Order: Lidocaine IV to infuse at 7 mg/min. The solution available is 1.5 g of lidocaine in 125 mL D5W. Determine the IV flow rate in mL/hr. Round to the nearest tenths place where applicable and enter numeric value only (no commas or labels) ________ mL/hr

Step 1 is to convert the available grams to milligrams mg = grams × 1000 1.5 × 1000 = 1500 mg Step 2 is to calculate the concentration of the available solution mg per mL = Total mg ÷ Total mL 1500 ÷ 125 = 12 mg/mL Step 3 is to calculate the required milligrams per hour mg per hour = mg/min × 60 minutes 7 × 60 = 420 mg/hr Step 4 is to calculate the flow rate in mL per hour mL/hr = mg/hr ÷ mg/mL 420 ÷ 12 = 35 mL/hr Step 5 is to round to the nearest tenth 35 = 35.0 Answer: 35.0