Indian Journal of Urology
: 2015  |  Volume : 31  |  Issue : 1  |  Page : 28--32

Focused ultrasound guided relocation of kidney stones

Nitin Abrol, Nitin S Kekre 
 Department of Urology, Christian Medical College, Vellore, India

Correspondence Address:
Dr. Nitin Abrol
Department of Urology, Christian Medical College Hospital, Vellore, Tamil Nadu

Purpose: Complete removal of all fragments is the goal of any intervention for urinary stones. This is more important in lower pole stones where gravity and spatial orientation of lower pole infundibulum may hinder spontaneous passage of fragments. Various adjuvant therapies (inversion, diuresis, percussion, oral citrate, etc.) are described to enhance stone-free rate but are not widely accepted. Focused ultrasound-guided relocation of fragments is a recently described technique aimed at improving results of intervention for stone disease. Purpose of this review is to discuss development of this technology and its potential clinical applications. Materials and Methods: Pubmed search was made using key words źDQ╗Focused ultrasoundźDQ╗ and źDQ╗kidney stone.źDQ╗ All English language articles were reviewed by title. Relevant studies describing development and application of focused ultrasound in renal stones were selected for review. Results: Focused ultrasound has proven its efficacy in successfully relocating up to 8 mm stone fragments in vitro and in pigs. Relocation is independent of stone composition. The latest model allows imaging and therapy with a single handheld probe facilitating its use by single operator. The acoustic energy delivered by the new prototype is even less than that used for extracorporeal shock wave lithotripsy. Therapeutic exposure has not caused thermal injury in pig kidneys. Conclusion: Focused ultrasound-guided relocation of stones is feasible. Though it is safe in application in pigs, technology is awaiting approval for clinical testing in human beings. This technology has many potential clinical applications in the management of stone disease.

How to cite this article:
Abrol N, Kekre NS. Focused ultrasound guided relocation of kidney stones.Indian J Urol 2015;31:28-32

How to cite this URL:
Abrol N, Kekre NS. Focused ultrasound guided relocation of kidney stones. Indian J Urol [serial online] 2015 [cited 2021 Sep 17 ];31:28-32
Available from:;year=2015;volume=31;issue=1;spage=28;epage=32;aulast=Abrol;type=0