NBRC TMC / RRT / CRT Ultimate Exam Prep Bank
100+ Questions & Detailed Clinical Rationales 2026-
2027 [Version 3 Edition]
1. A 58-year-old male with a severe history of COPD is admitted to the emergency department in
acute respiratory distress. The arterial blood gas (ABG) on room air reveals: pH 7.24, PaCO₂ 68
mmHg, PaO₂ 48 mmHg, HCO₃⁻ 28 mEq/L. Which of the following best describes this acid-base
status?
A. Uncompensated respiratory alkalosis
B. Partially compensated metabolic acidosis
C. Acute (uncompensated) respiratory acidosis with severe hypoxemia
D. Fully compensated respiratory acidosis
Correct Answer: C
Rationale: The pH is significantly acidotic (<7.35) and the PaCO₂ is highly elevated
(>45 mmHg), establishing a primary respiratory acidosis. Bicarbonate is only minimally
elevated, confirming an acute phase lacking full renal compensation. A PaO₂ below 50
mmHg represents severe tissue hypoxemia.
2. While reviewing a critical care patient's laboratory values, you note a sudden increase in the
white blood cell (WBC) count from 8,500/mm³ to 17,200/mm³. This shift most likely indicates:
,NBRC TMC / RRT / CRT Ultimate Exam Prep Bank
100+ Questions & Detailed Clinical Rationales 2026-
2027 [Version 3 Edition]
A. A severe viral infection
B. An acute bacterial infection
C. Advanced chronic anemia
D. An acute type-1 allergic reaction
Correct Answer: B
Rationale: A significant leukocytosis (>11,000/mm³) dominated by an increase in
absolute neutrophil count typically indicates an active bacterial infection.
3. A patient with chest trauma has a chest tube connected to a three-chamber drainage system.
Continuous, violent bubbling is observed in the water-seal chamber during both inspiration and
expiration. This indicates:
A. A normal functional therapeutic state
B. An active system suction control failure
C. A persistent air leak in the patient or circuit loop
D. The pleural space is fully expanded
Correct Answer: C
Rationale: Intermittent bubbling during exhalation or coughing is normal in a
pneumothorax, but continuous bubbling across the respiratory cycle confirms a
significant air leak somewhere in the patient's pleural space or within the drainage
connections.
4. A patient receiving volume-controlled mechanical ventilation demonstrates an increase in
Peak Inspiratory Pressure (PIP) from 24 cmH₂O to 38 cmH₂O, while the Plateau Pressure
remains stable at 16 cmH₂O. This indicates a change in:
A. Static compliance
B. Airway resistance
C. Alveolar dead space
D. Lung tissue elasticity
Correct Answer: B
,NBRC TMC / RRT / CRT Ultimate Exam Prep Bank
100+ Questions & Detailed Clinical Rationales 2026-
2027 [Version 3 Edition]
Rationale: Transairway pressure (PIP - Plateau Pressure) represents the pressure needed
to overcome resistance. Since the PIP rose but the Plateau remained unchanged, airway
resistance has increased (e.g., due to bronchospasm, secretions, or an kinked tube).
5. A mechanically ventilated patient's Plateau Pressure increases from 18 cmH₂O to 32 cmH₂O,
and the PIP increases simultaneously. This pattern reflects a decrease in:
A. Airway resistance
B. Dynamic compliance
C. Static lung compliance
D. Auto-PEEP
Correct Answer: C
Rationale: Plateau pressure directly reflects alveolar pressure at end-inspiration during a
zero-flow pause. An increase in plateau pressure confirms a drop in static lung
compliance, common in ARDS, pulmonary edema, or consolidated pneumonia.
6. Which of the following values represents a normal Cardiac Index (CI) for a healthy resting
adult?
A. 4.0 - 8.0 L/min
B. 2.5 - 4.0 L/min/m²
C. 1.0 - 2.0 L/min/m²
D. 50 - 100 mL/beat
Correct Answer: B
Rationale: Cardiac Index (CI) normalizes cardiac output to body surface area. The
normal range is 2.5 to 4.0 L/min/m². Absolute Cardiac Output (CO) ranges from 4.0 to
8.0 L/min.
7. A patient in the ICU exhibits a Pulmonary Capillary Wedge Pressure (PCWP) of 24 mmHg.
Which of the following conditions is most consistent with this finding?
A. Acute Respiratory Distress Syndrome (ARDS)
, NBRC TMC / RRT / CRT Ultimate Exam Prep Bank
100+ Questions & Detailed Clinical Rationales 2026-
2027 [Version 3 Edition]
B. Left-sided heart failure / Cardiogenic pulmonary edema
C. Severe hypovolemic shock
D. Massive pulmonary embolism
Correct Answer: B
Rationale: PCWP estimates left atrial pressure. An elevated PCWP (>18 mmHg)
signifies left ventricular failure or fluid overload causing cardiogenic edema. Non-
cardiogenic conditions like ARDS present with a normal PCWP (≤ 18 mmHg).
8. A multi-lumen pulmonary artery catheter (Swan-Ganz) can directly measure which of the
following hemodynamic parameters?
A. Left ventricular stroke work index
B. Mean pulmonary artery pressure (PAP)
C. Total arterial oxygen content
D. Systemic vascular resistance (SVR)
Correct Answer: B
Rationale: A pulmonary artery catheter directly measures right atrial pressure (CVP),
pulmonary artery pressure (PAP), and pulmonary capillary wedge pressure (PCWP).
SVR and stroke work are derived parameters calculated from these values.
9. A 4-year-old child presents to the emergency room with sudden onset of high fever,
inspiratory stridor, and severe drooling. A lateral neck radiograph reveals a classic "thumbprint"
sign. What is the most appropriate immediate action?
A. Establish an airway via controlled endotracheal intubation in an operating room
B. Administer 0.5 mL of racemic epinephrine via small volume nebulizer
C. Obtain an urgent arterial blood gas to assess oxygenation index
D. Initiate high-flow cool mist aerosol therapy via face tent
Correct Answer: A
Rationale: The "thumbprint" sign on a lateral neck X-ray confirms acute epiglottitis.
Because of the risk of sudden, total airway occlusion, the priority is to secure the airway
in a controlled environment with anesthesia staff present. Avoid unnecessary agitation,
such as drawing blood or manipulating the airway outside an operating room.
100+ Questions & Detailed Clinical Rationales 2026-
2027 [Version 3 Edition]
1. A 58-year-old male with a severe history of COPD is admitted to the emergency department in
acute respiratory distress. The arterial blood gas (ABG) on room air reveals: pH 7.24, PaCO₂ 68
mmHg, PaO₂ 48 mmHg, HCO₃⁻ 28 mEq/L. Which of the following best describes this acid-base
status?
A. Uncompensated respiratory alkalosis
B. Partially compensated metabolic acidosis
C. Acute (uncompensated) respiratory acidosis with severe hypoxemia
D. Fully compensated respiratory acidosis
Correct Answer: C
Rationale: The pH is significantly acidotic (<7.35) and the PaCO₂ is highly elevated
(>45 mmHg), establishing a primary respiratory acidosis. Bicarbonate is only minimally
elevated, confirming an acute phase lacking full renal compensation. A PaO₂ below 50
mmHg represents severe tissue hypoxemia.
2. While reviewing a critical care patient's laboratory values, you note a sudden increase in the
white blood cell (WBC) count from 8,500/mm³ to 17,200/mm³. This shift most likely indicates:
,NBRC TMC / RRT / CRT Ultimate Exam Prep Bank
100+ Questions & Detailed Clinical Rationales 2026-
2027 [Version 3 Edition]
A. A severe viral infection
B. An acute bacterial infection
C. Advanced chronic anemia
D. An acute type-1 allergic reaction
Correct Answer: B
Rationale: A significant leukocytosis (>11,000/mm³) dominated by an increase in
absolute neutrophil count typically indicates an active bacterial infection.
3. A patient with chest trauma has a chest tube connected to a three-chamber drainage system.
Continuous, violent bubbling is observed in the water-seal chamber during both inspiration and
expiration. This indicates:
A. A normal functional therapeutic state
B. An active system suction control failure
C. A persistent air leak in the patient or circuit loop
D. The pleural space is fully expanded
Correct Answer: C
Rationale: Intermittent bubbling during exhalation or coughing is normal in a
pneumothorax, but continuous bubbling across the respiratory cycle confirms a
significant air leak somewhere in the patient's pleural space or within the drainage
connections.
4. A patient receiving volume-controlled mechanical ventilation demonstrates an increase in
Peak Inspiratory Pressure (PIP) from 24 cmH₂O to 38 cmH₂O, while the Plateau Pressure
remains stable at 16 cmH₂O. This indicates a change in:
A. Static compliance
B. Airway resistance
C. Alveolar dead space
D. Lung tissue elasticity
Correct Answer: B
,NBRC TMC / RRT / CRT Ultimate Exam Prep Bank
100+ Questions & Detailed Clinical Rationales 2026-
2027 [Version 3 Edition]
Rationale: Transairway pressure (PIP - Plateau Pressure) represents the pressure needed
to overcome resistance. Since the PIP rose but the Plateau remained unchanged, airway
resistance has increased (e.g., due to bronchospasm, secretions, or an kinked tube).
5. A mechanically ventilated patient's Plateau Pressure increases from 18 cmH₂O to 32 cmH₂O,
and the PIP increases simultaneously. This pattern reflects a decrease in:
A. Airway resistance
B. Dynamic compliance
C. Static lung compliance
D. Auto-PEEP
Correct Answer: C
Rationale: Plateau pressure directly reflects alveolar pressure at end-inspiration during a
zero-flow pause. An increase in plateau pressure confirms a drop in static lung
compliance, common in ARDS, pulmonary edema, or consolidated pneumonia.
6. Which of the following values represents a normal Cardiac Index (CI) for a healthy resting
adult?
A. 4.0 - 8.0 L/min
B. 2.5 - 4.0 L/min/m²
C. 1.0 - 2.0 L/min/m²
D. 50 - 100 mL/beat
Correct Answer: B
Rationale: Cardiac Index (CI) normalizes cardiac output to body surface area. The
normal range is 2.5 to 4.0 L/min/m². Absolute Cardiac Output (CO) ranges from 4.0 to
8.0 L/min.
7. A patient in the ICU exhibits a Pulmonary Capillary Wedge Pressure (PCWP) of 24 mmHg.
Which of the following conditions is most consistent with this finding?
A. Acute Respiratory Distress Syndrome (ARDS)
, NBRC TMC / RRT / CRT Ultimate Exam Prep Bank
100+ Questions & Detailed Clinical Rationales 2026-
2027 [Version 3 Edition]
B. Left-sided heart failure / Cardiogenic pulmonary edema
C. Severe hypovolemic shock
D. Massive pulmonary embolism
Correct Answer: B
Rationale: PCWP estimates left atrial pressure. An elevated PCWP (>18 mmHg)
signifies left ventricular failure or fluid overload causing cardiogenic edema. Non-
cardiogenic conditions like ARDS present with a normal PCWP (≤ 18 mmHg).
8. A multi-lumen pulmonary artery catheter (Swan-Ganz) can directly measure which of the
following hemodynamic parameters?
A. Left ventricular stroke work index
B. Mean pulmonary artery pressure (PAP)
C. Total arterial oxygen content
D. Systemic vascular resistance (SVR)
Correct Answer: B
Rationale: A pulmonary artery catheter directly measures right atrial pressure (CVP),
pulmonary artery pressure (PAP), and pulmonary capillary wedge pressure (PCWP).
SVR and stroke work are derived parameters calculated from these values.
9. A 4-year-old child presents to the emergency room with sudden onset of high fever,
inspiratory stridor, and severe drooling. A lateral neck radiograph reveals a classic "thumbprint"
sign. What is the most appropriate immediate action?
A. Establish an airway via controlled endotracheal intubation in an operating room
B. Administer 0.5 mL of racemic epinephrine via small volume nebulizer
C. Obtain an urgent arterial blood gas to assess oxygenation index
D. Initiate high-flow cool mist aerosol therapy via face tent
Correct Answer: A
Rationale: The "thumbprint" sign on a lateral neck X-ray confirms acute epiglottitis.
Because of the risk of sudden, total airway occlusion, the priority is to secure the airway
in a controlled environment with anesthesia staff present. Avoid unnecessary agitation,
such as drawing blood or manipulating the airway outside an operating room.
