A male sexual impotence treatment apparatus comprises an operable restriction device (56) implanted in a patient and engaging the penile tissue (58) or the prolongation thereof to form a restrictable blood flow passageway through which blood flow leaves the penis. The restriction device is operable by an implanted operation device (60) to change the restriction of the blood flow passageway. A control device (62 and 64) is provided for controlling a source of energy, which may or may not be implanted, from outside the patient's body, to release energy for use in connection with the operation of the restriction device, i.e. to power the operation device. The patient uses the control device to restrict the blood flow leaving the penis to achieve erection.
