Clinical Scorecard: Comparison of Enhanced and Extended Preoperative Antibiotic Prophylaxis for Retrograde Intrarenal Surgery in Patients at High Risk for Infections: A Randomized Controlled Study

At a Glance

Key Highlights

• RIRS is effective for upper urinary tract stones but carries risk of postoperative infections ranging from UTI to urosepsis.
• High-risk factors for infection include asymptomatic bacteriuria, indwelling ureteral stent >4 weeks, diabetes mellitus, and intraoperative factors like prolonged surgery.
• This randomized controlled trial compared 2-day (Enhanced) versus 7-day (Extended) preoperative antibiotic prophylaxis in high-risk patients undergoing RIRS.

Guideline-Based Recommendations

Diagnosis

• Preoperative assessment including urine analysis, urine culture, serum creatinine, blood sugar, and imaging (CT-KUB) to identify infection risk and stone characteristics.

Management

• Administer preoperative antibiotic prophylaxis tailored to urine culture results or institutional protocols (TMP-SMX preferred).
• Use 2-day or 7-day antibiotic regimens prior to RIRS in high-risk patients.
• Select antibiotics based on susceptibility and patient tolerability; alternatives include Nitrofurantoin, Ciprofloxacin, or Cefpodoxime.

Monitoring & Follow-up

• Postoperative overnight hospital observation for infectious signs.
• Monitor symptoms and perform urine analysis, culture, CBC, CRP, and blood cultures if febrile.
• Follow-up CT-KUB at 4 weeks to assess stone-free status.

Risks

• Balance between adequate infection eradication and risks of antimicrobial adverse events and resistance.
• Potential postoperative infectious complications graded by EAU Infection Severity Scale from cystitis to uroseptic shock.

Patient & Prescribing Data

Adults ≥18 years with renal stones ≤20 mm undergoing RIRS and at high risk for infection (ASB, prolonged stent, DM).

Both 2-day and 7-day preoperative antibiotic prophylaxis regimens are used; choice depends on balancing infection prevention and antibiotic stewardship.

Clinical Best Practices

• Identify high-risk patients preoperatively via clinical and laboratory criteria.
• Tailor antibiotic prophylaxis based on urine culture and institutional stewardship guidelines.
• Maintain blinded assessment of outcomes to reduce bias in clinical trials.
• Use expert endourologists and standardized surgical techniques including ureteral access sheath and flexible ureteroscope.
• Ensure postoperative monitoring and timely intervention for infectious complications.

References

• EAU Guidelines on Urological Infections
• Institutional Antibiotic Stewardship Program