What should the nurse set the electronic infusion device to for a patient receiving 1000 mL of 0.45% normal saline over 12 hours after 4 hours into the infusion?

To determine the correct infusion rate after 4 hours of a 1000 mL IV fluid delivery over a total of 12 hours, you first need to calculate how much fluid should have been infused in the initial 4 hours and then determine how much fluid remains for the following time.

Initially, the total volume of the infusion is 1000 mL, and the total time scheduled for the infusion is 12 hours. This leads to a required rate of infusion if it were to run continuously from the start:

1000 mL ÷ 12 hours = approximately 83.33 mL/hr.

After infusing for 4 hours at this initial rate of around 83.33 mL/hr, the total volume infused by that point would be:

4 hours × 83.33 mL/hr = approximately 333.33 mL.

Next, subtract this volume from the total volume to find out how much fluid remains to be infused:

1000 mL - 333.33 mL = approximately 666.67 mL left.

Now, there are 8 hours remaining in the infusion schedule since 12 hours total minus the 4 hours that have already passed leaves 8 hours. To find the new infusion