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Antimuscarinic effects on current perception threshold: A prospective placebo control study
Author(s) -
Vijaya Gopalan,
Digesu G. Alessandro,
Derpapas Alexandros,
Hendricken Caroline,
Fernando Ruwan,
Khullar Vik
Publication year - 2012
Publication title -
neurourology and urodynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.918
H-Index - 90
eISSN - 1520-6777
pISSN - 0733-2467
DOI - 10.1002/nau.21194
Subject(s) - medicine , tolterodine , placebo , overactive bladder , urology , statistical significance , afferent , stimulation , wilcoxon signed rank test , urethra , anesthesia , mann–whitney u test , alternative medicine , pathology
Aims To evaluate the effect of Tolterodine on urethral and bladder afferent nerves in women with detrusor overactivity (DO) in comparison to placebo, by studying the changes in the current perception threshold (CPT). Methods Women with overactive bladder symptoms and idiopathic DO were recruited and randomized in a double‐blind manner between placebo and tolterodine extended release. All women underwent CPT testing of the bladder and urethra using a Neurometer constant current stimulator. CPT values were determined at three frequencies, including 2,000 Hz (corresponding to Aβ‐fibers), 250 Hz (corresponding to Aδ‐fibers), and 5 Hz (corresponding to C fibers) before and 7 days on treatment. CPT values before and on treatment were compared using a Wilcoxon Signed Rank test. Results Twenty women (mean age 46 years) were studied. There was no statistical difference between the two groups in terms of age, ethnicity, severity of symptoms and pre‐treatment CPT values. Only in the tolterodine group there was a significantly increased CPT value at 5 and 250 Hz upon both urethral and bladder stimulation after 1 week of treatment. When compared with placebo, women taking tolterodine had significantly increased Bladder CPT values at 5 Hz ( P ‐value <0.05). The electrical stimulation with 5 Hz was described as urgency. Conclusions This is a randomized placebo control study evaluating the effect of antimuscarinics on sensory nerve function in women with DO. Our results support the animal studies that antimuscarinics have an effect on sensory function. Neurourol. Urodynam. 31:75–79, 2012. © 2011 Wiley Periodicals, Inc.