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Improving clean-catch contamination rates: A prospective interventional cohort study

Sharon Teo, John A Cheek, Simon Craig
Emergency Medicine Australasia: EMA 2016, 28 (6): 698-703
27778452

OBJECTIVES: The clean-catch method of urine collection carries a high contamination rate. This study aims to evaluate the effects on contamination rate of providing a parent handout and pre-made urine collection pack for clean-catch urine collection.

METHODS: We conducted a single-centre prospective cohort interventional study in a tertiary paediatric ED. All children younger than 24 months who presented from April 2013 to June 2014 requiring a urine sample to be obtained were included. The intervention was provision of a pre-made urine collection pack including a standardised information handout. The primary outcome measure was the difference in proportion of urine contamination in samples obtained via a clean-catch pre- and post-intervention.

RESULTS: The total number of urine specimens included was 288 in the pre-intervention group and 333 in the post-intervention group. Contamination rates were 14.9% in the pre-intervention group and 11.4% in the post-intervention group. There was no statistically significant reduction in contamination (P = 0.19). The contamination rates appeared to be associated with gender, with (pooled) female contamination rates being 16.4% (44/269) and male contamination rates being 10.5% (37/352). Most specimens of urine were collected via the clean-catch method (81.2%), followed by catheter urine specimen (13.7%) and suprapubic aspirate (5.1%). The contamination rate in our study for clean-catch urine collectively was 13%, catheter urine specimen 3.8% and suprapubic aspirate 0%.

CONCLUSION: The contamination rate of clean-catch urine did not improve with the implementation of a pre-made urine collection pack including standardised written instructions.

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