This is a single-center randomized controlled trial in comparison of Parylene-Coated versus Silicone Catheters in the Prevention of Urinary Tract Infections and Crystallization.

This study was a single-center randomized controlled trial, enrolling patients with indwelling urinary catheterization time greater than 2 weeks, and comparing the incidence of urinary tract infections in the two groups with different indwelling urinary catheter times by retaining mid-stream urine specimens for bacterial cultures on the 3rd, 7th, 10th, and 14th days after urinary catheter placement. And after removal of the urinary catheter,1-cm sections were taken from the head end and center of each urinary catheter, and the crystal deposition inside the catheter was observed using a scanning electron microscope. The incidence of urinary tract infections and crystal deposition on the inner wall of the catheter were compared between the patients in the matte catheter group (Parylene-coated) and the patients in the glossy catheter group (plain silicone) during the period of catheterization, so as to evaluate the effectiveness of the two types of catheters in the clinical application.

Inclusion Criteria:

1. age greater than 18 years;
2. indwelling urinary catheter for ≥14 days;
3. fully understand the clinical trial protocol and sign the informed consent;

Exclusion Criteria:

1. patients with confirmed urinary tract infection before indwelling urinary catheter;
2. those with renal dysfunction;
3. those who are allergic to silicone or silicone material;
4. those with low immunity susceptible to infection;
5. those who have participated in other clinical trials within 3 months;
6. others who are judged by the investigator to be unsuitable for clinical trials;

Once available, the results of this trial will be disseminated to an international peer-reviewed journal and presentations at international or national academic conferences. The data will be made available upon request to researchers a) who provide a methodologically sound proposal and b) whose proposed use of the data has been approved by an independent ethical review committee.

Data will become available after publication with no end date

The participant, the investigator and the outcomes assessor were all masked. Only the care provider who performed the anaesthesia were not blinded but they were not involved in the subsequent prostate biopsy, pain assessment, data collection and data analysis.