1. Nurses in critical care units face many ethical issues, such as obtaining informed consent from critically ill patients, using physical restraints, and determining how long to continue life support. 2. It is important for nurses to consider ethical principles like accountability, reasonability, and justice when providing care. 3. Legally, nurses must avoid intentional torts like assault or battery, and unintentional torts such as negligence, which could include abandonment of a patient or malpractice.