You are a nursing student on a community health clinical rotation. An 85-year-old woman is involved in a house fire. As she attempted to escape, she fell hit her head, and was briefly engulfed in flames and smoke before being rescued. She is now conscious but confused, lying on a stretcher outside the home. Her clothes are singed, and she has visible burns on her arms and chest, with labored breathing Which of the following signs would indicate a possible inhalation injury?