Interface Module Selective Signal Muting for Nerve Monitoring
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Solution Overview
Problem
Current nerve integrity monitoring systems experience significant electrical interference during electrosurgical procedures, leading to false positives and noise, which necessitate suspension of EMG monitoring, making surgical procedures cumbersome and time-consuming.
Innovation Solution
An interface module that can selectively deliver electrical stimulation signals and radio frequency signals to an instrument, allowing for simultaneous nerve monitoring and electrosurgery while preventing nerve damage by automatically disabling RF signals when a nerve is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrosurgical procedures are performed using current electrosurgical units, then tissue cutting and cauterization are achieved, but significant electrical interference is generated causing false positives and noise in nerve integrity monitoring
Solution Approach 1:
The patent introduces a probe with a selection module that acts as an intermediary between the electrosurgical unit and the nerve integrity monitoring system. This probe selectively mutes specific channels of the monitoring system during electrosurgical procedures, filtering out the harmful electrical interference while preserving the ability to detect genuine nerve signals when the electrosurgical unit is not active.
Solution Approach 2:
The system dynamically changes the operational parameters of the nerve integrity monitoring system by selectively muting different channels based on the surgical phase. During electrosurgical cutting or coagulation, specific monitoring channels are muted to prevent interference, while other channels remain active to continue monitoring nerve function in non-affected areas.
2Reliability
If nerve integrity monitoring channels are muted during electrosurgical procedures to prevent electrical interference, then false positives are reduced, but EMG monitoring must be suspended making procedures cumbersome and time-consuming
Solution Approach 1:
Instead of muting all monitoring channels during electrosurgical procedures, the system applies partial muting by selectively disabling only the specific channels that would be affected by electrical interference. This allows other monitoring channels to remain active and continue providing real-time nerve function feedback, thereby maintaining surgical efficiency while preventing false positives.
Solution Approach 2:
The patent enables continuous nerve integrity monitoring throughout the entire electrosurgical procedure by maintaining activity in non-muted channels. The monitoring action continues uninterrupted, providing real-time feedback to the surgeon without requiring suspension or interruption of the overall monitoring system, thus eliminating time loss associated with restarting monitoring after each electrosurgical step.
3Reliability
If a probe is used to mute all channels during electrosurgical procedures, then electrical interference is reduced, but the surgical process becomes cumbersome requiring intermittent pausing to restore monitoring
Solution Approach 1:
The system dynamically adjusts the muting state of different monitoring channels based on the real-time surgical phase. The selection module automatically transitions between different muting configurations as the surgeon switches between cutting, coagulation, and other electrosurgical modes, providing adaptive interference reduction without requiring manual intervention or pausing of the procedure.
Solution Approach 2:
The patent implements a feedback mechanism where the system continuously monitors the surgical phase and automatically adjusts which monitoring channels are muted accordingly. This closed-loop control allows the system to respond to changing surgical conditions in real-time, maintaining optimal monitoring accuracy without disrupting the surgical flow or requiring the surgeon to manually manage monitoring settings.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables continuous EMG monitoring during electrosurgical procedures, reducing the risk of nerve damage and improving surgical efficiency by selectively managing signal delivery between electrical stimulation and RF generators.
Implementation Method 1
During electrical stimulation, a stimulation probe applies a stimulation signal near the area where the subject nerve may be located. If the stimulation probe contacts or is reasonably near the nerve, the applied stimulation signal is transmitted through the nerve to excite the innervated tissue.
Implementation Method 2
Incision of tissue is accomplished by applying a source of electrical energy (most commonly, a radio-frequency generator) to the tip. Upon application of the tip to the tissue, a voltage gradient is created, thereby inducing current flow and related heat generation at the point of contact. With sufficiently high levels of electrical energy, the heat generated is sufficient to cut the tissue and, advantageously, to simultaneously cauterize severed blood vessels.
Data Source
AI summary
Concepts presented herein relate to an interface module that can be electrically coupled to an electrical stimulation generator, a radio frequency generator and an instrument. A selection module is coupled to the interface module and operates in a first mode to deliver electrical stimulation signals from the electrical stimulation generator to the instrument and in a second mode to deliver radio frequency signals from the radio frequency generator to the instrument.