A nurse is assuming care for a client who is receiving 0.9% sodium chloride 600 mL by continuous IV infusion over 6 hr. A nurse from the previous shift started the infusion at 1300, and the nurse notes at 1400 that 400 mL remains in the IV bag. The nurse should reset the IV infusion to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

To calculate the correct infusion rate, the nurse must determine how much fluid remains and how much time is left in the infusion. The infusion started at 1300 with 600 mL ordered over 6 hours, meaning it should finish at 1900. At 1400 — one hour into the infusion — the nurse notes only 400 mL remains in the bag. This means 200 mL has already infused in the first hour, but ideally only 100 mL should have infused in that first hour (600 mL ÷ 6 hr = 100 mL/hr), so the infusion is behind schedule. At 1400, there are 5 hours remaining until the scheduled completion time of 1900. The remaining volume is 400 mL. Dividing the remaining volume by the remaining time gives the new rate: 400 mL ÷ 5 hr = 80 mL/hr. The nurse should reset the pump to 80 mL/hr to deliver the remaining fluid within the prescribed timeframe. It would be incorrect to continue at 100 mL/hr because that would not finish the bag on time. Rounding to the nearest whole number is not needed here since the calculation yields a whole number: 80.