PCNL, or percutaneous nephrolithotomy, is a minimally invasive procedure used to remove kidney stones through a small access tract created through the skin into the kidney.

The term “PCNL stone treatment” generally refers to using this procedure to remove stones that may be too large, numerous, hard or difficult to treat effectively with simpler approaches.

During PCNL, a nephroscope is introduced directly into the kidney through a small opening in the back. The stone can then be fragmented and removed using specialized instruments. For larger stones, laser or other energy sources may be used to break the stone into smaller pieces.

The choice of treatment depends on factors such as stone size, location, number, composition, kidney anatomy, obstruction, infection and the patient's overall health.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist kidney evaluation and can help assess kidney function and coordinate appropriate care when large or complex kidney stones are present.

When Is PCNL Recommended for a Kidney Stone?

PCNL is generally considered when active removal of a kidney stone is required and other approaches may be less suitable.

It may be considered for:

• Large kidney stones

• Complex or multiple stones

• Large stone burden occupying several parts of the kidney

• Stones that are unlikely to clear adequately with shock wave treatment

• Stones associated with obstruction

• Selected staghorn or branching stones

• Stones that have not been successfully treated with another procedure

NIDDK notes that larger kidney stones may require procedures such as PCNL, ureteroscopy or shock wave lithotripsy depending on the individual situation.

PCNL is not automatically required simply because a stone is present. The treating specialist must assess the imaging and clinical circumstances.

What Does “PCNL Stone” Mean?

“PCNL stone” is not a separate type of kidney stone.

It usually means a kidney stone being treated with PCNL.

Kidney stones can be composed of different materials, including:

• Calcium oxalate

• Calcium phosphate

• Uric acid

• Struvite

• Cystine

The composition can influence prevention and, in some situations, treatment planning.

After stone removal, stone fragments may be sent for laboratory analysis to determine their composition.

Why Might a Large Kidney Stone Need PCNL?

Large stones can be difficult to remove completely through spontaneous passage.

A stone may also:

• Obstruct urine drainage

• Cause recurrent pain

• Lead to repeated urinary infections

• Produce bleeding in the urine

• Affect kidney function

• Continue growing within the kidney

Kidney stones that block urine flow or cause significant symptoms may require active treatment rather than observation.

PCNL allows the surgeon to reach the kidney directly and remove a substantial amount of stone material during the procedure.

How Is PCNL Performed?

Although the exact technique varies between patients, PCNL generally involves several stages.

1. Preoperative Imaging

The stone's location, size, number and relationship to surrounding structures are assessed using appropriate imaging.

A CT scan may provide detailed information useful for procedural planning in selected patients.

2. Anesthesia

PCNL is generally performed under anesthesia in a hospital setting.

3. Creating Kidney Access

The specialist creates a small access tract through the skin into the kidney.

4. Introducing the Nephroscope

A specialized viewing instrument called a nephroscope is passed through the access tract.

This allows the treating surgeon to visualize the stone directly.

5. Fragmenting the Stone

Depending on the stone characteristics, specialized energy devices may break the stone into smaller fragments.

Laser or other lithotripsy technologies may be used depending on the procedure.

6. Removing the Fragments

Stone pieces are extracted through the access tract.

7. Completing the Procedure

The team checks the kidney and urinary drainage before deciding whether a nephrostomy tube, ureteral stent or another temporary device is needed.

Not every patient requires exactly the same postoperative drainage strategy.

Is PCNL a Major Surgery?

PCNL is considered a minimally invasive kidney stone procedure, but it is still a surgical intervention and carries potential risks.

Unlike open stone surgery, PCNL uses a relatively small access tract rather than a large surgical incision.

The procedure nevertheless requires anesthesia, specialized equipment and careful planning.

The expected hospital stay and recovery vary according to stone complexity, the patient's health and whether complications occur.

What Tests Are Needed Before PCNL?

Before stone removal, the medical team may review:

• Kidney function

• Serum creatinine

• eGFR

• Urinalysis

• Urine culture

• Complete blood count

• Electrolytes

• Blood-clotting tests when appropriate

• CT or other stone imaging

• Current medications

• Other medical conditions

A urinary infection is particularly important to identify before definitive stone removal.

If a stone is blocking the urinary tract and infection is present, urgent drainage may be required before definitive stone treatment.

Why Is Urine Infection Important Before PCNL?

A kidney stone can sometimes coexist with a urinary infection.

Manipulating an infected obstructed urinary system can increase the risk of serious complications.

If infection is suspected, the healthcare team may perform urine testing and culture and prescribe appropriate antibiotics.

In certain situations, the immediate priority is to restore urine drainage rather than remove the entire stone at once.

Definitive stone treatment can then be planned after the infection has been appropriately managed.

PCNL for Large Kidney Stones

PCNL is particularly relevant when the stone burden is substantial.

Large stones may occupy the renal pelvis or extend into multiple calyces.

Depending on the stone's configuration, the surgeon may use:

• A standard PCNL approach

• A smaller tract approach in selected cases

• Multiple access tracts in selected complex cases

• Staged procedures when complete removal in one session is not appropriate

The objective is to achieve effective stone clearance while minimizing avoidable injury and complications.

Can PCNL Remove Multiple Kidney Stones?

Yes, PCNL can sometimes be used to treat multiple stones during the same treatment plan.

Whether all stones should be removed in one procedure depends on:

• Total stone burden

• Stone locations

• Kidney anatomy

• Infection status

• Operative risk

• Expected procedure duration

Some patients may benefit from a staged approach rather than attempting complete clearance in one session.

PCNL vs Laser Ureteroscopy

Both PCNL and flexible ureteroscopy can be used to treat kidney stones, but they reach the stones differently.

PCNL

The kidney is accessed through a small tract created through the skin.

This approach can be particularly useful for larger stone burdens.

Flexible Ureteroscopy

A thin scope is introduced through the natural urinary passage and advanced through the ureter into the kidney.

Laser energy can then fragment the stone.

Which Is Better?

There is no universal answer.

The decision depends on:

• Stone size

• Stone location

• Stone density

• Number of stones

• Kidney anatomy

• Previous procedures

• Patient health

• Expected stone-free rate

A specialist should select the procedure after reviewing the imaging and clinical situation.

PCNL vs ESWL

ESWL, or shock wave lithotripsy, uses externally generated shock waves to fragment a stone.

PCNL physically accesses the kidney to fragment and remove stone material.

ESWL may be suitable for selected stones, but larger or complex stones may be less suitable for complete clearance with shock wave treatment alone.

NIDDK lists shock wave lithotripsy, ureteroscopy and PCNL among established approaches for kidney stone removal, with treatment selected according to the stone and patient.

Can a Kidney Stone Be Treated Without PCNL?

Yes.

Not every kidney stone requires PCNL.

Depending on the clinical situation, alternatives can include:

• Observation for selected small stones

• Medical treatment for symptoms

• Shock wave lithotripsy

• Flexible ureteroscopy

• Laser lithotripsy

• RIRS

• Staged procedures

Small stones may sometimes pass naturally, while larger, obstructing or severely symptomatic stones may require active removal.

What Happens After PCNL?

After the procedure, the medical team monitors:

• Pain

• Urine output

• Blood pressure

• Temperature

• Kidney function

• Blood counts

• Urinary drainage

• Possible bleeding or infection

A temporary nephrostomy tube or ureteral stent may be used in selected patients.

The exact postoperative plan varies according to the procedure and clinical findings.

PCNL Recovery Time

Recovery differs from patient to patient.

Some people may resume normal activities relatively quickly, while recovery can take longer after complex or staged procedures.

During recovery, patients may temporarily experience:

• Mild blood in urine

• Flank discomfort

• Urinary frequency

• Tiredness

• Temporary irritation from a stent or nephrostomy tube

The treating team will provide specific instructions about medicines, wound care, activity, hydration and follow-up.

Do not assume that a fixed recovery period applies to everyone.

What Are the Possible PCNL Complications?

PCNL is generally performed using established minimally invasive techniques, but complications can occur.

Possible risks include:

• Bleeding

• Infection

• Fever

• Injury to surrounding structures

• Residual stone fragments

• Urinary leakage

• Blood transfusion in selected cases

• Need for additional procedures

• Anesthesia-related complications

The risk varies with stone complexity, anatomy, infection status, medical conditions and the technique used.

Patients should discuss individual risks with the treating surgical team before the procedure.

Can PCNL Damage the Kidney?

PCNL creates a controlled access tract into the kidney to reach the stone.

As with any kidney procedure, there is a potential for injury or bleeding.

However, the procedure is specifically designed to remove stones while preserving kidney function as much as possible.

In many patients, leaving a large obstructing or infection-associated stone untreated may itself pose a risk to the urinary system and kidney function.

The benefits and risks therefore need to be considered individually.

Is a Stent Needed After PCNL?

A ureteral stent may be placed after PCNL in selected patients.

A stent can help maintain urine drainage and may be useful when:

• The ureter needs temporary support

• Stone fragments remain

• There is postoperative swelling

• The surgeon wants to maintain drainage during recovery

A stent is usually temporary and should be removed or exchanged according to the treating specialist's plan.

Can PCNL Require a Second Procedure?

Yes.

A second procedure may sometimes be recommended if:

• A significant amount of stone remains

• The stone is very complex

• Multiple kidney areas are involved

• Access to all stone fragments is difficult

• The procedure needs to be stopped for safety reasons

• Additional treatment is required for residual stones

A staged approach can sometimes be safer than attempting complete clearance in a single prolonged procedure.

What Happens to the Kidney After Stone Removal?

Once the stone is removed, urine drainage may improve if the stone had been causing obstruction.

However, kidney recovery depends on:

• Duration of obstruction

• Degree of previous damage

• Infection

• Baseline kidney function

• Other kidney diseases

Removing a stone does not automatically restore kidney function if permanent damage has already developed.

How Can New Kidney Stones Be Prevented After PCNL?

Stone removal treats the existing stone but does not necessarily eliminate the reason the stone formed.

Prevention should therefore be considered after treatment.

Depending on the stone type, prevention may involve:

• Appropriate fluid intake

• Reducing excessive sodium

• Individualized dietary changes

• Appropriate dietary calcium

• Reviewing animal protein intake

• Stone analysis

• 24-hour urine testing in selected patients

• Preventive medicines when indicated

NIDDK notes that future prevention depends partly on understanding the type of stone and may involve changes in fluid intake, sodium, animal protein, calcium or oxalate depending on the individual's stone type.

When Is a Kidney Stone an Emergency?

Seek urgent medical attention if a known kidney stone is accompanied by:

• Fever or chills

• Severe or worsening flank pain

• Very little or no urine

• Persistent vomiting

• Severe weakness

• Confusion

• Signs of serious infection

• Rapid deterioration

A blocked urinary tract with infection can become dangerous and may require urgent drainage and medical treatment.

Kidney Stone and PCNL 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 kidney stones and associated kidney-function concerns.

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

• Review of CT or ultrasound findings

• Assessment of kidney function

• Creatinine and eGFR evaluation

• Assessment of urinary obstruction

• Urine examination and infection assessment

• Review of recurrent stone history

• Evaluation of stone-related kidney damage

• Medical management of kidney-related complications

• Coordination with appropriate urological specialists for stone removal procedures

• Follow-up kidney care after stone treatment

PCNL and other stone-removal procedures should be selected after detailed assessment of the stone and the patient's overall health.

Frequently Asked Questions

What is PCNL for kidney stones?

PCNL is a minimally invasive procedure in which a small tract is created through the skin into the kidney so that a nephroscope and specialized instruments can be used to fragment and remove kidney stones.

Which kidney stones need PCNL?

PCNL is commonly considered for larger or complex renal stones, but the appropriate procedure depends on stone size, location, burden, anatomy, infection status and the patient's health.

Is PCNL better than laser treatment?

PCNL and laser ureteroscopy are different approaches. PCNL may be more suitable for larger stone burdens, while flexible ureteroscopy with laser can be useful for many smaller or strategically located stones. The choice is individualized.

Is PCNL a painful procedure?

The procedure is performed under anesthesia, so pain during surgery is controlled. Some flank discomfort can occur during recovery and is managed according to the treating team's plan.

How long does it take to recover from PCNL?

Recovery varies depending on stone complexity, the procedure performed, complications and the patient's overall health. The treating surgeon should provide individualized activity and recovery instructions.

Is PCNL safe for patients with kidney disease?

PCNL can be performed in selected patients with impaired kidney function, but pre-existing kidney disease requires careful assessment and planning. Kidney function, medications, infection status and overall health should be reviewed before treatment.

Can PCNL completely remove a large kidney stone?

PCNL can achieve substantial stone clearance, but complete removal is not guaranteed in every case. Very complex stones may require staged or additional treatment.

Can kidney stones come back after PCNL?

Yes. PCNL removes existing stones but does not automatically eliminate the metabolic or dietary factors that caused them. Stone analysis and preventive evaluation can help reduce recurrence risk.

Conclusion

PCNL stone treatment is an important option for removing larger, complex or otherwise difficult-to-treat kidney stones. The procedure reaches the kidney through a small tract in the back, allowing the treating surgeon to fragment and remove stone material directly.

PCNL is not the right procedure for every kidney stone. The decision depends on the stone's size, location, number, composition, anatomy, obstruction, infection status and the patient's overall health.

Depending on the circumstances, alternatives such as flexible ureteroscopy with laser treatment, RIRS or ESWL may be considered.

Before stone removal, kidney function and urinary infection should be appropriately assessed. After treatment, stone analysis and preventive evaluation can help reduce the risk of future stones.

For individualized kidney evaluation and management of kidney-stone-related problems, 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 and is not appropriate for every kidney stone. The choice between PCNL, ureteroscopy, laser lithotripsy, RIRS, ESWL, observation or another treatment depends on stone size, location, number, composition, kidney anatomy, obstruction, infection status, kidney function and the patient's overall health. Do not delay medical care for a large or obstructing kidney stone or attempt to treat it with unprescribed medicines or excessive fluid intake. Fever, chills, severe flank pain, persistent vomiting, very little or no urine, confusion or rapidly worsening symptoms require urgent medical assessment. Consult Dr. Sandip Prabhakar Bhurke or another qualified kidney or urinary-stone specialist for an individualized treatment plan.