Harder stone with less satisfactory result in ESWL is
Correct Answer: Cystine stones
Description: Ans. (d) Cystine StonesRef Bailey and Love 27th Edition, Page 1408Extra Corporeal Shock Wave Lithotripsy:* Shock waves generated and focused on the stones.* Methods of Shock Wave Generation:# Spark Gap# Electromagnetic# Piezo Electric# Micro Expulsive* Cardiac arrhythmias can happen in cases of Spark Gap generated waves* ESWL is indicated for stones upto 1.5cm in kidney* Prophylactic antibiotics are advised.* Relatively resistant stone is CYSTINE due to its hardness.* Contraindications: Pregnancy and Oral Anticoagulant drug consuming patients* Steinstrasse - Stone street is collection of stone fragments in distal ureter after breaking by ESWL.
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