Management of Ureteric Stones in Young Adults with Hypertension

Diagnosis and Initial Investigations

Non-contrast CT scan is the gold standard for diagnosing ureteric stones, providing accurate stone size, location, and degree of obstruction 1
Low-dose CT protocols should be used following ALARA principles to minimize radiation exposure, particularly important in young adults 2, 3
Ultrasound can assess for hydronephrosis but is inferior for determining exact stone size and location 4
Urinalysis is mandatory before any intervention to detect infection, which if present requires antibiotic therapy before stone manipulation to prevent urosepsis 5, 1
Serum creatinine and eGFR to assess renal function, especially critical given the hypertension 6
In young adults diagnosed with hypertension before age 40, comprehensive screening for secondary hypertension causes is recommended 6

Initial conservative management with observation and medical expulsive therapy is appropriate for stones ≤10 mm 1, 4
Alpha-blockers (tamsulosin) increase stone passage rates by 29% compared to placebo, with distal ureteral stones <10 mm achieving 77.3% stone-free rates versus 54.4% with placebo 1
Maximum observation period is 6 weeks from initial presentation to prevent irreversible kidney injury 4
NSAIDs are first-line analgesics for renal colic; opioids only if NSAIDs contraindicated or insufficient 1
Ureteroscopy (URS) is first-line therapy for stones >10 mm, with stone-free rates: 95% for stones <10 mm, 78% for stones >10 mm 2, 3
Shock wave lithotripsy (SWL) is an alternative for stones >10 mm, with stone-free rates: 87% for stones <10 mm, 73% for stones >10 mm 2, 3

Target systolic BP: 120-129 mmHg if well tolerated 6
Initial therapy: ACE inhibitor (lisinopril 10 mg daily) or ARB as first-line for young adults 6
If BP not controlled with single agent, add dihydropyridine calcium channel blocker (amlodipine) 6
Thiazide diuretics have dual benefit: effective for BP control and reduce urinary calcium excretion, preventing recurrent calcium stone formation 6, 7

Infected obstructed kidney (pyonephrosis) requires emergency decompression within hours 5
Ureteroscopy is preferred over SWL because of higher single-procedure stone-free rates, better for mid-ureteral stones, and allows direct visualization and stone analysis 1, 2, 3, 5
SWL may be considered if stone <10 mm in proximal ureter, patient preference for less invasive approach, or anatomical factors favor SWL 2, 5

Stent placement after URS is not routine but may be needed if significant ureteral trauma, residual fragments, or edema present 2
Monitor for complications: fever (sepsis), hematuria, flank pain 5, 1
Ensure adequate hydration 7
Obtain 24-hour urine collection 6 months after stone episode to assess calcium, oxalate, uric acid, citrate, volume, and pH 7
Dietary modifications: increase fluid intake, limit sodium, moderate animal protein intake, and maintain normal calcium intake 7
Pharmacological prevention based on stone composition: thiazide diuretics for calcium oxalate stones with hypercalciuria, potassium citrate for calcium oxalate stones with hypocitraturia, and potassium citrate to alkalinize urine to pH 6.0 for uric acid stones 7

Never perform blind basket extraction without endoscopic visualization - high risk of ureteral injury 5
Avoid prolonged conservative management beyond 6 weeks - risks irreversible kidney damage 4
Never ignore fever in stone patient - infected obstructed kidney is urological emergency requiring immediate decompression 5, 1
Do not restrict dietary calcium - counterintuitively increases stone risk by increasing intestinal oxalate absorption 7
Avoid combining two RAS blockers (ACE inhibitor + ARB) - not recommended for hypertension management 6