Author Question: The nurse is teaching the mother of a child diagnosed with attention-deficit hyperactivity disorder ... (Read 88 times)

KimWrice · **on:** Jul 23, 2018

The nurse is teaching the mother of a child diagnosed with attention-deficit hyperactivity disorder how to administer methylphenidate (Ritalin). When would the nurse instruct the mother to administer this drug?

A) Administer at lunch every day.
B) Administer at breakfast every day.
C) Administer at dinner every day.
D) Administer at bedtime.

Question 2

The nurse is caring for a patient with severe coronary artery disease (CAD) who is experiencing chest pain because the oxygen demand exceeds supply. What forces could potentially be lowered to reduce oxygen consumption? (Select all that apply.)

A) Pulse pressure
B) Afterload
C) Stretch on the ventricles
D) Heart rate
E) Preload

jackie · **Reply #1 on:** Jul 23, 2018

Answer to Question 1

B
Feedback:
Several long-acting formulations of methylphenidate have become available that allow the drug to be given only once a day. It should always be given in the morning because administration at dinnertime or bedtime could result in insomnia.

Answer to Question 2

B, C, D, E
Feedback:
The primary forces that determine the heart's use of oxygen or oxygen consumption include: Heart rate (the more the heart has to pump, the more oxygen it requires), preload (the more blood that is returned to the heart, the harder it will have to work to pump the blood around), afterload (the higher the resistance in the system, the harder the heart will have to contract to force open the valves and pump the blood along), and stretch on the ventricles (if the ventricular muscle is stretched before it is stimulated to contract, more actomyosin bridges will be formed, which will take more energy). Pulse pressure does not impact oxygen consumption.