A NEW MODIFIED CATHETER FOR TRANSURETHRAL INSERTION OF A NEEDLE ELECTRODE INTO THE EXTERNAL URETHRAL SPHINCTER

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  • 膀胱, 尿道内圧および外尿道括約筋筋電図同時測定用カテーテルと針電極の試作

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Description

A new modified catheter for recording of the electromyogram of the external urethral sphincter through a needle electrode is described. This catheter is a 20 Fr. urethral balloon catheter and has 4 channels, which are for the measuring of bladder and urethral pressure, for infusion of the bladder and for the recording of the electromyogram. The needle electrode is monopolar and 0.2mm in diameter. The channel for electromyography is set to remain in contact with the external urethral sphincter when the balloon is inflated near the bladder neck. Therefore, by inserting the electrode into the channel, we can record the electrical activity of the external urethral sphincter easily and exactly.

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