If vancomycin 1 g IVPB every 12 hours is sent in 200 mL 0.9% NS to infuse over 90 minutes, what is the mL/hr rate?

To determine the mL/hr rate for the vancomycin infusion, first, we need to know the total volume to be infused and the time over which it will be administered.

In this case, there are 200 mL of 0.9% Normal Saline (NS) that contains the vancomycin. The infusion is to be given over a period of 90 minutes.

To convert 90 minutes into hours, we divide by 60 (since there are 60 minutes in an hour):

90 minutes ÷ 60 = 1.5 hours

Next, we can calculate the infusion rate by dividing the total volume by the total time in hours:

200 mL ÷ 1.5 hours = 133.33 mL/hr

When rounding to a more commonly used infusion rate for clinical practice, this value is often approximated to 133 mL/hr.

Thus, the correct mL/hr rate for the infusion is 133 mL/hr, which aligns with the answer provided.