ATI RN
ATI Fluid Electrolyte and Acid-Base Regulation
1. A nurse is caring for a client who has just experienced a 90-second tonic-clonic seizure. The clients arterial blood gas values are pH 6.88, PaO2 50 mm Hg, PaCO2 60 mm Hg, and HCO3 22 mEq/L. Which action should the nurse take first?
- A. . Apply oxygen by mask or nasal cannula
- B. Apply a paper bag over the clients nose and mouth.
- C. Administer 50 mL of sodium bicarbonate intravenously.
- D. Administer 50 mL of 20% glucose and 20 units of regular insulin.
Correct answer: A
Rationale:
2. Which hormone reduces the amount of water in the body?
- A. ADH
- B. aldosterone
- C. ANH
- D. ADH and aldosterone
Correct answer: B
Rationale: The correct answer is 'aldosterone.' Aldosterone is the hormone that reduces the amount of water in the body by increasing the reabsorption of sodium and water from the kidney tubules. ANH (atrial natriuretic hormone) actually works to increase the excretion of sodium and water by the kidneys, leading to a reduction in blood volume and pressure. ADH (antidiuretic hormone) works to increase water reabsorption by the kidneys, thereby increasing blood volume. Therefore, choices A (ADH) and D (ADH and aldosterone) are incorrect in the context of reducing the amount of water in the body.
3. A nurse in the neurologic ICU has orders to infuse a hypertonic solution into a patient with increased intracranial pressure. This solution will increase the number of dissolved particles in the patients blood, creating pressure for fluids in the tissues to shift into the capillaries and increase the blood volume. This process is best described as which of the following?
- A. Hydrostatic pressure
- B. Osmosis and osmolality
- C. Diffusion
- D. Active transport
Correct answer: B
Rationale:
4. Which organ has the greatest effect on fluid output?
- A. Kidneys
- B. Lungs
- C. Skin
- D. Intestines
Correct answer: A
Rationale: The correct answer is the kidneys. The kidneys are primarily responsible for regulating fluid balance by filtering blood and adjusting the volume and concentration of urine. The lungs primarily regulate gas exchange, not fluid balance. The skin plays a role in temperature regulation and protection but is not the primary organ for fluid output. The intestines are mainly involved in the absorption of nutrients and water, rather than fluid output.
5. 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:
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