Stents are tubes placed between the kidney and the bladder which prevent blockages which might otherwise damage the kidney. Introducing foreign material into this system allows a platform for bacteria to exist and which will potentially cause infections. These are very common. We propose modifying the surfaces of the materials used in stents to make them “non-stick” to prevent bacteria attaching and then causing infections. We can test this in the laboratory and wish to test different types of material under different conditions which mimic the clinical environment.