If a nurse flushes IV lines after each medication and does 4 flushes per day at 3 mL each, what is the daily flush volume?

• A. 9 mL
• B. 12 mL
• C. 15 mL
• D. 18 mL

Answer: (B)

The main idea is to multiply how many times you flush by the amount used per flush to get the total daily volume. If you flush four times a day and each flush is 3 mL, you multiply 4 by 3 to get 12 mL per day. This aligns with the given scenario and standard practice of using a small saline volume per flush to maintain IV patency. A different total would result from a different number of flushes (for example, three flushes would be 9 mL, five would be 15 mL, six would be 18 mL), but the described routine yields 12 mL.