As a matter of fact basti is the most important item among the samshodhana procedures. However the term basti is derived from the fact that the basti yantra or the apparatus used for introducing the medicated materials is made up of basti or animal urinary bladder. Generally a basti is applied through the rectum though it may also be applied for urethra. In such cases the term Uttara basti is applied. Depending upon the use of different drugs, basti effects samshodhana of doshas. It has also samshamana effects. Thus basti in its different forms has very wide application.