Abstract
To compare the efficacy and safety of different frequency - 1 and 5 Hz - modes of sacral MS in patients with symptoms of OAB. A single blind prospective randomized comparative clinical study included 59 patients with OAB symptoms. The patients were divided by simple randomization into the group 1 (n=30), which received MS 3 times a week for 5 weeks with a frequency of 1 Hz per sacral root area (S2-S4), and the group 2 (n=29), in which stimulation was performed at a frequency of 5 Hz, while the remaining parameters and duration of therapy were identical to group 1. Sacral pMS with different frequency modes (1 and 5 Hz) is reliably equally effective against the clinical symptoms of OAB, which is confirmed by the absence of significant intergroup differences. In patients receiving MS with a frequency of 5 Hz, there was a more pronounced increase in maximum cystometric capacity, normalization of the maximum and average urine flow velocity and regression of the residual urine volume (p<0.001, p=0.007, p=0.011 and p=0.012 compared with group 1). The greatest difference in indicators was observed in the increase in the maximum cystometric capacity - +31±25 ml at MS with a frequency of 1 Hz and +109±96 ml at MS with a frequency of 5 Hz (p<0.001). MS is a safe procedure and is well tolerated by patients. pMS when exposed to the area of S2-S4 roots for 20 minutes 3 times a week with a course for 5 weeks is reliably effective against the clinical symptoms of OAB at different frequency modes (1 and 5 Hz). At the same time, MS with a frequency of 5 Hz may have an advantage over stimulation of 1 Hz in terms of its effect on urodynamic parameters (maximum cystometric capacity, peak and average urine flow velocity and residual urine volume), which may be associated with a large inhibitory effect on detrusor.
Published Version
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