An implantable valve system and method of using same, including a housing witha resilientmembrane defining a reservoir in fluid communication with at least two ports,and at least a firstset of opposing sealing features disposed on upper and lower surfaces withinthe housing. Themembrane is capable of being depressed by a human finger to bring the sealingfeatures togetherto substantially restrict fluid from passing through at least one of one ofthe ports, and is capableof being depressed additionally by a rolling motion of the finger to drivefluid through the otherof the ports.
