CPAP, or continuous positive airway pressure, is a device used to treat patients with breathing difficulties. It is commonly used in emergency medical services (EMS) for patients presenting with respiratory distress. CPAP helps to open up the airways and provide a constant flow of oxygen to the patient, reducing the need for intubation or ventilation. EMS providers, such as EMTs and paramedics, should consider using CPAP when patients are experiencing difficulty breathing and are not responding to other interventions. It can be a life-saving tool in the prehospital setting.