The engineer nowadays needs to possess knowledge that will enable the design of more diverse and cheaper products, but of higher quality, which reach the market faster, and do not pollute. These requirements are the effect of globalization, competition, reduction of the life-cycle of a product, managing the environmental issues, increasing computing power related to communication networks etc. The present paper proposes research applying technical functional analysis for the development of a surgical device manufactured from biocompatible silicone rubber. The vacuum surgical device is a treatment instrument for skin ulcers resistant to antibiotics and difficult to treat because of other connected diseases. The product is fabricated by open mould casting in a selective laser sintered (additive manufactured) mould, obtained after performing functional analysis. Functional analysis is applied to establish the optimum mould concept and the technological process of manufacturing it. Additive manufacturing is used for both the intermediary functional prototype production of the mould and the zero series mould.