Barbara | BSN, RN on Instagram: "Comment “CODE” for a free Code Blue study guide that breaks down roles, steps, and medications involved in a code When you hear “Code Blue” overhead, it means one thing: a patient is in cardiac or respiratory arrest. Within seconds, the code team rushes in — compressions start, the crash cart is opened, IV access is secured, and advanced airway support begins. For nursing students, here are the basics: - Code Blue = no pulse / no breathing - Immediate CPR + defib