Informed consent in research.

The relationship between physician and patient, as generally delineated by the Hippocratic Oath and the American Medical Association's 1994 Principles of Medical Ethics, is one between a fiduciary and a principal. In such a relationship, the duties of loyalty and trust run from the fiduciary to the principal. The fiduciary (physician) is the person to whom the relevant interests of the principal (patient) are entrusted. It is the medical best interests of the patient, not the physician, that are in trust. The relationship, while usually gratifying and financially rewarding, is essentially one of professional altruism. Nevertheless, the satisfaction of this fiduciary obligation requires the performance of general duties at levels dictated by the nature and scope of medical intervention.