Optimizing the Yield of In-and-Out Urinary Catheter Cultures by Applying a "Midstream-Like" Approach in Pediatric...

Area of Science:

• Urology
• Infectious Diseases
• Clinical Microbiology

Background:

• Urinary catheterization is prone to sample contamination, leading to inaccurate results.
• False-positive and mixed-culture interpretations complicate diagnosis and treatment.

Purpose of the Study:

• To reduce sample contamination during urinary catheterization.
• To improve the diagnostic accuracy of urine cultures obtained via catheterization.
• To minimize unnecessary antibiotic prescriptions.

Main Methods:

• Implementation of a "midstream-like" catheterization technique.
• Culturing of both first- and second-voided urine fractions post-catheterization.
• Comparison of contamination rates and diagnostic alignment between fractions.

Main Results:

• The second-voided urine fraction showed significantly fewer contaminants.
• Mixed-culture interpretations were reduced in the second fraction.
• Second-fraction cultures demonstrated better alignment with pyuria, indicating higher accuracy.

Conclusions:

• The "midstream-like" catheterization technique with second-fraction culturing enhances diagnostic accuracy.
• This method reduces false positives and mixed cultures, preventing clinical misdiagnosis.
• Improved accuracy minimizes the risk of unwarranted antibiotic use in catheterized patients.