Fraud Blocker ...

Same Day Appointments Available

Retrograde Intra Renal Surgery (RIRS) Treatment in Singapore

If you’re experiencing kidney stones or other upper urinary tract conditions, you understand the discomfort and concern these issues can cause. Retrograde Intrarenal Surgery (RIRS) is a minimally invasive treatment option for kidney stones and examining the inner structures of your kidney. This endoscopic procedure allows urologists to access and treat kidney conditions without external incisions, providing patients with a treatment approach that may reduce discomfort and recovery time compared to traditional open surgery. In Singapore, RIRS has become an established treatment option for patients with kidney stone conditions. Individual results and timelines may vary.

Dr. Nor Azhari Bin Mohd Zam
Dr. Nor Azhari Bin Mohd Zam

MBBS (NUS)|MRCS (Edin.)|MMed Surgery (NUS)|FAMS (Urology)

doctor holding anatomical kidney adrenal gland mod 2025 03 10 04 18 45 utc Retrograde Intra Renal Surgery (RIRS)

What is Retrograde Intra Renal Surgery (RIRS)?

Retrograde Intra Renal Surgery (RIRS) is a minimally invasive endoscopic procedure used to diagnose and treat conditions affecting the kidney and upper urinary tract. During this procedure, a thin, flexible endoscope is passed through the urethra and bladder, then up through the ureter to reach the kidney. This approach allows direct visualisation of the kidney’s internal structures without requiring any external incisions.

RIRS primarily addresses kidney stones, particularly those located in difficult-to-reach areas of the kidney or those that may not have responded to other treatments such as shock wave lithotripsy. The procedure enables urologists to fragment stones using laser energy and remove the pieces, or to perform biopsies and treat other kidney abnormalities. The ureteroscope’s flexibility allows access to virtually all parts of the kidney’s collecting system, enabling treatment of multiple stones in different locations during a single procedure.

The procedure can provide both diagnostic and therapeutic benefits. While examining the kidney’s interior, urologists may be able to address identified problems, potentially reducing the need for multiple procedures in some cases.

Who is a Suitable Candidate?

Potential Candidates

Potential Candidates

  • Patients with kidney stones between 1-2 cm in size, though larger stones may be treated in staged procedures
  • Individuals with stones in the lower pole of the kidney, where other treatments may be less suitable
  • Patients who have not responded to shock wave lithotripsy (ESWL) treatment
  • Those with multiple kidney stones requiring comprehensive treatment
  • Individuals with stones in anatomically challenging locations
  • Patients with bleeding disorders who cannot safely undergo percutaneous procedures
  • People with obesity for whom external shock wave treatment may be less suitable
  • Patients requiring simultaneous diagnostic evaluation of the upper urinary tract
  • Individuals with ureteral strictures that need assessment along with stone treatment
Contraindications

Contraindications

  • Active urinary tract infection that hasn’t been treated
  • Severe cardiopulmonary conditions that make general anaesthesia unsafe
  • Uncorrected bleeding disorders or anticoagulation that cannot be safely stopped
  • Pregnancy, particularly in the early stages
  • Severe ureteral strictures that prevent scope passage
  • Previous urinary tract reconstruction that alters anatomy significantly

A thorough evaluation by a urologist is essential to determine if RIRS is appropriate for your specific condition. Your medical history, stone characteristics, kidney anatomy, and overall health status all play crucial roles in this assessment.

Treatment Techniques & Approaches

  • Flexible Ureteroscopy Technique

    The primary technique in RIRS involves using a flexible ureteroscope, a thin, bendable instrument with a camera and a working channel. This scope can navigate the natural curves of the urinary system and reach areas within the kidney. The flexibility allows the urologist to inspect the collecting system, aiming to identify stones or abnormalities. Digital ureteroscopes provide imaging that may enhance visualisation of stones and abnormalities.

  • Laser Lithotripsy Method

    Once stones are located, holmium laser lithotripsy may be employed to fragment them. The laser fibre is passed through the ureteroscope’s working channel to deliver energy to the stone. The urologist can choose between the dusting technique (breaking stones into small particles that may pass naturally) or the fragmentation (breaking stones into retrievable pieces). The choice depends on stone size, composition, and location within the kidney.

  • Stone Retrieval Techniques

    For fragmented stones, various retrieval methods are available. Basket extractors can grasp and remove stone fragments, while in some cases, they may benefit from using a ureteral access sheath to facilitate multiple passes of the ureteroscope. Small fragments may be left to pass naturally, while larger pieces are actively removed to help prevent future stone episodes.

  • Technology & Equipment Used

    Modern RIRS utilises digital flexible ureteroscopes with optics and deflection capabilities. Holmium: YAG lasers fragment stones with minimal tissue damage. Navigation systems and fluoroscopy guide the procedure, while specialised retrieval devices, irrigation systems, and ureteral access sheaths may enhance procedural efficiency and safety.

Wondering which approach might suit you best?

Dr Azhari can evaluate your specific needs and discuss available treatment options.

The Treatment Process

Pre-Treatment Preparation

Before your RIRS procedure, you’ll undergo a comprehensive evaluation, including urine tests to rule out infection, blood tests to assess kidney function and clotting status, and imaging studies (CT scan or ultrasound) to map stone locations. You’ll receive instructions to stop certain medications, particularly blood thinners, several days before the procedure. Fasting may be required before surgery when general anaesthesia is planned. Some patients may need antibiotics started before the procedure, especially if there’s a history of recurrent infections. Pre-operative ureteral stenting might be necessary in some cases to dilate the ureter for easier scope passage.

During the Procedure

RIRS is typically performed under general anaesthesia, though spinal anaesthesia may be used in selected cases. The procedure begins with cystoscopy to examine the bladder, followed by guidewire placement into the affected kidney under X-ray guidance. The flexible ureteroscope is then advanced over the guidewire to reach the kidney.

Systematic inspection of all calyces identifies stones and other abnormalities. Laser lithotripsy fragments stones, with the settings adjusted based on stone hardness and size. Stone fragments are retrieved using baskets or graspers when feasible. The procedure duration varies depending on stone burden and complexity. Continuous irrigation maintains clear visualisation throughout the procedure.

Immediate Post-Treatment

After the procedure, you’ll recover in the post-anaesthesia care unit where vital signs are monitored. Patients may experience mild discomfort and possibly blood-tinged urine, both of which are normal. A ureteral stent is usually placed to help with proper drainage and prevent obstruction from stone fragments or swelling.

Pain medication is provided as needed. Patients can typically drink fluids once fully awake and may eat if tolerated. Many RIRS patients go home the same day, though some may require overnight observation. Discharge instructions include medication schedules, activity guidelines, and warning signs to monitor.

Recovery & Aftercare

First 24-48 Hours

Rest is essential during the initial recovery period, though complete bed rest isn’t necessary. Drink plenty of water to help flush out stone fragments and maintain good urine flow. Mild pain or discomfort may occur and can be managed with prescribed pain medication. Blood in the urine is expected and should gradually improve. The ureteral stent may cause urgency, frequency, or discomfort during urination. Avoid strenuous activities, heavy lifting, and vigorous exercise. Take prescribed antibiotics as directed to prevent infection. Monitor for fever, severe pain, or inability to urinate, which require immediate medical attention.

First Week

Continue high fluid intake to facilitate the passage of stone fragments. Gradually increase activity levels as tolerated, though avoid intense physical activities. Strain urine if instructed to collect stone fragments for analysis. Stent-related symptoms typically persist but may be manageable with medication. Return-to-work timing varies by individual and job requirements. Follow-up appointments are scheduled to check progress and plan stent removal. Continue medications as prescribed, including alpha-blockers if given to help stone passage.

Long-term Recovery

Complete stone clearance may take several weeks as small fragments pass naturally. The ureteral stent is typically removed via a simple cystoscopy. After stent removal, symptoms usually resolve. Follow-up imaging confirms stone clearance. Metabolic evaluation may be recommended to identify risk factors for stone formation. Dietary modifications and preventive medications might be prescribed based on stone analysis. Regular monitoring helps detect stone recurrence early.

Dr Azhari provides post-procedure support for recovery.

Schedule your consultation to learn more about what to expect.

Benefits of Retrograde Intra Renal Surgery (RIRS)

Retrograde Intra Renal Surgery (RIRS) may offer advantages for treating kidney stones and upper urinary tract conditions. The minimally invasive nature means no external incisions, which can result in less post-operative pain and reduced risk of wound complications. Recovery time may be shorter compared to open surgery, with patients potentially resuming normal activities within days to weeks.

The procedure provides access to all parts of the kidney, including areas that may be difficult to reach with other treatments.

RIRS can achieve stone clearance, particularly for smaller stones, and may be completed in a single procedure. The ability to treat multiple stones simultaneously may reduce the need for repeat interventions. The procedure aims to preserve kidney function. Patients may experience minimal blood loss and a lower risk of infection than with percutaneous procedures. The outpatient nature of RIRS procedures can mean less disruption to daily life.

The procedure’s diagnostic capability allows simultaneous evaluation and treatment of other upper tract abnormalities. For patients with recurrent stones, RIRS can be safely repeated when necessary. The technique may be valuable for patients with bleeding disorders or obesity, where other approaches may carry higher risks.

Risks & Potential Complications

Common Side Effects

Patients may experience temporary blood in the urine (hematuria) that typically resolves within days. Stent-related discomfort can occur, including urinary urgency, frequency, and flank discomfort during urination. These symptoms are manageable with medication and resolve after stent removal. Mild pain or cramping in the kidney area may persist for several days. Some patients experience temporary urinary burning or irritation. Small residual stone fragments may cause discomfort as they pass over the course of several weeks. These effects are generally well-tolerated and don’t require intervention beyond symptom management.

Rare Complications

Potential complications include urinary tract infection despite antibiotic prophylaxis. Ureteral injury or perforation may occur. Bleeding requiring transfusion is possible. Ureteral stricture formation may develop and is usually manageable with endoscopic treatment. Failure to remove all stone fragments may necessitate repeat procedures. Sepsis, though rare with proper preparation, requires immediate treatment if it occurs.

These risks are minimised through careful patient selection, meticulous surgical technique, appropriate antibiotic prophylaxis, and proper post-operative care. Choosing an experienced urologist familiar with RIRS can help reduce complication rates.

Cost Considerations

The cost of RIRS in Singapore varies based on several factors, including stone size and number, procedure complexity, hospital facility type, and whether overnight admission is required. The total cost typically includes the urologist’s fees, anaesthesia charges, operating theatre time, equipment and consumables (including laser fibres), pre-operative investigations, medications, and follow-up care, including stent removal.

Whilst RIRS may have higher upfront costs than some alternatives, such as shock wave lithotripsy, its minimally invasive nature can translate into shorter recovery times and a faster return to work. Quality of care and urologist experience should be primary considerations, as appropriate treatment can help prevent complications and the need for repeat interventions. A detailed consultation provides personalised information based on your specific condition and treatment requirements.

Frequently Asked Questions

How long does RIRS surgery take to perform?

RIRS may take approximately 60-90 minutes to complete, though the duration can vary depending on factors such as stone size, number, and location within the kidney. Complex cases with multiple stones or challenging anatomy may require more time. The entire hospital visit, including preparation and recovery, may span several hours for day surgery patients. Your urologist may provide a time estimate based on your specific condition during the consultation.

Is RIRS painful, and what anaesthesia is used?

RIRS is typically performed under general anaesthesia for patient comfort during the procedure. Some cases may use spinal anaesthesia based on patient factors and preferences. Postoperatively, patients may experience mild to moderate discomfort. This can be managed with oral pain medications. The stent may cause some discomfort until removal, but this can be managed with prescribed medications, including alpha-blockers and anti-inflammatories.

What is the success rate of RIRS for kidney stones?

RIRS aims to achieve stone clearance, with outcomes varying based on stone size, location, composition, and kidney anatomy. Lower-pole stones and harder stones may have different clearance rates. For larger stones, staged procedures may be considered. Your urologist can discuss expected outcomes based on your specific stone characteristics.

How soon can I return to work after RIRS?

Patients with desk jobs may be able to return to work within a few days after RIRS. Those with physically demanding occupations may need 1-2 weeks to resume full duties. A ureteral stent may cause some discomfort, but it usually doesn’t prevent light activities. After stent removal (typically 1-2 weeks post-procedure), any remaining restrictions may be lifted. Your recovery timeline depends on your overall health and job requirements.

Will I need a stent after RIRS, and for how long?

RIRS procedures may involve placing a temporary ureteral stent to help with proper kidney drainage and prevent obstruction from swelling or stone fragments. The stent may remain for 1-2 weeks, though duration varies based on the extent and individual factors. Stent removal is typically a quick outpatient procedure done via cystoscopy. Some cases may not require stenting, which your urologist can determine during the procedure.

Can kidney stones come back after RIRS?

While RIRS aims to treat existing stones, it doesn’t prevent new stone formation. Stone recurrence can occur without preventive measures. However, proper metabolic evaluation, dietary modifications, increased fluid intake, and, sometimes, preventive medications may help reduce the risk of recurrence. Regular follow-up and monitoring can help detect new stones early, when they may be easier to treat.

What size kidney stones can be treated with RIRS?

RIRS may be suitable for stones up to 2 cm in size, with good outcomes often achieved for stones between 1 and 1.5 cm. Larger stones may be treated but could require staged procedures or a combination with other techniques. Stone location is as important as size – RIRS can be effective for treating lower pole stones and those in challenging anatomical positions where other treatments may be less suitable. Your urologist can assess whether RIRS is appropriate based on your stone characteristics.

Are there alternatives to RIRS for kidney stone treatment?

Several alternatives exist depending on stone characteristics. Extracorporeal shock wave lithotripsy is non-invasive but may be less effective for larger or more complex stones. Percutaneous nephrolithotomy may be considered for huge stones, but it is more invasive. Medical management may help dissolve certain stone types. Observation may be appropriate for small, asymptomatic stones. Your urologist can discuss which option is most suitable for your specific situation, taking into account stone factors, anatomy, and your preferences.

Conclusion

RIRS represents an advancement in kidney stone management, offering patients in Singapore a minimally invasive option. This procedure combines diagnostic precision with therapeutic capability, allowing treatment of kidney stones whilst aiming to reduce recovery time and discomfort. RIRS can be effective for managing stones, particularly smaller ones, and provides access to various areas of the kidney, making it a treatment option for many patients. With appropriate patient selection and experienced surgical care, RIRS aims to achieve a balance between safety and patient comfort in the management of kidney stones and other upper urinary tract conditions.

Ready to Take the Next Step?

If you’re considering RIRS for kidney stone treatment, Dr Azhari can help you determine whether it’s suitable for your needs. With experience in RIRS procedures, we provide personalised care throughout your journey.

Dr. Nor Azhari Bin Mohd Zam

Dr. Nor Azhari Bin Mohd Zam

MBBS (NUS)|MRCS (Edin.)|MMed Surgery (NUS)|FAMS (Urology)

Former Director of Endourology (Urinary stone service) Singapore General Hospital 2016 to 2023

With more than 20 years experience as a certified Urologist, Dr Nor Azhari specializes in treating a wide range of kidney, bladder and prostate conditions as well as disorders of the male reproductive organs. He offers minimally invasive treatment options and provides same-day appointments for convenience.

  • Skilled urologist and kidney stone surgeon
  • Recognized with the College of Surgeons Gold Medal and Singapore Urological Association Book prize
  • Minimally invasive treatment options available (non-invasive and endoscopic/key-hole techniques)

Make an Enquiry

For urgent or same day appointment requests, please call our hotline.

    Full Name*

    Email Address*

    Phone Number*

    Your Message*

    For Faster Response, call us!

    +65‎ 6334‎ 1486

    Our Clinic Locations

    Asian Healthcare Specialists (Novena)

    Mount Elizabeth Novena Specialist Centre
    38 Irrawaddy Road
    #08-41 Singapore 329563

    Asian Healthcare Specialists (Alvernia)

    Mount Alvernia Hospital
    820 Thomson Road Medical Centre Block A #05-03 Singapore 574623

    Seraphinite AcceleratorOptimized by Seraphinite Accelerator
    Turns on site high speed to be attractive for people and search engines.