Universal Self-Limiting Electrosurgical Return Electrode for Burn Prevention
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Solution Overview
Problem
Existing electrosurgical return electrodes are limited in size and shape, requiring multiple versions for different patient categories, and often result in patient burns due to non-uniform current density and orientation-dependent functionality, necessitating complex monitoring systems and high costs.
Innovation Solution
A self-limiting electrosurgical return electrode with a symmetrical, expansive design that allows non-uniform current distribution, ensuring safe use across various patient sizes without the need for conductive gels or additional monitoring circuits, by incorporating materials like conductive threads or carbon black to control current density and temperature rise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a large return electrode is used to reduce current density and prevent burns, then patient safety is improved, but the electrode cannot be properly positioned on all patient body types and sizes
Solution Approach 1:
The return electrode is divided into multiple independent contact points arranged in a distributed pattern. Each contact point can independently make contact with the patient's body, allowing the electrode to adapt to various body types and positions while maintaining sufficient total contact area to distribute current density and prevent burns.
Solution Approach 2:
Different regions of the return electrode have different contact characteristics - some areas have higher contact pressure for better electrical connection, while other areas provide mechanical support. This local differentiation allows the electrode to simultaneously achieve good electrical contact and adapt to various patient anatomies without causing burns.
2Adaptability or versatility
If multiple electrode sizes are manufactured for different patient categories, then adaptability to different patients is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
A single return electrode design with distributed contact points serves multiple patient sizes and body types. The electrode's modular contact point arrangement allows it to function universally across different patient categories, eliminating the need to manufacture and manage multiple specialized electrode sizes while maintaining adaptability to various patients.
3Ease of operation
If sticky pads with adhesive borders are used to attach to patient skin, then ease of attachment is improved, but the pads are disposable increasing surgical costs
Solution Approach 1:
The return electrode uses a disposable adhesive border similar to sticky pads, but this single-use adhesive layer is integrated into a larger reusable electrode structure. The disposable adhesive provides easy attachment while the reusable electrode body reduces overall costs by eliminating the need for multiple specialized electrodes and monitoring systems.
Solution Approach 2:
The return electrode incorporates a self-limiting design where the distributed contact points automatically adjust to provide adequate electrical contact without requiring complex monitoring systems or precise positioning. This self-adjusting capability reduces the need for additional monitoring equipment and simplifies the surgical workflow.
4Ease of manufacture
If flat steel plates are used as return electrodes, then ease of manufacture is improved, but they require gravity-dependent positioning and lack flexibility
Solution Approach 1:
The return electrode uses a flexible substrate that can be bent and conform to various patient body surfaces, replacing the rigid flat steel plate design. This flexible construction maintains ease of manufacture through modular assembly while providing the positioning flexibility needed to adapt to different patient anatomies and surgical positions.
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
The electrode effectively limits current density and temperature rise, preventing patient burns and reducing surgical costs by eliminating the need for multiple electrode sizes and monitoring systems, while maintaining surgical efficacy across diverse patient populations.
Implementation Method 1
incorporating materials like conductive threads or carbon black to control current density
Implementation Method 2
the heating of body tissue to the threshold of necrosis occurs when the current density exceeds 100 milliamperes per square centimeter
Data Source
AI summary
A self-limiting electrosurgical return electrode for use with electrosurgical procedures is disclosed. The return electrode includes a conductive element and pads disposed on opposing sides of the conductive element. The conductive element, optionally in combination with the pads, is configured to limit the density of electrical current that passes from a patient to the return electrode. The conductive element and the pads can cooperate to define two separate working surfaces on opposing sides of the return electrode. The return electrode can also be safely used with patients of substantially any size and without requiring adjustments to the power settings of an electrosurgical generator.