Peripheral Electrical Nerve Stimulator
• Used to locate the nerve by causing depolarization with electrical pulses and contracting the muscles or causing sensation in the distributed area.
• Designed for an impulse frequency of 1-2 HZ and a stimulus amplitude of 0-5 mA.
• Desired threshold current = 0.2-0.5 mA.
• Currently use 22 ga. needles in multiple lengths (2-4-6 inch) with an integrated electrode wire in the hub and extension tubing to inject local anesthetic.
• Note: All nerve blocks can be performed by 2-inch needle, except sciatic blocks which require a longer needle.