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. A nurse is planning care for a client who is hyperventilating. The clients arterial blood gas values are pH 7.30, PaO2 94 mm Hg, PaCO2 31 mm Hg, and HCO3 26 mEq/L. Which question should the nurse ask when developing this clients plan of care?
- A. Do you take any over-the-counter medications?
 - B. You appear anxious. What is causing your distress?
 - C. Do you have a history of anxiety attacks?
 - D. You are breathing fast. Is this causing you to feel light-headed?
 
Correct answer: B
Rationale:
3. A client at risk for developing hyperkalemia states, 'I love fruit and usually eat it every day, but now I can't because of my high potassium level.' How should the nurse respond?
- A. Potatoes and avocados can be substituted for fruit.
 - B. If you cook the fruit, the amount of potassium will be lower.
 - C. Berries, cherries, apples, and peaches are low in potassium.
 - D. You are correct. Fruit is very high in potassium.
 
Correct answer: C
Rationale: The correct answer is C. Berries, cherries, apples, and peaches are indeed low in potassium, making them suitable choices for someone at risk for hyperkalemia. Choice A is incorrect because potatoes and avocados are high in potassium and should be avoided in this situation. Choice B is incorrect because cooking fruit does not significantly lower its potassium content. Choice D is incorrect as it provides incorrect information, as not all fruits are very high in potassium.
4. . A medical nurse educator is reviewing a patients recent episode of metabolic acidosis with members of the nursing staff. What should the educator describe about the role of the kidneys in metabolic acidosis?
- A. The kidneys retain hydrogen ions and excrete bicarbonate ions to help restore balance.
 - B. The kidneys excrete hydrogen ions and conserve bicarbonate ions to help restore balance
 - C. The kidneys react rapidly to compensate for imbalances in the body
 - D. The kidneys regulate the bicarbonate level in the intracellular fluid.
 
Correct answer: B
Rationale:
5. Which negative ion is most abundant in blood plasma?
- A. Bicarbonate
 - B. Chloride
 - C. Hydroxide
 - D. Phosphate
 
Correct answer: B
Rationale: Chloride (Cl-) is the most abundant anion in blood plasma. It plays a crucial role in maintaining osmotic balance and acid-base homeostasis. Bicarbonate (Choice A) is important for buffering acids in the body but is not the most abundant negative ion in blood plasma. Hydroxide (Choice C) is not typically found in high concentrations in blood plasma. Phosphate (Choice D) is an important anion in the body but is not as abundant as chloride in blood plasma.
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