FCCS POST-TEST REVIEW 2026–2027 | Questions & Answers | Vent Management, ABG, Sepsis, Cardiology & Pregnancy Emergencies

FCCS POST-TEST REVIEW 2026–2027 |
Questions & Answers | Vent Management,
ABG, Sepsis, Cardiology & Pregnancy
Emergencies

FCCS POST-TEST REVIEW 2026–2027

Questions & Answers | Vent Management, ABG, Sepsis, Cardiology &
Pregnancy Emergencies



DOCUMENT OVERVIEW

• This comprehensive review contains carefully curated multiple-choice questions
spanning critical care essentials, designed to reinforce clinical knowledge and
prepare you for advanced certification exams.

• Study strategy: Work through each topic section sequentially, focus on
understanding the rationales provided, and revisit weak areas to build mastery of
core critical care concepts.




SECTION 1: VENTILATOR MANAGEMENT (Questions 1–40)



1. A 65-year-old male patient is on mechanical ventilation with the following
settings: AC mode, Vt 500 mL, rate 12/min, PEEP 5 cm H₂O. Which parameter
most directly affects alveolar ventilation?

A) PEEP level

B) Tidal volume and respiratory rate

C) FiO₂ concentration

D) Inspiratory time

E) Ventilator mode selection

,✓ CORRECT ANSWER: B) Tidal volume and respiratory rate

RATIONALE: Alveolar ventilation is determined by the formula: VA = (Vt - Vd) × RR,
where Vt is tidal volume, Vd is dead space, and RR is respiratory rate. Both tidal
volume and respiratory rate directly influence how much fresh gas reaches the
alveoli for gas exchange. PEEP improves oxygenation but does not directly affect
alveolar ventilation. FiO₂ affects oxygen partial pressure but not ventilation itself.
Inspiratory time affects I:E ratio but not the total volume ventilated.



2. A patient on mechanical ventilation develops auto-PEEP (air trapping).
What is the primary mechanism leading to this complication?

A) Inadequate inspiratory flow rate

B) Insufficient expiratory time relative to respiratory rate

C) Excessive PEEP setting

D) High oxygen concentration

E) Improper endotracheal tube placement

✓ CORRECT ANSWER: B) Insufficient expiratory time relative to respiratory
rate

RATIONALE: Auto-PEEP develops when the respiratory rate is too high or inspiratory
time is too long, preventing complete exhalation before the next breath is
delivered. This is particularly common in obstructive airway disease (COPD, asthma)
where airway resistance is elevated. The incomplete exhalation causes air to be
"trapped" in the alveoli at the end of expiration, creating positive pressure.
Increasing expiratory time, decreasing respiratory rate, or reducing I:E ratio can
prevent this complication.



3. Which ventilator mode allows patients to trigger breaths while receiving a
guaranteed minimum minute ventilation?

A) Assist-Control (AC) ventilation

,B) Synchronized Intermittent Mandatory Ventilation (SIMV)

C) Pressure Support Ventilation (PSV)

D) Volume Guarantee (VG) mode

E) Continuous Positive Airway Pressure (CPAP)

✓ CORRECT ANSWER: D) Volume Guarantee (VG) mode

RATIONALE: Volume Guarantee is a dual-control mode that guarantees a set tidal
volume while allowing patient triggering. The ventilator adjusts the pressure
delivered to maintain the target tidal volume despite changes in lung compliance or
resistance. SIMV allows mandatory breaths and spontaneous breaths but doesn't
guarantee tidal volume on spontaneous efforts. AC ventilation delivers set tidal
volumes but may not allow adequate patient triggering. PSV is purely pressure-
limited and does not guarantee a specific tidal volume. CPAP provides only
pressure support without mandatory breaths.



4. A mechanically ventilated patient has a peak inspiratory pressure (PIP) of
55 cm H₂O with a plateau pressure (Pplat) of 32 cm H₂O. What does the
elevated PIP-to-Pplat gradient indicate?

A) Severe ARDS

B) Increased airway resistance

C) Decreased lung compliance

D) Right mainstem intubation

E) Ventilator asynchrony

✓ CORRECT ANSWER: B) Increased airway resistance

RATIONALE: The difference between peak inspiratory pressure (PIP) and plateau
pressure (Pplat) reflects airway resistance. A large gradient (>15 cm H₂O) indicates
high airway resistance from secretions, bronchospasm, kinked tubing, or tube
obstruction. Plateau pressure reflects static compliance of the lungs and chest wall;
if Pplat is normal but PIP is elevated, the problem is resistance, not compliance.

, ARDS would manifest as elevated Pplat. Mainstem intubation would cause
asymmetric breath sounds and elevated pressures on one side only.



5. You are weaning a patient from mechanical ventilation. Which parameter is
most predictive of successful extubation?

A) Respiratory rate of 20 breaths/min

B) Rapid Shallow Breathing Index (RSBI) <105

C) Tidal volume >5 mL/kg predicted body weight

D) SpO₂ >94% on FiO₂ 0.4

E) Negative inspiratory force (NIF) of -20 cm H₂O

✓ CORRECT ANSWER: B) Rapid Shallow Breathing Index (RSBI) <105

RATIONALE: The RSBI, calculated as respiratory rate divided by tidal volume (RR/Vt),
is the most reliable single predictor of successful extubation with sensitivity >90%.
An RSBI <105 breaths/min/L indicates adequate respiratory muscle strength and
endurance. Values >105 predict extubation failure. While NIF, Vt, and SpO₂ are
important parameters, no single parameter is more predictive than RSBI. A
respiratory rate of 20 is acceptable but not independently predictive of success.



6. A patient on AC ventilation with Vt 450 mL and RR 14 develops respiratory
acidosis (pH 7.28, PaCO₂ 58 mmHg). What is the most appropriate initial
adjustment?

A) Increase FiO₂ to 100%

B) Increase tidal volume to 600 mL

C) Increase respiratory rate to 18–20 breaths/min

D) Add 10 cm H₂O PEEP

E) Switch to pressure control ventilation

✓ CORRECT ANSWER: C) Increase respiratory rate to 18–20 breaths/min