Final answer:
To administer 750 mg of a drug in 400 mL glucose 5% over 90 minutes, the infusion should be set to a flow rate of 266.67 mL/hr.
Step-by-step explanation:
The rate in ML/hr for administering 750 mg of a drug in 400 ML glucose 5% over 90 minutes can be calculated by first determining the flow rate required to administer the entire volume of 400 mL within the 90-minute time frame. To find the rate in mL/hr, use the formula:
Flow rate (mL/hr) = (Total Volume (mL) / Time (hr)).
Since we are given the time in minutes, we need to convert it to hours:
90 minutes = 1.5 hours.
Now, calculate the flow rate:
Flow rate (mL/hr) = (400 mL / 1.5 hours) = 266.67 mL/hr.
Therefore, the IV infusion should be set to a flow rate of 266.67 mL/hr to administer the drug in the specified time.