Electrode placement (use the ring electrodes)
14-cm distance (black to black)
- E1 (black): Proximal phalanx of the index finger — want to keep away from the metacarpophalangeal (MCP) joint skin, as this may pick up motor conduction artifact.
- E2 (red): 3-4cm distally from E1.
- Ground: Dorsum of hand
Stimulation site
- (-) Cathode (black): 14-cm proximal to E1. Note: Make the 14-cm line to the middle of the wrist crease, then proximal along the median nerve.
- (+) Anode (red): proximal (in line with the median nerve)
Additional Information
- Type of stimulation = Antidromic
- May need to place the recording electrode (E1) more distally if you are getting too much motor volume-conduction
- CPT codes for nerve conduction studies
- 95900 Nerve conduction, amplitude and latency/velocity study, each nerve; motor, without F-wave study
- 95903 Nerve conduction, amplitude and latency/velocity study, each nerve; motor with F-wave study
- 95904 Nerve conduction, amplitude and latency/velocity study, each nerve; motor with F-wave study, each nerve; sensory
- 95934 H-reflex, amplitude and latency study; record gastrocnemius/soleus muscle
- 95936 Record muscle other than gastrocnemius/soleus muscle
