresponding to the cutting portion 21 of the standing piece 31. By having this deck excision portion 23, even when the mounting body 1 is arranged on the deck 40 and practiced on a tabletop, it becomes possible to use a long blood vessel portion or perform administration-type practice.

Hereinafter, an example of a new simulated blood vessel that can be used in the injection practice tool of the present invention will be described with reference to FIGS. 4, 9 to 15. In this description, the left side on the drawing (for example, the simulated blood back side in FIG. 4) will be referred to as the proximal end side, and the right side on the drawing (for example, the blood vessel portion side in FIG. 4) will be referred to as the distal end side.

As shown in FIG. 4, the simulated blood vessel 101 includes a simulated blood bag 102 that stores simulated blood, a cylindrical, tubular and long blood vessel portion 103 that simulates a blood vessel, and a simulated blood bag 102 and a blood vessel portion 103. It is composed of a connecting fixing portion 104 for connecting and fixing. Although not particularly shown, the simulated blood is a liquid colored red to give a sense of presence, is injected into the simulated blood bag 102, and is sealed without air entering the inside of the simulated blood vessel 101. The simulated blood vessel 101 is discarded when it is used, and is a so-called disposable material.

As shown in FIG. 9, the connecting and fixing portion 104 of the simulated blood vessel 101 includes an adapter 105 and a connector 106, and after connecting the blood vessel portion 103 to the adapter 105, the simulated blood bag is included in the connector 106. 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 being communicated with each other in the simulated blood vessel 101. The blood vessel portion 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 includes a hollow rectangular storage portion 110 and a cylindrical outflow cylinder 111 protruding from one surface of the storage portion 110. The outflow tube 111 has an annular receiving portion 112 protruding inward from the inner circumference on the base end side (see FIG. 10). The receiving portion 112 receives and engages with the adapter 105, which will be described later, to position and fix it in the axial direction.

On the outer circumference of the outflow cylinder 111, there are two screw portions 113 protruding for fixing to the connector 106, which will be described later, and two protrusions extending downward from the central lower end of the storage portion 110, which is the base end side of the screw portion 113. It has locking portions 114 and 114. The locking portions 114 and 114 are on the front surface and the back surface of the outflow cylinder 111, and are arranged 180 degrees apart in the circumferential direction. The locking portions 114 and 114 are engaged with the locked portions 135 and 135 of the connector 106 in a state where the connector 106 is fixed (screwed) to the outflow cylinder 111, and the connector 106 is screwed. Is stopped, and the connector 106 is locked so as not to cause unexpected rotation in the locked state.

By connecting and fixing the simulated blood bag 102 and the blood vessel portion 103, the inside of the storage portion 110 and the blood vessel portion 103 communicate with each other, and the simulated blood can be supplied from the storage portion 110 into the blood vessel portion 103. The simulated blood bag 102 stores simulated blood in a negative pressure state on the positive pressure side of the vacuum collecting blood vessel, and while making it possible to supply simulated blood to the vacuum collecting blood vessel, liquid leakage from the needle hole generated in the blood vessel portion 103 due to blood sampling or the like. Is suppressed.

The blood vessel portion 103 will be described. The blood vessel portion 103 has a proximal end portion 103a that opens the proximal end side in the longitudinal direction and a distal end portion 103b that closes the other end side, and is a tubular object having a predetermined length, and the proximal end portion 103a is connected and fixed. It is connected to the simulated blood bag 102 by the tool 104. The blood vessel portion 103 is formed of a soft material such as an elastomer that can pierce an injection needle or a drip needle multiple times, and is bent and arranged in a free curve so that blood vessels having individual differences can be simulated. The blood vessel portion 103 has a thin radial thickness (half the difference between the inner diameter and the outer diameter) and is about 0.4 mm.

The connection fixing portion 104 will be described. As described above, the connecting / fixing portion 104 includes an adapter 105 for attaching and holding the blood vessel portion 103, and a connector 106 for connecting and holding the adapter 105 by screwing it into the outflow cylinder 111. The connection fixing portion 104 irreversibly fixes the blood vessel portion 103 to the simulated blood bag 102 by this connection, and communicates the inside of each other to form a flow path of the simulated blood.

The adapter 105 will be described. As shown in FIGS. 9, 10 and 11, the adapter 105 has a double-cylinder structure having an open end surface composed of an outer cylinder 121 and an inner cylinder 122. The adapter 105 has a space for inserting and holding the proximal end portion 103a of the blood vessel portion 103 in the space between the two cylinders 121 and 122. The radial thickness of this space (half the difference between the inner diameter and the outer diameter) is set to be about 0.44 mm as a dimension larger than the thickness of the blood vessel portion 103. It has a space in the longitudinal direction with both ends open on the inner circumference of the inner cylinder 122, and serves as a flow path for communicating the outflow cylinder 111 and the blood vessel portion 103.

The adapter 105 has an adapter base end portion 123 that is located at the base end side position and is inclined toward the outer circumference, and is slightly inclined inward from the tip end side of the adapter base end portion 123 to the opening side into which the blood vessel portion 103 is inserted. The extended outer cylinder 121 is formed. The outer cylinder 121 has a tapered shape in which the thickness gradually decreases from the adapter base end portion 123 side to the tip 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 tube 111 of the simulated blood bag 102, the adapter base end portion 123 formed in the shape of a conical cylinder having an inclined surface engages with the receiving portion 112 protruding into the outflow tube 111. Moreover, by biting into the adapter 105, the adapter 105 is positioned in the axial direction (longitudinal direction) and fixed. Further, as will be described later, by fixing (screwing) the connector 106 to the outflow cylinder 111 of the simulated blood bag 102, the outer cylinder 121 of the adapter 105 gradually inserts the proximal end portion 103a of the blood vessel portion 103. Tighten and fix.

In the present embodiment, as the blood vessel portion 103, as shown in FIG. 10A, the blood vessel portion 103 simulating a normal blood vessel is used, but a blood vessel portion having a diameter different from that of the normal blood vessel portion 103 can be used. .. FIG. 10B 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 microvessel portion 115 is 1.3 mm. The adapter also has an adapter 105 used for a normal blood vessel portion 103 and a thin adapter 105a for holding the small blood vessel portion 115.

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

Next, the connector 106 will be described. As shown in FIGS. 9, 10 and 11, the connector 106 has a cylindrical box-shaped (cap-shaped) form including an outer wall 131 and a bottom 132. The outer wall 131 has a threaded portion 131a projecting from the inner surface thereof toward the center, and is a nut-shaped object that is screwed and engaged with the threaded portion 113 of the outflow tube 111 of the simulated blood bag 102. The disk-shaped bottom portion 132 has an opening at the center position, and a through hole 133 through which the blood vessel portion 103 is inserted is formed. The connector 106 encloses and penetrates the adapter 105 in a state where the nut-shaped outer wall 131 is screwed into the threaded portion 113 of the outflow cylinder 111 and the base end portion 103a of the blood vessel portion 103 is held in the inner space of the outer wall 131. The blood vessel portion 103 is derived from the hole 133.

A protruding locking portion 134 extending from the periphery of the through hole 133 of the connector 106 toward the inside of the outer wall 131, in other words, protruding from the distal end side toward the proximal end side is formed. The protruding locking portion 134 has a tapered shape in which the thickness gradually decreases from the tip end side to the base end side. Further, the outer surface of the protruding locking portion 134 is formed horizontally, but the inner side surface is the outer surface. It is an inclined surface that inclines toward.

The protrusion locking 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 protrusion locking portion 134 has a tapered cylindrical shape, and the connector 106 is screwed into the outflow cylinder 111 with the adapter 105 equipped with the blood vessel portion 103 inserted into the outflow cylinder 111 of the simulated blood bag 102. Then, it is inserted from the tip of the tapered protruding locking portion 134 between the outer cylinder 121 of the adapter 105 and the inner peripheral surface of the outflow cylinder 111. The protruding locking portion 134, which gradually becomes thicker from the proximal end side to the distal end side, is inserted according to the screwing of the connector 106, so that the outer cylinder 121 of the adapter 105 is gradually pressed against the proximal end portion 103a 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 and 114 formed on the simulated blood bag 102 at the end edge opposite to the bottom 132. Stops 135 and 135 are formed. The concave shape of the locked portions 135 and 135 is such that the locking portions 114 and 114 of the ridges are positioned in the recessed portions in a state where the connector 106 is screwed into the outflow cylinder 111 of the simulated blood bag 102 to the deepest position. Then, it is positioned and fixed at the screwing completion position. Further, when the connector 106 is unexpectedly rotated by this engagement, the locking portions 114 and 114 of the ridges hit the recessed locked portions 135 and 135 of the connector 106, and the loosening of the connector 106 can be prevented.

As described above, the simulated blood bag 102 and the blood vessel portion 103 can be connected and fixed by the connecting and fixing portion 104 including the adapter 105 of the simulated blood vessel 101 and the connector 106. Since blood vessels of different diameters can be used, it is possible to practice with simulated blood vessels of various diameters. Further, the connector 106 and the simulated blood bag 102 (outflow tube 111) are used as common parts to reduce the number of parts, and since the connector 106 is connected and fixed so as to wrap the adapter 105, the connection fixing portion 104 is connected. It can be miniaturized so as not to interfere with the pressing of the simulated blood bag 102 or the training.

Next, in addition to the connection fixing portion 104 described above, a simulated blood vessel 101 (a second embodiment of a new simulated blood vessel) capable of performing administration training in addition to blood sampling training will be described. In the second embodiment, the adapter 105 and the connector 106 used in the first embodiment are arranged on the tip portion 103b of the simulated blood vessel 101 to practice administration such as infusion, and the adapter and the connector are shared. The number of parts can be reduced by using the above.

In the simulated blood vessel 101 (first embodiment) shown in FIG. 4, the proximal end portion is connected to the simulated blood bag 102 by the connecting fixing portion 104, and the distal end portion 103b is in a closed state. On the other hand, as shown in FIG. 12, in the simulated blood vessel 101 according to the second embodiment, the end portion 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 portion. It is formed and the discharge connection portion 107 is attached. The discharge connecting portion 107 of the second embodiment is attached with an intermediate connecting member 108 and a connecting member 109, one end of the waste liquid tube 143 is connected to the connecting member 109, and an external waste liquid container 141 is connected to the other end of the waste liquid tube 143. Therefore, the drug solution or the like administered to the blood vessel portion 103 can be discharged to the waste liquid container 141.

As shown in FIGS. 13, 14, and 15, the discharge connection portion 107 includes a second adapter 145 and a second connector 146, and the second adapter 145 has a form common to the first adapter 105. , The second connector 146 has a form common to that of the first connector 106. It is preferable to connect the waste liquid tube 143 via the intermediate connecting member 108 screwed into the second connector 146 and the connecting member 109 connecting the intermediate connecting member 108, but the discharge connecting portion 107 (second connector 146) is preferable. ) May be directly connected to the waste liquid container 141.

The second adapter 145 has the same shape as the first adapter 105 and is a common component. Similar to the first adapter 105, the outer cylinder 151, the inner cylinder 152, the adapter base end portion 153, the slits 154 and 154 are formed, and the tip portion 103b of the blood vessel portion 103 is formed in the space between the outer cylinder 151 and the inner cylinder 152. To hold.

The second connector 146 has the same shape as the first connector 106 and is a common component. Similar to the first connector, the outer wall 161, the threaded portion 161a, the bottom portion 162, the through hole 163, the protruding locking portion 164, and the concave locked portions 165 and 165 are formed, and the second connector 146 is connected to the intermediate connecting member 108. The same applies to the fact that the protruding locking portions 164 and 164 tighten the outer wall 161 inward as they are screwed into.

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

The inflow cylinder 171 has a threaded portion 174 having a thread formed on the outer periphery thereof. Further, it has ridge locking portions 175 and 175 protruding upward along the longitudinal direction on the front surface and the back surface of the collar 172a which is a part of the discharge portion 172 described later, and has a receiving portion 176 on the inner circumference on the base end side. have. These shapes and dimensions are the same as the threaded portion 113, the locking portions 114, 114, and the 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 with the second adapter 145 holding the blood vessel portion 103 inserted. Further, the locking portions 175 and 175 of the ridges allow the second connector 146 to be screwed until it reaches the recessed positions of the concave locked portions 165 and 165 of the second connector 146 and is locked. By engaging the locking portions 175 and 175 with the locked portions 165 and 165 of the second connector 146, it is possible to prevent the second connector 146 from loosening due to unexpected rotation or the like. It is the same as the first connector 106.

The discharge portion 172 of the intermediate connecting member 108 has a cylindrical shape concentric with the inflow cylinder 171 and is formed so as to project toward the opposite side of the inflow cylinder 171 in the longitudinal direction. The base end portion of the inflow cylinder 171 is composed of a collar 172a protruding outward in the shape of a regular hexagonal plate, a base portion 172b protruding cylindrically from the collar 172a, and a cylindrical connecting cylinder 172c further protruding from the tip of the base portion 172b. The connecting cylinder 172c has a threaded portion 172f formed of a thread on the surface thereof, and has the same outer diameter as the inflow cylinder 171.

The tip of the base portion 172b (the end on the side of the connecting cylinder 172c) has an annular convex portion 172d protruding outward, and two intermediate locking portions 172e and 172e for stopping the screwing of the connecting member 109 are convex from the flange 172a. It is formed in a protrusion. The intermediate locking portions 172e and 172e are formed on the front surface and the back surface, and are separated from each other by 180 degrees around the circumference.

The intermediate connection member 108 has a discharge flow path 173 that penetrates the center of the member in the longitudinal direction from the inflow cylinder 171 to the discharge portion 172, but shields the discharge flow path 173 inside the vicinity of the tip of the discharge portion 172. A thin film shielding valve 177 is arranged (see FIGS. 14 and 15). With this shielding valve 177, the state in which the tip portion 103b of the blood vessel portion 103 is closed can be maintained unless the connecting member 109 is screwed into the intermediate connecting member 108 to the completion position.

Next, the connecting member 109 will be described. As shown in FIGS. 14 and 15, the connecting member 109 has a cylindrical box-shaped (cap-shaped) shape including an outer wall 181 and a bottom portion 182. The outer wall 181 has a threaded portion 181a projecting from the inner surface thereof in the central direction, and is a nut-like object that is screwed and engaged with the threaded portion 172f of the discharge portion 172 of the intermediate connecting member 108.

The outer wall 181 has a partially recessed edge opposite to the bottom portion 182, and has two locked portions at positions corresponding to the intermediate locking portions 172e and 172e formed on the flange 172a of the intermediate connecting member 108. 183 and 183 are formed. The locking portions 183 and 183 prevent the connecting member 109 from unexpectedly rotating, and the screwed state can be continued. Further, on the edge opposite to the bottom portion 182 of the outer wall 181, a retaining protrusion 184 protruding from the peripheral edge toward the inner surface side is formed and engages with the annular convex portion 172d of the intermediate connecting member 108, and is within a certain range or more. I try not to pull it out.

The connecting member 109 includes a communication needle 185 that protrudes inward from the center of the circle of the bottom 182 toward the inside of the outer wall 181 and a joint pipe that also protrudes from the center of the circle of the bottom 182 to the opposite side of the communication needle 185. The unit 186 is arranged. The communication needle 185 has a tubular portion having a discharge flow path 187, which is a communication flow path, and a conical needle tip protruding from the tip thereof, and the communication needle 185 and the joint pipe portion 186 have an internal space. The discharge flow path 187 that communicates with the above is formed. The joint pipe portion 186 is a member having a burrs at the tip, and can be inserted into and connected to the waste liquid tube 143.

When the connecting member 109 is screwed into the intermediate connecting member 108, the communication needle 185 protruding inward of the connecting member 109 enters the discharge flow path 173 of the intermediate connecting member 108. Further, when the screwing is continued, the needle tip of the communication needle 185 breaks through the shielding valve 177 that closes the discharge flow path 173 of the intermediate connection member 108 described above. In this state, the discharge liquid discharged from the discharge flow path 173 of the intermediate connecting member 108 flows into the discharge flow path 187 of the connecting member 109 from the opening 185a formed in the communication needle 185, and the tip of the joint pipe portion 186. It is discharged from the opening 186a of.

As described above, the simulated blood vessel 101 of the second embodiment is directly connected to the waste liquid container 141 by arranging the discharge connection portion 107 including the second adapter 145 and the second connector 146 on the tip portion 103b. Further, 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 connecting member 108 is connected to the discharge connecting portion 107 and the intermediate connecting member 108 and the connecting member 109 are not completely screwed and left in a loosened state, the shielding valve 177 formed on the intermediate connecting member 108 is formed. As a result, the simulated blood vessel 101 is shielded by the tip end side. When the connecting member 109 is screwed into the intermediate connecting member 108 from this state, the communication needle 185 breaks through the shielding valve 177 and the waste liquid is discharged from the joint pipe portion 186 to the waste liquid container 141 via the waste liquid tube 143. Discharge. In this way, it is possible to switch only by the operation of screwing. This makes it possible to easily switch between the blood sampling training conducted in the blocked state and the administration training conducted in the drained state.

1 ... Mounting body, 2 ... Simulated subcutaneous tissue layer, 4 ... Simulated skin layer, 5 ... Top cover, 6 ... Base end support part, 7 ... Presser connection part, 8 ... Presser (blood vessel wrapping part), 11 ... back arrangement part, 12 ... step part, 13 ... recess, 13a ... side support wall, 14 ... connection support part, 14a ... width extension part, 14b ... through hole, 14c ... through hole support surface, 15 ... drive Blood vessel through hole, 21 ... excision part, 22 ... short groove, 23 ... deck excision part, 31 ... standing piece, 31a ... support hole, 32 ... bending groove, 33 ... notch, 34 ... locking part, 35 ... covered Locking part, 40 ... Deck, 42 ... Arm threading part, 61 ... Simulated blood vessel, 62 ... Simulated blood bag, 63 ... Blood vessel part, 64 ... Connecting part, 101 ... Simulated blood vessel, 102 ... Simulated blood bag, 103 ... Blood vessel part , 104 ... Connection fixing part

Claims (5)

A simulated subcutaneous tissue layer composed of a mounting body formed of a vertically long and curved arcuate hard material in the width direction, the inner side of which is an arm-passing portion, and a salient arc-shaped plane arranged on the mounting body, and the simulated subcutaneous tissue layer. With an upper cover, which has a simulated skin layer that covers from above,
A simulated blood vessel consisting of a simulated blood bag in which simulated blood is sealed and a tubular blood vessel portion can be arranged in the simulated subcutaneous tissue layer, and the blood vessel portion is tensioned by a presser that presses the simulated blood bag on the upper cover. It is an injection practice tool that can be used
The mounting body includes a plurality of back arrangement portions capable of arranging the simulated blood bag, and a plurality of proximal end support portions located behind the back arrangement portion and capable of supporting the proximal end portion of the blood vessel portion. Have,
The proximal support portion comprises lateral support walls on both sides and a rear communication support portion, and has a recess for accommodating the proximal end portion of the blood vessel portion.
The communication support portion is an injection practice tool having a through hole that is inclined from both sides so as to become narrower from the upper edge to the lower side. The communication support portion has two width extension portions toward each other from the side support walls on both sides, and a through hole inclined downward from each extension end of the two width extension portions to open a hole. Have and
The injection practice tool according to claim 1, further comprising a through-hole support surface capable of supporting a blood vessel portion on an upper plane notched in the through-hole. The injection according to claim 1 or 2, wherein the mounting body has an upright piece that stands up from the trailing edge, and a cut portion is formed by excising a salient arcuate apex portion at the center in the width direction of the upright piece. Practice tool. The injection practice tool according to claim 3, wherein the simulated subcutaneous tissue layer has a short groove formed from the surface to the lower end of the excision portion in the vicinity of the excision portion. The mounting body is removable to the deck that holds it in a curved, arcuate shape.
The injection practice tool according to claim 3 or 4, wherein a deck cut portion is formed on the deck at a position corresponding to the cut portion of the mounting body.

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