Ventilation Modes Operations
5 - 18 046-003777-00 A5/A3™ Operating Instructions
• Tpause: Inspiratory pause (%)
• PEEP: Positive end-expiratory pressure (cmH
2
O)
• Plimit: Pressure limit level
• Trigger: Flow trigger level (L/min)
• PS: Pressure support (On/Off)
• ΔP: Change in pressure (cmH
2
O)
• Tslope: Rise time (sec)
SIMV-PC (A5 only) parameters:
• Pinsp: Peak inspiratory airway pressure (cmH
2
O)
• Rate: Breath rate (bpm)
• Tinsp: Time of inspiration (sec)
NOTE: The screen displays the calculated I:E ratio based on Rate and Tinsp
when adjusting the Tinsp (software bundle version 02.06.00 and later).
• Trigger: Flow trigger level (L/min)
• PEEP: Positive end-expiratory pressure (cmH
2
O)
• Tslope: Rise time (sec)
• PS: Pressure support (On/Off)
• ΔP: Change in pressure (cmH
2
O)
NOTE: Before activating a new mechanical ventilation mode, ensure that all
related parameters are set appropriately.
5.6.10 Pressure Support Ventilation (PS)
In Pressure Support (PS) mode, the patient’s effort is supported by the A5/A3 at a preset level of
inspiratory pressure. Inspiration is triggered and cycled by patient effort.
The user can set the Trigger flow, ΔP, PEEP, minimum allowed breathing frequency, and Slope
Time. If the Min Rate (bpm) is violated, the A5/A3 will give an Apnea Ventilation breath to assure
ventilation is occurring.
FIGURE 5-16 Pressure Support Tab
5.6.10.1 To Set PS Mode
1. Select the PS tab on the Main Screen.
2. Check that all PS parameters are set appropriately.
If necessary, select the parameter softkey to edit the parameters settings (see FIGURE 5-16).
You can use the digital keyboard on the screen to enter the desired value, or continuously
press the or buttons to rapidly increase or decrease the parameter values.
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