We use the Therapy air guards on all off our air flowmeters, after a very disappointing discovery that clinical staff cannot tell black from white.
We also have a trust wide policy that states:
'Continue to ensure that the flow meters are removed from the wall outlet and stored in an allocated place when not in use.'
We have also recently had issues with incorrect selection of suction for use in emergency, when a Thoracic device was used, instead of the High suction required, again these devices are clearly colour coded.
So perhaps there is no hope and the basic training of clinical staff is what needs reviewing. As there are some issues that even the greatest technicians cannot solve!