EBME Forums Forums Maintenance Technical Assistance Venturi Test tool

Hello EBME people.

I am in dire need of a venturi test tool, which would assist me to create a venturi effect across a patient inspiratory valve. So I can measure the lift off pressure?
I have tried a few home made creations, but they are not consistent, so over to the Guru's who inhabit these forums.
I have asked the miriad of companies who normally plague our workshop, but only one positive response so far. I would expect this to be a common problem with those who service ventillators etc?

Ideally able to create a negative pressure of no more than 10 mBar; as the lift off is usually less than 3 Mbar

any idea's ?

best regards

Mark Edmondson
Acute ICU