Verification of a Soft Tissue Replicate for Development Testing of Autoinjectors

Sammanfattning

At SHL Medical in Nacka, Sweden, autoinjectors are developed and during their development stage, the autoinjectors are tested on a soft tissue model made of gel. The gel however has challenges with robustness and customization. To eliminate these challenges, a soft tissuemodel of silicone was created. The aim of this project was to determine whether the two materials could generate the same results and, if therefore, the gel model was replaceable. Four different autoinjector models were chosen to be tested on four different silicone models with different geometry and stiffness. This was done to obtain a broad observation of how the silicone performed during testing. All autoinjectors were tested on all different silicone models and the gel model to compare their results. We could conclude that the silicone model generates similar results to the gel model and that the gel model can be replaced by the silicone model. Additionally, it was concluded which stiffness and geometry of the silicone model generates the most similar results to the gel model. Apart from this, the project gave guidance of how the silicone model can further be developed to better match the gel model.