We check the Verathon BVI 9400 units with their calibration tank, but we cannot verify Verathon's older units.

The Bardscanner units we have can be verified against a phantom load; however the model recommended is 3k to 4k.

I personally would much prefer to verify bladder scanners against a known volume of fluid rather than a strangely shaped piece of plastic like Verathon uses(it bears absolutely no relation to the shape of a bladder) in a water tank.

I have found a phantom load with a 130ml volume this is verified to be with in 2%; however the manufacturer says that the Verathon units detect up to 170ml on these phantoms.


Don't forget "we've never had it so good".