NBRC Mechanical Ventilation

Question 1

Which ventilator mode delivers a set tidal volume regardless of airway resistance or compliance changes?

Accepted Answer

Volume control ventilation (VCV)

Answer

Pressure control ventilation (PCV)

Answer

Pressure support ventilation (PSV)

Answer

CPAP

Question 2

Plateau pressure should ideally be kept below which threshold to reduce ventilator-induced lung injury (VILI)?

Accepted Answer

30 cmH2O

Answer

20 cmH2O

Answer

25 cmH2O

Answer

40 cmH2O

Question 3

PEEP (positive end-expiratory pressure) is used primarily to:

Accepted Answer

Prevent alveolar collapse and improve oxygenation

Answer

Decrease mean airway pressure

Answer

Reduce the work of breathing by eliminating auto-PEEP

Answer

Decrease functional residual capacity

Question 4

Auto-PEEP (intrinsic PEEP) occurs when:

Accepted Answer

Insufficient expiratory time prevents full exhalation before the next breath

Answer

Set PEEP exceeds 10 cmH2O

Answer

Inspiratory time is too short

Answer

Tidal volume is set below 6 mL/kg IBW

Question 5

In pressure support ventilation (PSV), the ventilator:

Accepted Answer

Provides a fixed pressure boost to patient-initiated breaths

Answer

Controls both rate and tidal volume

Answer

Delivers mandatory breaths independent of patient effort

Answer

Cycles based on a set inspiratory time

Question 6

Which parameter is used to calculate static compliance on a mechanically ventilated patient?

Accepted Answer

Plateau pressure minus PEEP divided by tidal volume

Answer

Peak pressure minus PEEP divided by tidal volume

Answer

Mean airway pressure divided by respiratory rate

Answer

Tidal volume divided by peak inspiratory flow