How do you identify a casualty with a partially blocked airway?

To identify a casualty with a partially blocked airway, look for signs such as difficulty breathing, wheezing, or gasping for air. The person may also exhibit abnormal sounds, such as stridor or choking noises, and display distress or panic. Additionally, they might be unable to speak or communicate effectively, and their skin may show signs of cyanosis, particularly around the lips and fingertips. Immediate assessment and intervention are crucial to ensure the airway is cleared.