A new technique of vesical electromyogram with cystometrogram and urethral electromyogram.

The authors improved the Nélaton catheter with a pair of carbon fiber electrodes as previously published and also improved the Foley catheter with a pair of carbon fiber electrodes which are less painful and easier to use. We also have made efforts how to record the vesical electromyogram (EMG) simultaneously with cystometry and urethral EMG which can be used easily for the evaluation of neurogenic bladder. With these specially made Foley catheters, simultaneous recordings of vesical EMG with cystometry were performed on 24 subjects (17 males and 7 females, mean age 53.6 years) who visited our clinic because of various urinary disturbances. The results of the vesical EMG recordings which show various manifestations could approximately be divided into three groups by their approximate voltage of the amplitude (normal-voltage, high-voltage and low-voltage groups), especially during the filling phase of the cystometrography.