A device for treating urinary incontinence. The device comprising a body having a passage, for accommodating a urethra of a patient, extending from an inlet to an outlet of the device. The passage being configured so as to normally induce a flow obstruction in the urethra, following surgical implantation of the device. The flow obstruction, induced by the device, being sufficiently pliable and deformable so that once an internal system pressure within the urethra becomes sufficiently great, the internal system pressure overcomes the flow obstruction, induced by the device, and creates a flow passage through the device.
