To understand the concepts of nadipariksha, we should first understand the concept of strotsa sirs, dhamani and nadi. We genersally relate all these as the channels of the body wihich aree assigned a job of carrying substances within the body. It is well admired fact that Maharishi Sushurut manage to trace even minute-minute channels present in the body even when they were very difficult to be traced with naked eyes. He was able to recognize the ever pore in it. It was calculated that there were about 700 siras, two hundreds dhamanees, which could be easily enumerated but when the minute siras and dhamanees were counted with there tributaries and branches, there number was estimated to be the same as the number of hair follicles which was distributed throughout the body. Approximately their number was calculated at two lakh ninety thousand five hundred and fifty six.

The study of nadi however was specialized technique which was perfected by yogi.