Isn't it too drastic to clean a baby's nose with a vacuum cleaner ?

No, it isn't. As the apparatus sucks with the help of the vacuum cleaner, but not with its strength. The apparatus adjusts itself. As the vacuum cleaner makes it possible to suck continuously, the …

Is it necessary to use a vacuum cleaner/hoover?

The secretion can not be removed from the nasal cavities, unless you have strong continuous suction.

The device is tested by internationally recognized bodies