ATI LPN
Fundamentals of Nursing Care: Concepts, Connections & Skills
Chapter 28 : Respiratory Care Questions
Question 1 of 5
Your patient has a blood pH of 7.48 and is on oxygen at 8 L/min. Which oxygen delivery device is best for this patient?
Correct Answer: B
Rationale: A Venturi mask delivers precise oxygen concentrations, ideal for a patient with alkalosis (pH 7.48) to avoid over-oxygenation.
Question 2 of 5
The health-care provider asks for a stat pulse oximetry reading on a patient wearing dark nail polish. What action will you take first?
Correct Answer: D
Rationale: Dark nail polish can interfere with pulse oximetry readings, so removing it from one nail ensures accuracy.
Question 3 of 5
When you look at the arterial blood gas results on your patient, you see that his pH is 7.32. What concern do you have for this patient?
Correct Answer: B
Rationale: A pH of 7.32 indicates acidosis, as it is below the normal range of 7.35-7.45.
Question 4 of 5
Which is (are) true of chemical regulation of respirations?
Correct Answer: A,C,D,F
Rationale: Chemoreceptors in the carotid arteries, aorta, and brain monitor CO?, O?, and pH levels to regulate breathing. Rising CO? lowers blood pH, triggering the brain's chemoreceptors to increase the rate and depth of respirations. Peripheral chemoreceptors respond to low oxygen by signaling the medulla. In healthy people, CO? is the main drive to breathe, while in those with chronic lung disease, low oxygen becomes the primary trigger. Respiratory control is managed by the medulla, not the cerebellum.
Question 5 of 5
A patient who has chronic lung disease is stimulated to breathe because the chemoreceptors detect:
Correct Answer: A
Rationale: In patients with chronic lung disease (such as COP
D), the body becomes accustomed to high levels of carbon dioxide, so the usual CO?-driven respiratory drive is blunted. As a result, low oxygen levels become the primary stimulus to breathe?this is called a hypoxic drive.