An airway obstruction is a blockage in the tubes that convey air from the nose and mouth to the lungs. It can be partial or complete, and acute or chronic. Causes include foreign objects, infections, trauma, and respiratory conditions. Symptoms include difficulty breathing, gasping, and cyanosis. Diagnostic tests include x-rays and scoping of the airway. Management depends on whether the obstruction is partial or complete, and may involve clearing secretions, repositioning, intubation, or ventilation. Nurses monitor breathing and provide supportive care. Prevention focuses on habits that reduce choking risks.