A young bank manager presented with acute severe lower abdominal pain which is radiating towards inguinal region. USG shows renal stones. Conservative management in this patient is indicated when:

Most ureteral calculi pass and do not require intervention. Spontaneous passage depends on stone size, shape, location, and associated ureteral edema (which is likely to depend on the length of time that a stone has not progressed). Ureteral calculi 4-5 mm in size have a 40-50% chance of spontaneous passage. In contrast, calculi >6 mm have a The vast majority of stones that pass do so within a 6-week period after the onset of symptoms. All other options are indications for intervention. Ref: Stoller M.L. (2008). Chapter 16. Urinary Stone Disease. In E.A. Tanagho, J.W. McAninch (Eds), Smith's General Urology, 17e.