Shock Wave Lithotripsy (SWL/ESWL)
Shock Wave Lithotripsy (SWL), also known as Extracorporeal Shock Wave Lithotripsy (ESWL), is a non-invasive treatment used to break kidney and ureter stones into smaller fragments. These fragments can then pass naturally through the urinary tract in the urine. The procedure uses precisely targeted shock waves guided by imaging such as ultrasound or X-ray.
How Does SWL Work?
Before treatment, the urologist evaluates the stone's size, location and other health factors to determine whether ESWL for kidney stones is appropriate. During the procedure, a lithotripsy machine directs controlled shock waves toward the stone, gradually breaking it into smaller pieces. Pain-relief medication or anesthesia may be used depending on the patient's needs.
Benefits of SWL
- Non-invasive approach to kidney stone treatment
- No surgical incision is required
- Breaks stones into fragments that can pass through urine
- Often performed as an outpatient or day-care procedure
- Recovery is generally quicker than more invasive stone-removal procedures
Recovery and Aftercare
Patients may experience mild discomfort or blood in the urine while stone fragments pass. Drinking adequate fluids, following prescribed medicines and attending follow-up appointments can help monitor stone clearance. Some patients may require more than one SWL session depending on stone characteristics and treatment response.