Instructions for Use | Therapy Modes and Controls
Mixed Modes 23
Mixed Modes
S/T: Spontaneous/Timed
DESCRIPTION:
A bi-level therapy mode where each breath is patient-triggered and patient-cycled or ventilator-triggered and ventilator-cycled. 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. Remember that the IPAP setting is the maximum
pressure the ventilator will deliver; it is not in addition to the EPAP setting.
SETTINGS:
Inspiratory positive airway pressure
Must be greater than or equal to EPAP
Expiratory positive airway pressure
Time required for the ventilator to change from the expiratory pressure setting to the inspiratory pressure
setting when the breath is triggered.
Minimum rate of breaths per minute. If the patient doesn’t trigger a breath within this time, the ventilator
triggers the breath.
For a mandatory breath, length of the inspiratory phase
• Sensitive Auto-Trak (passive circuits only)
• Flow Trigger (Passive, Active PAP, Active Flow, or Dual Limb circuits)
This control is available when the trigger type is Flow Trigger. The flow trigger initiates when the patient’s
inspiratory effort creates a flow equal to or greater than the flow trigger sensitivity setting.
Sensitivity
This control is available when the trigger type is Flow Trigger
As flow begins to decrease during inspiration, if the patient flow is less than the flow cycle set point, the
device cycles to expiration.
SETTABLE ALARMS:
• Circuit disconnect
• High tidal volume
• Low tidal volume
• High minute ventilation
• Low minute ventilation
• High respiratory rate
• Low respiratory rate
ILLUSTRATION:
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