3A HEALTH CARE COMP-A NEB Manual De Instrucciones página 11

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Valve (1) opens due to the pressure applied by the user during the inhalation
phase. The additional air flow, is drawn by Venturi effect by the depression in
the spray generation area (2). This flow increases considerably the external
convey of the spray , towards the user (3). The exhaust valve (4) remains
closed and no nebulisation dispersion occurs.
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The user terminates the inhalation phase and the valve (1) goes back to the
idle position, closing the convey of additional air. The external convey of the
spray generated by the nebuliser is therefore inhibited and is available for
the next inhalation phase. Druing the exhalation phase, the user generates a
pressure increase that opens the exhaust valve (4) that lets out the exhaled air.
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