COMSAE Phase 2 BSA Form 118 – Comprehensive
Exam with Questions, Answers and Rationales
2026/2027 Update
Question 1
A 67-year-old man with a 50-pack-year smoking history and chronic obstructive pulmonary
disease (COPD) presents with increasing dyspnea and purulent sputum production. An arterial
blood gas (ABG) analysis on room air reveals the following:
pH: 7.31
PaCO2: 58 mmHg
HCO3-: 30 mEq/L
PaO2: 54 mmHg
Which of the following interventions has been definitively shown to reduce mortality in this
patient profile?
A. Inhaled corticosteroid monotherapy
B. Long-acting beta-2 agonist monotherapy
C. Long-term continuous oxygen therapy
D. Scheduled short-acting muscarinic antagonist use
Correct Answer: C. Long-term continuous oxygen therapy
Rationale:
The patient exhibits chronic respiratory acidosis with metabolic compensation secondary to
advanced COPD. His resting PaO2 of 54 mmHg meets the criteria for long-term oxygen therapy
(LTOT), which is proven to increase overall survival and reduce mortality in patients with
chronic hypoxemia (defined as PaO2 at or below 55 mmHg or the presence of cor pulmonale).
Inhaled corticosteroids and long-acting bronchodilators improve quality of life and reduce
exacerbation frequency, but they do not alter survival outcomes to the extent that continuous
oxygen does in severe hypoxemia.
Question 2
,A 49-year-old woman is brought to the emergency department with an acute-onset severe
headache, high fever, photophobia, and neck stiffness. Her temperature is 39.5°C. A lumbar
puncture is performed, and cerebrospinal fluid (CSF) analysis reveals 2000 white blood cells/uL
with 90% neutrophils, a glucose level of 20 mg/dL (concurrent serum glucose is 100 mg/dL),
and a total protein of 220 mg/dL. Gram stain demonstrates gram-positive cocci in pairs.
Which of the following represents the most appropriate empiric antimicrobial therapy?
A. Ceftriaxone combined with vancomycin
B. Ampicillin combined with gentamicin
C. Meropenem monotherapy
D. Vancomycin monotherapy
Correct Answer: A. Ceftriaxone combined with vancomycin
Rationale:
The clinical presentation, CSF findings (neutrophilic pleocytosis, low CSF-to-serum glucose
ratio, elevated protein), and gram-positive diplococci point directly toward acute community-
acquired bacterial meningitis caused by Streptococcus pneumoniae. Empiric treatment for
suspected bacterial meningitis in adults requires a third-generation cephalosporin (such as
ceftriaxone or cefotaxime) to cover common pathogens, plus vancomycin to provide adequate
coverage against penicillin-resistant strains of Streptococcus pneumoniae.
Question 3
A 59-year-old man with a known history of hypertension and type 2 diabetes mellitus presents
with acute substernal chest pressure radiating to his jaw. A 12-lead electrocardiogram (ECG)
shows significant ST-segment elevations in leads V1 through V4.
Which of the following is the most appropriate next step in clinical management?
A. Administration of aspirin and immediate percutaneous coronary intervention (PCI)
B. Administration of aspirin and intravenous tissue plasminogen activator (tPA)
C. Administration of aspirin, clopidogrel, and conservative medical management
D. Administration of aspirin and urgent coronary artery bypass grafting (CABG)
Correct Answer: A. Administration of aspirin and immediate percutaneous coronary
intervention (PCI)
,Rationale:
This patient is presenting with an acute ST-elevation myocardial infarction (STEMI) involving
the anterior wall of the heart. The standard of care for acute STEMI is prompt reperfusion
therapy. Primary percutaneous coronary intervention (PCI) is the preferred reperfusion strategy
and should be performed within 90 minutes of first medical contact if available at the facility, or
within 120 minutes if transfer is required. Fibrinolytic therapy is reserved for situations where
PCI cannot be executed within the designated time frame.
Question 4
A 33-year-old G2P1 woman at 32 weeks of gestation is evaluated in the clinic due to a blood
pressure reading of 170/104 mmHg and 4+ proteinuria on urinalysis. She reports experiencing a
persistent, throbbing frontal headache and localized right upper quadrant/epigastric abdominal
pain.
Which of the following is the most appropriate definitive management strategy?
A. Initiation of labetalol with expectant outpatient monitoring until 34 weeks
B. Administration of magnesium sulfate for seizure prophylaxis and prompt delivery
C. Immediate exploratory laparoscopy for suspected gallbladder pathology
D. Administration of oral methyldopa with strict bed rest
Correct Answer: B. Administration of magnesium sulfate for seizure prophylaxis and prompt
delivery
Rationale:
This patient displays features of preeclampsia with severe features, highlighted by severe
hypertension (blood pressure 160/110 mmHg), persistent central nervous system symptoms
(headache), and hepatic capsule distension symptoms (epigastric pain). At or beyond 34 weeks
gestation—or earlier if maternal or fetal instability is present, such as severe persistent
symptoms—delivery is the definitive treatment. Magnesium sulfate is routinely administered to
prevent maternal eclamptic seizures during stabilization and delivery.
Question 5
A 56-year-old man with heart failure and a reduced ejection fraction (EF of 28%) is evaluated for
worsening shortness of breath, orthopnea, and lower extremity swelling. His current outpatient
regimen includes carvedilol, lisinopril, furosemide, and spironolactone. Laboratory evaluation
reveals a serum potassium level of 6.3 mEq/L and a serum creatinine level of 2.6 mg/dL
(baseline was 1.2 mg/dL).
, Which of the following medications should be temporarily or permanently discontinued first?
A. Carvedilol
B. Lisinopril
C. Furosemide
D. Spironolactone
Correct Answer: D. Spironolactone
Rationale:
The patient has developed severe, potentially life-threatening hyperkalemia (potassium 6.3
mEq/L) alongside acute kidney injury. Mineralocorticoid receptor antagonists (such as
spironolactone), when combined with an ACE inhibitor like lisinopril, significantly increase the
risk of hyperkalemia. Spironolactone must be withheld immediately in the setting of dangerous
hyperkalemia to protect cardiac electrophysiology from fatal arrhythmias.
Question 6
A 27-year-old woman presents to the emergency department with acute-onset shortness of breath
and right-sided calf swelling and tenderness that began twelve days after completing a long-
distance international flight. A bedside compression ultrasonography confirms an acute deep
vein thrombosis in the right lower extremity.
Which of the following pathophysiological mechanisms directly initiated the primary
hypercoagulability state in this scenario?
A. Endothelial injury from hypoxic cabin pressure
B. Stasis of blood flow combined with prolonged immobilization
C. Genetic deficiency of antithrombin III
D. Primary thrombocytosis due to dehydration
Correct Answer: B. Stasis of blood flow combined with prolonged immobilization
Rationale:
Virchow's triad outlines the three broad categories of factors that contribute to thrombosis:
endothelial injury, hypercoagulability, and hemodynamic stasis. Prolonged immobility during
long flights causes marked venous stasis in the lower extremities, which is the primary driver for
Exam with Questions, Answers and Rationales
2026/2027 Update
Question 1
A 67-year-old man with a 50-pack-year smoking history and chronic obstructive pulmonary
disease (COPD) presents with increasing dyspnea and purulent sputum production. An arterial
blood gas (ABG) analysis on room air reveals the following:
pH: 7.31
PaCO2: 58 mmHg
HCO3-: 30 mEq/L
PaO2: 54 mmHg
Which of the following interventions has been definitively shown to reduce mortality in this
patient profile?
A. Inhaled corticosteroid monotherapy
B. Long-acting beta-2 agonist monotherapy
C. Long-term continuous oxygen therapy
D. Scheduled short-acting muscarinic antagonist use
Correct Answer: C. Long-term continuous oxygen therapy
Rationale:
The patient exhibits chronic respiratory acidosis with metabolic compensation secondary to
advanced COPD. His resting PaO2 of 54 mmHg meets the criteria for long-term oxygen therapy
(LTOT), which is proven to increase overall survival and reduce mortality in patients with
chronic hypoxemia (defined as PaO2 at or below 55 mmHg or the presence of cor pulmonale).
Inhaled corticosteroids and long-acting bronchodilators improve quality of life and reduce
exacerbation frequency, but they do not alter survival outcomes to the extent that continuous
oxygen does in severe hypoxemia.
Question 2
,A 49-year-old woman is brought to the emergency department with an acute-onset severe
headache, high fever, photophobia, and neck stiffness. Her temperature is 39.5°C. A lumbar
puncture is performed, and cerebrospinal fluid (CSF) analysis reveals 2000 white blood cells/uL
with 90% neutrophils, a glucose level of 20 mg/dL (concurrent serum glucose is 100 mg/dL),
and a total protein of 220 mg/dL. Gram stain demonstrates gram-positive cocci in pairs.
Which of the following represents the most appropriate empiric antimicrobial therapy?
A. Ceftriaxone combined with vancomycin
B. Ampicillin combined with gentamicin
C. Meropenem monotherapy
D. Vancomycin monotherapy
Correct Answer: A. Ceftriaxone combined with vancomycin
Rationale:
The clinical presentation, CSF findings (neutrophilic pleocytosis, low CSF-to-serum glucose
ratio, elevated protein), and gram-positive diplococci point directly toward acute community-
acquired bacterial meningitis caused by Streptococcus pneumoniae. Empiric treatment for
suspected bacterial meningitis in adults requires a third-generation cephalosporin (such as
ceftriaxone or cefotaxime) to cover common pathogens, plus vancomycin to provide adequate
coverage against penicillin-resistant strains of Streptococcus pneumoniae.
Question 3
A 59-year-old man with a known history of hypertension and type 2 diabetes mellitus presents
with acute substernal chest pressure radiating to his jaw. A 12-lead electrocardiogram (ECG)
shows significant ST-segment elevations in leads V1 through V4.
Which of the following is the most appropriate next step in clinical management?
A. Administration of aspirin and immediate percutaneous coronary intervention (PCI)
B. Administration of aspirin and intravenous tissue plasminogen activator (tPA)
C. Administration of aspirin, clopidogrel, and conservative medical management
D. Administration of aspirin and urgent coronary artery bypass grafting (CABG)
Correct Answer: A. Administration of aspirin and immediate percutaneous coronary
intervention (PCI)
,Rationale:
This patient is presenting with an acute ST-elevation myocardial infarction (STEMI) involving
the anterior wall of the heart. The standard of care for acute STEMI is prompt reperfusion
therapy. Primary percutaneous coronary intervention (PCI) is the preferred reperfusion strategy
and should be performed within 90 minutes of first medical contact if available at the facility, or
within 120 minutes if transfer is required. Fibrinolytic therapy is reserved for situations where
PCI cannot be executed within the designated time frame.
Question 4
A 33-year-old G2P1 woman at 32 weeks of gestation is evaluated in the clinic due to a blood
pressure reading of 170/104 mmHg and 4+ proteinuria on urinalysis. She reports experiencing a
persistent, throbbing frontal headache and localized right upper quadrant/epigastric abdominal
pain.
Which of the following is the most appropriate definitive management strategy?
A. Initiation of labetalol with expectant outpatient monitoring until 34 weeks
B. Administration of magnesium sulfate for seizure prophylaxis and prompt delivery
C. Immediate exploratory laparoscopy for suspected gallbladder pathology
D. Administration of oral methyldopa with strict bed rest
Correct Answer: B. Administration of magnesium sulfate for seizure prophylaxis and prompt
delivery
Rationale:
This patient displays features of preeclampsia with severe features, highlighted by severe
hypertension (blood pressure 160/110 mmHg), persistent central nervous system symptoms
(headache), and hepatic capsule distension symptoms (epigastric pain). At or beyond 34 weeks
gestation—or earlier if maternal or fetal instability is present, such as severe persistent
symptoms—delivery is the definitive treatment. Magnesium sulfate is routinely administered to
prevent maternal eclamptic seizures during stabilization and delivery.
Question 5
A 56-year-old man with heart failure and a reduced ejection fraction (EF of 28%) is evaluated for
worsening shortness of breath, orthopnea, and lower extremity swelling. His current outpatient
regimen includes carvedilol, lisinopril, furosemide, and spironolactone. Laboratory evaluation
reveals a serum potassium level of 6.3 mEq/L and a serum creatinine level of 2.6 mg/dL
(baseline was 1.2 mg/dL).
, Which of the following medications should be temporarily or permanently discontinued first?
A. Carvedilol
B. Lisinopril
C. Furosemide
D. Spironolactone
Correct Answer: D. Spironolactone
Rationale:
The patient has developed severe, potentially life-threatening hyperkalemia (potassium 6.3
mEq/L) alongside acute kidney injury. Mineralocorticoid receptor antagonists (such as
spironolactone), when combined with an ACE inhibitor like lisinopril, significantly increase the
risk of hyperkalemia. Spironolactone must be withheld immediately in the setting of dangerous
hyperkalemia to protect cardiac electrophysiology from fatal arrhythmias.
Question 6
A 27-year-old woman presents to the emergency department with acute-onset shortness of breath
and right-sided calf swelling and tenderness that began twelve days after completing a long-
distance international flight. A bedside compression ultrasonography confirms an acute deep
vein thrombosis in the right lower extremity.
Which of the following pathophysiological mechanisms directly initiated the primary
hypercoagulability state in this scenario?
A. Endothelial injury from hypoxic cabin pressure
B. Stasis of blood flow combined with prolonged immobilization
C. Genetic deficiency of antithrombin III
D. Primary thrombocytosis due to dehydration
Correct Answer: B. Stasis of blood flow combined with prolonged immobilization
Rationale:
Virchow's triad outlines the three broad categories of factors that contribute to thrombosis:
endothelial injury, hypercoagulability, and hemodynamic stasis. Prolonged immobility during
long flights causes marked venous stasis in the lower extremities, which is the primary driver for
