Ureteric colic due to stone is caused by:
Acute obstruction of ureter d/t calculus or other objects causes 2 types of pain: Non-colicky renal pain d/t distension of the renal capsule occurs at a costoveebral angle just lateral to the sacrospinalis muscle and just below the 12th rib Colicky pain d/t hyperperistalsis of smooth muscles of calyces, pelvis and ureter as it attempts to rid itself of the foreign body or to overcome the obstruction the colicky pain radiates along the course of the ureter, from the costoveebral angle down towards the lower anterior abdominal quadrant. the ureteric colick pain is referred to different sites depending on the site of obstruction of the calculus. Ref : Smith's Urology 16/e, p 32, 264
Stretching of renal capsule due to back pressure
Increased peristalsis of ureter to overcome the obstruction
Irriation of intramural ureter
Extravasation of urine
Urology