MTV1000 Ventilator System
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User’s Manual
7.2.4.
P-SIMV(Pressure based Synchronized Intermittent Mandatory
Ventilation)
This mode controls ventilation based on pressure according to spontaneous ventilation by
the patient. In other words, this mode combined control and pressure
support/spontaneous function allows for preset mandatory breaths synchronized with the
patient’s breathing.
Mechanical ventilation is paralleled based on air volume according to spontaneous
ventilation or in case there is no spontaneous ventilation using configured time period.
The spontaneous/pressure supported breaths are defined by the setting for Pressure
Support
.
WARNING
Mechanical ventilation is paralleled based on volume according to spontaneous ventilation
or in case there is no spontaneous ventilation using configured time period.
SIMV mode is a mode in which Mandatory Breath and Spontaneous Breath are mixed.
SIMV mode guarantees one mandatory breath per SIMV cycle. This mandatory breath is
either patient initiated mandatory (PIM or assisted mandatory) breath or ventilator
initiated mandatory (VIM or controlled mandatory) breath.
As in the figure below, each SIMV breath cycle is divided into two parts. One is
Mandatory Interval ™ and another is Spontaneous Interval (Ts). After delivery of PIM
breath, Mandatory Interval ends and Spontaneous Interval (Ts) begins.
If PIM breath does not occur until the end of Mandatory Interval, VIM breath is provided
to the patient as soon as Mandatory Interval ends and Spontaneous Interval begins.
