Holmium laser kidney stone treatment is a minimally invasive technique used to break kidney or ureteral stones into smaller fragments during ureteroscopy.

The medical term commonly used is holmium:YAG laser lithotripsy, or Ho:YAG laser lithotripsy.

Instead of making a large incision to reach the stone, a thin ureteroscope can be passed through the natural urinary passage to reach stones in the ureter or kidney. The laser energy is then used to fragment the stone under direct vision.

Depending on the stone, the fragments may be removed with a basket or reduced into very small particles that can pass through the urinary tract.

Current European Association of Urology guidance recognizes Ho:YAG and thulium fiber laser as effective laser systems for flexible ureteroscopy.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist evaluation of kidney conditions and kidney-function concerns associated with urinary stones. When a stone requires endoscopic removal, appropriate urological coordination may be recommended.

Why Is a Laser Used to Break Kidney Stones?

Kidney stones vary considerably in size, hardness, location and composition.

A laser allows the treating specialist to directly target the stone and fragment it into smaller pieces.

The procedure can be useful when:

• A stone is unlikely to pass naturally

• The stone is causing significant symptoms

• There is persistent urinary obstruction

• A stone remains after another treatment

• The stone's location makes another treatment less suitable

• Active stone removal is clinically indicated

The choice of treatment is not based on the word “laser” alone. Stone size, location, density, anatomy, obstruction, infection and the patient's overall health all influence treatment selection.

How Does a Holmium Laser Break a Kidney Stone?

During laser lithotripsy, the laser fiber is positioned close to the stone through the working channel of the ureteroscope.

The energy is delivered in controlled pulses to fragment the stone.

The specialist may use different techniques depending on the stone:

Fragmentation

The stone is broken into larger pieces that can subsequently be retrieved with a basket.

Dusting

The stone is fragmented into very small particles so that much of the material can pass naturally afterward.

Combination Technique

Some procedures use both fragmentation and dusting depending on stone size and location.

The exact laser settings and technique are selected by the treating specialist according to the stone and procedure.

What Is RIRS With Holmium Laser?

When a flexible ureteroscope is used to reach a stone inside the kidney, the procedure is commonly called retrograde intrarenal surgery (RIRS).

The scope travels through:

Urethra → bladder → ureter → kidney

No external incision into the kidney is generally required for this retrograde approach.

Once the stone is visualized, the holmium laser can be used to fragment it.

Flexible ureteroscopy has become an established treatment option for renal stones, although the most appropriate procedure depends on individual stone characteristics.

What Is the Difference Between Ureteroscopy and RIRS?

The terms can sometimes be confusing.

Ureteroscopy (URS) refers broadly to using an endoscope to access and treat stones within the ureter and urinary tract.

RIRS generally refers to flexible ureteroscopy used to reach stones inside the kidney.

Both approaches may use a holmium laser to fragment stones.

The exact terminology used in a patient's medical report may therefore depend on the stone's location and the technique used.

Who May Need Holmium Laser Kidney Stone Treatment?

Laser treatment may be considered when active stone removal is recommended.

Possible situations include:

• A stone that is unlikely to pass naturally

• Persistent or recurrent renal colic

• A ureteral stone causing obstruction

• Recurrent bleeding associated with the stone

• Stone-related urinary problems

• Selected kidney stones that are unsuitable for observation

• Residual or recurrent stones requiring intervention

Not every kidney stone requires surgery.

Small stones without complications may sometimes be monitored or managed conservatively. Treatment decisions should be based on imaging, symptoms, kidney function and other clinical findings.

Is Holmium Laser Suitable for Large Kidney Stones?

It can be used for larger stones in selected patients, but stone size matters when choosing the procedure.

For very large renal stone burdens, percutaneous nephrolithotomy (PCNL) remains an important treatment option and is generally considered the standard procedure for large renal calculi.

Flexible ureteroscopy with laser can be considered when PCNL or shock wave lithotripsy is not appropriate, but larger stones may require staged procedures and a higher likelihood of additional treatment.

Therefore, a patient should not assume that laser treatment is automatically the appropriate choice simply because it is minimally invasive.

Can a 10 mm or 20 mm Stone Be Treated With a Holmium Laser?

Potentially, yes.

However, there is no single size cutoff at which laser treatment becomes suitable for everyone.

A stone measuring 10 mm in one location may be treated differently from a 10 mm stone in another location.

Similarly, a 20 mm renal stone may require a different strategy from a 20 mm ureteral stone.

The specialist may consider:

• Stone diameter

• Stone volume

• Stone location

• Lower-pole anatomy

• Stone density

• Number of stones

• Urinary obstruction

• Infection

• Kidney anatomy

• Previous procedures

For larger renal stones, PCNL may provide a more appropriate route to substantial stone clearance in many situations.

What Happens Before Holmium Laser Kidney Stone Surgery?

A proper pre-procedure evaluation helps determine whether laser treatment is appropriate.

The medical team may review:

Imaging

Ultrasound, X-ray or CT imaging may be used depending on the clinical situation.

Imaging helps determine:

• Stone size

• Stone location

• Number of stones

• Degree of obstruction

• Kidney anatomy

Urine Testing

A urine test or culture may be required to identify infection.

If a urinary infection is present, it generally needs appropriate treatment before definitive stone removal.

Blood Tests

Depending on the patient, testing may include:

• Creatinine

• eGFR

• Electrolytes

• Hemoglobin

• Other relevant blood tests

Medication Review

The treating team may review blood thinners, diabetes medicines, blood-pressure medicines and other medications before the procedure.

What Happens During Holmium Laser Kidney Stone Treatment?

The exact technique varies, but the procedure generally involves several stages.

Step 1: Anaesthesia

Ureteroscopy is commonly performed under anaesthesia.

Step 2: Scope Placement

A thin ureteroscope is introduced through the urinary passage and advanced toward the stone.

Step 3: Stone Visualization

The stone is located under direct endoscopic vision.

Step 4: Laser Fragmentation

A holmium laser fiber is used to break the stone into smaller fragments.

Step 5: Fragment Removal

Selected fragments may be removed using a small basket or other endoscopic equipment.

Step 6: Drainage Assessment

Depending on the procedure, stone burden and ureteral condition, a temporary stent may be placed.

Ureteroscopy allows doctors to visualize and treat stones in the ureters or kidneys without a conventional open incision.

What Is a Ureteral Stent and Why Might It Be Used?

A ureteral stent is a thin flexible tube placed inside the ureter.

It can help maintain urine drainage while swelling settles or while small fragments pass.

A stent may be considered depending on:

• Ureteral swelling

• Stone burden

• Procedure complexity

• Risk of temporary obstruction

• Need to support urinary drainage

Not every uncomplicated ureteroscopy requires a stent. Current EAU guidance recommends avoiding routine stenting in uncomplicated cases.

When a stent is used, it is generally temporary and should be removed or exchanged according to the treating specialist's instructions.

What Does a Kidney Stent Feel Like?

Some patients experience temporary symptoms while a stent is in place.

These may include:

• Frequent urination

• Urgency

• Burning while urinating

• Flank discomfort

• Bladder discomfort

• Mild blood in urine

The severity varies between patients.

A stent should not be ignored after the planned removal date. Patients should follow the scheduled stent-removal or exchange plan.

NIDDK notes that temporary ureteral stents can cause discomfort, urinary frequency and urgency while they remain in place.

How Long Does Holmium Laser Kidney Stone Treatment Take?

Procedure duration varies substantially.

A small, straightforward ureteral stone may be treated relatively quickly, while multiple or large kidney stones can require a longer procedure.

Factors affecting procedure time include:

• Number of stones

• Stone size

• Stone density

• Stone location

• Access to the kidney

• Need for basket extraction

• Complexity of the urinary anatomy

• Amount of stone fragmentation required

It is therefore not appropriate to promise a fixed operation time for every patient.

Can One Laser Procedure Completely Remove the Stone?

Sometimes, but not always.

A single procedure may achieve complete clearance for some stones.

However, larger stone burdens may require:

• A second ureteroscopy

• A staged laser procedure

• Another stone-removal technique

• Follow-up treatment for residual fragments

The likelihood of needing additional treatment increases with stone burden and complexity.

Current EAU guidance notes that flexible ureteroscopy can be used for stones larger than 2 cm when PCNL or SWL are not options, but additional procedures and stenting may be more likely.

Holmium Laser vs Shock Wave Lithotripsy

Both techniques can be used for selected kidney stones, but they work differently.

Holmium Laser

• Stone is reached directly with an endoscope

• Laser fragments the stone

• Selected fragments can be removed

• Useful for many ureteral and renal stones

• Requires an endoscopic procedure

Shock Wave Lithotripsy

• Shock waves are generated outside the body

• Energy is focused on the stone

• Stone fragments subsequently pass through the urinary tract

• No endoscope is inserted into the kidney for the fragmentation itself

The choice depends on stone size, location, composition, anatomy and patient-specific factors.

Holmium Laser vs PCNL

PCNL and laser ureteroscopy are not simply interchangeable procedures.

PCNL creates a small access tract directly into the kidney and is particularly important for larger renal stone burdens.

Flexible ureteroscopy with holmium laser reaches the kidney through the natural urinary tract.

For large or complex renal stones, PCNL may offer a more suitable approach to stone clearance. Flexible ureteroscopy may be selected in situations where PCNL is not appropriate or where the stone burden is suitable for endoscopic treatment.

Is Holmium Laser Kidney Stone Treatment Painful?

The procedure itself is performed under anaesthesia, so patients generally do not experience the procedure in the usual way.

Temporary discomfort may occur afterward.

Possible symptoms include:

• Mild flank discomfort

• Burning during urination

• Urinary urgency

• Blood in urine

• Stent-related discomfort

Pain severity varies and should be discussed with the treating team.

Severe or worsening pain after the procedure should not simply be assumed to be normal.

Recovery After Holmium Laser Stone Removal

Recovery depends on the number and size of stones, the procedure performed and whether a stent was placed.

Some patients can return home the same day after uncomplicated ureteroscopy.

Temporary symptoms may include urinary discomfort, frequency, urgency or mild hematuria.

Patients should follow the treating team's instructions regarding:

• Medicines

• Fluid intake

• Physical activity

• Antibiotics when prescribed

• Stent removal

• Follow-up imaging

NIDDK notes that ureteroscopy is commonly performed in a hospital setting under anaesthesia and that many patients can go home the same day.

What Are the Risks of Holmium Laser Lithotripsy?

Like any medical procedure, laser stone treatment has potential risks.

These may include:

• Urinary tract infection

• Bleeding

• Temporary urinary discomfort

• Ureteral irritation

• Ureteral injury

• Residual stone fragments

• Stent-related symptoms

• Need for another procedure

• Anaesthesia-related complications

Serious complications are less common but can occur.

EAU guidance reports an overall complication rate after ureteroscopy in the range of 4–25%, with most complications being minor; infectious complications including urosepsis are among the important concerns.

Why Is Infection Screening Important Before Laser Stone Treatment?

A urinary infection can make stone procedures more complicated.

Patients may undergo urine testing or culture before treatment when clinically appropriate.

If an obstructed urinary tract is infected, the immediate priority may be restoring urine drainage rather than performing definitive stone fragmentation.

Depending on the circumstances, drainage may involve a ureteral stent or nephrostomy, followed by definitive stone treatment after the infection has been controlled.

A patient with fever, chills, severe flank pain and known urinary obstruction needs urgent medical assessment.

What Happens to the Stone Fragments After Laser Treatment?

The fate of stone fragments depends on the technique.

Some fragments may be:

• Removed during the procedure

• Collected for laboratory analysis

• Reduced into very small particles

• Passed naturally afterward

Stone analysis can help identify the composition and may assist with prevention planning.

Depending on the patient's history, a doctor may also recommend metabolic evaluation or urine testing after stone treatment.

Can Holmium Laser Treatment Prevent Future Kidney Stones?

No.

Laser treatment removes or fragments the existing stone, but it does not automatically eliminate the reason why stones formed.

After treatment, prevention may involve:

• Adequate fluid intake when medically appropriate

• Reducing excessive dietary sodium

• Appropriate dietary adjustments

• Stone analysis

• Metabolic evaluation in selected patients

• Preventive medicines when indicated

• Treatment of recurrent urinary infections

• Follow-up with the treating specialist

The prevention plan should be individualized.

Is Holmium Laser Better Than Other Kidney Stone Treatments?

There is no single treatment that is best for every patient.

Holmium laser ureteroscopy is an established treatment option, but SWL, PCNL, observation or other approaches may be more suitable depending on the stone.

For example, large renal stones may be better suited to PCNL, while some smaller stones may be appropriate for observation or SWL.

Treatment selection should therefore be based on the patient's imaging and clinical condition rather than choosing a procedure solely because it uses a laser.

When Should You Seek Urgent Care After Laser Treatment?

Contact a healthcare professional urgently if you develop:

• Fever or chills

• Severe or worsening pain

• Very little or no urine

• Heavy bleeding or blood clots

• Persistent vomiting

• Severe weakness

• Confusion

• Rapid deterioration

NIDDK specifically advises prompt medical attention after ureteroscopy for symptoms such as inability to urinate, persistent painful urination, bright-red urine or clots, fever or chills, and severe discomfort.

Holmium Laser Kidney Stone Evaluation at Prabhakar Bhurke Clinic

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized evaluation for kidney stones and associated kidney-function problems.

Depending on the patient's condition, evaluation may include:

• Review of ultrasound or CT findings

• Assessment of kidney function

• Creatinine and eGFR testing

• Evaluation of urinary obstruction

• Assessment of urinary infection

• Review of recurrent stone history

• Prevention planning

• Coordination with an appropriate urological specialist when endoscopic stone removal is required

• Follow-up of kidney function after stone treatment

The appropriate stone-removal procedure depends on the stone's location, size, composition, obstruction status and overall patient health.

Frequently Asked Questions

What is holmium laser kidney stone treatment?

It is an endoscopic stone-removal technique in which a holmium:YAG laser is used to fragment kidney or ureteral stones during ureteroscopy.

Is holmium laser safe for kidney stones?

It is an established method of laser lithotripsy, but like every procedure it carries risks such as infection, bleeding, ureteral injury, residual fragments and stent-related symptoms. Suitability depends on the individual patient.

Can holmium laser remove a kidney stone completely?

It can achieve complete clearance in many cases, but larger or complex stones may require staged treatment or additional procedures.

Can a 20 mm kidney stone be treated with holmium laser?

It can be treated with flexible ureteroscopy and laser in selected circumstances, but PCNL is an important option for large renal stones and may be more appropriate depending on the stone burden and anatomy.

Does laser treatment require a stent?

Not always. A stent may be used when the treating specialist believes it is beneficial for drainage, ureteral swelling or stone-fragment passage. Uncomplicated ureteroscopy does not routinely require stenting.

How long does it take to recover from laser kidney stone treatment?

Recovery varies. Some uncomplicated ureteroscopies are outpatient procedures, while more complex stone treatments may require additional monitoring or staged procedures.

Can kidney stones come back after laser treatment?

Yes. Removing a stone does not eliminate the metabolic or dietary factors that caused it. Stone analysis and preventive evaluation can help reduce recurrence risk.

Conclusion

Holmium laser kidney stone treatment is an established minimally invasive approach for breaking and removing selected kidney and ureteral stones.

The procedure uses a ureteroscope to reach the stone and a Ho:YAG laser to fragment it. Depending on the stone, fragments may be extracted or reduced into smaller particles for natural passage.

However, laser treatment is not automatically appropriate for every stone. Stone size, location, density, anatomy, obstruction, infection and kidney function all influence the treatment plan. Large renal stones may require consideration of PCNL, while selected smaller stones may be managed with other approaches.

If you have been advised to undergo laser stone treatment, discuss the imaging findings and available procedures with your treating specialist. For kidney-function assessment and specialist kidney care, Prabhakar Bhurke Clinic provides evaluation under Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician.

Medical Disclaimer

This article is intended for general educational and informational purposes only and should not be considered a substitute for medical diagnosis, treatment or individualized medical advice. Holmium laser lithotripsy is not appropriate for every kidney or ureteral stone. The choice between ureteroscopy with laser, RIRS, shock wave lithotripsy, PCNL, observation or another approach depends on stone size, location, composition or density, urinary anatomy, obstruction, infection status, kidney function and overall health. Do not take medicines, antibiotics or supplements, or change fluid intake, based solely on this article. If you have a known stone with fever, chills, severe worsening pain, very little or no urine, persistent vomiting, heavy bleeding or rapidly worsening symptoms, seek urgent medical attention. Consult Dr. Sandip Prabhakar Bhurke or another qualified healthcare professional for an individualized treatment plan.