Northern Meditec Crius V6, Operator'S Manual

Page: 76 / 182

76 / 182
7. [Trigger]: Inspiration trigger level
8. [O
2
%]: Oxygen concentration
In PC-ACV mode, you can set the following sigh function parameters as required:
1. [ Sigh ]: Switch for turning on sigh function
2. [ Interval ]: Number of sigh cycles
3. [ Delta Pinsp ]: Pinsp added in sigh cycle
6.5.6 VC-SIMV
VC-SIMV (Volume Controlled–Synchronized Intermittent Mandatory 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 cannot 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, during a trigger window. This window starts after the time set by
Texpspon has elapsed. The period the inspiration is started earlier is compensated in the next
expiration. This prevents an increase of the average respiratory rate(RR). The expiration time
can differ due to previous triggering.