In assessing airway obstructions, which of the following signs suggests the airway may be blocked?

The presence of visible blood or foreign objects is a strong indicator that the airway may be obstructed. When assessing a casualty for airway patency, any foreign material visible in the mouth or throat is a critical finding. It suggests that something may be blocking the airway, which can lead to inadequate ventilation and oxygenation.

Additionally, visible blood can indicate trauma that could compromise airway integrity. In such cases, immediate action is required to clear the obstruction to ensure the airway is open, allowing for proper breathing. This aligns with the principles of Tactical Combat Casualty Care, which prioritize airway management as a fundamental step in lifesaving interventions.

Calm breathing and clear speech would suggest that the airway is likely patent, while absent sounds could indicate a serious obstruction, but the presence of visible blood or objects provides a direct, observable indication of airway compromise.