NBRC Mechanical Ventilation 2

Question 1

The lung-protective ventilation strategy for ARDS recommends tidal volumes of:

Accepted Answer

6 mL/kg ideal body weight

Answer

3–4 mL/kg ideal body weight

Answer

10–12 mL/kg ideal body weight

Answer

15 mL/kg ideal body weight

Question 2

Which waveform is characteristic of volume-controlled, constant-flow ventilation?

Accepted Answer

Square (constant) flow waveform

Answer

Decelerating flow waveform

Answer

Sinusoidal flow waveform

Answer

Ascending ramp flow waveform

Question 3

A patient's peak airway pressure suddenly increases with no change in plateau pressure. This suggests:

Accepted Answer

Increased airway resistance (e.g., bronchospasm, secretions)

Answer

Worsening lung compliance

Answer

Pneumothorax

Answer

Pulmonary edema

Question 4

Permissive hypercapnia in ARDS management allows PaCO2 to rise to reduce:

Accepted Answer

Barotrauma and volutrauma from aggressive ventilation

Answer

FiO2 requirements

Answer

Sedation requirements

Answer

Cardiac afterload

Question 5

Which mode is most appropriate for weaning a patient from mechanical ventilation?

Accepted Answer

Pressure support ventilation (PSV) with gradually reduced support

Answer

Assist-control with high PEEP

Answer

High-frequency oscillatory ventilation

Answer

Controlled mandatory ventilation at a fixed rate

Question 6

Synchronized intermittent mandatory ventilation (SIMV) delivers mandatory breaths that are:

Accepted Answer

Synchronized to patient inspiratory effort when present

Answer

Asynchronous with patient effort

Answer

Only pressure-controlled

Answer

Independent of set respiratory rate