NURS 6550 FINAL – COMPREHENSIVE QUESTIONS AND ANSWERS | VERIFIED AND
WELLDETAILED ANSWERS | DETAILED EXPLANATIONS AND RATIONALES | COMPLETE
EXAM PREPARATION STUDY GUIDE | PRACTICE QUESTIONS | LATEST EXAM UPDATE
• *
CORE DOMAINS
• Acute cardiovascular disorders and emergencies
• Pulmonary and respiratory disorders
• Renal and genitourinary disorders
• Gastrointestinal and hepatobiliary disorders
• Neurologic disorders and emergencies
• Hematologic disorders and thromboembolic disease
• Endocrine and metabolic disorders
• Infectious disease, sepsis, and multisystem illness
• Critical care assessment, diagnosis, and management
• Advanced-practice clinical reasoning, safety, and professional decision-making
INTRODUCTION
This comprehensive NURS 6550 assessment is designed to reinforce advanced-practice
knowledge and clinical reasoning related to the care of adults with acute, complex, and
potentially life-threatening conditions. The questions assess recognition of clinical findings,
differential diagnosis, interpretation of diagnostic information, pathophysiology, treatment
principles, pharmacologic and nonpharmacologic management, complications, and
appropriate clinical decision-making. Multiple-choice questions emphasize both foundational
knowledge and application to realistic patient situations. Effective preparation requires
understanding why an answer is correct rather than relying solely on memorization. The
material is intended to support examination preparation while strengthening the clinical
reasoning required for safe, evidence-informed acute-care practice.
SECTION ONE: QUESTIONS 1–100
Question 1.
A 68-year-old patient develops oliguria after major surgery. His blood pressure is 88/54
mmHg, mucous membranes are dry, and his BUN is 42 mg/dL with a creatinine of 1.4 mg/dL.
Which type of acute kidney injury is most likely?
A. Postrenal acute kidney injury
B. Prerenal acute kidney injury
C. Intrinsic renal injury from glomerulonephritis
D. Acute interstitial nephritis
,Correct Answer: B. Prerenal acute kidney injury
Explanation: Prerenal AKI results from inadequate renal perfusion. Hypotension, volume
depletion, and a disproportionately elevated BUN relative to creatinine support this
diagnosis. Prompt restoration of renal perfusion is essential.
Question 2.
A patient with chronic obstructive pulmonary disease presents with increasing dyspnea.
Which arterial blood gas pattern is most consistent with chronic respiratory acidosis with
renal compensation?
A. pH 7.50, PaCO₂ 30 mmHg, HCO₃⁻ 23 mEq/L
B. pH 7.25, PaCO₂ 60 mmHg, HCO₃⁻ 25 mEq/L
C. pH 7.36, PaCO₂ 55 mmHg, HCO₃⁻ 30 mEq/L
D. pH 7.48, PaCO₂ 48 mmHg, HCO₃⁻ 34 mEq/L
Correct Answer: C. pH 7.36, PaCO₂ 55 mmHg, HCO₃⁻ 30 mEq/L
Explanation: Chronic CO₂ retention causes respiratory acidosis. The kidneys compensate by
retaining bicarbonate, bringing the pH toward the normal range. The elevated PaCO₂ and
bicarbonate with near-normal pH are characteristic.
Question 3.
A patient presents with crushing substernal chest pain radiating to the left arm and
diaphoresis. The ECG demonstrates ST-segment elevation in leads II, III, and aVF. Which
coronary artery is most commonly associated with this pattern?
A. Right coronary artery
B. Left main coronary artery
C. Left anterior descending artery
D. Circumflex artery exclusively
Correct Answer: A. Right coronary artery
Explanation: Inferior STEMI involving leads II, III, and aVF most commonly results from right
coronary artery occlusion, although the circumflex artery can also cause an inferior
infarction.
Question 4.
Which finding is most characteristic of left-sided heart failure?
A. Ascites and hepatomegaly
B. Peripheral edema and jugular venous distention
C. Pulmonary crackles and orthopnea
D. Dependent sacral edema alone
,Correct Answer: C. Pulmonary crackles and orthopnea
Explanation: Left ventricular failure causes pulmonary venous congestion, producing
dyspnea, orthopnea, paroxysmal nocturnal dyspnea, and pulmonary crackles. Right-sided
failure more commonly produces systemic venous congestion.
Question 5.
A patient with atrial fibrillation is being evaluated for stroke prevention. Which mechanism
explains why atrial fibrillation increases thromboembolic risk?
A. Increased ventricular contractility
B. Blood stasis within the atria
C. Increased coronary artery perfusion
D. Decreased systemic vascular resistance
Correct Answer: B. Blood stasis within the atria
Explanation: Ineffective atrial contraction causes blood stasis, particularly in the left atrial
appendage. Stasis promotes thrombus formation, which can embolize and cause ischemic
stroke.
Question 6.
A patient with acute decompensated heart failure has severe pulmonary edema and
hypoxemia. Which intervention should receive the highest priority?
A. Encourage oral fluid intake
B. Place the patient supine
C. Support oxygenation and ventilation
D. Administer a high-sodium meal
Correct Answer: C. Support oxygenation and ventilation
Explanation: Severe pulmonary edema threatens gas exchange. Immediate attention to
airway, breathing, and oxygenation is prioritized while definitive treatment, such as diuresis
and afterload reduction when appropriate, is initiated.
Question 7.
Which finding is most suggestive of pulmonary embolism?
A. Gradual onset of bilateral ankle edema
B. Sudden dyspnea with pleuritic chest pain
C. Chronic productive cough
D. Slow respiratory rate with hypercapnia
Correct Answer: B. Sudden dyspnea with pleuritic chest pain
, Explanation: Pulmonary embolism often presents with sudden dyspnea, pleuritic chest pain,
tachycardia, and hypoxemia. Presentation can vary, but abrupt respiratory symptoms should
raise concern in an appropriate risk setting.
Question 8.
A patient with suspected pulmonary embolism becomes hypotensive and develops severe
hypoxemia. Which complication is most concerning?
A. Massive pulmonary embolism causing obstructive shock
B. Mild ventilation-perfusion mismatch
C. Chronic bronchitis
D. Stable pulmonary hypertension
Correct Answer: A. Massive pulmonary embolism causing obstructive shock
Explanation: A large embolus can acutely obstruct pulmonary blood flow, increase right
ventricular afterload, decrease left ventricular preload, and cause hypotension and
obstructive shock.
Question 9.
Which diagnostic test is commonly used to evaluate pulmonary vasculature for suspected
pulmonary embolism in a hemodynamically stable patient?
A. CT pulmonary angiography
B. Plain abdominal radiography
C. Noncontrast head CT
D. Echocardiography alone
Correct Answer: A. CT pulmonary angiography
Explanation: CT pulmonary angiography is a commonly used definitive imaging study for PE
in appropriate patients. Clinical probability and renal function must be considered when
selecting diagnostic testing.
Question 10.
A patient with COPD has increasing somnolence, respiratory distress, and an elevated PaCO₂.
Which condition should be suspected?
A. Respiratory alkalosis
B. Hypercapnic respiratory failure
C. Metabolic alkalosis
D. Isolated hypovolemia
Correct Answer: B. Hypercapnic respiratory failure
WELLDETAILED ANSWERS | DETAILED EXPLANATIONS AND RATIONALES | COMPLETE
EXAM PREPARATION STUDY GUIDE | PRACTICE QUESTIONS | LATEST EXAM UPDATE
• *
CORE DOMAINS
• Acute cardiovascular disorders and emergencies
• Pulmonary and respiratory disorders
• Renal and genitourinary disorders
• Gastrointestinal and hepatobiliary disorders
• Neurologic disorders and emergencies
• Hematologic disorders and thromboembolic disease
• Endocrine and metabolic disorders
• Infectious disease, sepsis, and multisystem illness
• Critical care assessment, diagnosis, and management
• Advanced-practice clinical reasoning, safety, and professional decision-making
INTRODUCTION
This comprehensive NURS 6550 assessment is designed to reinforce advanced-practice
knowledge and clinical reasoning related to the care of adults with acute, complex, and
potentially life-threatening conditions. The questions assess recognition of clinical findings,
differential diagnosis, interpretation of diagnostic information, pathophysiology, treatment
principles, pharmacologic and nonpharmacologic management, complications, and
appropriate clinical decision-making. Multiple-choice questions emphasize both foundational
knowledge and application to realistic patient situations. Effective preparation requires
understanding why an answer is correct rather than relying solely on memorization. The
material is intended to support examination preparation while strengthening the clinical
reasoning required for safe, evidence-informed acute-care practice.
SECTION ONE: QUESTIONS 1–100
Question 1.
A 68-year-old patient develops oliguria after major surgery. His blood pressure is 88/54
mmHg, mucous membranes are dry, and his BUN is 42 mg/dL with a creatinine of 1.4 mg/dL.
Which type of acute kidney injury is most likely?
A. Postrenal acute kidney injury
B. Prerenal acute kidney injury
C. Intrinsic renal injury from glomerulonephritis
D. Acute interstitial nephritis
,Correct Answer: B. Prerenal acute kidney injury
Explanation: Prerenal AKI results from inadequate renal perfusion. Hypotension, volume
depletion, and a disproportionately elevated BUN relative to creatinine support this
diagnosis. Prompt restoration of renal perfusion is essential.
Question 2.
A patient with chronic obstructive pulmonary disease presents with increasing dyspnea.
Which arterial blood gas pattern is most consistent with chronic respiratory acidosis with
renal compensation?
A. pH 7.50, PaCO₂ 30 mmHg, HCO₃⁻ 23 mEq/L
B. pH 7.25, PaCO₂ 60 mmHg, HCO₃⁻ 25 mEq/L
C. pH 7.36, PaCO₂ 55 mmHg, HCO₃⁻ 30 mEq/L
D. pH 7.48, PaCO₂ 48 mmHg, HCO₃⁻ 34 mEq/L
Correct Answer: C. pH 7.36, PaCO₂ 55 mmHg, HCO₃⁻ 30 mEq/L
Explanation: Chronic CO₂ retention causes respiratory acidosis. The kidneys compensate by
retaining bicarbonate, bringing the pH toward the normal range. The elevated PaCO₂ and
bicarbonate with near-normal pH are characteristic.
Question 3.
A patient presents with crushing substernal chest pain radiating to the left arm and
diaphoresis. The ECG demonstrates ST-segment elevation in leads II, III, and aVF. Which
coronary artery is most commonly associated with this pattern?
A. Right coronary artery
B. Left main coronary artery
C. Left anterior descending artery
D. Circumflex artery exclusively
Correct Answer: A. Right coronary artery
Explanation: Inferior STEMI involving leads II, III, and aVF most commonly results from right
coronary artery occlusion, although the circumflex artery can also cause an inferior
infarction.
Question 4.
Which finding is most characteristic of left-sided heart failure?
A. Ascites and hepatomegaly
B. Peripheral edema and jugular venous distention
C. Pulmonary crackles and orthopnea
D. Dependent sacral edema alone
,Correct Answer: C. Pulmonary crackles and orthopnea
Explanation: Left ventricular failure causes pulmonary venous congestion, producing
dyspnea, orthopnea, paroxysmal nocturnal dyspnea, and pulmonary crackles. Right-sided
failure more commonly produces systemic venous congestion.
Question 5.
A patient with atrial fibrillation is being evaluated for stroke prevention. Which mechanism
explains why atrial fibrillation increases thromboembolic risk?
A. Increased ventricular contractility
B. Blood stasis within the atria
C. Increased coronary artery perfusion
D. Decreased systemic vascular resistance
Correct Answer: B. Blood stasis within the atria
Explanation: Ineffective atrial contraction causes blood stasis, particularly in the left atrial
appendage. Stasis promotes thrombus formation, which can embolize and cause ischemic
stroke.
Question 6.
A patient with acute decompensated heart failure has severe pulmonary edema and
hypoxemia. Which intervention should receive the highest priority?
A. Encourage oral fluid intake
B. Place the patient supine
C. Support oxygenation and ventilation
D. Administer a high-sodium meal
Correct Answer: C. Support oxygenation and ventilation
Explanation: Severe pulmonary edema threatens gas exchange. Immediate attention to
airway, breathing, and oxygenation is prioritized while definitive treatment, such as diuresis
and afterload reduction when appropriate, is initiated.
Question 7.
Which finding is most suggestive of pulmonary embolism?
A. Gradual onset of bilateral ankle edema
B. Sudden dyspnea with pleuritic chest pain
C. Chronic productive cough
D. Slow respiratory rate with hypercapnia
Correct Answer: B. Sudden dyspnea with pleuritic chest pain
, Explanation: Pulmonary embolism often presents with sudden dyspnea, pleuritic chest pain,
tachycardia, and hypoxemia. Presentation can vary, but abrupt respiratory symptoms should
raise concern in an appropriate risk setting.
Question 8.
A patient with suspected pulmonary embolism becomes hypotensive and develops severe
hypoxemia. Which complication is most concerning?
A. Massive pulmonary embolism causing obstructive shock
B. Mild ventilation-perfusion mismatch
C. Chronic bronchitis
D. Stable pulmonary hypertension
Correct Answer: A. Massive pulmonary embolism causing obstructive shock
Explanation: A large embolus can acutely obstruct pulmonary blood flow, increase right
ventricular afterload, decrease left ventricular preload, and cause hypotension and
obstructive shock.
Question 9.
Which diagnostic test is commonly used to evaluate pulmonary vasculature for suspected
pulmonary embolism in a hemodynamically stable patient?
A. CT pulmonary angiography
B. Plain abdominal radiography
C. Noncontrast head CT
D. Echocardiography alone
Correct Answer: A. CT pulmonary angiography
Explanation: CT pulmonary angiography is a commonly used definitive imaging study for PE
in appropriate patients. Clinical probability and renal function must be considered when
selecting diagnostic testing.
Question 10.
A patient with COPD has increasing somnolence, respiratory distress, and an elevated PaCO₂.
Which condition should be suspected?
A. Respiratory alkalosis
B. Hypercapnic respiratory failure
C. Metabolic alkalosis
D. Isolated hypovolemia
Correct Answer: B. Hypercapnic respiratory failure
