Respironics Trilogy 100 Technical Information page 62

5.5.2 M S
ODE ETTING
You can change the Mode setting on the Setting and Alarms screen to one of the following therapy modes:
•
CPAP - Continuous Positive Airway Pressure
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S - Spontaneous Ventilation
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S/T - Spontaneous/Timed Ventilation
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T - Timed Ventilation
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PC - Pressure Control Ventilation
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PC-SIMV - Pressure Controlled Synchronized Intermittent Mandatory Ventilation
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CV - Control Ventilation
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AC - Assist Control Ventilation
•
SIMV - Synchronized Intermittent Mandatory Ventilation
5.5.3 C T
IRCUIT YPE
There are two types of circuit types you can select:
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Passive
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Active PAP
•
Active Flow (Trilogy 200, Trilogy O
The Passive circuit uses the Whisper Swivel II passive exhalation device. The Active PAP circuit type uses an
active exhalation device with a proximal air pressure sensing connection. The Active Flow circuit type uses an
active exhalation device with a proximal flow sensor.
When using the Passive circuit, the ventilator displays estimated patient pressures based on the resistance of
the standard patient circuit (Whisper Swivel II with 1.8 meter tubing). Adding accessories to the patient circuit
(humidifier, water trap, etc.) may cause an increase in circuit resistance and cause the device to display slightly
higher pressures than what is actually delivered to the patient.
With the Active PAP or Active Flow circuit type selected, patient pressure is measured directly and is not
affected by any change in circuit resistance.
The Passive circuit provides leak compensation. When using the Passive circuit in Volume Ventilation, the set
Vti is delivered to the patient above the calculated circuit and cuff (or mask) leak. This is different from
traditional active circuit ventilation where the cuff (or mask) leak reduces the tidal volume delivered to the
patient. Volume ventilation with the Passive circuit delivers an inspiratory tidal volume close to the device
setting regardless of leak; this should be considered when transitioning a patient from an active to a passive
circuit. With a Passive circuit, Vte is estimated based on the calculated sum of circuit and cuff (or mask) leak.
The Active Flow circuit monitors proximal flow and proximal pressure. When using the Active Flow circuit
configuration, flow trigger with leak compensation may be enabled. The default setting when using the Active
Flow Circuit is Leak Compensation On. The clinician has the option to turn off the leak compensation;
1002735, V . 05
ER
, & Trilogy 202 Only)
2
T S & T
RILOGY ERVICE ECHNICAL
I
NFORMATION
P 5-13
AGE