Danda dhauti is a yogic purification technique designed to remove excess bile from the stomach and excess mucus. Traditionally, danda dhauti was performed by threading a lotus or banana stem down the throat. While that method is still used, the modern way of practicing danda dhauti is to use a catheter.
dand is the sanskrit word for cloth & dhauti means Cleansing.
use this method only under supervision of a Yoga Teacher.