NR 571 Complex Diagnosis & Management in Acute
Care Practicum | NR571 Chamberlain University
AGACNP Study Guide, Acute Care Nurse
Practitioner Exam Prep, Complex Patient
Management, Advanced Assessment, Differential
Diagnosis, Clinical Reasoning, Diagnostic Testing,
Practice Questions & Detailed Rationales
Question 1: A 72-year-old male with a history of heart failure with reduced
ejection fraction (HFrEF) presents with acute dyspnea, jugular venous
distention, and bilateral crackles. He is on maximal guideline-directed medical
therapy. Which of the following inotropic agents is MOST appropriate for acute
hemodynamic support in this patient?
A. Milrinone
B. Dobutamine
C. Dopamine
D. Digoxin
CORRECT ANSWER: B. Dobutamine
Rationale: Dobutamine is a beta-1 adrenergic agonist that increases cardiac
contractility and stroke volume with relatively mild chronotropic effects, making it a
first-line inotrope for acute decompensated HFrEF with low cardiac output. Milrinone
(A) is a phosphodiesterase-3 inhibitor, which is also a suitable inotrope but carries a
higher risk of hypotension and arrhythmias; it is often reserved for patients on beta-
blockers. Dopamine (C) is a precursor to norepinephrine and is more vasopressive,
which can increase afterload and worsen heart failure. Digoxin (D) is a chronic inotropic
agent with a narrow therapeutic index and is not used for acute hemodynamic
stabilization.
Question 2: A 58-year-old female with a history of cirrhosis presents with new-
onset confusion, asterixis, and a serum ammonia level of 180 mcg/dL. She is
afebrile. Which of the following is the INITIAL priority in her management?
A. Administer lactulose enemas
B. Start rifaximin 550 mg BID
C. Evaluate for and treat precipitating factors
D. Initiate a low-protein diet
CORRECT ANSWER: C. Evaluate for and treat precipitating factors
Rationale: The initial management of hepatic encephalopathy involves identifying and
treating precipitating factors such as gastrointestinal bleeding, infection, electrolyte
abnormalities, or constipation. While lactulose (A) and rifaximin (B) are treatments for
overt hepatic encephalopathy, the priority is to address the underlying cause. A low-
protein diet (D) is no longer recommended and can worsen malnutrition.
,Question 3: A 65-year-old male with CKD stage 4 presents with severe
hyperkalemia (K+ 6.8 mEq/L) and widened QRS complexes on ECG. Which of
the following is the FASTEST-ACTING agent to shift potassium intracellularly?
A. Calcium gluconate
B. Regular insulin with dextrose
C. Sodium polystyrene sulfonate
D. Albuterol nebulizer
CORRECT ANSWER: B. Regular insulin with dextrose
Rationale: Insulin, administered with dextrose to prevent hypoglycemia, shifts
potassium into cells via Na-K ATPase, with onset of action within 10-30 minutes, making
it one of the fastest agents. Calcium gluconate (A) stabilizes the cardiac membrane but
does not lower potassium. Sodium polystyrene sulfonate (C) takes hours to days to
work. Albuterol (D) can also shift potassium but is less reliable and slower than insulin in
acute emergencies.
Question 4: A 45-year-old female with systemic lupus erythematosus presents
with acute pleuritic chest pain, a pericardial friction rub, and diffuse ST-
segment elevation on ECG. What is the FIRST-LINE treatment for this
condition?
A. Colchicine
B. High-dose corticosteroids
C. Ibuprofen
D. Hydroxychloroquine
CORRECT ANSWER: C. Ibuprofen
Rationale: NSAIDs such as ibuprofen are first-line treatment for acute pericarditis in
patients without significant risk factors, including those with autoimmune conditions.
Colchicine (A) is often added as an adjunct for recurrent pericarditis but is not first-line
alone. High-dose corticosteroids (B) are generally avoided as first-line therapy due to
increased risk of recurrence. Hydroxychloroquine (D) is a maintenance drug for SLE, not
an acute treatment for pericarditis.
Question 5: A 74-year-old male presents with acute respiratory distress,
hypotension, and a new right bundle branch block. A CT pulmonary
angiogram confirms a massive pulmonary embolism. Which of the following is
the MOST appropriate immediate intervention?
A. Systemic thrombolysis
B. Therapeutic anticoagulation with heparin
,C. Surgical embolectomy
D. Catheter-directed thrombolysis
CORRECT ANSWER: A. Systemic thrombolysis
Rationale: The patient has a massive PE, defined by obstructive shock and
hypotension. Systemic thrombolysis is the first-line treatment. Therapeutic
anticoagulation (B) is standard for submassive or low-risk PE but does not rapidly
reduce clot burden in hemodynamic instability. Surgical embolectomy (C) and catheter-
directed thrombolysis (D) are second-line alternatives reserved for patients with
contraindications to thrombolysis or when thrombolysis has failed.
Question 6: A 68-year-old female with a history of COPD presents with
worsening dyspnea, increased sputum purulence, and volume. She is afebrile.
Which of the following findings on chest auscultation is MOST characteristic of
an acute exacerbation of COPD?
A. Fine inspiratory crackles
B. Wheezing and diminished breath sounds
C. Pleural friction rub
D. Bronchial breath sounds
CORRECT ANSWER: B. Wheezing and diminished breath sounds
Rationale: Acute exacerbations of COPD are commonly characterized by wheezing,
prolonged expiration, and diminished breath sounds due to airway narrowing and
hyperinflation. Fine crackles (A) are more typical of pulmonary edema or interstitial
lung disease. A pleural rub (C) suggests pleurisy. Bronchial breath sounds (D) indicate
lung consolidation, as seen in pneumonia.
Question 7: A 55-year-old male with a history of hypertension and type 2
diabetes presents with sudden-onset, severe, "tearing" chest pain radiating to
the back, along with a difference in blood pressure of 30 mmHg between arms.
What is the MOST appropriate initial imaging modality for diagnosis?
A. Chest X-ray
B. Transesophageal echocardiography (TEE)
C. CT aortography
D. Magnetic resonance angiography (MRA)
CORRECT ANSWER: C. CT aortography
Rationale: CT aortography is the modality of choice for diagnosing acute aortic
dissection due to its high sensitivity and specificity, rapid availability, and ability to
define the extent of dissection. TEE (B) is useful but is more operator-dependent and
, often used intraoperatively. Chest X-ray (A) may show a widened mediastinum but is not
diagnostic. MRA (D) takes too long and is not practical in an unstable patient.
Question 8: A 47-year-old female with a history of Crohn's disease presents
with severe, cramping abdominal pain, abdominal distension, nausea, and
vomiting. She has not passed flatus for 12 hours. Which of the following is the
MOST important initial management step?
A. Abdominal CT with contrast
B. Nasogastric tube decompression
C. Immediate surgical consultation
D. Administration of oral metronidazole
CORRECT ANSWER: B. Nasogastric tube decompression
Rationale: In the acute management of small bowel obstruction, the immediate priority
is nasogastric tube decompression to prevent aspiration and relieve pressure. While an
abdominal CT (A) is the diagnostic study of choice, it should not delay decompression.
Surgical consultation (C) is necessary but not the initial step. Antibiotics (D) are not
indicated unless there is perforation or sepsis.
Question 9: A 32-year-old male presents with a severe, unilateral headache
described as "the worst of my life," associated with photophobia and neck
stiffness. A lumbar puncture reveals grossly bloody cerebrospinal fluid that
does not clear with sequential tubes. Which of the following is the MOST
appropriate diagnostic confirmation?
A. CT angiography of the head
B. MRI of the brain with contrast
C. Xanthochromia analysis of CSF
D. Serum C-reactive protein
CORRECT ANSWER: C. Xanthochromia analysis of CSF
Rationale: The presence of grossly bloody CSF that does not clear suggests
subarachnoid hemorrhage. Xanthochromia (yellowish discoloration from bilirubin
breakdown) on centrifuged CSF confirms the presence of old blood and is
pathognomonic for SAH if a CT scan is negative. CT angiography (A) is used for
identifying aneurysms after the diagnosis is made. MRI (B) is less sensitive acutely.
Question 10: A 78-year-old male with dementia presents with fever,
tachycardia, and hypotension. He has a chronic indwelling Foley catheter.
Urinalysis shows positive leukocyte esterase and nitrites. Which of the
following is the MOST appropriate initial antibiotic choice?
Care Practicum | NR571 Chamberlain University
AGACNP Study Guide, Acute Care Nurse
Practitioner Exam Prep, Complex Patient
Management, Advanced Assessment, Differential
Diagnosis, Clinical Reasoning, Diagnostic Testing,
Practice Questions & Detailed Rationales
Question 1: A 72-year-old male with a history of heart failure with reduced
ejection fraction (HFrEF) presents with acute dyspnea, jugular venous
distention, and bilateral crackles. He is on maximal guideline-directed medical
therapy. Which of the following inotropic agents is MOST appropriate for acute
hemodynamic support in this patient?
A. Milrinone
B. Dobutamine
C. Dopamine
D. Digoxin
CORRECT ANSWER: B. Dobutamine
Rationale: Dobutamine is a beta-1 adrenergic agonist that increases cardiac
contractility and stroke volume with relatively mild chronotropic effects, making it a
first-line inotrope for acute decompensated HFrEF with low cardiac output. Milrinone
(A) is a phosphodiesterase-3 inhibitor, which is also a suitable inotrope but carries a
higher risk of hypotension and arrhythmias; it is often reserved for patients on beta-
blockers. Dopamine (C) is a precursor to norepinephrine and is more vasopressive,
which can increase afterload and worsen heart failure. Digoxin (D) is a chronic inotropic
agent with a narrow therapeutic index and is not used for acute hemodynamic
stabilization.
Question 2: A 58-year-old female with a history of cirrhosis presents with new-
onset confusion, asterixis, and a serum ammonia level of 180 mcg/dL. She is
afebrile. Which of the following is the INITIAL priority in her management?
A. Administer lactulose enemas
B. Start rifaximin 550 mg BID
C. Evaluate for and treat precipitating factors
D. Initiate a low-protein diet
CORRECT ANSWER: C. Evaluate for and treat precipitating factors
Rationale: The initial management of hepatic encephalopathy involves identifying and
treating precipitating factors such as gastrointestinal bleeding, infection, electrolyte
abnormalities, or constipation. While lactulose (A) and rifaximin (B) are treatments for
overt hepatic encephalopathy, the priority is to address the underlying cause. A low-
protein diet (D) is no longer recommended and can worsen malnutrition.
,Question 3: A 65-year-old male with CKD stage 4 presents with severe
hyperkalemia (K+ 6.8 mEq/L) and widened QRS complexes on ECG. Which of
the following is the FASTEST-ACTING agent to shift potassium intracellularly?
A. Calcium gluconate
B. Regular insulin with dextrose
C. Sodium polystyrene sulfonate
D. Albuterol nebulizer
CORRECT ANSWER: B. Regular insulin with dextrose
Rationale: Insulin, administered with dextrose to prevent hypoglycemia, shifts
potassium into cells via Na-K ATPase, with onset of action within 10-30 minutes, making
it one of the fastest agents. Calcium gluconate (A) stabilizes the cardiac membrane but
does not lower potassium. Sodium polystyrene sulfonate (C) takes hours to days to
work. Albuterol (D) can also shift potassium but is less reliable and slower than insulin in
acute emergencies.
Question 4: A 45-year-old female with systemic lupus erythematosus presents
with acute pleuritic chest pain, a pericardial friction rub, and diffuse ST-
segment elevation on ECG. What is the FIRST-LINE treatment for this
condition?
A. Colchicine
B. High-dose corticosteroids
C. Ibuprofen
D. Hydroxychloroquine
CORRECT ANSWER: C. Ibuprofen
Rationale: NSAIDs such as ibuprofen are first-line treatment for acute pericarditis in
patients without significant risk factors, including those with autoimmune conditions.
Colchicine (A) is often added as an adjunct for recurrent pericarditis but is not first-line
alone. High-dose corticosteroids (B) are generally avoided as first-line therapy due to
increased risk of recurrence. Hydroxychloroquine (D) is a maintenance drug for SLE, not
an acute treatment for pericarditis.
Question 5: A 74-year-old male presents with acute respiratory distress,
hypotension, and a new right bundle branch block. A CT pulmonary
angiogram confirms a massive pulmonary embolism. Which of the following is
the MOST appropriate immediate intervention?
A. Systemic thrombolysis
B. Therapeutic anticoagulation with heparin
,C. Surgical embolectomy
D. Catheter-directed thrombolysis
CORRECT ANSWER: A. Systemic thrombolysis
Rationale: The patient has a massive PE, defined by obstructive shock and
hypotension. Systemic thrombolysis is the first-line treatment. Therapeutic
anticoagulation (B) is standard for submassive or low-risk PE but does not rapidly
reduce clot burden in hemodynamic instability. Surgical embolectomy (C) and catheter-
directed thrombolysis (D) are second-line alternatives reserved for patients with
contraindications to thrombolysis or when thrombolysis has failed.
Question 6: A 68-year-old female with a history of COPD presents with
worsening dyspnea, increased sputum purulence, and volume. She is afebrile.
Which of the following findings on chest auscultation is MOST characteristic of
an acute exacerbation of COPD?
A. Fine inspiratory crackles
B. Wheezing and diminished breath sounds
C. Pleural friction rub
D. Bronchial breath sounds
CORRECT ANSWER: B. Wheezing and diminished breath sounds
Rationale: Acute exacerbations of COPD are commonly characterized by wheezing,
prolonged expiration, and diminished breath sounds due to airway narrowing and
hyperinflation. Fine crackles (A) are more typical of pulmonary edema or interstitial
lung disease. A pleural rub (C) suggests pleurisy. Bronchial breath sounds (D) indicate
lung consolidation, as seen in pneumonia.
Question 7: A 55-year-old male with a history of hypertension and type 2
diabetes presents with sudden-onset, severe, "tearing" chest pain radiating to
the back, along with a difference in blood pressure of 30 mmHg between arms.
What is the MOST appropriate initial imaging modality for diagnosis?
A. Chest X-ray
B. Transesophageal echocardiography (TEE)
C. CT aortography
D. Magnetic resonance angiography (MRA)
CORRECT ANSWER: C. CT aortography
Rationale: CT aortography is the modality of choice for diagnosing acute aortic
dissection due to its high sensitivity and specificity, rapid availability, and ability to
define the extent of dissection. TEE (B) is useful but is more operator-dependent and
, often used intraoperatively. Chest X-ray (A) may show a widened mediastinum but is not
diagnostic. MRA (D) takes too long and is not practical in an unstable patient.
Question 8: A 47-year-old female with a history of Crohn's disease presents
with severe, cramping abdominal pain, abdominal distension, nausea, and
vomiting. She has not passed flatus for 12 hours. Which of the following is the
MOST important initial management step?
A. Abdominal CT with contrast
B. Nasogastric tube decompression
C. Immediate surgical consultation
D. Administration of oral metronidazole
CORRECT ANSWER: B. Nasogastric tube decompression
Rationale: In the acute management of small bowel obstruction, the immediate priority
is nasogastric tube decompression to prevent aspiration and relieve pressure. While an
abdominal CT (A) is the diagnostic study of choice, it should not delay decompression.
Surgical consultation (C) is necessary but not the initial step. Antibiotics (D) are not
indicated unless there is perforation or sepsis.
Question 9: A 32-year-old male presents with a severe, unilateral headache
described as "the worst of my life," associated with photophobia and neck
stiffness. A lumbar puncture reveals grossly bloody cerebrospinal fluid that
does not clear with sequential tubes. Which of the following is the MOST
appropriate diagnostic confirmation?
A. CT angiography of the head
B. MRI of the brain with contrast
C. Xanthochromia analysis of CSF
D. Serum C-reactive protein
CORRECT ANSWER: C. Xanthochromia analysis of CSF
Rationale: The presence of grossly bloody CSF that does not clear suggests
subarachnoid hemorrhage. Xanthochromia (yellowish discoloration from bilirubin
breakdown) on centrifuged CSF confirms the presence of old blood and is
pathognomonic for SAH if a CT scan is negative. CT angiography (A) is used for
identifying aneurysms after the diagnosis is made. MRI (B) is less sensitive acutely.
Question 10: A 78-year-old male with dementia presents with fever,
tachycardia, and hypotension. He has a chronic indwelling Foley catheter.
Urinalysis shows positive leukocyte esterase and nitrites. Which of the
following is the MOST appropriate initial antibiotic choice?
