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PPI - High-Precision Autoinjector for Extremely Viscous Formulations
The development of the Precision Pen Injector (PPI) is a story of uncompromising dedication to meeting industry challenges. A Swedish company specializing in solutions for aesthetics and corrective treatment sought to introduce an autoinjector for its skin booster – a highly viscous hyaluronic acid formulation of several hundred centipoise. The company needed a device that could deliver small and very precise doses of this treatment while addressing the challenges the filler market did not have at the time, such as drooling and overdosing.
To meet these challenges, our design engineers created the Rotaject®, a patented clock spring technology that made it possible for a mechanically driven injector to deliver small (10 μL) and consistent dosages of highly viscous formulations for up to 200 times from a 2.25 mL pre-filled syringe. Working with various study groups, we developed a user-friendly device that maintained a balance between its shape and weight versus its mechanical properties. The result was the PPI – a sleek and aesthetically pleasing pen injector that went on to win the prestigious Red Dot Design Award for product design in 2009.