[Prophylactic oral antibiotics in urethral instrumentation]

Area of Science:

• Urology
• Infectious Diseases
• Clinical Pharmacology

Background:

• Urinary tract infections (UTIs) are a potential complication following urethral manipulations.
• Understanding the incidence and risk factors for these infections is crucial for patient care.

Purpose of the Study:

• To evaluate the incidence of UTIs after urethral manipulations.
• To assess the efficacy of prophylactic antimicrobial medication in preventing these infections.
• To identify specific procedures and patient factors associated with increased infection risk.

Main Methods:

• A prospective study involving 1,249 patients undergoing urethral manipulations between July 1990 and December 1992.
• Comparison of infection rates between patients receiving 3-day prophylactic antimicrobial medication and those who did not.
• Analysis of infection incidence based on procedure type (urethral dilation, retrograde urethrography, cystoscopy) and patient demographics (age, sex).

Main Results:

• Overall infection incidence was 1.7% (21/1,249) in patients without prior urinary infection.
• Prophylactic antimicrobials reduced infection rates significantly (0.6% vs. 3.5%, P = 0.0004).
• Cystoscopic examinations showed a higher risk, particularly in elderly males. *Pseudomonas aeruginosa* was the most problematic pathogen.

Conclusions:

• A 3-day prophylactic antimicrobial regimen is effective in reducing UTIs post-urethral manipulation.
• Cystoscopy poses a higher risk for infection compared to other procedures studied.
• Elderly patients and specific pathogens like *P. aeruginosa* warrant attention in infection prevention strategies.