Certified Transport Registered Nurse Certification Practice Exam

Which ventilator mode requires the patient to be paralyzed and sedated?

1. Continuous Mandatory Ventilation (CMV)

2. Assist Control (AC)

3. Pressure Support Ventilation (PSV)

4. Spontaneous Ventilation (SV)

The correct answer is: Continuous Mandatory Ventilation (CMV)

Continuous Mandatory Ventilation (CMV) is a mode where the ventilator delivers a set number of breaths at a predetermined tidal volume or pressure regardless of whether the patient is initiating breaths. In this mode, the patient must often be paralyzed and sedated to prevent any spontaneous attempt at breathing, allowing for complete control of ventilation by the machine. This is crucial as any uncoordinated efforts by the patient can lead to ineffective ventilation, high pressure instantly, or increased work of breathing. This mode is typically used in patients who are unable to breathe effectively on their own due to severe respiratory failure or during surgical procedures where neuromuscular blockade is required. The goal is to ensure optimal oxygenation and ventilation without the interference of spontaneous respiratory efforts, which could compromise the effectiveness of mechanical ventilation and lead to patient discomfort or distress.