A multidisciplinary approach to screening for a disorder of erection has been applied over the last 7 years and involves dynamic and particularly physiologic explorations. When an organic etiology cannot be excluded during the first consultation and after a clinical examination, the basic paraclinical investigation used is the measurement of nocturnal erections (NPT). Although NPT remains the key-examination, it may be necessary to request vascular exploration, mainly study of the Döppler effect, a neurologic examination to include peripheral and autonomic nervous systems and endocrine tests.