Question

A client is to receive Lidocaine 2 grams in 250 mL of D5W. The order is to infuse at 60 mL/hr. Calculate the mg/hr and the mg/min the client will receive.

A) 24 mg/hr, 0.4 mg/min
B) 30 mg/hr, 0.5 mg/min
C) 36 mg/hr, 0.6 mg/min
D) 42 mg/hr, 0.7 mg/min

Answer 1

To find the infusion rate in mg/hr and mg/min of Lidocaine, we first convert the dose to mg and then calculate the rates. The correct calculation gives 480 mg/hr and 8 mg/min, which does not match any provided options, suggesting an error in the given choices.

Step-by-step explanation:

The question asks to calculate the mg/hr and mg/min of Lidocaine a client will receive when infused at a rate of 60 mL/hr with a concentration of 2 grams in 250 mL of D5W. First, convert grams to milligrams: 2 grams = 2000 mg. Since the total volume is 250 mL, we find the concentration in mg/mL by dividing the total milligrams by the total volume: 2000 mg / 250 mL = 8 mg/mL. Next, we calculate mg/hr by multiplying the flow rate (60 mL/hr) by the concentration (8 mg/mL): 60 mL/hr × 8 mg/mL = 480 mg/hr. To find mg/min, divide this number by 60 minutes/hr: 480 mg/hr / 60 min/hr = 8 mg/min. This is not one of the provided options, indicating there may be an error in the question or the provided options.