Instructions for Use: GEV019-100
Page 15
delivery valves, open the Expiration valve and release all patient pressure immediately. The unit will then return to a normal cycle
and the Pmax alarm will present.
Differential pressure is used to calculate the flow measurement in the system to calculate the patient tidal volume (Vti) as
accurately as possible. Vit is controlled by gas flow which is varied by increasing and decreasing the gas feed pressure to the flow
control orifice which is multiplied by time for volume control.
The final protection against overpressure of the patient is a mechanical pressure relief valve. Located in the pressure manifold of
the inspiratory circuit inside the ventilator and is set to 70 cmH
2
O.
4.3
Single Use Components
GeVentor Expiration Valve
(GEV) is a push and turn fitting on the right-hand side of the enclosure. The Bacterial Filter and the
patient expiration hose are attached to this connection on the patient
’s expiratory limb.
The PEEP valve is mounted on the top of
the GEV. For use in Australia, the GEV is a single use device; and in case of emergency, the GEV can be cleaned for re-use only in
exceptional circumstances when the GEV is not available from the Manufacturer. In such cases, cleaning is recommended in an
autoclave where thermal disinfection, steam sterilisation or other approved cleaning techniques are used.
GeVentor Expiration Valve (GEV)
NOTE
The GEV is intended as a Single-Use device only.
Pressure Relief Valve
(Mechanical)
GeVentor Expiration
Valve (GEV)
Expiration Hose
Connection Port
(Bacterial Filter)
Inspiration Hose
Connection Port
PEEP Valve
connection end
Patient Circuit
connection end
(expiratory)
GeVentor
connection end
Body with
Diaphragm inside
Pneumotachograph
Pressure Sensor
