Final answer:
The priority nursing action is to assess the heart rate and blood pressure.
Step-by-step explanation:
The priority nursing action in this scenario would be to assess the heart rate and blood pressure of the client. This is important because dobutamine is a medication that increases heart rate and blood pressure, so monitoring these vital signs is crucial to ensure the client's safety and well-being.
The nurse should calculate the correct dobutamine infusion rate based on the client's weight and the concentration of the solution to determine if the infusion pump rate of 20 mL/hour is appropriate. Subsequently, the priority nursing action depends on whether the rate is correct and could range from monitoring vital signs to discontinuation and notification of the healthcare provider.