An emergency oxygen supply is a crucial medical device used to provide supplemental oxygen to individuals in critical situations, such as medical emergencies, respiratory distress, or during transport. It typically consists of portable tanks or cylinders filled with compressed oxygen, along with delivery devices like masks or nasal cannulas. Emergency oxygen supplies are designed to be quickly accessible and easy to administer, enabling first responders, medical personnel, or bystanders to deliver oxygen promptly to those in need. They are essential in healthcare settings, ambulances, aircraft, and other environments where immediate oxygen therapy can stabilize patients and support their respiratory function until further medical treatment is available.