This document discusses the concept of consent in a medical context. There are three main types of consent: implied consent, expressed consent, and informed consent. Informed consent is the most comprehensive, requiring that the patient understands the nature, risks, and alternatives of a procedure before agreeing. The document then outlines 17 rules related to obtaining proper consent from patients for various medical procedures and treatments. It also discusses the related concept of informed refusal, where a patient understands recommendations but declines treatment.