[The complementary reasonable explorations to consider about young hypertensive patient. (With regard to 389 selection bed-rests in view of national service) (author's transl)].

About a retrospective study turning on 600 bed-rests during 3 years, the writers study 433 confirmed high blood pressures including 389 without therapeutic among which 67 p. 100 labil or limit H.B.P. and 33 p. 100 permanent H.B.P. By light of current ideas and withdrawn informations from complementary explorations done, they try to define a reasonable attitude concerning twenty years old young hypertensive male patients in view of selection. This attitude can be extended to the general field of young H.B.P. people. They establish that a good number of systemically researched elements are without great interest; functional signs, which are more the neurotonia witness than the H.B.P. consequence, heart or renal repercussion, negligible in this age, the too shematic distinction between permanent, labil or limit H.B.P. On the other hand, some parameters deserve to be searched : family antecedents (greater than 60 p. 100), obesity (approximately 20 p. 100), ocular repercussion (approximately 15 p. 100), perturbation of lipidemia, above all hypertriglyceridemia, hyperuricemia and urinary sediment abnomalies. As for I.V.U., in spite of an exact study of vascular times, and second reading by the same observer, it never allowed to display any renovascular H.B.P. Other pathologic uronephrologic established images are all almost associated to urinary sediment anomalies or to proteinuria. More, a few frequent incidents among young people and the price of the exam bring to purpose. I.V.U. only when H.B.P. context is hard or going with urinary signs. Other more specific exams (V.M.A., catecholamines) will be asked according to the context.