A device 1 for diverting fluid from the ventricles of the brain to another area of the body comprises: an inlet 2 an outlet 4 and a resistance member 6, operatively connected to the inlet 2 and the outlet 4, the resistance member 6 comprising: a first plate 10, a surface of which comprises a groove which defines a resistance flow channel, an entry of the flow channel being in fluid communication with the inlet 2 and an exit of the flow channel being in fluid communication with the outlet 4 and a second plate 8, the second plate being held in abutment with the grooved surface of the first plate 10 so as to define a resistance tube 16. The resistance tube 16 comprises a plurality of arcs 17 arranged in flow series, each arc radially extending between the inner and outer diameters of the first and second plates. A selection means 40 operable to interconnect a selected number of the arcs to the inlet and outlet is provided.
