Objectives: Multiple sclerosis (MS) causes neurologic symptoms to change over time. Voiding dysfunction is common in patients with MS, and few studies have examined the changes in urodynamic patterns in these patients over time. The purpose of this study was to examine the frequency and nature of urodynamic pattern changes in patients with MS who underwent two or more urodynamic studies.
Methods: Twenty-two patients (7 men and 15 women) with well-documented MS were referred to one urologist (T.B.B.) for evaluation of lower urinary tract symptoms. All patients had undergone two or more urodynamic evaluations during a 14-year period for persistent or new symptoms, and a retrospective comparison was made among the urodynamic test results.
Results: Overall, 12 (55%) of 22 patients experienced a change in their urodynamic patterns and/or compliance during a mean follow-up interval of 42 +/- 45 months between the urodynamic studies. Most patients initially had urodynamic patterns showing detrusor hyperreflexia, detrusor external sphincter dyssynergia, or detrusor hypocontractility. Fourteen (64%) of the 22 patients studied had the same or worsening of the same symptoms and 8 (36%) of 22 had new urologic symptoms. Six (43%) of 14 patients with no new symptoms and 6 (75%) of 8 with new symptoms had significant changes found with follow-up urodynamic testing.
Conclusions: A significant proportion of patients with MS with and without new urinary symptoms will develop changes in their underlying urodynamic patterns and detrusor compliance. Therefore, urodynamic evaluations should be repeated at regular intervals in symptomatic patients to optimize clinical management, reduce complications, and better enable these patients to manage their neurogenic bladder dysfunction.
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