The invention relates to a detection system of an endo-urethral device for an artificial urinary sphincter implantable in the body of a patient, said sphincter comprising an occlusive cuff (2) adapted to compress the urethra, the bladder neck or the prostate of said patient, an activation device (5) of said cuff (2) and a control unit (6) adapted to control the activation device.Said system comprises at least one compression sensor (13) of the urethra and a posture sensor (9), and a processing unit (30) configured to determine:(i) if the compression parameter of the urethra exceeds a predetermined threshold during a predetermined period,(ii) if the patient is in a recumbent position.If the conditions (i) and (ii) are fulfilled, the processing unit sends to the activation device (5) an immediate reduction order of the compression exerted by the cuff (2).
