When a kidney stone is too large to pass naturally or is unlikely to be cleared effectively with less invasive treatments, a surgical procedure may be recommended. One established option is percutaneous nephrolithotomy (PCNL).
PCNL is a minimally invasive operation in which a specialist creates a small opening through the skin of the back to reach the kidney and remove or fragment stones. It is commonly considered for large or complex renal stones, including stones measuring more than 2 cm.
Unlike ureteroscopy, which reaches stones through the urinary tract, PCNL provides direct access to the kidney through a small tract.
At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides kidney evaluation and helps patients understand kidney-function concerns associated with renal stones. When a stone-removal procedure is needed, assessment and treatment planning may involve coordination with a qualified urologist experienced in PCNL.
When Is PCNL Recommended for a Kidney Stone?
PCNL is not necessary for every kidney stone. The decision depends on the stone's size, location, number, anatomy, symptoms and effect on kidney function.
A urologist may consider PCNL when:
- A renal stone is larger than approximately 2 cm.
- A large stone occupies multiple parts of the kidney.
- A staghorn calculus fills a substantial portion of the kidney's collecting system.
- Other procedures are less likely to achieve adequate stone clearance.
- A stone is associated with obstruction, recurrent infection or persistent symptoms.
- The stone burden is too extensive for a suitable alternative treatment.
For larger renal stones, European Association of Urology guidance identifies PCNL as a first-line treatment option, while other approaches may be considered when PCNL is unsuitable.
Smaller stones may be managed through observation, shock wave lithotripsy or ureteroscopy, depending on their characteristics and the patient's circumstances.
How Is PCNL Different From Other Kidney Stone Procedures?
Several procedures are available for renal stone removal. Each has different advantages and limitations.
| Procedure | How it works | When it may be considered |
|---|---|---|
| PCNL | Reaches the kidney through a small opening in the back | Large or complex kidney stones |
| Ureteroscopy with laser | Reaches stones through the urinary tract and fragments them using a laser | Selected kidney or ureteral stones |
| RIRS | Uses a flexible ureteroscope to reach stones inside the kidney | Selected stones, including some that are difficult to access externally |
| ESWL or SWL | Uses externally generated shock waves to fragment stones | Selected stones with favorable characteristics |
The best procedure depends on stone size, location, density, anatomy, infection status and the patient's general health. PCNL may provide more effective clearance for certain large stones, but it is not automatically the best option for every patient.
What Happens Before PCNL Surgery?
Preparation helps the treating team understand the stone burden, plan a safe route into the kidney and identify conditions that could increase surgical risk.
Imaging and Stone Assessment
A CT scan is often used to assess the number and position of stones and the anatomy of the kidney's collecting system. Ultrasound and other imaging may also be relevant.
Preoperative imaging helps the surgeon plan the access route and select an appropriate approach.
Urine Testing
A urine test and urine culture may be performed to check for infection.
A urinary infection should be treated before planned stone removal. If an obstructed urinary tract is infected, urgent drainage may be needed before definitive stone surgery.
Blood Tests and Kidney Function
Depending on the patient's condition, tests may include:
- Serum creatinine and eGFR
- Complete blood count
- Electrolytes
- Blood clotting tests
- Other tests needed for anesthesia and surgical planning
Medication Review
Tell the treating team about all prescription medicines, over-the-counter products and supplements. Blood-thinning medicines may require specific planning, but they should never be stopped independently.
The team will also explain fasting instructions, anesthesia, expected hospital stay and postoperative care.
How Is the PCNL Procedure Performed?
PCNL is generally performed in a hospital under anesthesia.
Although the exact technique varies, the procedure commonly involves these stages:
- Access to the urinary tract: The team may first pass a small instrument through the bladder and ureter to help with access or drainage.
- Creating kidney access: A small tract is made through the skin of the back into the kidney's collecting system.
- Stone visualization: A nephroscope is passed through the tract to locate the stone.
- Fragmentation and removal: The stone is removed directly or broken into smaller pieces using appropriate instruments or energy sources.
- Drainage and completion: The surgeon checks the treatment result and decides whether a temporary nephrostomy tube, ureteral stent or other drainage device is needed.
The technique is selected according to the stone burden, anatomy and operative findings. Some uncomplicated procedures can be completed without a nephrostomy tube, while other patients need temporary drainage.
Does PCNL Remove the Entire Kidney Stone in One Operation?
PCNL is designed to remove a substantial stone burden, but complete clearance in a single session cannot be guaranteed.
The outcome can depend on:
- The number of stones
- Stone size and hardness
- Whether the stone extends into multiple calyces
- Kidney anatomy
- Bleeding or visibility during the procedure
- Whether all stone fragments can be reached safely
Some patients may need a second-look procedure, another stone-removal technique or follow-up treatment for residual fragments.
The treating urologist will explain the expected clearance rate and the possibility of additional procedures based on the imaging findings.
What Are the Possible Risks of PCNL?
PCNL is an established treatment, but it involves surgical risks.
Potential complications include:
- Bleeding, occasionally requiring transfusion or additional treatment
- Urinary infection or sepsis
- Injury to the kidney or nearby structures
- Urine leakage
- Residual stone fragments
- Temporary pain or discomfort
- Need for a stent, nephrostomy tube or another procedure
- Risks associated with anesthesia
The likelihood of complications varies with the stone's complexity, infection status, medical conditions and surgical circumstances.
Preoperative assessment, infection management and appropriate postoperative monitoring help the team reduce and respond to these risks.
Recovery After PCNL: What Should Patients Expect?
Recovery varies depending on the complexity of the operation and the patient's overall health.
Some patients remain in hospital for observation and monitoring before going home. The length of stay depends on the procedure, kidney drainage, pain control, bleeding, infection risk and other clinical factors.
During recovery, patients may experience temporary:
- Soreness around the access site
- Mild blood in the urine
- Urinary urgency or discomfort if a stent is present
- Tiredness after anesthesia
- Discomfort while passing small residual fragments
Follow the treating team's instructions regarding wound care, activity, pain medicines, fluid intake and follow-up appointments.
Do not resume strenuous activity or change prescribed medicines without checking with the treating team.
Why Might a Nephrostomy Tube or Ureteral Stent Be Needed?
A drainage device may be placed during or after PCNL when it is needed to maintain urine flow or support healing.
A nephrostomy tube drains urine from the kidney through the skin into an external collection bag.
A ureteral stent is an internal tube that helps urine travel from the kidney to the bladder.
The choice depends on the operative findings, residual fragments, swelling, bleeding, infection concerns and the need for continued drainage.
Not every patient needs both devices, and uncomplicated cases may not require a nephrostomy tube.
If a stent or tube is placed, ask the treating team how it should be cared for and when it must be removed or exchanged.
How Do Doctors Confirm That the Stone Has Been Cleared?
Follow-up is important because symptoms alone cannot confirm complete stone removal.
Depending on the situation, the treating team may recommend:
- Ultrasound or other imaging
- Review of residual stone fragments
- Kidney-function blood tests
- Urine testing if infection is suspected
- Stent or nephrostomy tube review
- Stone analysis
A recovered stone or fragment may be sent for laboratory analysis to identify its composition. This information can help guide preventive care.
Can Kidney Stones Return After PCNL?
Yes. PCNL removes existing stones but does not automatically eliminate the factors that cause new stones to form.
Prevention depends on the stone type, urine chemistry, dietary habits and medical history.
A personalized prevention plan may include:
- Appropriate fluid intake, if medically suitable
- Reducing excessive sodium
- Maintaining a balanced diet
- Reviewing medicines and supplements
- Treating relevant metabolic conditions
- Stone analysis
- A 24-hour urine evaluation for selected patients with recurrent or high-risk stones
People with chronic kidney disease, heart failure or prescribed fluid restrictions should not increase fluid intake without medical advice.
What If a Kidney Stone Is Infected or Blocking Urine?
An obstructed kidney with a suspected infection can become a medical emergency.
Warning signs include fever, chills, severe flank pain, vomiting, reduced urine output or feeling acutely unwell.
In this situation, urgent drainage with a ureteral stent or nephrostomy may be required, along with appropriate infection treatment. Definitive stone removal is generally delayed until the infection is controlled when clinically significant infection and obstruction are present.
Seek urgent medical care rather than waiting for a planned PCNL appointment if these symptoms develop.
PCNL Renal Stone Evaluation at Prabhakar Bhurke Clinic
At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized evaluation for patients with kidney stones and associated kidney-function concerns.
Depending on the patient's needs, care may include:
- Reviewing creatinine and eGFR
- Assessing the effect of stones on kidney function
- Reviewing urine tests and imaging reports
- Evaluating infection or urinary obstruction
- Assessing associated chronic kidney disease
- Reviewing medicines and relevant medical conditions
- Coordinating with a qualified urologist for surgical stone management when required
- Planning kidney-function monitoring and recurrence prevention
PCNL is a surgical procedure generally performed by a urologist with appropriate training and experience. Nephrology care can complement surgical management when kidney function, electrolyte abnormalities or other medical conditions need attention.
Frequently Asked Questions About PCNL Renal Stones
What does PCNL mean in kidney stone treatment?
PCNL stands for percutaneous nephrolithotomy. It is a procedure that reaches the kidney through a small opening in the back to remove or fragment renal stones.
What size kidney stone usually needs PCNL?
PCNL is commonly recommended as a first-line option for many renal stones larger than 2 cm. Smaller stones may also require it in selected situations, depending on location, complexity and other factors.
Is PCNL a major operation?
PCNL is minimally invasive compared with open stone surgery, but it is still an operation performed under anesthesia and has potential risks, including bleeding and infection.
How long does recovery after PCNL take?
Recovery varies with stone complexity, the patient's health, complications and whether drainage devices are used. The treating surgeon provides individualized instructions and a timeline.
Can PCNL damage kidney function?
PCNL is intended to remove stones while preserving the kidney, but complications can occur. The risk depends on the patient's condition, stone complexity and procedural factors. Kidney function may be monitored before and after treatment.
Will I need a stent after PCNL?
Not always. A ureteral stent or nephrostomy tube may be used when drainage or other clinical considerations make it necessary. The decision depends on the operative findings.
Is PCNL better than laser treatment?
Neither procedure is best for every patient. PCNL is often preferred for large stone burdens, while ureteroscopy with laser treatment or RIRS may be appropriate for selected stones. Imaging and specialist assessment guide the choice.
Conclusion
PCNL renal stone treatment is an established option for removing large or complex stones that may not be adequately treated with less invasive approaches. The procedure provides direct access to the kidney through a small opening in the back and can achieve substantial stone clearance in appropriately selected patients.
Successful treatment involves more than the operation itself. Imaging, infection assessment, kidney-function testing, postoperative monitoring and a plan to prevent recurrence all contribute to comprehensive care.
If you have been advised to undergo PCNL, discuss the benefits, risks, alternatives and expected recovery with a qualified urologist. For evaluation of kidney function and related medical concerns, consult Dr. Sandip Prabhakar Bhurke at Prabhakar Bhurke Clinic.
Medical Disclaimer
This article is intended for general educational and informational purposes only and is not a substitute for medical diagnosis, treatment or individualized advice. PCNL suitability depends on stone size, location, anatomy, infection status, kidney function and overall health. The procedure has potential complications, including bleeding, infection, injury to nearby structures and residual stones. Not every renal stone requires surgery, and alternative treatments may be appropriate. Do not change medicines, fluid intake or treatment plans based solely on this article. Fever or chills with a suspected obstructing kidney stone, very little or no urine, severe pain with vomiting, or sudden deterioration requires urgent medical evaluation. Consult a qualified urologist for stone-removal decisions and Dr. Sandip Prabhakar Bhurke or another qualified nephrologist for individualized kidney care.
