▁the ▁remaining ▁pieces ▁are ▁collected ▁in ▁a ▁" b asket " ▁and / or ▁was hed ▁out ▁of ▁the ▁ur inary ▁tract , ▁along ▁with ▁the ▁fin er ▁partic ulate ▁" d ust ." ▁ ▁The ▁procedure ▁is ▁done ▁under ▁either ▁local ▁or ▁general ▁an est hes ia ▁and ▁is ▁considered ▁a ▁minim ally - in vas ive ▁procedure . ▁It ▁is ▁widely ▁available ▁in ▁most ▁hosp it als ▁in ▁the ▁world . ▁ ▁Com parison ▁ ▁Las er ▁l ith ot ri ps y ▁( LL ) ▁has ▁been ▁evaluated ▁against ▁Ext rac orp ore al ▁Sho ck ▁W ave ▁l ith ot ri ps y ▁( ES W L ), ▁finding ▁both ▁to ▁be ▁safe ▁and ▁effective . ▁ ▁ES W L ▁may ▁be ▁sa fer ▁for ▁small ▁stones ▁( < 1 0   mm ), ▁but ▁less ▁effective ▁for ▁ 1 0 – 2 0   mm ▁stones . ▁ ▁A ▁ 2 0 1 3 ▁meta - analysis ▁found ▁LL ▁can ▁treat ▁larger ▁stones ▁( > ▁ 2   cm ) ▁with ▁good ▁stone - free ▁and ▁comp lication ▁rates . ▁ ▁Hol m ium ▁las er ▁l ith ot ri ps y ▁had ▁superior ▁initial ▁success ▁and ▁re - tre at ment ▁rate ▁compared ▁to ▁ext rac orp ore al ▁shock ▁wave ▁l ith ot ri ps y ▁( ES W L ) ▁in ▁a ▁ 2 0 1 3 ▁trial . ▁ ▁The ▁experimental ▁th ul ium ▁fi ber ▁las er ▁( TF L ) ▁is ▁being