How long does it take for kidney stones to be removed?

In order to promote the discharge of broken kidney stones, patients need a lot of drinking water, drinking more than 2000 ml a day, so that the urinary volume increases, urine can wash stones, promote the discharge of stones. And can wash the urethra, take away some inflammatory substances in the urethra, prevent the manifestation of urinary tract infection. If stone lithotripsy is not successful, discharge is more difficult, need to interval a week later to do B ultrasound examination again, again lithotripsy treatment.