Does Post-Void Residual Volume Predict Worsening Urological Symptoms in Patients with Multiple Sclerosis?

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Purpose:Our goal was to examine how post-void residual urine volume relates to urinary symptoms in patients with multiple sclerosis.Materials and Methods:We retrospectively reviewed the records of patients with multiple sclerosis who had lower urinary tract symptoms and presented to a tertiary neurourology clinic. Patients for whom post-void residual volume was recorded at the initial urological assessment were included in our analysis. Results of the AUA (American Urological Association) SI (Symptom Index) and the M-ISI (Michigan Incontinence Symptom Index) completed at this visit were analyzed to assess the severity of lower urinary tract symptoms and incontinence. A chart review was performed to obtain information on demographics and documented urinary tract infections.Results:Between 2014 and 2017, 110 patients diagnosed with multiple sclerosis underwent post-void residual volume measurement at our clinic. Average post-void residual volume was 123.4 cc (range 0 to 650 cc). The mean AUA symptom score was 19.1 with an average bother score of 4.1. Analysis of post-void residual volume as a continuous variable did not show an association between increasing post-void residual volume and an increasing AUA SI or bother score (p = 0.53 and 0.44, respectively). When evaluated by post-void residual volume tertile, no relationship was found between post-void residual volume, and the AUA SI and the M-ISI (p = 0.54 and 0.57, respectively). No correlation was also found between increasing post-void residual volume and a recent history of recurrent urinary tract infections (p = 0.27).Conclusions:Post-void residual volume was not associated with worsening obstructive lower urinary tract symptoms as assessed by the AUA SI, worsening incontinence as measured by the M-ISI score or an increased risk of recurrent urinary tract infections in select patients with multiple sclerosis and lower urinary tract symptoms.

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