ESU Switching Circuit for Smooth Muscle Identification During Surgery
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Solution Overview
Problem
Minimally invasive surgeries lack tactile feedback, and integrating additional electrostimulation units for smooth muscle identification complicates the surgical environment, necessitating a solution that allows existing electrosurgical units (ESUs) to deliver stimulation signals without additional equipment.
Innovation Solution
A smooth muscle stimulation device that integrates with ESUs, enabling switching between stimulation and electrosurgical power using a single enclosure with user-controlled switching circuitry, allowing existing electrosurgical tools to deliver both stimulatory and cutting/coagulation signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate electrostimulation unit with dedicated electrode probes is introduced to deliver stimulation signals for smooth muscle identification, then the ability to identify and avoid critical smooth muscle structures (such as ureters) is improved, but the complexity of the surgical environment increases and additional equipment is required
Solution Approach 1:
The patent combines the electrostimulation unit with the existing electrosurgical unit (ESU) into a single integrated device. The ESU's existing electrode probes are used to deliver both electrosurgical power and stimulation signals, eliminating the need for separate electrostimulation equipment while maintaining the ability to identify smooth muscle structures through tactile feedback during surgery
Solution Approach 2:
The electrosurgical unit is designed to perform multiple functions: it can deliver both high-power electrosurgical signals for cutting/coagulation and low-power stimulation signals for smooth muscle identification. The switching circuitry enables the same electrode probes to be used for both diagnostic (stimulation) and therapeutic (electrosurgery) purposes, reducing equipment complexity
2Adaptability or versatility
If existing electrosurgical units are modified to deliver stimulation signals, then additional equipment introduction is minimized and workflow disruption is reduced, but switching between stimulation and electrosurgical power requires complex circuitry
Solution Approach 1:
The system employs dynamic switching circuitry that can rapidly alternate between delivering high-power electrosurgical signals and low-power stimulation signals through the same electrode probes. The switching mechanism is controlled by the operator in real-time, allowing flexible transition between diagnostic and therapeutic modes without requiring physical reconfiguration of equipment
Solution Approach 2:
The patent introduces switching circuitry as an intermediary component within the ESU that mediates between the power source and the electrode probes. This switching mechanism selectively connects either the electrosurgical power output or the stimulation signal output to the probes, enabling single-device operation for both functions while managing power delivery safety
3Loss of information
If tactile feedback is restored during minimally invasive surgery, then the surgeon's ability to identify tissue structures and avoid damage is improved, but the minimally invasive approach loses its primary advantage of reduced surgical access
Solution Approach 1:
The system provides real-time tactile feedback to the surgeon by delivering electrical stimulation signals through the electrode probes during minimally invasive surgery. When the probes contact or approach smooth muscle structures (such as ureters), the stimulated tissue produces observable contractions that give the surgeon immediate tactile-like feedback about the presence and location of critical structures, enabling safe navigation without direct tissue contact
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
Facilitates seamless surgical workflow by maintaining ESU capabilities while providing tactile feedback through existing instruments, reducing equipment disruption and enhancing surgical precision.
Implementation Method 1
The stimulation circuitry is configured to generate a stimulatory electrical signal which, when delivered to a target anatomy, induces an observable response in the target anatomy
Data Source
AI summary
A smooth muscle stimulation device is intended for use with any one of a variety of electrosurgical units (ESU's) of the type used in tissue resection and other procedures that risk damage to non-target tissues. The smooth muscle stimulation devices typically include an enclosure with stimulation circuitry configured to generate a stimulatory electrical signal which when delivered to a target anatomy induces an observable response in the target anatomy during a medical procedure. An input connector on the enclosure detachably couples to a power output of the ESU, and an output connector on the enclosure detachably couples to an electrosurgical tool. Switching circuitry within the enclosure selectively connects either the power output of the ESU or the stimulatory electrical signal of the stimulation circuitry to the output connector in response to user input.