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# Basic Concepts (1 of 2) * Four basic parameters are most descriptive of mechanical ventilation * Pressure * Volume * Flow * Time * These parameters are plotted against each other to reflect the patient condition and pathological changes. # Basic Concepts (2 of 2) * Waveform scal...

# Basic Concepts (1 of 2) * Four basic parameters are most descriptive of mechanical ventilation * Pressure * Volume * Flow * Time * These parameters are plotted against each other to reflect the patient condition and pathological changes. # Basic Concepts (2 of 2) * Waveform scalars are variables plotted against time * Flow over time * Volume over time * Pressure over time * Loops are composed of inspiratory and expiratory curves * Flow-volume loop * Pressure-volume loop provides quick information on specific changes in lung function # Clinical Example * A post-open heart patient is brought a volume ventilator on the following parameters * Tidal Volume (VT) 550 mL or 0.5 * Respiratory Frequency (f) 15 breaths * Inspiratory Flow Rate (V̇) 45 L/min * Airways Resistance (RAW) 7 cm H₂O