PCNL, or percutaneous nephrolithotomy, is a minimally invasive procedure used to remove kidney stones through a small opening made in the patient's back.

Instead of waiting for a large stone to pass naturally, the surgeon creates a controlled pathway directly into the kidney. A specialized instrument called a nephroscope is then used to locate and remove the stone or break it into smaller pieces.

PCNL is particularly useful when a kidney stone is large, complex, difficult to treat with other methods, or unlikely to pass naturally.

The exact procedure depends on the stone's size, location, number, density, kidney anatomy, urinary drainage and the patient's overall health.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist evaluation of kidney function and kidney-stone-related problems and can coordinate appropriate treatment with the relevant surgical or urological team when a procedure is required.

Why Might Someone Need PCNL?

Kidney stones vary greatly in size and location.

Small stones may sometimes pass through the urinary tract without an operation. Larger stones, however, can become lodged, obstruct urine flow, cause significant pain or contribute to infection and kidney-function problems.

PCNL may be considered when:

• The stone burden is large.

• There are multiple or complex renal stones.

• A stone is unlikely to pass naturally.

• Other stone-removal approaches are unlikely to provide adequate clearance.

• The stone is causing significant obstruction or symptoms.

• Previous treatment has not adequately cleared the stone.

• A complex stone pattern requires direct access to the kidney.

The decision is individualized rather than based on stone size alone.

Which Kidney Stones Are Commonly Treated With PCNL?

PCNL is particularly relevant to larger renal stone burdens.

It may be considered for:

Large Kidney Stones

Larger stones are less likely to pass naturally and may require active removal.

Complex or Multiple Stones

When several stones occupy different parts of the kidney, direct access can sometimes allow substantial stone clearance.

Staghorn Stones

Staghorn calculi can occupy a large portion of the renal collecting system and often require a planned surgical approach.

Stones Associated With Obstruction

If a stone is interfering with urine drainage, treatment may be necessary to protect kidney function.

Stones Not Successfully Treated With Previous Procedures

Some patients may require PCNL after another treatment has failed to provide adequate clearance.

The final choice depends on imaging and specialist assessment.

How Is a Patient Evaluated Before PCNL?

Before deciding on PCNL, the treating team needs to understand both the stone and the patient's medical condition.

Evaluation may include:

Imaging

Ultrasound, CT or other imaging may be used to determine:

• Stone size

• Stone location

• Number of stones

• Stone distribution

• Kidney anatomy

• Urinary obstruction

• Surrounding anatomical structures

A CT scan may provide detailed information that helps with procedure planning.

Blood Tests

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

• Serum creatinine

• eGFR

• Hemoglobin

• Electrolytes

• Blood glucose

• Other preoperative investigations

Urine Testing

Urine testing may be used to identify:

• Blood

• Protein

• Infection

• Other abnormalities

A urinary infection is particularly important to identify before definitive stone removal because an infected obstructed urinary system can become a serious medical problem.

Medication Review

The medical team may review medicines that could affect bleeding, anesthesia, kidney function or recovery.

Patients should provide a complete list of prescription medicines, over-the-counter drugs and supplements.

What Happens During PCNL Kidney Surgery?

The exact technique varies according to the stone and the surgeon's approach.

In general, the procedure involves several stages.

Step 1: Anesthesia

PCNL is generally performed in a hospital under anesthesia.

Step 2: Access to the Kidney

A small access tract is created through the skin of the back into the kidney.

Step 3: Nephroscope Placement

A nephroscope is introduced through the access tract so the surgeon can visualize the stone.

Step 4: Stone Fragmentation

If the stone is too large to remove as one piece, specialized energy devices, including laser or other stone-fragmentation technology, may be used to break it into smaller pieces.

Step 5: Stone Removal

The fragments are removed through the access tract using appropriate instruments.

Step 6: Drainage and Completion

Depending on the procedure and clinical situation, the surgeon may leave a nephrostomy tube or ureteral stent temporarily to support urine drainage.

The specific technique is selected according to the stone burden and patient anatomy.

Is PCNL a Major Surgery?

PCNL is considered a minimally invasive surgical procedure, but it is still an operation requiring anesthesia and careful preoperative planning.

Unlike open stone surgery, PCNL does not require a large surgical incision.

A small tract is created through the skin to reach the kidney directly.

Although recovery is generally less extensive than with traditional open surgery, PCNL can still involve bleeding, infection, residual stone fragments or other complications.

Therefore, the procedure should be performed by an appropriately trained specialist in a suitable medical setting.

How Long Does PCNL Kidney Surgery Take?

The duration can vary considerably.

Factors that influence procedure time include:

• Number of stones

• Stone size

• Stone location

• Stone density

• Kidney anatomy

• Number of access tracts required

• Previous kidney procedures

• Whether the procedure is staged

A straightforward stone may require less operative time than a large or complex stone burden.

Patients should therefore avoid relying on a fixed procedure duration without discussing their individual imaging and treatment plan with the treating team.

What Happens After PCNL?

After the procedure, the medical team monitors the patient for:

• Pain

• Bleeding

• Urine output

• Fever

• Blood pressure

• Kidney function

• Signs of infection

• Drainage from any temporary tube

Some patients can leave the hospital relatively soon, while others may require a longer stay depending on the complexity of the procedure and their recovery.

NIDDK notes that PCNL is performed in hospital with anesthesia and that some patients may stay in hospital for several days afterward.

PCNL Recovery: What Should Patients Expect?

Recovery differs between patients.

Temporary symptoms may include:

• Mild discomfort around the access site

• Blood-tinged urine

• Tiredness

• Urinary discomfort

• Flank soreness

• Temporary discomfort from a ureteral stent, if one is placed

The treating team will provide instructions regarding medicines, wound care, activity, fluids and follow-up.

Do not return to strenuous physical activity until your treating doctor confirms that it is appropriate.

Can a Stent Be Needed After PCNL?

Yes, in selected cases.

A ureteral stent is a thin tube placed inside the ureter to help urine move from the kidney to the bladder.

A stent may be used when the doctor wants to:

• Support urine drainage

• Allow swelling to settle

• Facilitate passage of residual fragments

• Protect drainage after the procedure

• Manage temporary ureteral obstruction

A stent is usually temporary and should be removed or exchanged according to the planned schedule.

What Are the Risks of PCNL Kidney Surgery?

PCNL is an established treatment for kidney stones, but no procedure is completely risk-free.

Potential complications can include:

• Bleeding

• Infection

• Fever

• Injury to surrounding structures

• Urinary leakage

• Residual stone fragments

• Need for another procedure

• Temporary urinary drainage problems

• Anesthesia-related complications

The actual risk depends on factors such as stone complexity, kidney anatomy, previous operations, infection status and the patient's general health.

The treating surgeon should explain procedure-specific risks before surgery.

Can PCNL Cause Kidney Damage?

PCNL is performed to remove stones and preserve the urinary system, but any procedure involving the kidney carries potential risks.

Patients with pre-existing kidney disease require careful assessment before treatment.

Kidney function may be monitored before and after surgery using appropriate blood tests.

A nephrologist may be involved when the patient has:

• Chronic kidney disease

• Reduced eGFR

• Significant proteinuria

• Electrolyte abnormalities

• Diabetes

• Difficult-to-control hypertension

• Previous acute kidney injury

• A solitary functioning kidney

What If There Is an Infection Before PCNL?

An active urinary infection can significantly change the treatment plan.

If a stone is blocking urine flow and infection is present, the priority may be to establish drainage and control the infection before definitive stone removal.

This can involve procedures such as a ureteral stent or nephrostomy in appropriate cases.

Definitive stone removal may then be performed after the infection has been appropriately managed.

Patients with fever, chills, severe flank pain, vomiting or reduced urine output should seek prompt medical assessment.

PCNL vs Laser Ureteroscopy

PCNL and flexible ureteroscopy with laser lithotripsy are different approaches to kidney stone removal.

PCNL

• Direct access through the skin into the kidney

• Particularly useful for larger or complex renal stones

• Allows substantial stone material to be removed directly

• Requires an access tract into the kidney

Flexible Ureteroscopy With Laser

• Uses the natural urinary passage

• A flexible scope travels through the urinary tract to the kidney

• Laser can fragment the stone

• May be appropriate for selected stones

• Larger stone burdens may require staged treatment

Neither procedure is automatically best for every patient.

The choice depends on stone size, location, anatomy, density, infection status, previous treatment and overall health.

PCNL vs ESWL

ESWL, or shock wave lithotripsy, breaks stones using externally generated shock waves.

PCNL physically accesses the kidney through a small tract and allows the surgeon to remove or fragment the stone directly.

ESWL may be suitable for selected stones, while PCNL is often considered when the stone burden is larger or less suitable for shock-wave treatment.

The final choice depends on the individual stone and patient factors.

NIDDK lists shock wave lithotripsy, ureteroscopy and PCNL among established approaches for kidney stone removal.

Can PCNL Remove All Kidney Stones in One Procedure?

Sometimes, but not always.

Stone clearance depends on:

• Total stone burden

• Number of stones

• Location within the kidney

• Stone density

• Kidney anatomy

• Surgical access

• Infection

• Previous procedures

A large or complex stone burden may require a staged procedure or an additional treatment.

The objective is safe and effective clearance rather than assuming that every stone must be removed in a single session.

What Happens to the Stone After PCNL?

Stone fragments may be collected during the procedure and sent for laboratory analysis.

Knowing the stone composition can be useful because different types of stones have different risk factors.

After stone removal, selected patients may also undergo metabolic evaluation, which can include urine testing to assess factors associated with future stone formation.

This is important because removing a stone does not necessarily eliminate the reason why it formed.

How Can Kidney Stones Be Prevented After PCNL?

Prevention should be individualized.

Depending on the stone type and metabolic findings, recommendations may involve:

• Appropriate fluid intake

• Reducing excessive sodium

• Maintaining an appropriate dietary pattern

• Reviewing animal-protein intake when relevant

• Maintaining appropriate dietary calcium

• Treating recurrent urinary infections

• Using prescribed preventive medicines when indicated

• Completing metabolic evaluation when recommended

NIDDK notes that stone prevention may involve adequate fluid intake, dietary changes and medicines depending on the cause of stone formation.

Patients with CKD, heart disease or fluid restrictions should follow their individualized fluid plan rather than automatically increasing water intake.

Can PCNL Be Avoided?

Sometimes another treatment may be more appropriate.

Depending on the stone, options can include:

• Observation

• Medical management

• ESWL

• Flexible ureteroscopy

• RIRS

• Staged endoscopic treatment

However, a large obstructing stone, recurrent infection or significant kidney-function problem may require active intervention.

The decision should be based on imaging and specialist assessment rather than fear of surgery alone.

When Is Kidney Stone Surgery Urgent?

A kidney stone needs prompt medical attention when it is associated with complications such as:

• Fever or chills

• Infection

• Significant urinary obstruction

• Very low or absent urine output

• Severe uncontrolled pain

• Persistent vomiting

• Worsening kidney function

• A solitary functioning kidney with obstruction

A blocked urinary system with infection can become a serious emergency.

Kidney stones can cause obstruction, infection and, in some circumstances, loss of kidney function if complications are not appropriately treated.

Kidney Stone and PCNL Evaluation at Prabhakar Bhurke Clinic

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist assessment for patients with kidney disease, abnormal kidney function and kidney-stone-related concerns.

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

• Review of ultrasound or CT reports

• Kidney-function assessment

• Creatinine and eGFR evaluation

• Assessment of urinary obstruction

• Urine infection evaluation

• Review of recurrent stone history

• Assessment of medical conditions affecting treatment

• Preoperative kidney-risk assessment

• Post-procedure kidney-function monitoring

• Coordination with an appropriate urological or surgical specialist for stone removal when required

The appropriate treatment depends on the patient's stone characteristics and overall medical condition.

Frequently Asked Questions

What is PCNL kidney surgery?

PCNL, or percutaneous nephrolithotomy, is a minimally invasive procedure in which a small access tract is created through the back into the kidney so a nephroscope can be used to locate, fragment and remove kidney stones.

Is PCNL used for large kidney stones?

Yes. PCNL is commonly considered when kidney stones are large or complex and require direct removal rather than relying on natural passage.

Is PCNL better than laser treatment?

Not necessarily. PCNL and flexible ureteroscopy with laser are different procedures. The most suitable option depends on stone size, location, anatomy, density and other patient factors.

How many days does it take to recover from PCNL?

Recovery varies according to the complexity of the procedure and the patient's health. Some patients may need a short hospital stay, while more complex cases may require longer monitoring.

Is PCNL painful?

The procedure itself is performed under anesthesia. Some discomfort can occur afterward around the kidney access site or from a temporary ureteral stent.

Can kidney stones come back after PCNL?

Yes. PCNL removes existing stones but does not necessarily eliminate the metabolic or dietary factors responsible for stone formation. Preventive evaluation can help reduce recurrence risk.

Can PCNL damage the kidney?

PCNL is designed to remove kidney stones while preserving kidney function, but complications are possible. Patients with pre-existing kidney disease require individualized assessment and monitoring.

Is PCNL a major operation?

PCNL is a minimally invasive operation rather than traditional open surgery. It still requires anesthesia, hospital-based care and careful monitoring.

What tests are needed before PCNL?

Depending on the patient, evaluation may include CT or ultrasound, kidney-function tests, blood counts, electrolytes, urine testing and assessment for urinary infection.

Conclusion

PCNL kidney surgery is an important minimally invasive option for removing larger and complex kidney stones. Instead of waiting for a substantial stone to pass through the urinary tract, the procedure creates a controlled pathway directly into the kidney so the stone can be fragmented and removed.

Whether PCNL is appropriate depends on the stone burden, location, anatomy, obstruction, infection status, kidney function and overall health. In some situations, flexible ureteroscopy, laser treatment or ESWL may be more suitable.

Proper evaluation before treatment is essential, particularly when there is infection, reduced kidney function, urinary obstruction or a solitary functioning kidney.

After stone removal, stone analysis and preventive evaluation may help reduce the chance of future stones.

For individualized kidney-function assessment and specialist care related to kidney stones, consult Dr. Sandip Prabhakar Bhurke at Prabhakar Bhurke Clinic.

Medical Disclaimer

This article is intended for general educational and informational purposes only and should not be considered medical advice, diagnosis or treatment. PCNL is a medical procedure that may be appropriate for some kidney stones but not others. The choice between PCNL, ureteroscopy, laser treatment, ESWL, observation or another approach depends on stone size, location, composition or density, anatomy, obstruction, infection status, kidney function and the patient's overall health. Do not delay urgent medical care for fever, chills, severe flank pain, persistent vomiting, very little or no urine, or rapidly worsening symptoms. Do not start or stop medicines, antibiotics, painkillers or fluid restrictions without professional guidance. Consult Dr. Sandip Prabhakar Bhurke or another qualified kidney or urinary-stone specialist for an individualized treatment plan.