Wearable Return Electrode for Electrosurgery
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Solution Overview
Problem
Existing return electrodes in electrosurgical systems face issues such as inconsistent contact with patients due to their design, which can lead to ineffective current flow and interference with medical imaging techniques, and they are not adaptable to varying patient sizes or body contours.
Innovation Solution
A wearable return electrode with a flexible sheath and conductive element that conforms to the patient's body contours, ensuring consistent contact and transparency to medical imaging techniques, while being adaptable to different patient sizes through adjustable areas and visual indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flat laminar return electrode is used, then the electrode structure is simple and easy to manufacture, but the contact consistency with the patient is poor due to body contours and movement
Solution Approach 1:
The return electrode is designed with a curved or contoured surface that matches the natural contours of the patient's body. This curvature allows the electrode to maintain consistent contact with the body surface even during patient movement, resolving the contradiction between simple structure and reliable contact consistency.
Solution Approach 2:
The electrode incorporates flexible materials and thin film structures that can adapt to body contours. This flexibility enables the electrode to conform to the patient's anatomy while maintaining a relatively simple overall structure, thereby improving contact consistency without significantly increasing device complexity.
2Adaptability or versatility
If the return electrode contact area is reduced for smaller patients, then the electrode size is reduced for better adaptability, but the current density increases beyond safe thresholds
Solution Approach 1:
The electrode incorporates materials or structural features that change their electrical parameters (such as resistance or conductivity) in response to applied pressure or contact conditions. This allows the electrode to automatically adjust current density distribution, maintaining safe thresholds even when the contact area is reduced for smaller patients, thus enabling better size adaptability.
Solution Approach 2:
A conductive gel or intermediate layer is introduced between the electrode and the patient's skin. This intermediary substance fills gaps and enhances contact quality, allowing the electrode to maintain safe current density distribution even with reduced contact area, thereby improving adaptability to different patient sizes without increasing harmful current density.
3Reliability
If conventional return electrodes are used, then the electrical return function is provided, but transparency to medical imaging techniques is blocked
Solution Approach 1:
The electrode is constructed from composite materials that combine electrical conductivity with radiological transparency. These composite materials allow electrical current to flow effectively while permitting imaging techniques such as X-rays and fluoroscopy to pass through without significant interference, thus improving imaging transparency without overly complicating the material composition.
Solution Approach 2:
The electrode incorporates porous or mesh-like structures that reduce material density and improve radiological transparency. These porous materials maintain sufficient electrical conductivity for the return function while allowing imaging beams to pass through more easily, thereby enhancing imaging transparency with moderate increases in structural complexity.
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 wearable return electrode provides secure and consistent electrical contact, enhances surgical efficacy by maintaining safe current flow, and allows for transparent operation with medical imaging, accommodating various patient sizes and body shapes.
Implementation Method 1
a conductive element disposed inside the outer pad. The conductive element and the outer pad are flexible so that the return electrode conforms to the contours of a patient when donned during use
Data Source
AI summary
A wearable electrosurgical return electrode includes an outer pad, an inner pad, and a conductive element disposed between the outer pad and the inner pad. The return electrode is formed as a flexible sheath and configured to be worn over at least a portion of a body during use.