ATI RN
ATI Fluid Electrolyte and Acid-Base Regulation
1. After providing discharge teaching, a nurse assesses the clients understanding regarding increased risk for metabolic alkalosis. Which statement indicates the client needs additional teaching?
- A. . I dont drink milk because it gives me gas and diarrhea
- B. I have been taking digoxin every day for the last 15 years
- C. . I take sodium bicarbonate after every meal to prevent heartburn
- D. In hot weather, I sweat so much that I drink six glasses of water each day.
Correct answer: C
Rationale:
2. An increase in capillary blood pressure would tend to:
- A. increase interstitial fluid volume.
- B. increase plasma volume.
- C. decrease interstitial fluid volume.
- D. increase plasma volume and decrease interstitial fluid volume.
Correct answer: A
Rationale: An increase in capillary blood pressure leads to a higher force pushing fluid out of the capillaries into the interstitial space, thereby increasing interstitial fluid volume. Choice B is incorrect because capillary blood pressure affects the movement of fluid into the interstitial space, not into the plasma. Choice C is incorrect as an increase in capillary blood pressure would not decrease interstitial fluid volume. Choice D is incorrect as it combines contradictory effects when capillary blood pressure increases.
3. Which positive ion is most prevalent in intracellular fluid?
- A. Calcium
- B. Potassium
- C. Sodium
- D. Magnesium
Correct answer: B
Rationale: The correct answer is Potassium (K+). Potassium is the predominant cation found within cells, making it the most prevalent positive ion in intracellular fluid. Calcium, sodium, and magnesium are also essential ions in the body, but they are not as abundant in intracellular fluid. Calcium is vital for bone health and muscle function, sodium helps in maintaining fluid balance and nerve function, and magnesium is involved in numerous biochemical reactions.
4. Place a washcloth between the skin and tourniquet
- A. Provide a bed bath instead of letting the client take a shower
- B. Use sterile technique when changing the dressing.
- C. Disconnect the intravenous fluid tubing prior to the clients bath.
- D. Use a plastic bag to cover the extremity with the device
Correct answer: D
Rationale:
5. A patient with a longstanding diagnosis of generalized anxiety disorder presents to the emergency room. The triage nurse notes upon assessment that the patient is hyperventilating. The triage nurse is aware that hyperventilation is the most common cause of which acid-base imbalance?
- A. Respiratory acidosis
- B. Respiratory alkalosis
- C. Increased PaCO2
- D. CNS disturbances
Correct answer: B
Rationale: The correct answer is B: Respiratory alkalosis. Hyperventilation, which can be caused by extreme anxiety, is the most common cause of acute respiratory alkalosis. This leads to a decrease in PaCO2 levels. Respiratory acidosis, choice A, occurs in conditions like hypoventilation, leading to an increase in PaCO2 levels. Choice C, Increased PaCO2, is not the correct term for an acid-base imbalance related to hyperventilation. Choice D, CNS disturbances, is not directly related to the acid-base imbalance caused by hyperventilation.
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