What are the procedures to obtain the f/VT Ratio?

What will be an ideal response?


1. allow the patient at least three minutes to stabilize the spontaneous breathing pattern
(ventilator frequency must be off and PSV should not be used if tolerated by patient)
2. measure expired volume and respiratory frequency for one minute
3. divide minute volume by frequency (f) to obtain an average tidal volume (VT) in liters
4. divide frequency by VT to obtain f/VT ratio (breaths/min/L)

Health Professions

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