Which of the following could indicate an air embolism during IV therapy?

Sudden respiratory distress is a key indicator of an air embolism during IV therapy. An air embolism occurs when air bubbles enter the vascular system and travel to vital organs, particularly the lungs or brain. When air enters the circulatory system, it can impede blood flow and lead to various respiratory issues due to decreased oxygenation and potential lung complications. This distress can manifest as sudden difficulty in breathing, chest pain, or a feeling of panic. Recognizing respiratory distress as a symptom is crucial in order to respond promptly and appropriately to this potentially life-threatening situation.

The other options do not clearly indicate an air embolism. Increased blood pressure and excessive sweating can be symptoms related to various other medical conditions or responses but are not specifically associated with air embolism. Headaches, while they can occur in numerous contexts, are not singularly indicative of an air embolism and could result from stress, dehydration, or other factors. Therefore, sudden respiratory distress stands out as the most definitive sign that an air embolism may be occurring.