Philips Trilogy 200 manual Spontaneous/Timed S/T Mode

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Spontaneous/Timed (S/T) Mode

In Spontaneous/Timed (S/T) mode, the device delivers bi-level pressure support. This mode provides Spontaneous and Mandatory breaths. A Mandatory breath is delivered if the patient does not spontaneously breathe within the prescribed Breath Rate (BPM) setting. This ensures that the patient receives a minimum number of breaths per minute. In this mode, an IPAP is delivered during inhalation and a lower EPAP is delivered during exhalation. The duration of a Spontaneous breath is determined by the patient effort. The duration of a Mandatory breath is determined by the inspiratory time setting. The following illustration describes these concepts.

		IPAP = 26 cm H2O		1	= Pressure Supported
		EPAP = 6 cm H2O			Spontaneous Breath
		Rate = 10 BPM		2	= Mandatory Breath
		PS = IPAP - EPAP = 20 cm H2O			(note longer inspiratory
					time)
PRESSURE
	6 seconds		6 seconds	6 seconds
26
20
						S/T Mode
10	1	1		2	1
6
	Enter S/T mode
	5	10	15		20	TIME

Chapter 3 Modes, Features, and Alarms