For an order of 2 L of D5W half-normal saline to be infused over 48 hours, what is the hourly rate?

To determine the hourly infusion rate for 2 liters (L) of D5W half-normal saline to be infused over 48 hours, we first need to convert the volume from liters to milliliters, as IV rates are commonly calculated in mL/hr.

1 liter is equivalent to 1,000 milliliters. Therefore, 2 liters is equal to 2,000 milliliters (2 L × 1,000 mL/L = 2,000 mL).

Next, the total volume to be infused (2,000 mL) needs to be divided by the total time in hours (48 hours) to find the hourly rate:

Hourly rate = Total volume (mL) / Total time (hours)

Hourly rate = 2,000 mL / 48 hours = 41.67 mL/hr.

By rounding this to one decimal place, the answer is approximately 41.7 mL/hr. This matches the choice selected in the answer, confirming that it is the accurate calculation for the hourly infusion rate.