Special needles insulated regional anesthesia with the technique of searching for the nerve electrostimulation (ENS). They are equipped with cable connection to a device for the emission of the electrical nerve stimulation. The device consists of: 1. AISI 304 stainless steel cannula medical, with various types of spikes, covered with insulating material on all sides. Triple sharpening tip 2. Luer Lock quadrangular transparent ABS plastic medical devices. 3. Wire connecting the probe isolated to allow the transmission of electrical impulses. 4. 60 cm PVC medical extension terminal for connection to the female Luer syringe injection. 5. Hood cover needle in polyethylene.