The present invention relates to a simulated human body model used for training of an intramuscular injection or the like.
An intramuscular injection needs to be administered at a correct position by making a puncture through the epidermis, dermis, and subcutaneous tissue to reach the muscular layer.
In order to newly secure personnel such as dentists, medical laboratory technicians, and the like for administering vaccination, there is a need to provide a simulated arm model, of a simple structure, having an evaluation function.
Considering the above situation, the purpose of the present invention is to provide a simulated human body model for injection training, which model being of a simple structure and capable of effecting a reliable evaluation function.
In order to achieve the above object, the following invention is provided.
(1) A simulated human body model for injection training, comprising:
(2) The simulated human body model for injection training of the above (1), further comprising
(3) The simulated human body model for injection training of the above (1), wherein
(4) The simulated human body model for injection training of the above (3), wherein
(5) The simulated human body model for injection training of the above (1), wherein
(6) The simulated human body model for injection training of the above (1), wherein
(7) The simulated human body model for injection training of the above (6), wherein
(8) The simulated human body model for injection training of the above (6), wherein
(9) The simulated human body model for injection training of the above (1), wherein
(10) The simulated human body model for injection training of the above (9), wherein
(11) The simulated human body model for injection training of the above (10), further comprising
(12) The simulated human body model for injection training of the above (2), wherein
(13) The simulated human body model for injection training of the above (12), wherein
(14) The simulated human body model for injection training of the above (5), wherein
The above and other configurations, operations, and effects of the present invention are described in the following Detailed Description of the Invention and the accompanying drawings such that those configurations, operations, and effects will be readily appreciated by those skilled in the art.
One embodiment of the present invention will be described below in detail with reference to accompanying drawings.
This injection training model has:
Here, in order to simulate the epidermis, dermis, and subcutaneous tissue, the layer 3 is formed of silicone rubber, or urethane, or hydrogel, or porcine dermal tissue.
Also, the layer 5 is a plate in which a target through hole 8 is formed at the correct puncture location 4, and in order to have a strength against (in order not to allow the pass-through of) the injection needle (indicated with 2′ in the figure) puncturing at a location other than the correct puncture location, a polypropylene plate having a thickness of, for example, 0.2 mm-1 mm is formed. Further, the through hole 8 preferably has an elliptical cross-section whose major axis is along the length of an arm, and desirably, the major axis length is 15-30 mm (preferably 25 mm) and the minor axis length is 5-20 mm (preferably 10 mm).
The layer 6 simulates a subcutaneous tissue section and/or a muscular layer. The material simulating the subcutaneous tissue is preferably formed of silicone rubber, or urethane, or hydrogel, or porcine dermal tissue. Also, the material simulating the muscular layer is preferably formed of silicone rubber, or urethane, or hydrogel, or porcine dermal tissue, respectively with a higher puncture resistivity and/or a friction coefficient than those of the subcutaneous tissue simulating material
This layer 6 may simulate only the subcutaneous tissue or only the muscular layer, or may simulate a structure defined by the subcutaneous tissue and the muscular layer stacked together. In the latter case, as shown in
Additionally, the layer 7 may be constructed of a material for providing resistance against the puncture of the injection needle 2, for example, a polypropylene plate similarly to the layer 5. Note that the distance from the surface of the layer 3 to this layer 7 (indicated by “b”
Also, indicated with 12 in the figure is a structure, provided in the layer 3, as a reference with which the trainee determines the correct puncture location.
For example, when an intramuscular injection of a novel coronavirus (COVID-19) vaccine is administered, the correct needle puncture location is the central part of deltoid, and this location is approximately three fingerbreadths below the acromion. If the inoculation site is too high, there is a risk of vaccine-related shoulder joint disorder, and if too low, there is a risk of radial nervous disorder, and therefore, caution must be taken in the puncture location.
The structure 12, taking this COVID-19 vaccine case as an example, provides the location of acromion, and it is positioned at a distance of approximately three fingerbreadths above the correct puncture location (indicated by “c” in the figure). Since this structure 12 needs to be detectable by the trainee palpating the layer 3 from its exterior side, the structure 12 is preferably formed of a material which is harder than the layer 3, or whose elastic modulus is lower than that of the layer 3.
Also, this structure, when viewed from outside, may have a shape simulating a human acromion, and may be formed integrally with the layer 3.
For example, the materials of the layers 3, 5, 6, 7, 10 and 11 are not limited to the ones described above. Particularly, as for the layer 5, it is important that it is “formed so that it disallows penetration therethrough by the injection needle puncturing at any puncture location other than the correct puncture location,” and any material satisfying the requirement may be used. Here, “it disallows penetration” means, when a typical puncture technique is performed with a typical puncture force of a practitioner, it has enough rigidity to disallow penetration.
Also, in this one embodiment, each of the above layers had a uniform thickness and a flat shape, each may have a non-uniform thickness and a curved shape.
Further, in this embodiment, the through hole 8 was provided at the correct puncture location in the layer 5, but instead of being a hole, this through hole 8 may be a site formed of a material provided with a different hardness than that of other parts and penetrable by the injection needle. Moreover, the through hole 8 of the above embodiment was elliptical shape, but it may take other shapes, for example, circular, square, or rhombic shape.
Now, a second embodiment of the present invention will be described, as a specific embodiment example of the above first embodiment as a basic configuration, with reference to
A configuration shown in
Here, the skeletal structure 15, as shown in
Additionally, as shown in
In addition, in this second embodiment, as shown in
According to such a configuration, since each of the layer 5′ and the layer 7′ is curved in its mid section to protrude towards the first layer, when the layer 3′ is pushed in by a finger, for example, the layer 5′ and the layer 7′ may provide elasticity so that they will bias in the push-back direction, enabling more realistic training.
Note that the layer 3′ and the layer 5′ do not need to be glued to the first and second skeletal structures 16 and 17, but only need to be detachably attached with their respective upper end sections simply secured to the skeletal structures 16 and 17 by clips or the like. Thus, after a needle puncture training is finished, the next user training may be conducted only by changing the layer 3′ and the layer 6′ with the skeletal structures 16 and 17 remaining “as is.”
Further, needless to say, the present invention is not limited by the above first and second embodiments, and that various changes and modifications can be made without departing from the scope and spirit of the present invention.
For example, the above embodiment was directed to training of intramuscular injection, but it may be directed to other types of injection, or puncture training of other medical instruments.
Number | Date | Country | Kind |
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2021-096981 | Jun 2021 | JP | national |
2021-109775 | Jul 2021 | JP | national |
Filing Document | Filing Date | Country | Kind |
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PCT/JP2022/023028 | 6/8/2022 | WO |