What is the correct infusion rate for cefazolin 2 gm in 100 mL of normal saline over 20 minutes?

To determine the correct infusion rate for administering cefazolin 2 gm in 100 mL of normal saline over 20 minutes, it's essential to calculate the rate in mL per hour.

First, the total volume to be infused is 100 mL. The infusion duration is 20 minutes, which can be converted to hours for calculating the rate per hour:

20 minutes is equivalent to 20/60 hours, which simplifies to 1/3 hour or approximately 0.333 hours.

Next, the infusion rate can be calculated using the formula:

Infusion Rate (mL/hr) = Total Volume (mL) / Time (hr).

Applying the values:

Infusion Rate = 100 mL / (1/3 hr) = 100 mL × 3 = 300 mL/hr.

Therefore, the correct infusion rate for cefazolin when given in these parameters is 300 mL/hr.