The practice of the medical arts is more and more becoming framed by laws a
nd regulations. Concurrently, the civil liability in the medical field has
also been deeply changed, in particular by reversing the charge of proof of
the information given to the patient. After having been reminded of the pl
ace in the juridical arsenal of informed consent to a medical procedure, it
s value is discussed regarding the explanations given by the physicians. Gu
idelines for a forensic appraisal, with the aim of evaluating and appreciat
ing the information received by the patient, are proposed. Recent judiciary
decisions about refusal of care, especially blood transfusions, are discus
sed. (C) 1999 Editions scientifiques et medicales Elsevier SAS.