Ethical principles are not laws, but guiding principles about what is good and what is bad, that should direct doctors and other health care professionals in their work and decision making. Issues arising over end-of-life care involving decisions that affect the nature and timing of an individual's death raise difficult ethical conflicts for all concerned and can be a source of discord between health professionals within a team, health professionals and family members, or between different family members. Ethical dilemmas arise when there is a perceived conflicting duty to the patient, such as a conflict between a duty to preserve life and a duty to act in a patient's best interests, or when an ethical principle such as respect for autonomy conflicts with a duty not to…