[The anatomical-clinical observations of R.T.H. Laennec's Service at the Hôpital Necker (1816-1819)].

It is through Laennec's students observations, revised by himself, that we are able to follow his medical knowledge strides. Starting from the first mediate auscultation (1817) it shows the raising prevalence of physical marks against functional ones. It starts by the impairing of human voice sounds and tackles abnormal breathing murmurs; all these are combined with every other investigating process as percussion. Nevertheless, some failings appear about cardiology which is occasionally defective. Very complete autopsies give now famous descriptions of pulmonary emphysema and atrophic cirrhosis. Such a documentation shows how high a value Laennec and his followers were setting on anatomo-clinical method though they admitted its limit.