ATI RN
ATI Fluid and Electrolytes
1. How would a decrease in blood protein concentration impact the fluid volumes?
- A. increase interstitial fluid volume.
- B. decrease blood plasma volume.
- C. decrease interstitial fluid volume.
- D. increase interstitial fluid volume and decrease blood plasma volume.
Correct answer: D
Rationale: A decrease in blood protein concentration would lead to a reduction in osmotic pressure, which is responsible for drawing fluid back into the capillaries. This decrease in osmotic pressure would result in an increase in interstitial fluid volume as fluid moves out of the capillaries, and a decrease in blood plasma volume as less fluid is drawn back into the circulation. Therefore, the correct answer is to increase interstitial fluid volume and decrease blood plasma volume. Choices A, B, and C are incorrect because they do not reflect the impact of decreased blood protein concentration on fluid volumes.
2. When planning the care of a patient with a fluid imbalance, the nurse understands that in the human body, water and electrolytes move from the arterial capillary bed to the interstitial fluid. What causes this to occur?
- A. Active transport of hydrogen ions across the capillary walls
- B. Pressure of the blood in the renal capillaries
- C. Action of the dissolved particles contained in a unit of blood
- D. Hydrostatic pressure resulting from the pumping action of the heart
Correct answer: D
Rationale:
3. What is the function of aldosterone?
- A. Regulates body temperature.
- B. Decreases blood pressure.
- C. Increases sodium reabsorption.
- D. Promotes water excretion.
Correct answer: C
Rationale: Aldosterone increases the reabsorption of sodium in the kidneys, which leads to an increase in blood volume and blood pressure. Choice A is incorrect as aldosterone does not regulate body temperature. Choice B is incorrect as aldosterone increases blood pressure by increasing sodium reabsorption. Choice D is incorrect as aldosterone promotes water retention by increasing sodium reabsorption.
4. 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:
5. The nurse is caring for a postthyroidectomy patient at risk for hypocalcemia. What action should the nurse take when assessing for hypocalcemia?
- A. Monitor laboratory values daily for an elevated thyroid-stimulating hormone.
- B. Observe for swelling of the neck, tracheal deviation, and severe pain.
- C. Evaluate the quality of the patient's voice postoperatively, noting any drastic changes.
- D. Observe for muscle twitching and numbness or tingling of the lips, fingers, and toes.
Correct answer: D
Rationale: Muscle twitching and numbness or tingling of the lips, fingers, and toes are signs of hyperirritability of the nervous system due to hypocalcemia. The other options describe complications the nurse should also be observing for; however, tetany and neurologic alterations are primary indications of hypocalcemia. Monitoring for an elevated thyroid-stimulating hormone (choice A) is not relevant in assessing for hypocalcemia. Observing for swelling of the neck, tracheal deviation, and severe pain (choice B) are more related to airway compromise. Evaluating the quality of the patient's voice postoperatively (choice C) is important but not a primary sign of hypocalcemia.
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