Nokea
. 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: The correct answer is C: Help distinguish reduced renal blood flow from decreased renal function.
Rationale:
1. Oliguria is a decrease in urine output.
2. Fluid challenge with normal saline can help determine the cause of oliguria by assessing the response of the kidneys.
3. If the oliguria improves after the fluid challenge, it suggests reduced renal blood flow as the cause.
4. If oliguria persists, it indicates decreased renal function.
Summary:
A. Fluid challenge does not directly help in distinguishing between hyponatremia and hypernatremia.
B. Evaluating pituitary gland function requires specific tests, not just a fluid challenge.
D. Treating hypertension-induced oliguria may involve different interventions, not just a fluid challenge.
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The nurse is assessing the patient for the presence of a Chvosteks sign. What electrolyte imbalance would a
positive Chvosteks sign indicate?
- A. Hypermagnesemia
- B. Hyponatremia
- C. Hypocalcemia
- D. Hyperkalemia
Correct Answer: C
Rationale: Step 1: Chvostek's sign is a facial muscle spasm induced by tapping the facial nerve in hypocalcemia.
Step 2: Hypocalcemia causes increased neuromuscular excitability, leading to Chvostek's sign.
Step 3: Hyperkalemia (choice D) causes muscle weakness, not muscle spasm.
Step 4: Hyponatremia (choice B) affects osmolarity, not neuromuscular excitability.
Step 5: Hypermagnesemia (choice A) causes muscle weakness, not muscle spasm.
A nurse is caring for a client who is experiencing excessive diarrhea. The clients arterial blood gas values are pH 7.28, PaO2 98 mm Hg, PaCO2 45 mm Hg, and HCO3 16 mEq/L. Which provider order should the nurse expect to receive?
- A. Furosemide (Lasix) 40 mg intravenous push
- B. Sodium bicarbonate 100 mEq diluted in 1 L of D5W
- C. Mechanical ventilation
- D. Indwelling urinary catheter
Correct Answer: B
Rationale: The correct answer is B: Sodium bicarbonate 100 mEq diluted in 1 L of D5W. In this case, the client is experiencing metabolic acidosis due to low HCO3 levels (16 mEq/L) with a low pH (7.28). Sodium bicarbonate helps correct metabolic acidosis by increasing the HCO3 levels. Furosemide (A) is a diuretic and can worsen the client's electrolyte imbalance. Mechanical ventilation (C) is not indicated for metabolic acidosis. Indwelling urinary catheter (D) does not address the underlying acid-base imbalance. Therefore, the nurse should expect the provider to order sodium bicarbonate to correct the metabolic acidosis.
A nurse is caring for a client who is receiving an epidural infusion for pain management. Which assessment finding requires immediate intervention from the nurse?
- A. Redness at the catheter insertion site
- B. Report of headache and stiff neck
- C. Temperature of 100.1 F (37.8 C)
- D. Pain rating of 8 on a scale of 0 to 10
Correct Answer: B
Rationale: The correct answer is B: Report of headache and stiff neck. This finding indicates a potential complication of epidural anesthesia called a post-dural puncture headache, which can lead to serious consequences like meningitis or subdural hematoma. The nurse should act immediately by notifying the healthcare provider for further evaluation and management. Redness at the catheter insertion site (A) may indicate local inflammation but doesn't require immediate intervention. Temperature elevation (C) could be a sign of infection but isn't as urgent as a headache and stiff neck. Pain rating of 8 (D) is important but doesn't indicate an immediate threat to the client's health like a post-dural puncture headache.
A gerontologic nurse is teaching students about the high incidence and prevalence of dehydration in older adults.
What factors contribute to this phenomenon? Select all that do not apply.
- A. Decreased kidney mass
- B. Decreased renal blood flow
- C. Decreased excretion of potassium
- D. Increased conservation of sodium
Correct Answer: D
Rationale: The correct answer is D: Increased conservation of sodium. Older adults tend to have an increased conservation of sodium, leading to fluid retention and decreased fluid intake, which can contribute to dehydration.
A: Decreased kidney mass is incorrect because it is a factor that can contribute to decreased kidney function but not directly linked to dehydration.
B: Decreased renal blood flow can impact kidney function but is not a direct cause of dehydration in older adults.
C: Decreased excretion of potassium is not a factor that directly contributes to dehydration in older adults.
You are an emergency-room nurse caring for a trauma patient. Your patient has the following arterial blood gas results: pH 7.26, PaCO2 28, HCO3 11 mEq/L. How would you interpret these results?
- A. Respiratory acidosis with no compensation
- B. Metabolic alkalosis with a compensatory alkalosis
- C. Metabolic acidosis with no compensation
- D. Metabolic acidosis with a compensatory respiratory alkalosis
Correct Answer: D
Rationale: To interpret the given ABG results:
1. pH <7.35 indicates acidosis.
2. PaCO2 <35 indicates respiratory alkalosis.
3. HCO3 <22 indicates metabolic acidosis.
Therefore, the ABG results show metabolic acidosis (low pH, low HCO3) with compensatory respiratory alkalosis (low PaCO2). This means the body is trying to compensate for the metabolic acidosis by decreasing PaCO2 through hyperventilation. Option D is correct. Options A, B, and C are incorrect as they do not align with the ABG results and the principles of acid-base balance.