Final answer:
The nurse should ensure suction equipment is at the bedside as the first intervention, as there is a risk of airway obstruction during certain medical procedures.
Step-by-step explanation:
The nurse should ensure suction equipment is at the bedside as the first intervention. This is because during certain medical procedures, such as induction of anesthesia, there is a risk of airway obstruction or the need for emergency suctioning. Having suction equipment readily available ensures that the nurse can quickly respond to any potential complications.
Assessing the client's vital signs and obtaining a serum phenytoin (Dilantin) level are important interventions, but they can be prioritized after ensuring the availability of suction equipment. Apply a cardiac telemetry monitor may also be necessary in certain situations, but it is not the first intervention to address the immediate risk of airway obstruction.