The nurse is performing a respiratory assessment of a patient who has been experiencing episodes of hypoxia. The nurse is aware that this is ultimately attributable to impaired gas exchange. On what factor does adequate gas exchange primarily depend?
A) An appropriate perfusion–diffusion ratio
B) An adequate ventilation–perfusion ratio
C) Adequate diffusion of gas in shunted blood
D) Appropriate blood nitrogen concentration
Ans: B
Feedback:
Adequate gas exchange depends on an adequate ventilation–perfusion ratio. There is no perfusion–diffusion ratio. Adequate gas exchange does not depend on the diffusion of gas in shunted blood or a particular concentration of nitrogen.
You might also like to view...
The neonatal nurse explains to new parents that infants are at greater risk for fluid and electrolyte imbalance than are older children. Which of the following parent comments would indicate that further education is needed?
1. "Infants have a higher metabolic rate than older children do." 2. "An infant has little body water for reserve, as compared with an adult." 3. "Infants lose water through their skin, and they have a larger proportion of skin surface area than older children do." 4. "Infants maintain their temperature by losing heat through their heads."
A client visits an urgent care center and tells the nurse he has had nausea and vomiting for 3 days and thinks he has the flu. The nurse should assess the client for symptoms of:
A) adequate carbohydrate intake. B) chronic fatigue. C) vitamin C deficiency. D) dehydration.
A patient is diagnosed with acute hemorrhage from esophageal varices. Which of the following should the nurse suspect as the cause for this diagnosis?
1. gastritis from NSAIDs use 2. reflux esophagitis 3. gall stones 4. portal hypertension with shunting of blood
When interviewing with the nurse recruiter, the new nurse should be prepared to ask about:
a. Timing of evaluations. b. Benefits. c. Patient mix of unit. d. Length of orientation.