Background: Open surgery was considered as the mainstay of  treatment of renal calculi up to the eighties. With the rapid develop ppment of minimally invasive surgery (minimal access surgery) since then ,endourology replaced open surgery as the treatment of choice for most urinary calculi. Almost simultaneously came the advance in the form of a completely non invasive approach in the form of ESWL. This revolutionized treatment of urinary calculous disease  either as a monotherapy or in combination with

endourological procedures such as percutaneous Nephrolithotripsy and ureterorenoscopy, replaced open surgery almost completely.

Materials & Methods: A prospective study was carried out on 90 patients presented to the surgical OPD of tertiary care teaching hospital in Mumbai between October 2013 to April 2015 with Urolithiasis. After taking complete history a thorough clinical examination done & required investigations performed. Patients were then underwent ESWL. All the post procedure findings were recorded under specific parameters.

Results & Conclusions:Based on results of our study and interpreting it  in the context of  available literature on the subject we reached the following conclusions;ESWL is an excellent, safe, non invasive modality with minimal morbidity, hospital stay and complications for  the treatment of a certain subset of patients with  urinary calculi in the kidney and to the level of the mid ureter  up to 2.5cm in size.. There are several variables affecting the outcome of ESWL and this is the most important thing to be kept in mind  in trying to achieve a complete stone free state in a patient,.