URSL: Clearing Ureteric Stones With a Scope and Laser

If a stone has moved out of the kidney and lodged in the ureter — the tube carrying urine to the bladder — URSL is often the fastest way to clear it. Here's how ureteroscopy with laser lithotripsy works, and why it's such a popular first-line option.

What Is URSL?

Ureterorenoscopy with Laser Lithotripsy — commonly shortened to URSL or URS — is a minimally invasive procedure used to treat stones lodged in the ureter, the narrow muscular tube that carries urine from the kidney to the bladder. A thin, rigid or semi-rigid ureteroscope is passed through the urethra and bladder directly into the ureter, allowing the surgeon to see the stone and fragment it in place using a holmium laser fiber threaded through the scope. Because it involves no external incision at all, URSL is one of the most commonly performed stone procedures for mid- and lower-ureter stones.

When Is URSL the Right Choice?

• Stones located in the ureter (rather than deep within the kidney)
• Stones causing significant pain or blocking urine flow
• Cases where ESWL has been ineffective or isn't well suited to the stone's location
• Situations requiring immediate relief of an obstructed, infected kidney

How the Procedure Works

Performed under general or spinal anesthesia, URSL begins with the surgeon passing the ureteroscope through the natural urinary passage — no cuts, no punctures. Once the stone is visualized, the holmium laser breaks it into small fragments or fine dust, which either passes naturally or is retrieved with a tiny basket. The whole procedure typically takes 30 to 60 minutes depending on stone size and location. A temporary ureteral stent is usually placed afterward to prevent swelling from blocking urine flow while the ureter heals.

Recovery After URSL

• Same day or overnight stay: Most patients go home within 24 hours of the procedure.
• Stent discomfort: Mild urgency, frequency, or blood-tinged urine while the stent is in place is common and temporary.
• Stent removal: Usually done in a quick outpatient visit 1–2 weeks later.
• Follow-up imaging: Confirms the ureter is clear and healing well.

Advantages of URSL

Because it requires no incision, URSL typically involves a shorter recovery than PCNL and a higher single-session success rate than ESWL for stones already sitting in the ureter. Complication rates are low, and most patients return to normal activity within a few days to a week.

The Takeaway

For a stone that's made its way into the ureter and is causing pain or blockage, URSL offers a fast, scarless, and highly effective route to relief — often resolving the problem in a single same-day procedure.