Northern Meditec Crius V6, Operator'S Manual

Page: 71 / 182

71 / 182
2. Parameter setup quick key field
Displays ventilation setting parameters corresponding to the active ventilation mode.
Selecting displays more ventilation setting parameters. The parameters of
sigh function, ATRC function, Apnea Vent and other parameters are also set here.
Ventilation parameters vary subject to the ventilation mode.
6.5.2 Apnea Ventilation
Apnea ventilation is a backup ventilation mode initiated when the ventilator detects patient
apnea in CPAP/PSV and CPAP-VG modes. Apnea ventilation can exit only under the
following circumstances: patient’s spontaneous breathing has been detected continuously
twice, ventilation mode is switched over, or apnea ventilation is switched off (in SIMV
modes).
This ventilator provides one types of apnea ventilation mode: volume-controlled apnea
ventilation.
Volume-controlled apnea ventilation means that tidal volume, breathing frequency, and
inspiration time in the apnea ventilation cycle can be set in the mode supporting apnea
ventilation. After entering apnea ventilation, the ventilator executes PRVC ventilation with
the set tidal volume, breathing frequency, and inspiration time in the apnea ventilation cycle
(other parameter’s setting values are unchanged).
CAUTION

You are suggested to initiate apnea ventilation in SIMV mode.
6.5.3 VC-ACV
VC-ACV (Volume Controlled– Assist Control Ventilation) is a ventilation mode in which the
ventilator controls the ventilation, but it can be influenced by the patient. The inspiration is flow
controlled until the inspiratory volume is delivered, after this the plateau phase is pressure
controlled (maintains inspiratory pressure) and the expiration is pressure controlled (maintains
PEEP level). The patient can not breathe spontaneously during inspiration until the plateau
phase, because it is flow controlled. During plateau phase and expiration phase spontaneous
breathing is possible.
The strokes are time cycled with a fixed inspiratory time and a fixed expiratory time, when the
patient does not breathe spontaneously. However, during expiration an inspiration can be
triggered by the patient. This can lead to an increase of the breathing frequency or respiratory