1982 Volume 73 Issue 8 Pages 988-995
Simultaneous measurement of cystometry and external sphincter electromyography were performed on 197 patients with various neurogenic and non-neurogenic bladder disturbances. Detrusor sphincter dyssynergia (DSD) which is defined as a persistent electromyographic activity of external sphincter during and/or intended micturition, was found on 50 patients among them. The incidence of DSD was as follows; Encephalopathy 7/33 cases (21.2%). Myelopathy 18/42 cases (42.9%). Neuropathy 8/31 cases (25.8%). Mixed type 10/35 cases (28.6%). Non-neurogenic 7/56 cases (12.5%). It is worth to note that DSD was also found in non-neurogenic patients and the incidence of DSD in the patients with myelopathy significantly higher than that of encephalopathy. We classified the electromyographic pattern of DSD as follows. Type 1; Increased electromyographic activity during micturition... 12 cases. Type 2; Unchanged electromyographic activity... 12 cases. Type 3; Decreased but persistent electromyographic activity... 19 cases. Type 4; Failure to supress the electromyographic activity voluntarily and the patient was unable to initiate micturition... 5 cases. Clinical as well as pathophysiological importance of above classifications is awaited for further study.
