What is the recommended treatment for a 69-year-old female with colicky flank pain and a non‑obstructing 9.7 × 6.8 mm stone in the upper pole of the kidney?

Recommended Treatment

For this 69-year-old female with a non-obstructing 9.7 mm upper pole kidney stone causing colicky pain, you should offer either ureteroscopy (URS) or extracorporeal shockwave lithotripsy (ESWL) as surgical treatment options, with URS likely providing higher stone-free rates in a single procedure. 1, 2

Initial Management Approach

Pain Control

• Administer NSAIDs as first-line analgesia for the colicky pain (they reduce need for additional analgesia compared to opioids)
• Use opioids (hydromorphine, pentazocine, or tramadol—NOT pethidine) only as second-line if NSAIDs are insufficient or contraindicated
• Consider cardiovascular and gastrointestinal risks with NSAIDs, particularly in this 69-year-old patient, and use the lowest effective dose 2

Pre-Treatment Evaluation

Before proceeding with surgical intervention:

• Obtain urine microscopy and culture to exclude or treat any UTI before stone removal
• Ensure no contraindications exist (pregnancy not applicable here, but check for bleeding disorders, uncontrolled infection, severe obesity, or arterial aneurysm near the stone) 2

Surgical Treatment Options

Why Surgery is Indicated

At 9.7 mm, this stone is:

• Unlikely to pass spontaneously (stones >6 mm have poor spontaneous passage rates)
• Causing symptomatic colicky pain
• Large enough to warrant active intervention rather than conservative management 3, 4

Option 1: Ureteroscopy (URS)

Advantages:

• Higher stone-free rates in a single procedure compared to ESWL for kidney stones of this size
• Flexible URS can access upper pole location effectively
• Lower risk bleeding procedure (classified as low-risk)
• Complete stone removal is the goal 1, 2

Considerations:

• Requires general anesthesia
• May require ureteral stenting post-procedure if there is trauma, residual fragments, bleeding, or perforation (though routine post-URS stenting is unnecessary after uncomplicated procedures)
• Ho:YAG laser is the gold standard for lithotripsy during URS 2

Option 2: Extracorporeal Shockwave Lithotripsy (ESWL)

Advantages:

• Less invasive than URS
• Can be performed with appropriate precautions even in patients with pacemakers/defibrillators
• Fewer overall complications than percutaneous approaches 2

Disadvantages:

• Lower stone-free rates compared to URS, particularly for upper pole stones
• May require multiple sessions
• Higher risk bleeding procedure (classified as high-risk)
• Contraindicated if bleeding disorders present 2

Best practice if ESWL chosen:

• Initiate treatment with low energy shockwaves and gradually increase energy during the session to reduce bleeding risk
• Decrease frequency from 120 to 60-90 shockwaves/min to improve stone-free rates and reduce tissue damage
• Use stepwise energy ramping to minimize renal injury 1, 2

Important Clinical Nuances

Upper Pole Location Matters

Upper pole stones (as in this case) are more likely to become symptomatic and pass spontaneously compared to lower pole stones (40.6% vs 24.3% symptom rate; 14.5% vs 2.9% spontaneous passage rate) 5. This supports active treatment given she's already symptomatic.

Stone Size at 9.7 mm

This size falls into a zone where:

• Conservative management with observation is generally not appropriate given symptoms
• Both URS and ESWL are reasonable options per guidelines
• PCNL (percutaneous nephrolithotomy) is typically reserved for stones >2 cm 1

Perioperative Antibiotic Prophylaxis

• Administer single dose of prophylactic antibiotic before the procedure
• Tailor antibiotic choice to institutional/regional antimicrobial susceptibility patterns 2

Post-Treatment Follow-Up

After successful stone removal:

• This patient should undergo metabolic evaluation given she's at risk for recurrence (symptomatic stone requiring intervention)
• Recommend increased fluid intake as lifestyle modification
• Consider thiazide diuretics, allopurinol, or citrates for prevention of recurrent calcium stones based on metabolic workup 3, 6
• Periodic imaging for surveillance if indicated 1

Common Pitfalls to Avoid

1. Don't delay treatment with prolonged observation—at 9.7 mm with symptoms, spontaneous passage is unlikely
2. Don't use pethidine for pain control—it has higher vomiting rates and greater likelihood of requiring additional analgesia 2
3. Don't perform routine stenting before ESWL (doesn't improve stone-free rates) or after uncomplicated URS (increases morbidity) 2
4. Don't forget to screen for stone recurrence risk and provide metabolic evaluation—this is a high-risk patient who will benefit from preventive measures 6