Multiplexed Hand Switches for Electrosurgical Forceps
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Solution Overview
Problem
Current electrosurgical systems lack hand switch functionality in bipolar forceps, which is essential for controlled delivery of electrosurgical energy, limiting the precision and effectiveness of procedures like tissue cutting, coagulation, and vessel sealing.
Innovation Solution
The integration of a multiplexed switch system within electrosurgical devices, where movable components actuate secondary switches, and a multiplexer circuit generates voltage signals based on switch activations, allowing the electrosurgical generator to determine the appropriate output mode and control the delivery of electrosurgical energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hand switch functionality is integrated into bipolar forceps, then control precision and effectiveness of electrosurgical procedures is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple switch components (main switch, secondary switches) within the compact structure of bipolar forceps. The switches are nested within the forceps housing, with movable components (jaw members, lever) that actuate the switches through mechanical coupling. This nesting approach enables hand switch functionality without significantly increasing the external dimensions or overall complexity of the forceps.
Solution Approach 2:
The patent introduces a multiplexer circuit as an intermediary component that receives signals from multiple switches and transmits consolidated control signals to the electrosurgical generator. This multiplexer simplifies the control architecture by reducing the number of independent control lines needed, thereby managing device complexity while maintaining precise control capabilities through multiple switch states.
2Adaptability or versatility
If multiple switches are integrated into the electrosurgical device, then control versatility is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal control architecture where a main switch and multiple secondary switches work together to provide versatile control functions. The main switch enables or disables electrosurgical output, while secondary switches provide additional control options. This multi-functional switch system allows a single device to perform multiple control functions that would otherwise require separate devices or complex external control systems.
Solution Approach 2:
The multiplexer circuit serves as a mediator that consolidates signals from multiple switches into a manageable control interface for the electrosurgical generator. By routing multiple switch inputs through the multiplexer, the system achieves control versatility without requiring proportional increases in wiring complexity or generator input channels.
3Ease of operation
If movable components are used to actuate switches, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent designs the forceps such that the movable components (jaw members, lever) that are inherently required for the electrosurgical function also serve to actuate the switches. When the surgeon operates the forceps to close the jaws or move the lever, these movements automatically trigger the corresponding switches without requiring separate control actions. This self-service approach integrates control activation into the natural operation of the device, improving ease of use while minimizing additional mechanical complexity.
Data Source
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AI summary
An electrosurgical system includes an electrosurgical device having: a main switch, a button configured to actuate the main switch, at least one secondary switch, and a movable component configured to actuate the second switch. The system also includes an electrosurgical generator coupled to the electrosurgical device, the electrosurgical generator is configured to generate an electrosurgical output in response to actuation of the main switch and the at least one secondary switch.