Electrosurgical Plug Interlock for Return-Electrode Verification
Find Innovative SolutionsGenerate Solutions
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 remains disconnected from the active cable until the return plug is properly connected to the return terminal, ensuring safe and controlled energy delivery by transitioning to an engaged position only when the return plug is connected, thus preventing activation of the active electrode until the return electrode is securely linked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the active electrode is allowed to be activated without verifying return electrode connection, then the surgical procedure can proceed without delays, but unintended energy pathways may occur leading to safety hazards
Solution Approach 1:
The mechanical switch mechanism is configured to automatically verify the return electrode connection status before allowing activation of the active electrode. The switch remains in a first position when the return plug is disconnected and transitions to a second position only when the return plug is properly connected, thereby performing the safety check in advance before energy delivery is permitted.
2Reliability
If a mechanical switch mechanism is added to verify return electrode connection before activation, then safety is improved by preventing unintended energy pathways, but device complexity increases
Solution Approach 1:
The mechanical switch mechanism automatically detects the connection status of the return plug and adjusts its position accordingly without requiring external control or additional sensors. The switch uses the physical presence or absence of the return plug to trigger the position change, enabling the system to self-verify and self-regulate the activation condition.
Solution Approach 2:
The mechanical switch acts as an intermediary component between the return plug connection and the active electrode activation. It mediates the control signal by transitioning between two positions based on the return plug status, thereby safely enabling or disabling the energy delivery path without requiring complex electronic control systems.
3Object-affected harmful factors
If the mechanical switch remains disconnected until return plug is connected, then safety is ensured by blocking unintended energy pathways, but the time to establish proper electrical connection increases
Solution Approach 1:
The mechanical switch is pre-configured to be in a blocked position that prevents activation of the active electrode. When the return plug is connected, the switch automatically transitions to an enabled position, allowing immediate activation. This preliminary blocking configuration ensures safety is built-in from the start, and the transition occurs instantly upon proper connection without requiring additional verification steps.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An electrosurgical system includes an electrosurgical generator having active and return terminals, an electrosurgical instrument including an active electrode, a return instrument including a return electrode, an active plug configured to connect to the active terminal of the generator, a return plug configured to connect to the return terminal of the generator, an active cable extending from the return plug to the electrosurgical instrument, a return cable extending from the return plug to the return instrument, a connector cable extending from the active plug to the return plug, and a mechanical switch mechanism disposed within the return plug. The mechanical switch mechanism has a disengaged position in which the active plug is electrically disconnected from the active cable and an engaged position in which the active plug is in electrical communication with the active cable.