摘要:
A system (100) for detecting positioning effect in a body, comprises a signal output operable to couple directly or indirectly to a stimulating electrode (122) to deliver a time-locked electrical stimulus to a peripheral nerve in the body; a signal input operable to couple directly or indirectly to a recording electrode (112) to record a plurality of resultant electrical waveforms generated by the body's nervous system in response to the time-locked electrical stimulus; a signal generation circuit and/or processor coupled to the signal output and the signal input and configured to cause the signal output to generate the electrical stimulus and the signal input to receive the plurality of resultant electrical waveforms; and a detection processor configured to detect a positioning effect by comparing the processed resultant electrical waveform to a moving baseline waveform, wherein the moving baseline waveform is established by: developing an initial baseline waveform from an average of the plurality of resultant electrical waveforms; upon the delivery by the signal output of an additional electrical stimulus to the peripheral nerve in the body, determining if the additional resultant electrical waveform is good by comparing the additional resultant electrical waveform to the initial baseline; if the additional resultant electrical waveform is good, developing an updated baseline waveform, wherein the updated baseline waveform is a weighted average of the initial baseline waveform and the additional resultant electrical waveform; and if the additional resultant electrical waveform is not good, setting the updated baseline waveform to the initial baseline waveform.
摘要:
A system for recording, processing, and monitoring biosignals is provided, the system being configured to suspend data acquisition whenever an electric surgical tool or other generator of high frequency interference is in use. Such a system may protect the hardware of the system and reduce or eliminate the acquisition of distorted signals. The system of some embodiments includes an amplifier system configured to detect the presence of high frequency interference. Related methods are also disclosed.
摘要:
A system (100) for detecting positioning effect in a body, comprises a signal output operable to couple directly or indirectly to a stimulating electrode (122) to deliver a time-locked electrical stimulus to a peripheral nerve in the body; a signal input operable to couple directly or indirectly to a recording electrode (112) to record a plurality of resultant electrical waveforms generated by the body's nervous system in response to the time-locked electrical stimulus; a signal generation circuit and/or processor coupled to the signal output and the signal input and configured to cause the signal output to generate the electrical stimulus and the signal input to receive the plurality of resultant electrical waveforms; and a detection processor configured to detect a positioning effect by comparing the processed resultant electrical waveform to a moving baseline waveform, wherein the moving baseline waveform is established by: developing an initial baseline waveform from an average of the plurality of resultant electrical waveforms; upon the delivery by the signal output of an additional electrical stimulus to the peripheral nerve in the body, determining if the additional resultant electrical waveform is good by comparing the additional resultant electrical waveform to the initial baseline; if the additional resultant electrical waveform is good, developing an updated baseline waveform, wherein the updated baseline waveform is a weighted average of the initial baseline waveform and the additional resultant electrical waveform; and if the additional resultant electrical waveform is not good, setting the updated baseline waveform to the initial baseline waveform.
摘要:
A system for recording a non-distorted evoked potential, comprising: a signal output operable to couple directly or indirectly to a stimulating electrode to deliver an electrical stimulus to a body; a signal input operable to couple directly or indirectly to a recording electrode to receive a detected signal, wherein the detected signal comprises high frequency interference and an evoked potential generated by the body's nervous system in response to the electrical stimulus; and a processing circuit coupled to the signal input, wherein the processing circuit comprises: a microprocessor configured to process and analyze a recorded signal, and an amplifier system, wherein the amplifier system comprises: a first signal path configured to amplify the evoked potential, and a second signal path configured to detect the high frequency interference, wherein the first signal path and the second signal path are connected to the microprocessor, and wherein the microprocessor is further configured to suspend data acquisition from the first signal path and suspend amplification within the amplifier of the first signal path upon detection of high frequency interference within the detected signal.
摘要:
The present technology relates generally to the field of electrophysiology and specifically to automated devices, components, systems, and related methods for monitoring potential injury to the nervous system using evoked potentials during intraoperative neurophysiologic monitoring.