Rethinking Human Factors in Obesity: Development of Simulation and Physical Test Models of Human Soft Tissue to Study Autoinjector Activation Performance.

Activation against a hard surface according to ISO 11608-1 is not always representative of device use on a soft injection site. A softer injection site - which is an anthropometric property found in obese patients - presents a distinct viscoelastic property which can lead to greater autoinjector activation forces that are not captured in standardized activation testing methodology. Soft tissue simulation and physical testing were developed at SHL to advance the development of autoinjectors, allowing for rigorous testing and challenging these in scenarios involving even the softest injection sites.