Disposable Sheath Designs for the Stimulating Endoscope and Needle Endoscopes Having Distal Electrodes for Nerve Block under Direct Vision and Methods for Making and Using Same

A nerve blocking endoscope apparatus is disclosed having a disposable sheath and a stimulating assembly including an internal electrode and an external electrode for stimulation of a nerve for identification purposes and to methods for making and using same. A needle nerve blocking endoscope apparatus having an internal electrode for nerve stimulation.