In a hospital setting, the self-measurement of intravesical pressure (SMIP) assessment will be conducted at full and empty bladder using the Peritron+ and a ruler-based manometry method. In the home setting a human factor/usability study will be conducted to measure the subject's ability to perform a successful SMIP assessment at full and empty bladder with the Peritron+. This study involves the use of the Peritron+, Air-Trap Tubing, a ruler and a clean intermittent catheter (CIC).