Urine sampling in ambulatory women: midstream clean-catch versus catheterization

Area of Science:

• Urology
• Infectious Diseases
• Clinical Diagnostics

Background:

• Urinary tract infections (UTIs) are common, necessitating accurate diagnostic methods.
• Midstream clean-catch (MSCC) and catheterization (CATH) are common urine collection techniques.
• Comparing the diagnostic accuracy of MSCC versus CATH is crucial for clinical practice.

Purpose of the Study:

• To evaluate significant differences between MSCC and CATH urine sampling.
• To compare urinalysis and urine culture results from both methods.
• To determine the reliability of MSCC for UTI diagnosis.

Main Methods:

• Prospective study involving 105 women with suspected UTIs.
• Sequential collection of MSCC and CATH urine samples from each participant.
• Analysis of samples for urine culture, leukocyte esterase, nitrites, microscopic bacteriuria, and pyuria.

Main Results:

• High concordance rates observed between MSCC and CATH: 96% for cultures, 94% for nitrites, 93% for leukocyte esterase, 90% for bacteriuria, and 90% for pyuria.
• No statistically significant differences in sensitivity, specificity, or predictive values between the two methods.
• 40% of patients had culture-proven UTIs.

Conclusions:

• Properly performed MSCC is a valid and reliable method for urine sample collection in women with suspected UTIs.
• MSCC offers comparable diagnostic accuracy to CATH, simplifying the diagnostic process.
• The findings support the routine use of MSCC in ambulatory settings for UTI evaluation.