Sigh Feature - PHILIPS Respironics Trilogy 202 User Manual

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For the active circuit in volume modes, peak flow is required to be
a minimum of 20 l/min. The wave form may be flattened when the
combination of Inspiratory Time and Tidal Volume set points would
result in a flow of less than 20 l/min. Therefore, for some settings,
a Ramp flow pattern may provide a pattern that more closely
resembles a Square flow pattern.

Sigh Feature

The sigh feature is available for Volume ventilation modes only.
When the sigh feature is enabled, the ventilator delivers a sigh breath
in place of every 100th mandatory or assisted breath delivered
regardless of the mode of operation (i.e., AC, CV, and SIMV). The Sigh
breath is delivered using a volume equal to 150% of the set volume
that was in effect when the breath was initiated.
FLOW
Example of Sigh Feature
TIME
Chapter 3 Modes, Features, and Alarms