New Combination of Ultrasound Techniques Allows Removal and Breakup of Kidney Stones Without Anesthesia

A new study reveals that kidney stones can be moved, repositioned and broken while patients are awake using a simple ultrasound technique.

According to doctors at the University of Washington School of Medicine (UW Medicine), the technique combines the use of two ultrasound techniques to minimize pain and provide an option to remove kidney stones from the ureter without anesthesia.

In this procedure, doctors use handheld transducers placed on the skin to direct ultrasound waves at the stone.

Then, a process that uses ultrasound to move and reposition the stone to facilitate its passage (a process called ultrasonic propulsion) or using a technique called burst wave lithotripsy (BWL) to break up the stone. I can do it.

Unlike shock wave lithotripsy, which is the standard procedure in use today and requires sedation, the technique is harmless, said lead author Dr. M Kennedy Hall, an emergency physician at UW Medicine. .

“It’s almost painless and can be done with the patient awake and without sedation, which is very important,” Hall said.

The research team hopes that using this new technology, the movement or dissection of stones will eventually take place in a clinic or emergency room.

Ureteral stones, which lead from the kidneys to the bladder, can cause severe pain and are a common reason for emergency department visits.

Most patients with ureteral stones are advised to wait to see if the stone will pass on its own.

However, this observation period can last several weeks, and nearly a quarter of patients will eventually require surgery, Hall said.

Twenty-nine patients participated in the new study. Sixteen were treated with propulsion alone and 13 with propulsion and burst wave lithotripsy. Stones were displaced in 19 patients.

In two cases, stones migrated from the ureters into the bladder.

Burst wave lithotripsy fragmented the stone in seven cases. At 2-week follow-up, 18 of 21 patients (86%) with stones located in the lower ureter, close to the bladder, had passed stones.

In this group, the mean time to stone passage was approximately 4 days.

The study said one of these patients felt “immediate relief” once the stone was removed from the ureter.

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