RRT CLINICAL SIMULATIONS (CSE) NBRC EXAM ACTUAL 2026/2027
COMPLETE ACCURATE WITH WELL ELABORATED ANSWERS WITH
DETAILED RATIONALES (100% CORRECT VERIFIED SOLUTIONS)
CURRENTLY UPDATED VERSION 2026 EDITION |GUARANTEED
SUCCESS A+ (BRAND NEW!) |FULL REVISED RRT CLINICAL
SIMULATIONS (CSE) NBRC APPROVED EXAM
Scenario 1: A 58-year-old male with a history of COPD is admitted with
increased shortness of breath, productive cough, and fever. Arterial
blood gas (ABG) on room air shows: pH 7.29, PaCO2 68 mm Hg, PaO2
55 mm Hg, HCO3- 28 mEq/L. The patient is alert but tachypneic. What
is the most appropriate initial intervention?
A) Intubate and initiate mechanical ventilation with a tidal volume of 10
mL/kg
B) Apply noninvasive positive pressure ventilation (NPPV) with an
IPAP of 12 cm H2O and EPAP of 6 cm H2O
C) CORRECT ANSWER: Apply noninvasive positive pressure
ventilation (NPPV) with an IPAP of 12 cm H2O and EPAP of 6 cm
H2O
D) Administer a 100% non-rebreather mask at 15 L/min
Rationale: The patient has acute-on-chronic respiratory acidosis (pH
<7.30) but is alert and has COPD. NPPV is indicated to improve
ventilation, reduce PaCO2, and decrease work of breathing while
avoiding intubation. A non-rebreather would not lower PaCO2, and
intubation is not yet necessary.
,Scenario 2: A 45-year-old female with status asthmaticus is intubated
and on volume-controlled ventilation (VCV): Vt 450 mL, rate 14, FiO2
0.8, PEEP 5 cm H2O. Peak airway pressure is 52 cm H2O, plateau
pressure is 38 cm H2O. Which action would most reduce the risk of
barotrauma?
A) Increase the respiratory rate to 18 breaths/min
B) Change to pressure-controlled ventilation (PCV) with a set pressure
of 30 cm H2O
C) CORRECT ANSWER: Change to pressure-controlled ventilation
(PCV) with a set pressure of 30 cm H2O
D) Add inhaled nitric oxide at 20 ppm
Rationale: High plateau pressure (>30 cm H2O) indicates risk of
alveolar overdistention. PCV limits driving pressure and may lower peak
and plateau pressures by adjusting flow delivery, reducing barotrauma
risk. Rate increase would not lower pressure; nitric oxide is for
refractory hypoxemia.
Scenario 3: A 70-year-old post-cardiac arrest patient has the following
ABG on VCV: pH 7.51, PaCO2 30 mm Hg, PaO2 90 mm Hg, HCO3-
24 mEq/L, FiO2 0.4, rate 15, Vt 600 mL. What ventilator change is
indicated?
A) Increase FiO2 to 0.6
B) Decrease set rate to 12 breaths/min
C) CORRECT ANSWER: Decrease set rate to 12 breaths/min
,D) Add PEEP to 15 cm H2O
Rationale: Patient has respiratory alkalosis (pH >7.45, PaCO2 <35).
Decreasing the rate will increase PaCO2 by reducing minute ventilation,
normalizing pH. FiO2 is adequate (PaO2 90), and PEEP does not
address alkalosis.
Scenario 4: A 62-year-old male with CHF is on NPPV for acute
pulmonary edema. SpO2 drops from 94% to 82% after 30 minutes. Lung
auscultation reveals decreased breath sounds over the right hemithorax.
Which immediate action is most appropriate?
A) Increase IPAP to 18 cm H2O
B) Switch to high-flow nasal cannula at 60 L/min
C) CORRECT ANSWER: Discontinue NPPV and prepare for chest
decompression
D) Increase EPAP to 12 cm H2O
Rationale: Sudden hypoxemia with absent breath sounds suggests
tension pneumothorax, a known complication of NPPV. Discontinue
NPPV immediately and prepare for needle decompression/chest tube.
Increasing pressures would worsen the pneumothorax.
Scenario 5: A neonate with RDS on SIMV: rate 30, PIP 22 cm H2O,
PEEP 6 cm H2O, FiO2 0.45, inspiratory time 0.35 sec. ABG: pH 7.28,
PaCO2 58 mm Hg, PaO2 72 mm Hg. What adjustment is most
appropriate?
, A) Increase PEEP to 8 cm H2O
B) CORRECT ANSWER: Increase PIP to 25 cm H2O
C) Increase rate to 40 breaths/min
D) Decrease inspiratory time to 0.25 sec
Rationale: Hypercapnia (PaCO2 58) indicates hypoventilation.
Increasing PIP improves tidal volume and CO2 removal. Increasing rate
in a neonate may not improve alveolar ventilation if Vt is low.
Increasing PEEP addresses oxygenation, not ventilation.
Scenario 6: A 34-year-old trauma patient has severe hypoxemia
(PaO2/FiO2 ratio 110) with bilateral infiltrates. Plateau pressure is 34
cm H2O on VCV (Vt 420 mL, rate 24, FiO2 1.0, PEEP 12). Which
strategy is most likely to improve oxygenation?
A) Increase Vt to 500 mL
B) Decrease PEEP to 8 cm H2O
C) CORRECT ANSWER: Perform a recruitment maneuver followed by
increasing PEEP to 16 cm H2O
D) Switch to APRV with Phigh 30, Plow 0
Rationale: The patient has ARDS with refractory hypoxemia and
acceptable plateau pressure (<35). Recruitment maneuver with higher
PEEP (15-18 cm H2O) can open collapsed alveoli and improve
COMPLETE ACCURATE WITH WELL ELABORATED ANSWERS WITH
DETAILED RATIONALES (100% CORRECT VERIFIED SOLUTIONS)
CURRENTLY UPDATED VERSION 2026 EDITION |GUARANTEED
SUCCESS A+ (BRAND NEW!) |FULL REVISED RRT CLINICAL
SIMULATIONS (CSE) NBRC APPROVED EXAM
Scenario 1: A 58-year-old male with a history of COPD is admitted with
increased shortness of breath, productive cough, and fever. Arterial
blood gas (ABG) on room air shows: pH 7.29, PaCO2 68 mm Hg, PaO2
55 mm Hg, HCO3- 28 mEq/L. The patient is alert but tachypneic. What
is the most appropriate initial intervention?
A) Intubate and initiate mechanical ventilation with a tidal volume of 10
mL/kg
B) Apply noninvasive positive pressure ventilation (NPPV) with an
IPAP of 12 cm H2O and EPAP of 6 cm H2O
C) CORRECT ANSWER: Apply noninvasive positive pressure
ventilation (NPPV) with an IPAP of 12 cm H2O and EPAP of 6 cm
H2O
D) Administer a 100% non-rebreather mask at 15 L/min
Rationale: The patient has acute-on-chronic respiratory acidosis (pH
<7.30) but is alert and has COPD. NPPV is indicated to improve
ventilation, reduce PaCO2, and decrease work of breathing while
avoiding intubation. A non-rebreather would not lower PaCO2, and
intubation is not yet necessary.
,Scenario 2: A 45-year-old female with status asthmaticus is intubated
and on volume-controlled ventilation (VCV): Vt 450 mL, rate 14, FiO2
0.8, PEEP 5 cm H2O. Peak airway pressure is 52 cm H2O, plateau
pressure is 38 cm H2O. Which action would most reduce the risk of
barotrauma?
A) Increase the respiratory rate to 18 breaths/min
B) Change to pressure-controlled ventilation (PCV) with a set pressure
of 30 cm H2O
C) CORRECT ANSWER: Change to pressure-controlled ventilation
(PCV) with a set pressure of 30 cm H2O
D) Add inhaled nitric oxide at 20 ppm
Rationale: High plateau pressure (>30 cm H2O) indicates risk of
alveolar overdistention. PCV limits driving pressure and may lower peak
and plateau pressures by adjusting flow delivery, reducing barotrauma
risk. Rate increase would not lower pressure; nitric oxide is for
refractory hypoxemia.
Scenario 3: A 70-year-old post-cardiac arrest patient has the following
ABG on VCV: pH 7.51, PaCO2 30 mm Hg, PaO2 90 mm Hg, HCO3-
24 mEq/L, FiO2 0.4, rate 15, Vt 600 mL. What ventilator change is
indicated?
A) Increase FiO2 to 0.6
B) Decrease set rate to 12 breaths/min
C) CORRECT ANSWER: Decrease set rate to 12 breaths/min
,D) Add PEEP to 15 cm H2O
Rationale: Patient has respiratory alkalosis (pH >7.45, PaCO2 <35).
Decreasing the rate will increase PaCO2 by reducing minute ventilation,
normalizing pH. FiO2 is adequate (PaO2 90), and PEEP does not
address alkalosis.
Scenario 4: A 62-year-old male with CHF is on NPPV for acute
pulmonary edema. SpO2 drops from 94% to 82% after 30 minutes. Lung
auscultation reveals decreased breath sounds over the right hemithorax.
Which immediate action is most appropriate?
A) Increase IPAP to 18 cm H2O
B) Switch to high-flow nasal cannula at 60 L/min
C) CORRECT ANSWER: Discontinue NPPV and prepare for chest
decompression
D) Increase EPAP to 12 cm H2O
Rationale: Sudden hypoxemia with absent breath sounds suggests
tension pneumothorax, a known complication of NPPV. Discontinue
NPPV immediately and prepare for needle decompression/chest tube.
Increasing pressures would worsen the pneumothorax.
Scenario 5: A neonate with RDS on SIMV: rate 30, PIP 22 cm H2O,
PEEP 6 cm H2O, FiO2 0.45, inspiratory time 0.35 sec. ABG: pH 7.28,
PaCO2 58 mm Hg, PaO2 72 mm Hg. What adjustment is most
appropriate?
, A) Increase PEEP to 8 cm H2O
B) CORRECT ANSWER: Increase PIP to 25 cm H2O
C) Increase rate to 40 breaths/min
D) Decrease inspiratory time to 0.25 sec
Rationale: Hypercapnia (PaCO2 58) indicates hypoventilation.
Increasing PIP improves tidal volume and CO2 removal. Increasing rate
in a neonate may not improve alveolar ventilation if Vt is low.
Increasing PEEP addresses oxygenation, not ventilation.
Scenario 6: A 34-year-old trauma patient has severe hypoxemia
(PaO2/FiO2 ratio 110) with bilateral infiltrates. Plateau pressure is 34
cm H2O on VCV (Vt 420 mL, rate 24, FiO2 1.0, PEEP 12). Which
strategy is most likely to improve oxygenation?
A) Increase Vt to 500 mL
B) Decrease PEEP to 8 cm H2O
C) CORRECT ANSWER: Perform a recruitment maneuver followed by
increasing PEEP to 16 cm H2O
D) Switch to APRV with Phigh 30, Plow 0
Rationale: The patient has ARDS with refractory hypoxemia and
acceptable plateau pressure (<35). Recruitment maneuver with higher
PEEP (15-18 cm H2O) can open collapsed alveoli and improve
