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Dräger Medizintechnik GmbH
Function Description Savina Version 2.0
Page 364
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The independent pneumatic safety valve D1 ensures that the respiratory pressure can never rise
above the legally prescribed limit of 120 mbar. In the event of inspiratory stenosis the pressure is
limited by opening the expiratory valve. The mechanical negative-pressure valve D2 ensures
(except in the case of inspiratory stenosis) that the patient can breathe spontaneously from the
ambient air in case of a fault.
The emergency vent valve V9 relieves the pressure in the breathing system in a case of expiratory
stenosis if the pressure cannot be relieved through the expiratory valve. The pilot valve V8
operates the emergency vent valve V9.
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The drug nebulizer is operated with 100% O
2
. The supply pressure regulator DR1 ensures, with
widely varying supply pressure (2.7 to 6.0 bar), that the pneumatic drug nebulizer receives a
constant supply pressure of 2.0 bar.
When the nebulizer function is active the solenoid valve V5 operates in an "inspiration" (open
position) / "expiration" (closed position) cycle. When the nebulizer function is inactive valve V5 is
permanently closed.
