Final answer:
The rate of noradrenaline being delivered to a patient weighing 75 kg at a flow rate of 2.2 ml/hour with a concentration of 160 mcg/ml is 176 mcg/min.
Step-by-step explanation:
To calculate the rate of noradrenaline being delivered in mcg/min, first find the total mcg delivered per hour by multiplying the volume delivery rate by the concentration, then convert that rate to mcg per minute.
Total mcg per hour = volume rate (ml/hour) × concentration (mcg/ml)
Total mcg per hour = 2.2 ml/hour × 160 mcg/ml
Total mcg per hour = 352 mcg/minute
Since there are 60 minutes in an hour, divide the total mcg per hour by 60 to get mcg per minute:
Rate in mcg/min = Total mcg per hour ÷ 60
Rate in mcg/min = 352 mcg/min
Therefore, the correct answer is B) 176 mcg/min.