Which of the following trigger levels is appropriate when setting a ventilator for flow-triggering?

Question

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Flow-triggering on a ventilator is typically set at a sensitivity level where a small decrease in flow (indicating the patient's effort to inhale) triggers the ventilator to deliver a breath. A setting of 1 to 3 L/min below baseline flow is appropriate because it is sensitive enough to detect the patient's inspiratory effort without being so sensitive that it triggers on accidental fluctuations or too insensitive to detect the effort.

Which of the Following Trigger Levels Is Appropriate When Setting