Research Information System
Ingenieria e Investigacion, vol.45, no.1, 2025 (SCI-Expanded, Scopus)
This study presents a comprehensive approach to the redesign of auto-injection syringe systems, employing the TRIZ problem-solving framework along with Ishikawa analysis. The proposed design aims to address common challenges, including usability issues, high production costs, complex assembly procedures, and hygiene considerations. By leveraging the TRIZ methodology, this work successfully identified and addressed technical contradictions, leading to the development of an innovative auto-injection syringe. This design incorporates a recyclable polypropylene random copolymer, which not only reduces manufacturing costs but also promotes environmental sustainability. Replacing flexible springs with inexpensive rubber bands enhances the design's affordability and usability. This change lowers costs and improves user-friendliness, allowing patients to operate the system more easily while upholding performance standards. According to engineering validations carried out through static and dynamic simulations in NX Nastran, the design safely withstands up to 10 N of applied force, with its maximum stress levels remaining below 5.2 MPa, well within the material’s 27.5 MPa yield strength. While prior studies have reported ergonomic or functional improvements, they often lack a systematic engineering approach to address design contradictions. This study fills that gap by uniquely integrating the TRIZ and Ishikawa approaches to develop an optimized, user-friendly, and sustainable autoinjector. As a result, our new design meets user needs and adheres to the industry’s safety and efficacy standards. This research underscores the effectiveness of integrating the aforementioned methodologies to create practical and efficient solutions for patients requiring regular self-injection, thereby contributing to improved healthcare outcomes and a more sustainable medical device industry.