To infuse the prescribed 400 mg dose of gatifloxacin, which comes in two 200 mg bags of 200 mL each, the rate of infusion for each bag should be 200 mL per hour to complete the infusion over a 2-hour period.
The question involves calculating the rate of infusion for a medication. Since Mrs. Salinas has been prescribed 400 mg of gatifloxacin and the pharmacy has provided 200 mg in a 200 mL bag, two bags are needed to complete the infusion of the full 400 mg dose. The prescribed duration for the infusion is 2 hours. Therefore, to deliver 400 mg of gatifloxacin over 2 hours, with each 200 mg contained in a 200 mL bag, the infusion rate for each bag needs to be calculated.
Since each 200 mL bag needs to be infused over 60 minutes (1 hour), the infusion rate is simply 200 divided by the number of hours, which is:
Infusion rate = 200 mL / 1 hour = 200 mL per hour.
So, to administer a total of 400 mg of gatifloxacin over a 2-hour period using two 200 mg bags, the rate of infusion for each bag of 200 mL is 200 mL per hour.