ATI RN
ATI Fluid Electrolyte and Acid-Base Regulation
1. Diagnostic testing has been ordered to differentiate between normal anion gap acidosis and high anion gap acidosis in an acutely ill patient. What health problem typically precedes normal anion gap acidosis?
- A. Metastases
- B. Excessive potassium intake
- C. Water intoxication
- D. Excessive administration of chloride
Correct answer: D
Rationale:
2. A nurse is caring for a client who has just had a central venous access line inserted. Which action should the nurse take next?
- A. Begin the prescribed infusion via the new access
- B. Ensure an x-ray is completed to confirm placement.
- C. Check medication calculations with a second RN.
- D. Make sure the solution is appropriate for a central line
Correct answer: B
Rationale:
3. . One day after a patient is admitted to the medical unit, you note that the patient is oliguric. You notify the acutecare nurse practitioner who orders a fluid challenge of 200 mL of normal saline solution over 15 minutes. This intervention will achieve which of the following?
- A. Help distinguish hyponatremia from hypernatremia
- B. Help evaluate pituitary gland function
- C. Help distinguish reduced renal blood flow from decreased renal function
- D. Help provide an effective treatment for hypertension-induced oliguria
Correct answer: C
Rationale:
4. The nurse is caring for a patient who is diaphoretic from a fever. The amount of sodium excreted in the urine will:
- A. Decrease
- B. Increase
- C. Remain unchanged
- D. Fluctuate
Correct answer: A
Rationale: Increased sweating (diaphoresis) causes the loss of sodium and other electrolytes from the body. As a result, the body tries to conserve sodium, leading to a decrease in the amount of sodium excreted in the urine. Choice B is incorrect because increased sweating results in sodium loss, not retention. Choice C is incorrect because with increased sweating, there is a need to conserve sodium, leading to a decrease in its excretion. Choice D is incorrect as there is a clear physiological response to sweating that results in a more consistent decrease in sodium excretion.
5. A nurse assesses a client who is admitted with an acid-base imbalance. The clients arterial blood gas values are pH 7.32, PaO2 85 mm Hg, PaCO2 34 mm Hg, and HCO3 16 mEq/L. What action should the nurse take next?
- A. Assess clients rate, rhythm, and depth of respiration.
- B. Measure the clients pulse and blood pressure.
- C. Document the findings and continue to monitor.
- D. Notify the physician as soon as possible.
Correct answer: A
Rationale:
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