Flow switching device for catheterization with a three way catheter comprising: - a housing (7) having four opening (11, 12, 13, 14)； - a first, second and third distal hydraulic conduit (1, 2, 3), originating at the first, second and third opening (11, 12, 13), respectively； - switching means 20 engaging with the housing from obtaining a first operative configuration, wherein the first and third opening (11,13) are in communication； a second operative configuration, wherein the second and fourth opening (12, 14) are in communication； a third operative configuration, wherein the first and second opening (11, 12) are in communication； a fourth operative configuration wherein the second and third opening (12,13) are in communication； and - hydraulic bifurcation (17) comprising: a respective proximal hydraulic branch (6) originating from said fourth opening (14), a fourth and fifth distal hydraulic conduit (4, 5) originating distally from said proximal hydraulic branch and which are fluid dynamically communicating with respect to each other.Mevcut buluş, hususi olarak ürolojide olmak üzere, bir akışkanın, tercihen bir hastanın gövdesi içindeki bir sıvının akışının yönetilmesinin gerekli olduğu, hususi olarak da üç yollu bir mesane kateterinin kullanılmasının gerekli olduğu sağlık prosedürlerinde kullanılabilen tıbbi cihazlar alanı ile ilgilidir.
