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Alarm specifications
• High maximum mask pressure alarm
Stops air delivery at 30 cm H
2
O >700 msec.
• High mean mask pressure alarm
Stops air delivery when mean mask pressure exceeds 22 cm H
2
O (averaged
over approx 1 minute).
• Low mask pressure alarm
Mask pressure is less than 3 cm H
2
O for longer than 5 seconds while the
patient is using the VPAP Adapt SV.
• Insufficient pressure support alarm
Is triggered if for 3 breaths in a row the maximum mask pressure achieved at
inspiratory to expiratory transition is either <87.5% of the absolute mask
pressure targeted at that point, or < absolute mask pressure targeted minus
1 cm H
2
O, whichever is the lower.
• High leak alarm
Leak exceeds 30 L/min for more than 20 seconds.
• Flow blocked alarm
Flow is less than 6 L/min for more than 20 seconds.
IEC 601-1 classifications
Class II, Type CF
Class II medical electrical equipment provides protection against electric shock
either by double insulation or reinforced insulation and does not require a
protective earth.
Inspiratory Trigger Characteristics
The inspiratory trigger occurs at a flow greater than 0 LPM when tested with
EPAP=5 cm H
2
O, IPAP=15 cm H
2
O, sinisoidal breath shape. The inspiratory
trigger response time is <600 ms when tested with EPAP=5 cm H
2
O,
IPAP=15 cm H
2
O, 0.67 L/sec inspiratory and expiratory flow rate. The time is
measured from the beginning of inspiratory flow to the beginning of pressure
rise to IPAP.
Note: The ASV algorithm is designed to treat a patient with essentially normal
lungs. Hence, trigger response is less sensitive and pressure ramp-up is more
gentle than typical non-invasive ventilators.
228234 VPAP Adapt SV User Guide USA Eng.book Page 34 Monday, October 13, 2008 2:15 PM