At a glance
Extracorporeal Shock Wave Lithotripsy (ESWL) is a non-surgical treatment that uses focused sound waves to break kidney stones or other urinary tract stones into small fragments so they can pass out of the body naturally in the urine.
A machine outside the body generates thousands of high-energy sound pulses and aims them precisely at the stone. Each pulse travels through skin and soft tissue without cutting anything, then strikes the stone and creates tiny stress fractures inside it. After repeated pulses the stone crumbles into sand-like pieces, which the kidneys flush down the ureter (the tube connecting the kidney to the bladder) and out through urination over the following days or weeks.
Medical Condition
ESWL is primarily used for stones in the kidney or upper ureter (the tube running from the kidney toward the bladder) that are causing pain, blocking urine flow, or threatening kidney function.
- Kidney stones (renal calculi) that are too large to pass on their own but still small enough for shock waves to break apart, generally up to about two centimetres in diameter.
- Stones in the upper ureter that have not moved despite observation or medication.
- Recurrent stone formation in patients who need repeated stone removal with minimal recovery time.
- Stones discovered incidentally that a urologist judges are likely to become symptomatic.
ESWL is not suitable for everyone. A urologist will advise against it in certain situations.
- Pregnancy, because shock waves carry an unknown risk to the developing baby.
- Uncontrolled bleeding disorders or patients on blood thinners that cannot be paused safely.
- A cardiac pacemaker (the shock waves can interfere with some devices).
- Very large or very hard stones, such as those made of cystine or calcium oxalate monohydrate, which often resist fragmentation.
- Severe obesity that prevents the machine from focusing shock waves accurately on the stone.
- Obstruction below the stone that would block fragments from passing even after treatment.
- Active urinary tract infection that has not yet been treated.
Risks & Complications
ESWL is generally well tolerated, but like any medical procedure it carries recognised risks that your urologist will discuss with you beforehand.
- Blood in the urine (haematuria) for a few days after treatment, which is very common and usually settles on its own.
- Pain or discomfort in the flank or abdomen as stone fragments pass through the ureter.
- Steinstrasse (literally 'stone street'), a blockage in the ureter caused by a column of stone fragments that accumulate and need further treatment.
- Incomplete stone fragmentation, meaning the stone does not break up enough and a second session or a different procedure is needed.
- Bruising or tenderness of the skin and tissue around the treatment area.
- Urinary tract infection triggered by bacteria released from the broken stone.
- In rare cases, injury to the kidney tissue itself causing temporary reduction in kidney function or bleeding around the kidney (perinephric haematoma).
- Damage to surrounding structures such as the bowel or blood vessels in rare cases when stone positioning makes targeting difficult.
Preparation & Procedure
Preparation usually begins a few days before the procedure. Blood thinners and certain anti-inflammatory medicines are typically paused beforehand because they increase the risk of bleeding; your urologist and anaesthesia team will give specific guidance on which medicines to hold and for how long.
Patients are usually asked to stop eating solid food for at least six hours before the session and to stop clear fluids for two to four hours before. Smoking and alcohol are best avoided in the days leading up to treatment because both can affect healing and anaesthesia response.
Several tests are commonly arranged before ESWL to confirm the stone's size, position, and composition, and to check that the kidneys and urinary tract can handle the procedure.
- Urine analysis and urine culture to rule out an active infection.
- Blood tests to check kidney function and clotting ability.
- Imaging, most often a CT scan without contrast dye (non-contrast CT), which gives the clearest picture of stone size and exact location. Plain X-ray (KUB) or ultrasound (USG) may also be used depending on stone type.
- An electrocardiogram (EKG) and possibly a chest X-ray if sedation or general anaesthesia is planned.
On the day of treatment the procedure itself follows a standard sequence, though the exact steps can vary between hospitals and equipment types.
- 1. The patient changes into a hospital gown and a small tube (intravenous line) is placed in the arm for fluids and any sedation medicine.
- 2. Pain relief or sedation is given. Depending on the hospital's practice and the patient's needs, this ranges from oral pain medicine alone to light sedation or, less commonly, general anaesthesia.
- 3. The patient lies on a padded table or a water-filled cushion that couples the shock waves to the body.
- 4. The urologist uses X-ray or ultrasound guidance in real time to locate the stone and align the shock wave generator directly over it.
- 5. The machine delivers hundreds to thousands of shock wave pulses over roughly thirty minutes to an hour. The patient may feel a tapping or stinging sensation if sedation is light.
- 6. Imaging is checked during or after the session to assess how well the stone has fragmented.
- 7. The patient moves to a recovery area for monitoring before discharge, usually the same day.
Aftercare
Most patients go home the same day as the procedure and notice improvement within days, but passing all stone fragments can take several weeks and requires some care in the meantime.
- Monitoring: Before discharge, staff check blood pressure, urine output, and pain control. If sedation or anaesthesia was used, the patient is observed until fully alert.
- Hydration: Drinking plenty of water in the days and weeks after treatment helps flush stone fragments through the urinary tract. The care team will advise on a suitable daily fluid target.
- Activity: Light activity is usually possible within one or two days. Strenuous exercise, heavy lifting, and activities that jar the body are typically restricted for at least a week.
- Straining urine: Patients are often asked to urinate through a fine filter or strainer so that stone fragments can be collected and sent for laboratory analysis to identify the stone type, which guides long-term prevention.
- Pain management: Mild to moderate flank pain or cramping as fragments pass is normal. Pain medicines prescribed or recommended by the care team manage most discomfort at home.
- Watching for warning signs: Fever, severe pain, inability to pass urine, or heavy bleeding need prompt medical attention and should not be managed at home without guidance.
- Follow-up imaging: A repeat CT scan, X-ray, or ultrasound is usually arranged at four to six weeks to confirm that fragments have cleared or to decide whether a second ESWL session or a different procedure is needed.
- Stone prevention: Dietary advice, increased fluid intake, and in some cases long-term medication are discussed at follow-up based on the stone analysis results.
Cost & What Determines It
The total cost of ESWL varies widely depending on where the procedure is done, the complexity of the case, and what the hospital package includes, which is why two patients with similar stones can end up with very different bills.
- Stone complexity: A single small stone in a straightforward position requires fewer shock wave pulses and shorter machine time than a large, dense, or awkwardly placed stone that may need multiple sessions.
- Hospital class and country: Private specialist hospitals and internationally accredited centres charge more than general hospitals; costs also differ significantly across countries popular for medical travel.
- Type and generation of lithotripsy machine: Newer equipment that combines imaging guidance with higher-precision shock wave delivery tends to cost more to operate.
- Anaesthesia or sedation: ESWL done under general anaesthesia or deep sedation adds anaesthesiologist fees and recovery room time compared to cases managed with light sedation or oral pain medicine.
- Pre-procedure tests: The scope of imaging (non-contrast CT versus plain X-ray), blood panels, urine culture, and EKG all contribute to the overall bill.
- Length of stay: Same-day discharge is standard for uncomplicated ESWL, but an overnight stay for pain control or monitoring adds room and nursing fees.
- Post-procedure follow-up: The number of imaging checks, outpatient consultations, and laboratory tests for stone analysis after treatment vary and are not always bundled into the initial price.
- Additional procedures: If ESWL does not fully clear the stone and a ureteroscopy (a camera procedure to retrieve fragments) or stent placement is needed, those costs are separate.
Hospital packages for ESWL often include the procedure itself, machine time, the attending urologist's fee, basic nursing care, and standard pre-procedure blood tests. Items that are frequently billed separately include the anaesthesiologist's fee, advanced imaging such as a CT scan, post-procedure medications to take home, stone analysis in the laboratory, and outpatient follow-up consultations.
BPJS Kesehatan and most Indonesian private insurance policies do not cover treatment received abroad, so patients travelling overseas for ESWL generally pay the full cost themselves or rely on international private health insurance that explicitly covers medical travel. Requesting a detailed written cost estimate from the hospital before booking travel is the most reliable way to understand the total expected expense and avoid unexpected charges on arrival.
Frequently Asked Questions
How many sessions of ESWL will I need?
Most people need one to three sessions, but your doctor will decide based on the size, location, and hardness of your kidney stone. Smaller, softer stones often break up in a single session, while larger or denser stones may need repeat treatments spaced a few weeks apart. Your urologist will check with imaging after each session to see how well the stone has broken down.
What does ESWL feel like, and is it painful?
During ESWL, most patients feel a repeated tapping or mild stinging sensation on the skin where the sound waves enter the body. The procedure is usually done with sedation or pain relief medication to keep you comfortable, though some people find it more uncomfortable than others. After the session, you may feel soreness in your back or side, and passing stone fragments in your urine over the following days can cause a brief, sharp pain.
How soon will ESWL start working, and what should I avoid during treatment?
The shock waves break the stone during the session itself, but your body then passes the fragments through your urine over days to a few weeks, so results are gradual rather than immediate. Your doctor will usually advise you to drink plenty of water to help flush the fragments out. During this period, most patients are told to avoid strenuous physical activity and to watch for warning signs such as fever, severe pain, or blood in the urine, which should prompt a call to your care team.
How much does ESWL cost?
The cost of ESWL depends on several factors specific to your situation, including the number of sessions needed, the size and position of the stone, the class of hospital you choose, and whether imaging or follow-up consultations are included in the package. Because these factors vary from patient to patient, there is no single fixed price. Requesting a written estimate directly from the hospital is the most reliable way to understand what you will pay.
This page is general information, not a substitute for medical advice. Every case is different. Your doctor decides what is right for you.
