Electrosurgical Plug With Mechanical Switch For Safety
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Solution Overview
Problem
Electrosurgical systems often fail to ensure proper connection between the active and return electrodes before activating the active electrode, which can lead to unintended energy pathways during surgical procedures.
Innovation Solution
A plug with a mechanical switch mechanism that prevents activation of the active electrode until the return electrode is properly connected to the electrosurgical generator, ensuring safe and controlled energy delivery by electrically coupling the active electrode only when the return electrode is connected to the return terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the active electrode is activated without ensuring proper return electrode connection, then surgical energy delivery can proceed quickly, but unintended energy pathways and harmful tissue effects may occur
Solution Approach 1:
The mechanical switch mechanism is configured to require preliminary connection of the return electrode to the return terminal before the active electrode can be activated. The switch remains in a first position (blocking activation) until the return electrode is properly connected, at which point it transitions to a second position (allowing activation). This preliminary verification action prevents unsafe energy delivery while maintaining straightforward operation.
2Reliability
If a mechanical switch mechanism is added to verify return electrode connection, then safety and control of energy delivery are improved, but the device complexity increases
Solution Approach 1:
The mechanical switch mechanism is integrated directly into the return plug structure, merging the connection verification function with the existing return electrode connector. The switch components (movable contact, fixed contact, actuator) are incorporated within the plug housing, eliminating the need for separate verification devices and reducing overall system complexity while maintaining safety control.
Solution Approach 2:
The mechanical switch mechanism automatically verifies the return electrode connection and controls the active electrode activation without requiring separate verification steps or additional user actions. The actuator is directly engaged by the return electrode connection, causing automatic transition of the switch from the first position to the second position, enabling the system to self-verify and self-control the energy delivery safety.
3Ease of operation
If the active plug is always electrically connected to the active cable, then the device is simpler to operate, but energy can be transferred unintentionally when the return electrode is not connected
Solution Approach 1:
The mechanical switch mechanism serves as an intermediary between the active plug and the active cable, controlling the electrical connection based on return electrode status. When the return electrode is not connected, the switch remains in the first position, interrupting the electrical pathway. When the return electrode is properly connected, the switch transitions to the second position, establishing the electrical connection. This intermediary control prevents unintended energy pathways while maintaining ease of operation.
Data Source
AI summary
A surgical system includes an active terminal, a return terminal, an active electrode, a return electrode, an active plug configured to connect to the active terminal, and a return plug configured to connect to the return terminal. The return plug is coupled to the return electrode and coupled between the active plug and the active electrode. The return plug is configured to break an electrical connection between the active plug and the active electrode when the return plug is not connected to the return terminal and to establish an electrical connection between the active plug and the active electrode when the return plug is connected to the return terminal.