What situation does "Code Blue" indicate?

"Code Blue" is universally recognized in medical settings as an alert indicating a cardiac or pulmonary arrest. This term is crucial for signaling the need for immediate resuscitation efforts and mobilizing emergency response teams, including doctors, nurses, and other healthcare professionals trained in advanced cardiac life support (ACLS). The prompt activation of "Code Blue" ensures that life-saving measures, such as CPR and defibrillation, are initiated swiftly to improve the chances of patient survival during these critical emergencies.

In this context, the other options represent different emergencies that do not fall under the definition of "Code Blue." Severe weather, internal disasters, and patient fall responses pertain to other protocols focused on safety and emergency management but do not require the immediate clinical interventions associated with a cardiac or pulmonary arrest. Thus, referring to "Code Blue" specifically captures the urgency and seriousness of situations involving life-threatening events related to heart and lung function.