3-3.5cm gallbladder stone

Hi,
My mother has a gallbladder stone and is planning to flush it. In this connection, I would like to seek information from all of you who have experienced gallbladder flushing and from the experts the possibility of safely flushing the said stone. What are safe measures to be followed in order not for the stone to get stucked in the ducts? Trusting that this inquiry will merit your kind gestures.

God Bless!

Macy