What are the standard filter settings (LFF and HFF respectively) for Sensory Conduction Studies?

In sensory conduction studies, the standard filter settings are optimized to capture the relevant frequencies associated with sensory nerve action potentials while minimizing noise. The use of 20 Hz as the lower frequency filter (LFF) helps eliminate low-frequency artifacts, such as movement or other physiological signals that do not contribute to assessing nerve function. Simultaneously, the higher frequency filter (HFF) setting of 3 kHz is chosen to allow the passage of the action potentials generated by sensory nerves, which typically have a frequency range well within this limit.

This filtering range is essential for ensuring that the signals recorded during sensory conduction studies are clear and interpretable, supporting accurate diagnostics. The selected settings balance sensitivity to the desired nerve response while filtering out irrelevant low-frequency and high-frequency noise. Other options may utilize lower or higher frequency settings that could compromise the quality of the nerve conduction study results.