Brekkan E, Flink R, Wallin G
Department of Urology, University Hospital, Uppsala, Sweden.
Scand J Urol Nephrol Suppl. 1988;114:87-90.
The sensory pathways innervating the male urethra were investigated by recording the sensory thresholds with electrical stimulation. Twenty-six male subjects (age 16 to 73 years) were included in the study. Ring-electrodes mounted on a Foley catheter were used for stimulation in proximal and distal urethra. Square wave pulses (duration 0.5 ms) were delivered with a constant current stimulator at different frequencies and the lowest intensity felt by the subject was defined as the threshold. The sensory thresholds were in the order of 0.5 to 5 mA and decreased with increasing stimulation frequency. All patients described a qualitative difference in the experienced sensation when comparing proximal and distal urethral stimulation. The reason for this is discussed. The possible use of this method as an adjunct to the urodynamic investigation in diagnosing neurogenic lesions is proposed.
通过电刺激记录感觉阈值，对支配男性尿道的感觉通路进行了研究。26名男性受试者（年龄16至73岁）纳入了该研究。安装在Foley导尿管上的环形电极用于近端和远端尿道的刺激。用恒流刺激器以不同频率发送方波脉冲（持续时间0.5毫秒），受试者感觉到的最低强度被定义为阈值。感觉阈值在0.5至5毫安之间，并随着刺激频率的增加而降低。所有患者在比较近端和远端尿道刺激时，都描述了所体验感觉的质性差异。对此原因进行了讨论。提出了将该方法作为尿动力学检查辅助手段用于诊断神经源性病变的可能性。
