For a patient who has been vomiting, what data should the nurse collect?

• A. Time since last meal
• B. Number of times vomiting and the amount
• C. Type of content in the vomit
• D. Mood

Answer: (B)

The key idea is measuring fluid and electrolyte loss. When a patient has been vomiting, tracking how many times it has occurred and how much was expelled gives a direct estimate of volume loss. That information is essential for deciding how aggressively to rehydrate, whether IV fluids are needed, and how to monitor progress over time. It also helps gauge the risk of dehydration and electrolyte imbalances, which can guide decisions about laboratory tests and treatments.

While other data like how long it’s been since the last meal or what the vomit contains can be relevant in specific contexts (for example, aspiration risk or clues about the source of vomiting), they don’t provide the immediate, actionable measure of ongoing fluid loss as clearly as the frequency and volume do. Mood isn’t a primary factor in assessing acute fluid status.