People searching for PNL kidney stone surgery are usually referring to PCNL, or percutaneous nephrolithotomy.

PCNL is a minimally invasive procedure used to remove kidney stones through a small access tract made through the skin into the kidney. A nephroscope is passed through this tract to locate, break and remove the stone. Depending on the stone, instruments such as laser or ultrasonic devices may be used for fragmentation.

Unlike procedures that reach the kidney through the natural urinary passage, PCNL creates a direct route into the kidney. This makes it particularly useful when the stone burden is large, complex or unsuitable for simpler treatment.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides kidney evaluation and helps patients understand their kidney function and appropriate treatment pathway when significant stone disease is present.

PNL and PCNL: Are They the Same?

In most kidney-stone discussions, PNL and PCNL refer to the same type of procedure.

The complete medical term is:

Percutaneous nephrolithotomy (PCNL)

• Percutaneous means through the skin.

• Nephro refers to the kidney.

• Lithotomy refers to removal of a stone.

The abbreviation PCNL is more commonly used in medical literature and clinical practice.

When Is PCNL Considered for Kidney Stones?

PCNL is generally considered when a kidney stone is too large or complex for treatments such as observation, shock wave lithotripsy or ureteroscopy to provide an appropriate result.

It may be considered for:

• Large renal stones

• Complex or multiple stones

• Staghorn stones

• Stones with substantial stone burden

• Stones that are difficult to treat through the urinary passage

• Selected stones that have not responded adequately to another procedure

Treatment selection depends on stone size, location, anatomy, density, symptoms, obstruction, infection status and the patient's overall health. Larger stones may require a procedure such as PCNL rather than attempting spontaneous passage.

Why Is PCNL Used for Large Kidney Stones?

A large stone may be difficult to remove completely with treatments designed for smaller stones.

PCNL gives the surgeon direct access to the kidney, allowing larger fragments to be broken and removed through the access tract.

This can make PCNL particularly useful when the objective is substantial stone clearance in patients with a high stone burden.

However, PCNL is not automatically the best procedure for every large stone. Imaging and specialist assessment are needed before deciding on the treatment.

What Tests Are Done Before PNL Kidney Stone Surgery?

Before PCNL, the treating team generally needs detailed information about both the stone and the patient's medical condition.

Evaluation may include:

Imaging

A CT scan or other appropriate imaging can help determine:

• Stone size

• Stone location

• Number of stones

• Stone burden

• Kidney anatomy

• Possible obstruction

• Relationship of the stone to surrounding structures

Imaging helps the surgeon plan the safest access route.

Urine Testing

Urine testing may be used to look for:

• Blood

• Infection

• Other abnormalities

A suspected urinary infection is important because infected obstruction or infection associated with stone disease can require urgent management.

Blood Tests

Depending on the patient, tests may include:

• Serum creatinine

• eGFR

• Hemoglobin

• Electrolytes

• Blood glucose

• Other tests required before anesthesia or surgery

Kidney function is particularly important when planning treatment for patients with pre-existing kidney disease.

How Is PNL Kidney Stone Surgery Performed?

The exact technique varies according to the stone and the surgeon's approach, but the procedure generally involves several stages.

Step 1: Anesthesia

PCNL is normally performed in a hospital under anesthesia.

Step 2: Creating Access to the Kidney

A small puncture is made through the skin into the kidney.

Imaging guidance, such as ultrasound or X-ray, may be used to help establish the access safely.

Step 3: Enlarging the Access Tract

The access tract is carefully prepared so that the appropriate instruments can be introduced into the kidney.

Step 4: Locating the Stone

A nephroscope is passed through the tract to visualize the stone.

Step 5: Breaking the Stone

Depending on the stone's characteristics, the surgeon may use laser energy, ultrasonic energy or another stone-fragmentation instrument.

Step 6: Removing the Fragments

The resulting fragments are removed through the access tract.

Stone fragments may be sent for laboratory analysis to determine their composition.

Step 7: Temporary Drainage When Required

A nephrostomy tube, ureteral stent or other temporary drainage device may be placed in selected patients.

The need for a tube depends on the procedure and the patient's condition.

Is PNL Kidney Stone Surgery Painful?

PCNL is performed under anesthesia, so significant pain is not expected during the operation itself.

After the procedure, some patients may experience:

• Pain around the access site

• Flank discomfort

• Temporary urinary discomfort

• Mild blood in the urine

• Discomfort from a stent or drainage tube

Pain management is provided according to the patient's needs.

The severity and duration of postoperative discomfort vary depending on the stone burden, number of access tracts, procedure performed and individual recovery.

How Long Does PCNL Surgery Take?

The duration is not identical for every patient.

It can depend on:

• Number of stones

• Stone size

• Stone complexity

• Kidney anatomy

• Difficulty of access

• Whether multiple areas of the kidney require treatment

• Whether the procedure needs to be staged

Some PCNL procedures take a few hours, while more complex stone cases may require additional operative time.

Your treating surgeon can provide a more meaningful estimate after reviewing the imaging.

How Many Days Is Hospital Stay After PCNL?

PCNL generally requires hospital-based care, although the length of stay varies.

Some patients may be discharged after a short inpatient stay, while more complex procedures may require longer observation.

The duration can depend on:

• Bleeding

• Pain control

• Urine drainage

• Infection

• Kidney function

• Presence of a nephrostomy tube or stent

• Overall medical condition

What Happens After PNL Kidney Stone Surgery?

After the procedure, the medical team monitors:

• Urine output

• Blood pressure

• Pain

• Temperature

• Hemoglobin

• Kidney function

• Signs of infection

• Drainage from any temporary tube

Imaging may be performed when needed to determine whether significant residual stone fragments remain.

Not every patient requires identical postoperative testing.

Can a Stent Be Placed After PCNL?

Yes.

A temporary ureteral stent may be used in selected patients to help maintain urine flow from the kidney to the bladder.

A nephrostomy tube may also be used temporarily to provide drainage directly from the kidney.

Whether either device is required depends on the operative findings and the patient's clinical situation.

Can PCNL Remove All Kidney Stones in One Surgery?

Sometimes, but not always.

Complete clearance may be achieved during one procedure in some patients. However, very large, branching or multiple stones can make complete removal more difficult.

A patient may occasionally require:

• A second-look procedure

• Another PCNL session

• Ureteroscopy

• Shock wave treatment

• A staged approach

The treatment plan depends on the amount and distribution of stone material.

The goal is safe and effective stone clearance rather than assuming that every patient can be completely treated in one operation.

What Are the Risks of PNL Kidney Stone Surgery?

PCNL is an established minimally invasive procedure, but like any surgery, it has potential risks.

Possible complications include:

• Bleeding

• Infection

• Fever

• Injury to surrounding structures

• Urinary leakage

• Residual stone fragments

• Need for blood transfusion in significant bleeding

• Need for additional procedures

• Temporary drainage requirements

• Anesthesia-related complications

The individual risk depends on stone complexity, kidney anatomy, medical conditions and the surgical approach.

Patients should discuss their personal risk profile with the treating surgical team.

What If There Is a Urinary Infection Before PCNL?

A urinary infection needs careful attention before definitive stone removal.

Stone disease combined with infection and urinary obstruction can become serious and may require urgent drainage before definitive stone treatment.

Possible drainage methods include a ureteral stent or nephrostomy, depending on the clinical situation.

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

A patient with fever, chills, severe flank pain or worsening illness should seek urgent medical attention rather than waiting for a planned stone procedure.

PCNL Recovery: What Should Patients Expect?

Recovery varies from person to person.

After discharge, temporary symptoms can include:

• Mild flank soreness

• Fatigue

• Mild blood in urine

• Urinary frequency or discomfort if a stent is present

• Temporary discomfort around the access site

Patients should follow the surgeon's instructions regarding activity, wound care, medicines, hydration and follow-up.

Heavy physical activity may need to be avoided for a period after surgery, depending on the procedure and the surgeon's advice.

When Can Normal Activities Resume After PCNL?

There is no single recovery timeline for every patient.

A person with a straightforward procedure may recover more quickly than someone who has:

• Very large stones

• Multiple stones

• Infection

• Reduced kidney function

• Significant bleeding

• Multiple access tracts

• A staged procedure

The treating surgeon should provide individualized instructions about returning to work, exercise and other activities.

What Is the Difference Between PCNL, Laser Treatment and ESWL?

These procedures approach kidney stones differently.

Procedure	General approach	Often considered for
PCNL	Direct access through a small tract into the kidney	Larger or complex kidney stones
Ureteroscopy / laser	Scope passes through the urinary tract to the stone	Selected kidney and ureteral stones
ESWL / SWL	External shock waves fragment the stone	Selected stones based on size, location and other factors

No procedure is automatically best for every patient.

Stone size, location, density, anatomy, obstruction, infection and previous treatment all influence the decision.

Is PCNL Better Than Laser Treatment?

It is not accurate to say that PCNL is universally better than laser treatment.

“Laser treatment” usually refers to laser lithotripsy performed through ureteroscopy or another endoscopic approach.

For some stones, flexible ureteroscopy may be appropriate. For larger or more complex renal stone burdens, PCNL may offer a more suitable route for removing a substantial amount of stone material.

The correct choice requires review of the imaging and the patient's medical condition.

Is PNL Kidney Stone Surgery Suitable for Every Patient?

No.

Before surgery, the treating team considers:

• Stone characteristics

• Kidney anatomy

• Kidney function

• Urinary infection

• Bleeding risk

• Current medications

• Other medical conditions

• Anesthesia fitness

Patients taking blood-thinning medicines should not stop them independently. The surgical and medical teams should decide whether and when medication changes are appropriate.

What Happens to the Stone After Surgery?

Whenever possible, retrieved stone material can be analyzed.

Stone composition may provide useful information for future prevention.

Depending on the patient's history, the doctor may later recommend metabolic evaluation, including urine testing, to identify factors that increase the likelihood of forming additional stones. NIDDK notes that analysis of removed stones and urine evaluation can help guide prevention.

How Can Kidney Stones Be Prevented After PCNL?

Removing a stone treats the existing stone burden but does not necessarily eliminate the reason the stone formed.

Depending on the stone type and individual risk factors, prevention may include:

• Appropriate fluid intake

• Reducing excessive dietary sodium

• Following an individualized dietary plan

• Maintaining appropriate dietary calcium

• Avoiding unnecessary supplements

• Treating recurrent urinary infections

• Taking prescribed preventive medicines

• Completing stone analysis

• Metabolic evaluation when indicated

The prevention plan should be individualized rather than based on a generic “kidney stone diet.”

When Should You Contact a Doctor After PCNL?

Contact your treating team promptly if you develop:

• Fever or chills

• Increasing flank pain

• Heavy or persistent bleeding

• Difficulty passing urine

• Very low urine output

• Persistent vomiting

• Severe weakness

• Increasing redness or discharge around a wound

• Shortness of breath

• Rapid deterioration

These symptoms may indicate infection, bleeding, obstruction or another postoperative complication.

Role of a Nephrologist in Kidney Stone Patients

PCNL itself is a urological procedure and is generally performed by a urologist.

A nephrologist may be involved when the patient also has:

• Chronic kidney disease

• Reduced kidney function

• Recurrent stones

• Electrolyte abnormalities

• High blood pressure

• Proteinuria

• Other medical kidney conditions

This multidisciplinary approach can be particularly useful when stone disease occurs alongside impaired kidney function.

PNL Kidney Stone Evaluation at Prabhakar Bhurke Clinic

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

Depending on the clinical situation, assessment may include:

• Review of CT or ultrasound findings

• Kidney-function evaluation

• Creatinine and eGFR assessment

• Urine examination

• Assessment for urinary obstruction

• Evaluation of recurrent stone disease

• Review of medical conditions and medicines

• Assessment of kidney-related complications

• Coordination with appropriate urological specialists when surgical stone removal is required

• Follow-up kidney care after stone treatment

The appropriate treatment depends on the stone burden, anatomy, kidney function, infection status and overall health.

Frequently Asked Questions

Is PNL the same as PCNL for kidney stones?

In common clinical usage, PNL is generally referring to percutaneous nephrolithotomy, usually abbreviated as PCNL. PCNL is the more commonly used medical abbreviation.

What size kidney stone requires PCNL?

There is no single size that automatically requires PCNL. Larger and complex renal stones are more likely to be considered for PCNL, but location, anatomy, density, stone burden and patient factors also influence treatment selection.

Is PNL kidney stone surgery safe?

PCNL is an established minimally invasive treatment, but it carries risks such as bleeding, infection, injury to surrounding structures and residual stones. Individual risk varies and should be discussed with the treating surgical team.

How long does it take to recover from PCNL?

Recovery varies according to stone complexity, procedure details and the patient's health. Some patients recover relatively quickly, while complex cases may require longer observation or additional procedures.

Can PCNL remove a 2 cm kidney stone?

PCNL is commonly considered for larger renal stones, including stones around or above this size, depending on their location and other characteristics. The final decision requires imaging and specialist assessment.

Is PCNL better than ESWL?

Not necessarily for every patient. PCNL, ESWL and ureteroscopy have different strengths and are selected according to stone size, location, anatomy, density and clinical circumstances.

Can kidney stones come back after PCNL?

Yes. PCNL removes existing stones but does not necessarily remove the metabolic or dietary factors responsible for stone formation. Stone analysis and preventive evaluation may help reduce recurrence.

Is PCNL a major surgery?

PCNL is a minimally invasive surgical procedure rather than open kidney surgery, but it is still an operation performed under anesthesia and requires appropriate preoperative and postoperative care.

Conclusion

PNL kidney stone surgery, more commonly called PCNL or percutaneous nephrolithotomy, provides a direct minimally invasive route for removing selected kidney stones.

It is particularly useful when the stone burden is large or complex and other approaches may not provide appropriate clearance. During the procedure, a small access tract is created through the back into the kidney, allowing specialized instruments to fragment and remove the stone.

The decision to undergo PCNL should be based on detailed imaging, stone characteristics, urinary drainage, infection status, kidney function and overall health.

PCNL can be highly effective, but some patients may require staged treatment or an alternative procedure such as ureteroscopy or ESWL.

For kidney-function assessment and individualized 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. “PNL” commonly refers to percutaneous nephrolithotomy, usually abbreviated as PCNL, but terminology can vary. Not every kidney stone requires PCNL, and the appropriate procedure depends on stone size, location, composition or density, anatomy, obstruction, infection status, kidney function and overall health. PCNL has potential risks, including bleeding, infection, injury and residual stones. Do not stop blood thinners or other prescribed medicines without instructions from your treating doctor. Fever, chills, severe flank pain, very little or no urine, heavy bleeding, severe weakness or rapidly worsening symptoms require prompt medical assessment. Consult Dr. Sandip Prabhakar Bhurke, a qualified urologist, nephrologist or appropriate specialist, for an individualized treatment plan.