Urinary Catheter 'Fill and Flush' Valve: Safety, Effectiveness, Acceptability and Feasibility Trial

"The fill and flush valve (Figure 1) is an automated valve which is designed to open in response to rising bladder pressure which occurs as the bladder becomes full. The valve is situated between the IDC and the drainage bag as a manual valve would be.~There are three variants of the valve which respond to different degrees of bladder pressure. People's bladders function at different pressure levels. One of the aims of this study is to gain preliminary data on which valve variant works and under which circumstances. Pressure ranges are as follows:~Low: 22 - 49cm H2O Medium: 35 - 61cm H2O High: 53 - 79cm H2O"