A5/A3™ Operating Instructions 046-003777-00 5 - 19
Operations Start Mechanical Ventilation
3. Select the Set Mode softkey to confirm.
PS parameters:
• Min Rate: Minimum rate (bpm), applies to apnea backup breaths only
• ΔP: Change in pressure (cmH
2
O)
• Trigger: Flow trigger level (L/min)
• PEEP: Positive end-expiratory pressure (cmH
2
O)
• Tslope: Rise time (sec)
• Apnea Ti: Apnea Inspiratory Time
NOTE: Apnea Ti permits the user to vary the inspiratory time of the apnea
backup breaths. Apnea backup breaths are only triggered when the
patient does not achieve the Min Rate that is set by the user. If the
patient’s spontaneous breaths meet or exceed the Min Rate, the apnea
backup is not used.
NOTE: Before activating a new mechanical ventilation mode, ensure that all
related parameters are set appropriately.
5.7 Start Mechanical Ventilation
NOTE: Before starting a new mechanical ventilation mode, ensure that all
related ventilation parameters are set appropriately.
To start mechanical ventilation from Standby mode:
1. Set the Auto/Manual ventilation switch to Manual.
2. Exit Standby by touching the main screen or by turning on the fresh gas flow to more than
0.2 L/min.
3. Set the Auto/Manual ventilation switch to Auto. The A5/A3 system will begin mechanical
ventilation.
5.8 Stop Mechanical Ventilation
To stop mechanical ventilation:
1. Ensure that the breathing system is set up and the APL valve is set properly before stopping
mechanical ventilation.
2. Set the Auto/Manual Bag switch to the Manual Bag position. This selects manual
ventilation and stops mechanical ventilation.
5.9 Relationships of Ventilation Parameters
Ventilation modes may share the same ventilation parameters and values. For example, SIMV-VC
and VCV both include Vt, Plimit, Rate, Tpause, and PEEP. Therefore, these parameter values that
are linked may be passed from the previous ventilation mode to the current mode. Section
C.8
‘‘Linked Ventilation Parameter’’ on page C-13 includes a table that lists how the linked parameter
values are set when changing ventilation modes.
Ventilation parameter values that are non-linked are set according to relationship equations.
Section
C.9‘‘Ventilation Parameter Relationships’’ on page C-15 includes a table of equations to
show how non-linked parameter values are set when changing ventilation modes.
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