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Chapter 7
7-4 Respironics V200 Ventilator Operator’s Manual REF 1057983 A
Operating Theory
Continuous Positive Airway Pressure (CPAP)
CPAP is a spontaneous mode of ventilation. No mandatory breaths are
delivered. Throughout the breath cycle, an operator set pressure is provided.
The level of pressure delivered during CPAP is the baseline pressure, or PEEP
(Positive end Expiratory Pressure). Refer to Figure 7-3.
Figure 7-3: Continuous Positive Airway Pressure (CPAP)
Pressure Support Ventilation (PSV)
In Pressure Support Ventilation, the patient’s spontaneous efforts are assisted
by the ventilator at an operator set level of inspiratory pressure. Inspiration is
initiated by the patient and terminated when the inspiratory flow falls below an
operator set percentage of the peak flow during this breath. During Pressure
Support, the patient determines the respiratory rate, and the patient and
ventilator determine the inspiratory time and tidal volume. Refer to Figure 7-4.
Figure 7-4: Pressure Support Ventilation (PSV)