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Chapter 7
Operating Theory
REF 1057983 A Respironics V200 Ventilator Operator’s Manual 7-7
Figure 7-7: Spont/T Mode
Emergency Modes of
Ventilation
The ventilator has the following two emergency modes of ventilation that are
entered in response to certain alarm conditions:
• Apnea Ventilation
• Safety Valve Open
Apnea Ventilation
Apnea ventilation provides an emergency mode of ventilation if the ventilator
does not deliver a breath for an operator set interval of time. The apnea time
can be set between 10 and 60 seconds. Upon entering this mode of
ventilation, the ventilator will alarm and immediately start using the Apnea
Rate setting specified by the operator. In PCV and VCV, the ventilator will begin
delivering breaths in Assist/Control (A/C), but with the operator set Apnea
Rate. In NPPV, the ventilator will deliver only machine controlled breaths
either at the operator set Apnea Rate or in response to patient effort. In Apnea
ventilation, the alarms used are the ones used for machine controlled breaths
for the ventilation breath type (VCV, PCV and NPPV) the ventilator was using
when Apnea occurred.