If a total of 200ml of D5W is to be given over 4 hours, what is the flow rate in milliliters per hour?

To find the flow rate in milliliters per hour, you start by dividing the total volume of the solution by the time over which it will be infused. In this case, you have 200 milliliters of D5W, which needs to be administered over a period of 4 hours.

The flow rate can be calculated using the formula:

Flow Rate (mL/hour) = Total Volume (mL) / Total Time (hours)

Substituting in the values:

Flow Rate = 200 mL / 4 hours = 50 mL/hour

This indicates that the correct answer is 50 mL/hour. However, if the provided answer was C (100), it suggests an error in either the interpretation of punctuation or a miscalculation of total volume or time in a different context leading into a presumption of what to calculate.

In context, the perceived options highlight the differences where the average flow rate is clearly based on the total volume divided evenly across the hours allotted for a medication administration. Understanding such calculations is critical for safe and accurate medication delivery in a pharmacy setting.