If 125ml of 1/4NS solution is to be infused over 3.5 hours, what is the flow rate in milliliters per hour?

To determine the flow rate in milliliters per hour, you first need to calculate the total volume of the solution to be infused, which is 125 mL. The time for infusion is given as 3.5 hours.

The flow rate can be calculated using the formula:

[

\text{Flow Rate} = \frac{\text{Total Volume}}{\text{Total Time}}

]

Substituting the given values:

[

\text{Flow Rate} = \frac{125 \text{ mL}}{3.5 \text{ hours}}

]

To perform the division, you can either divide directly or convert 3.5 hours to a fraction to make the math easier. Dividing 125 by 3.5 results in approximately 35.71 mL per hour, which can be rounded to 35.7 mL per hour for simplicity.

Thus, the correct flow rate is 35.7 mL per hour, making it the right choice in this scenario. This calculation is essential in ensuring that the solution is administered at the proper rate over the desired duration, which is critical for patient safety and effectiveness of treatment.