First-Line Treatment of Kidney Stones

Acute Pain Management

The European Association of Urology recommends NSAIDs (diclofenac, ibuprofen, or metamizole) as the first-line treatment for acute renal colic, as they are superior to opioids for renal colic pain control, reducing the need for additional analgesia while minimizing side effects 1
The European Association of Urology suggests using the lowest effective dose of NSAIDs to minimize cardiovascular and gastrointestinal risks 1
Exercise caution with NSAIDs in patients with reduced glomerular filtration rate as they may impact renal function, according to the European Association of Urology 1
Opioids (hydromorphine, pentazocine, or tramadol) should be reserved as second-line agents, and pethidine should be avoided due to high vomiting rates, as recommended by the European Association of Urology 1

For ureteral stones ≤10mm without complications, observation with medical expulsive therapy is appropriate, according to the American Urological Association 2, 3
Alpha-blockers provide the greatest benefit for stones >5mm in the distal ureter, with a strong recommendation from the European Association of Urology 1
Conservative management requires well-controlled pain, absence of sepsis, and adequate renal functional reserve, as stated by the American Urological Association 3
The maximum duration of conservative treatment should be 4-6 weeks from initial presentation, according to the American Urological Association 2
Mandatory periodic imaging is required to monitor stone position and assess for hydronephrosis, as recommended by the American Urological Association 3

For distal ureteral stones >10mm, ureteroscopy is the first-line surgical treatment, according to the American Urological Association 2
For distal stones <10mm, both ureteroscopy and shock wave lithotripsy are acceptable options, as stated by the American Urological Association 2
Ureteroscopy yields significantly higher stone-free rates compared to shock wave lithotripsy, but has slightly higher complication rates, according to the European Association of Urology 4

In cases of sepsis and/or anuria with obstructed kidney, urgent decompression via percutaneous nephrostomy or ureteral stenting is mandatory, as recommended by the European Association of Urology 1
Delay definitive stone treatment until sepsis is resolved, according to the European Association of Urology 1
Collect urine for antibiogram testing before and after decompression, as stated by the European Association of Urology 1
Administer antibiotics immediately and adjust based on culture results, according to the European Association of Urology 1

For uric acid stones, oral chemolysis with alkalinization using citrate or sodium bicarbonate is strongly recommended, with a target pH 7.0-7.2, as stated by the European Association of Urology 1
Patients should monitor urine pH and adjust medication accordingly, according to the European Association of Urology 1
The success rate of oral chemolysis is approximately 80.5%, with 15.7% requiring further intervention, as reported by the European Association of Urology 1

Do not use routine stenting before shock wave lithotripsy, as it provides no benefit and causes frequent stent-related symptoms, according to the American Urological Association 3
Do not offer prolonged conservative management beyond 6 weeks without reassessment, as recommended by the American Urological Association 2
Avoid using NSAIDs in patients with significantly reduced renal function without careful monitoring, according to the European Association of Urology 1