RF Output Relay Circuit for Simultaneous Monopolar and Bipolar Use
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Solution Overview
Problem
Current electrosurgical units cannot simultaneously operate a monopolar and a bipolar hand piece, limiting surgical procedures to single modalities and increasing surgical time.
Innovation Solution
An electrosurgical unit with a radiofrequency generator and relay circuitry that allows simultaneous operation of multiple hand pieces, including a receptacle for bipolar energy delivery and another for both monopolar and bipolar energy delivery, enabling the use of both monopolar and bipolar modes concurrently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current electrosurgical units are used, then single modality operation is supported, but simultaneous operation of monopolar and bipolar hand pieces is not possible
Solution Approach 1:
The output stage is segmented into multiple independent RF amplifiers (bipolar RF amplifier and monopolar RF amplifier), each capable of operating independently. The relay circuit is also segmented into multiple relay switches that can independently connect different amplifiers to receptacles, enabling flexible simultaneous operation of multiple hand pieces with different modalities.
Solution Approach 2:
The electrosurgical unit is designed with universal receptacles that can accept both monopolar and bipolar hand pieces. The relay circuit provides multi-functionality by enabling any receptacle to be connected to either bipolar or monopolar RF output, allowing the system to perform multiple functions simultaneously.
2Productivity
If single modality operation is used, then device complexity is reduced, but surgical time increases
Solution Approach 1:
The system enables continuous useful action by allowing multiple hand pieces to operate simultaneously without requiring switching between modalities. The relay circuit ensures continuous RF energy delivery to multiple receptacles at the same time, eliminating downtime between modality changes and maintaining continuous surgical workflow.
3Adaptability or versatility
If relay circuitry is added to enable simultaneous operation, then adaptability improves, but device complexity increases
Solution Approach 1:
The relay circuit acts as an intermediary between the RF amplifiers and the receptacles. It mediates the connection by using relay switches that can route RF signals from appropriate amplifiers to appropriate receptacles, enabling flexible multi-hand piece operation while isolating the complexity of the switching logic from both the amplifiers and the hand pieces.
Data Source
AI summary
An electrosurgical unit including a radiofrequency generator configured to generate electrosurgical energy. The radiofrequency generator includes a first receptacle configured to electrically couple with an electrosurgical hand piece configured to deliver bipolar radiofrequency energy. A second receptacle is included and configured to electrically couple with an electrosurgical hand piece configured to deliver monopolar radiofrequency energy. The radiofrequency generator includes a relay circuit configured to allow simultaneous radiofrequency energy delivery to the electrosurgical hand pieces in the first receptacle and the second receptacle.