Which of the following is NOT a mode of ventilation?

• A. Continuous mandatory ventilation
• B. Intermittent mechanical ventilation
• C. Total lung ventilation
• D. Continuous spontaneous ventilation

Answer: (C)

Total lung ventilation is not recognized as a standard mode of mechanical ventilation in clinical practice. The other options represent established modes.

Continuous mandatory ventilation allows the ventilator to deliver a set number of breaths at regular intervals, ensuring a minimum ventilation level while allowing the patient to take spontaneous breaths in between. Intermittent mechanical ventilation combines both controlled mechanical breaths and spontaneous breaths, facilitating a balance between support and patient effort. Continuous spontaneous ventilation provides assistance for spontaneous breaths without mandatory control, often used in patients who are able to initiate breaths independently.

In contrast, "total lung ventilation" does not correlate with any established mode of ventilation, making it the correct response in this context as it lacks the clinical applicability or definition found in recognized mechanical ventilation practices.