What is the primary function of the high-frequency filter in SSEP monitoring?

The primary function of the high-frequency filter in somatosensory evoked potential (SSEP) monitoring is to clarify true event detection. During SSEP monitoring, electrical signals from peripheral nerves are recorded while the patient is undergoing surgery. These signals are often accompanied by various forms of noise and artifacts, some of which are high-frequency in nature. By applying a high-frequency filter, the system can effectively remove or reduce this unwanted high-frequency noise that does not represent true neural activity, thus allowing the clinician to better interpret the actual evoked potentials of interest. This enhances the clarity of the data collected, aiding in more accurate monitoring of neural function during surgical procedures.