Multi-Layer Injection Training Model with Puncture Verification
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Solution Overview
Problem
Current training methods for intramuscular injections lack a reliable and effective simulated human body model that can accurately simulate the correct puncture location and depth, leading to potential errors in administering vaccinations.
Innovation Solution
A simulated human body model with multiple layers, including a surface layer, a layer that prevents incorrect punctures, a subcutaneous tissue layer, and a muscular layer, along with a structure to indicate the correct puncture location, providing a realistic and evaluative training experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simulated human body model with multiple layers is created to enable reliable evaluation of injection training, then the training reliability and evaluation capability are improved, but the device complexity increases
Solution Approach 1:
The simulated human body model is divided into multiple distinct layers: a first layer simulating epidermis and dermis, a second layer simulating subcutaneous tissue, and a third layer simulating muscular tissue. Each layer has different material properties and thicknesses to accurately represent human anatomy, enabling reliable evaluation of injection techniques while maintaining manageable complexity through functional segmentation.
Solution Approach 2:
Different regions of the simulated model have locally optimized properties - the first layer has specific elasticity and thickness for skin simulation, the second layer has different mechanical properties for subcutaneous tissue, and the third layer has properties matching muscular tissue. This local differentiation enhances training realism and evaluation accuracy without requiring the entire model to be uniformly complex.
2Measurement precision
If the second layer is designed to prevent penetration at incorrect locations, then the measurement precision of puncture location is improved, but the device complexity increases
Solution Approach 1:
The second layer is pre-configured with a through-hole at the correct puncture location before training begins. This preliminary preparation ensures that only injections at the precise anatomical location can penetrate through all layers, providing immediate feedback to trainees about correct vs. incorrect puncture sites without requiring complex real-time evaluation systems.
Solution Approach 2:
The second layer acts as an intermediary barrier between the first layer (skin) and third layer (muscle). By placing a through-hole at the correct location in this intermediate layer, the model creates a controlled penetration path that verifies both correct location and sufficient depth, enhancing measurement precision while maintaining simple layered structure.
3Adaptability or versatility
If the third layer simulates subcutaneous tissue and muscular layer, then the realism of the training model is improved, but the ease of manufacture decreases
Solution Approach 1:
The complex muscular and subcutaneous tissue simulation is achieved by segmenting the third layer into distinct regions with different material properties. One portion simulates subcutaneous tissue while another simulates muscular layer, allowing each region to be manufactured separately and then assembled, reducing overall manufacturing difficulty while maintaining high training realism.
Solution Approach 2:
The third layer utilizes composite material construction to simulate the complex properties of subcutaneous tissue and muscular layer. By combining materials with different elastic moduli, densities, and mechanical properties, the model achieves anatomical realism without requiring a single complex material that would be difficult to manufacture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The model ensures trainees can accurately identify the correct puncture location and depth, reducing the risk of errors in administering injections, such as vaccine-related disorders, by simulating the human body's layers and providing tactile feedback.
Implementation Method 1
the second layer is configured to provide elasticity when the first layer is pressed toward the second layer
Implementation Method 2
the second layer comprises a curvature maintaining means for maintaining the plate section, whose middle section is bowed to protrude towards the first layer, in its bowed state
Data Source
AI summary
To provide a simulated human body model for injection training with a simple structure capable of effecting a reliable evaluation function. There is provided a simulated human body model for injection training, comprising: a first layer 3 for simulating a surface layer of a human body, into which an injection needle makes a puncture externally; a second layer 5, stacked on the first layer 3, and formed so that it disallows penetration therethrough by the injection needle 2′ puncturing at any puncture location other than a correct puncture location 4, for causing a trainee to detect an incorrect puncture location; and a third layer 6, stacked on the second layer 5, for simulating subcutaneous tissue receiving the injection needle 2 which penetrated the second layer 5.