Lithotripsy Kidney Stones: Treatment Guide for Canada

Lithotripsy kidney stones treatment is one of the most widely used procedures in Canada for breaking up painful kidney stones so your body can pass them naturally. If you or someone you know has been diagnosed with kidney stones, understanding how lithotripsy works can help you feel more confident about the next steps in your care. As always, consult your family doctor or urologist before making any health care decisions.

How Lithotripsy Kidney Stones Treatment Works in Canada

Kidney stone treatment in Canada has advanced significantly, and extracorporeal shock wave lithotripsy (ESWL) remains a preferred non-invasive option offered at hospitals and clinics across the country. Kidney stones form when minerals in your urine crystallise and clump together, ranging from the size of a grain of sand to a small pebble. While many small stones pass on their own, larger stones often require medical intervention — and lithotripsy is frequently the first-line solution recommended by Canadian specialists.

What Is Lithotripsy?

Kidney Stone Treatment Options Including Lithotripsy for Kidney Stones in Canada

Treatment Option	How It Works	Key Benefits	Considerations
Shock Wave Lithotripsy (SWL)	High-energy sound waves break stones into smaller fragments that pass naturally through urine	Non-invasive, no incisions required, performed as outpatient procedure, widely available across Canadian hospitals	Most effective for stones under 2 cm; may require multiple sessions; not suitable for all stone locations
Ureteroscopy (URS)	A thin scope is passed through the urethra and bladder to reach and laser-fragment the stone	High success rate for ureteral and small kidney stones, direct stone removal possible	Requires general or spinal anesthesia; temporary ureteral stent often placed post-procedure
Percutaneous Nephrolithotomy (PCNL)	A small incision in the back allows direct access to remove large or complex kidney stones	Most effective for large stones (over 2 cm) or staghorn calculi; high clearance rates	Invasive procedure; typically requires a short hospital stay of 2–3 days; longer recovery time
Medical Expulsive Therapy	Medications such as alpha-blockers relax the ureter to help small stones pass naturally	Non-invasive, no procedure required, manageable at home with physician guidance	Only effective for stones smaller than 5–6 mm; may take days to weeks; pain management needed
Conservative Watchful Waiting	Increased fluid intake and monitoring for spontaneous stone passage without active intervention	No medical intervention required, suitable for asymptomatic or very small stones under 4 mm	Not appropriate if infection, severe pain, or kidney obstruction is present; requires follow-up imaging

Lithotripsy is a procedure that uses energy — often in the form of shock waves — to break kidney stones into tiny fragments. These small pieces can then pass out of your body through your urine. The procedure can also treat stones in the gallbladder or other parts of the urinary tract.

Kidney stones form when minerals and other substances in your urine crystallise and clump together. They can range from the size of a grain of sand to a small pebble. For more background on kidney stones, visit the Mayo Clinic’s guide to kidney stones.

Most small stones — generally under 5 mm — can pass through your urinary system on their own. However, larger stones can get stuck in your ureters or bladder. This causes painful blockages, infections, and sometimes serious kidney damage. Lithotripsy is often the best solution in these cases.

How Kidney Stones Affect Your Body

Your kidneys filter waste from your blood and send it out of your body as urine. Kidney stones travel from the kidneys, through the ureters, and into the bladder before leaving the body. When a stone gets stuck along this path, it causes intense pain.

Stones larger than 1.5 cm are very likely to cause a blockage. A blocked urinary tract can lead to a condition called hydronephrosis, where the kidney swells due to a build-up of urine. This can cause permanent kidney damage if left untreated.

Anyone with kidney stones that cause a blockage, serious infection, or bleeding may need lithotripsy. Your family doctor or urologist will help decide if this treatment is right for you.

Types of Lithotripsy

There are two main categories of lithotripsy: extracorporeal (outside the body) and intracorporeal (inside the body). Each type suits different stone sizes, locations, and compositions. Your specialist will recommend the best option based on your specific situation.

Extracorporeal Shock Wave Lithotripsy (ESWL)

ESWL is the most common and least invasive type of lithotripsy. It uses shock waves generated outside your body to break up stones inside your kidneys or upper urinary tract. Because there is no incision, most people go home the same day.

During ESWL, you lie in a water bath or on a cushion while shock waves pass through your skin. X-rays help the medical team aim the waves at exactly the right spot. The procedure usually takes about one hour. Kidney stones are fragile enough that the shock waves break them into small pieces, which you then pass through your urine over the following days or weeks.

Intracorporeal Lithotripsy

Intracorporeal lithotripsy involves placing a small instrument inside your body to reach the stone directly. A tiny camera called a fibre-optic scope helps the doctor see the stone clearly. Energy is then applied to break the stone apart. There are several sub-types of intracorporeal lithotripsy.

• Ultrasonic lithotripsy: Uses high-frequency sound waves, often through a percutaneous (through the skin) approach. It works well for stones in the kidney.
• Electrohydraulic lithotripsy: Uses electrical charges to generate shock waves that break the stone. However, it may struggle with very hard stones, such as calcium oxalate stones.
• Mechanical lithotripsy: Uses a mechanical device to crush the stone. It is especially useful for large, hard stones.
• Laser lithotripsy: Uses a laser beam to break up stones. It works for most types of kidney stones, except cystine stones. Laser lithotripsy is increasingly common and very precise.

Percutaneous Lithotripsy

Percutaneous lithotripsy is used for very large or complex stones. The surgeon makes a small incision in your back and inserts a thin telescopic tube directly into your kidney. Ultrasonic waves break the stone into fragments, which are then removed through the same tube. This approach requires a short hospital stay.

How to Prepare for Lithotripsy

Preparation is an important part of making sure your procedure goes smoothly. Your doctor will review your full medical history and list of current medications. This step is essential and should not be skipped.

Some medications can affect how well your blood clots. For example, ibuprofen, aspirin, and blood thinners like warfarin can increase your risk of bleeding during the procedure. Your doctor will tell you exactly when to stop taking these medications before your appointment.

You may also need some pre-procedure imaging, such as an X-ray or ultrasound. These images help your medical team locate the stone precisely. In addition, your doctor may ask you to avoid eating or drinking for several hours before the procedure, especially if general anaesthesia is planned.

For general guidance on preparing for outpatient procedures, Health Canada provides trusted health information for Canadians.

What to Expect During and After Lithotripsy

During the Procedure

Lithotripsy is typically an outpatient procedure. This means you arrive, have the treatment, and go home the same day — no overnight hospital stay is required in most cases. The entire process usually takes about one to two hours.

Depending on the type of lithotripsy and your comfort level, you may receive local anaesthesia, sedation, or general anaesthesia. Local anaesthesia numbs the area to reduce discomfort. General anaesthesia puts you fully to sleep. Your doctor will decide which option is safest and most appropriate for you.

During ESWL, you will be positioned in a water bath or on a special cushion. Shock waves are directed at the stone through the water or cushion. Your body and water have similar acoustic properties, so the shock waves travel through your tissue without causing damage — they only affect the stone.

After the Procedure

After lithotripsy, you will rest under medical observation for approximately two hours. Once the medical team confirms you are stable, you are free to go home. It is a good idea to arrange for someone to drive you, especially if you received sedation or general anaesthesia.

Over the next few days, stone fragments will pass through your urine. Some people feel mild discomfort or cramping as the fragments move through the ureters. Others pass the fragments without feeling anything at all. In some cases, you may hear the fragments when they hit the toilet bowl — this is completely normal and confirms that the treatment is working.

Your doctor may ask you to strain your urine to collect stone fragments for analysis. Drinking plenty of water helps flush the fragments out. Healthline’s overview of kidney stones offers helpful tips on recovery and prevention.

Risks and Complications of Lithotripsy

Like any medical procedure, lithotripsy carries some risks. Most people tolerate it well, but it is important to understand what can happen. Your doctor will discuss these risks with you before you consent to treatment.

Possible risks include:

• Bleeding: Some people experience bleeding around the kidney after the procedure. In rare cases, a blood transfusion may be needed.
• Stone fragments blocking the ureter: A larger fragment may get stuck in the ureter, causing a blockage. This condition is called steinstrasse (German for “stone street”). It may require another procedure to remove the blockage.
• Infection: Breaking up a stone can sometimes release bacteria, leading to a urinary tract infection.
• Incomplete stone removal: Not all stones break up completely with one session. A second treatment may be needed.
• Kidney bruising: The shock waves can sometimes bruise the kidney tissue, though this usually heals on its own.
• Hydronephrosis: If a stone fragment blocks urine flow, the kidney can swell. This needs prompt medical attention.

Furthermore, electrohydraulic lithotripsy may have a lower success rate with very hard stones, such as calcium oxalate stones. Your specialist will choose the method most likely to work for your specific stone type.

When to See a Doctor

If you suspect you have a kidney stone, do not wait. Contact your family doctor as soon as possible. Symptoms of kidney stones include sharp pain in your back or side, pain when urinating, blood in your urine, nausea, and fever. Fever combined with kidney stone symptoms is a medical emergency — go to your nearest emergency room or call 911 immediately.

If you do not have a family doctor, visit a walk-in clinic. Most provincial health plans across Canada cover the assessment and treatment of kidney stones, including lithotripsy when medically necessary. Ask your doctor or clinic about your coverage under your provincial health plan.

After lithotripsy, contact your doctor right away if you experience heavy bleeding, a high fever, severe pain, or you are unable to urinate. These could be signs of a complication that needs immediate care.

Frequently Asked Questions About Lithotripsy

Key Takeaways

• Lithotripsy is a safe, effective procedure used to break up kidney stones so they can pass naturally through your urine.
• The most common type is extracorporeal shock wave lithotripsy (ESWL), which is non-invasive and done as an outpatient procedure.
• Other types — including laser, ultrasonic, and electrohydraulic lithotripsy — are used depending on the size, location, and hardness of the stone.
• Preparation includes stopping certain medications, such as blood thinners and anti-inflammatories, before the procedure.
• Most people go home the same day and pass stone fragments over the following days or weeks.
• Risks include bleeding, infection, and stone fragments blocking the ureter, but serious complications are uncommon.
• If you have symptoms of kidney stones, speak with your family doctor or visit a walk-in clinic. Most provincial health plans in Canada cover this treatment when medically necessary.
• Always consult a qualified healthcare provider before making any decisions about your treatment.