ATI RN
ATI Fluid Electrolyte and Acid-Base Regulation
1. . A nurse assesses a client who had an intraosseous catheter placed in the left leg. Which assessment finding is of greatest concern?
- A. The catheter has been in place for 20 hours.
- B. . The client has poor vascular access in the upper extremities.
- C. The catheter is placed in the proximal tibia.
- D. The clients left lower extremity is cool to the touch.
Correct answer: D
Rationale:
2. 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:
3. Retention of electrolytes (especially sodium) in the interstitial fluid can result from:
- A. decreased aldosterone secretion.
- B. increased ADH secretion.
- C. increased aldosterone secretion.
- D. decreased ADH secretion.
Correct answer: C
Rationale: The correct answer is C: increased aldosterone secretion. Aldosterone, a hormone produced by the adrenal glands, increases sodium reabsorption in the kidneys, leading to retention of sodium and water in the interstitial fluid. Increased aldosterone secretion enhances the reabsorption of sodium, thereby increasing its retention. Choice A is incorrect because decreased aldosterone secretion would lead to less sodium reabsorption and increased excretion. Choice B is incorrect because increased ADH secretion primarily affects water reabsorption rather than sodium. Choice D is incorrect because decreased ADH secretion would lead to increased water excretion but not necessarily affect sodium retention.
4. The nurse in the intensive care unit receives arterial blood gases (ABG) with a patient who is complaining of being 'short of breath.' The ABG has the following values: pH = 7.21, PaCO2 = 64 mm Hg, HCO3 = 24 mmol/L. The labs reflect:
- A. Respiratory acidosis
- B. Metabolic alkalosis
- C. Respiratory alkalosis
- D. Metabolic acidosis
Correct answer: A
Rationale: The ABG values indicate respiratory acidosis. A pH below 7.40, a PaCO2 above 40 mm Hg, and a normal HCO3 level (24 mmol/L) suggest respiratory acidosis. In this case, the patient has an acidic pH (7.21) and an elevated PaCO2 (64 mm Hg), indicating inadequate ventilation. The normal HCO3 level suggests that compensation by the kidneys has not occurred, implying an acute event. Choices B, C, and D can be ruled out based on the given ABG values and the criteria for acid-base disorders.
5. A nurse is caring for an older adult client who is admitted with moderate dehydration. Which intervention should the nurse implement to prevent injury while in the hospital?
- A. Ask family members to speak quietly to keep the client calm.
- B. Assess urine color, amount, and specific gravity each day.
- C. Encourage the client to drink at least 1 liter of fluids each shift.
- D. Dangle the client on the bedside before ambulating.
Correct answer: D
Rationale: The correct answer is to 'dangle the client on the bedside before ambulating.' This intervention helps prevent orthostatic hypotension, a drop in blood pressure when changing positions, which is crucial in preventing falls and related injuries in older adult clients. Asking family members to speak quietly (Choice A) may help keep the client calm but does not directly address the risk of injury. Assessing urine parameters (Choice B) is important for monitoring hydration status but does not specifically prevent injury. Encouraging increased fluid intake (Choice C) is essential for managing dehydration but does not directly address the risk of injury during ambulation.
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