To assess if a bacteriophobic coating prevents biofilm and host protein accumulation on urinary catheters and inflammatory protein release in urine following catheterization

The purpose of the study is to provide pilot information on the characteristics of the biofilm formed on the coated catheter compared to a standard catheter. The two objectives are;

1. to evaluate the catheter's on-label performance in customary clinical use.
2. to quantify biofilm formation on the catheter surface, and to compare it with biofilm formation on the hospitals current uncoated catheters.

Inclusion Criteria:

1. All patients undergoing colorectal resection routinely requiring a urinary catheter as part of their standard post-operative care.
2. Patients aged 18-85 years will be eligible for the study.
3. Able to give informed consent.

Exclusion Criteria:

1. Patients that have or recently (within 3 weeks) had a urinary catheter, or those with signs of current urinary tract infection.
2. Pregnant patients.
3. Patients with a potentially immunocompromised condition (steroids, HIV)
4. Patients who are unable to give informed consent