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#74773 16/12/19 7:20 AM
Joined: Sep 2018
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Joined: Sep 2018
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when i set the tidal volume on my AV900 Ventilator that doesnot reflects on the Bellow.The Bellow gives different Volume.What could possibly the issue?thnx

Joined: Jun 2014
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The AV900 despite its age has 'fresh gas compensation' . The bellows movement will be automatically increased or decreased with fresh gas flow from the flow meters.

High fresh gas flow = smaller bellows movement.
Low fresh gas flow = larger bellows movement.

In compensating ventilators the numbers on a bellows canister are only an indication of output accuracy when compensation is switched off.

The only true to assess the output accuracy of a ventilator is to use use an external flow measuring device.


Moderated by  DaveC in Oz, RoJo 

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