Conductive Fabric Return Electrodes for RF Imaging Transparency
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Solution Overview
Problem
Existing electrosurgical return electrodes face challenges such as inconsistent contact with patients due to their size and geometry, interference with medical imaging techniques, and limitations in accommodating varying patient sizes, leading to inefficiencies and potential patient safety issues during surgeries.
Innovation Solution
The development of electrosurgical return electrodes featuring a conductive fabric layer between pads, which is transparent to RF waves and other medical imaging wavelengths, ensuring consistent contact and adaptability to different patient sizes while maintaining safe current distribution and avoiding interference with imaging systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat laminar return electrode structure is used, then the electrode can be simple in design and manufacture, but the contact between patient and electrode becomes inconsistent due to body contours and movement
Solution Approach 1:
The return electrode incorporates a flexible foam layer between the flat laminar structure and the patient's body. This flexible element conforms to body contours and maintains consistent contact during patient movement, resolving the contradiction between simple flat structure design and reliable contact consistency.
2Area of stationary object
If larger return electrodes are used to accommodate smaller patients, then contact area is sufficient, but the electrode becomes unnecessarily big and inconvenient on smaller operating tables
Solution Approach 1:
The return electrode system allows dynamic selection of appropriate electrode sizes based on patient size. The flexible foam layer enables smaller electrodes to maintain sufficient contact area by conforming to the patient's body surface, eliminating the need to use unnecessarily large electrodes on smaller operating tables while still providing adequate contact area for smaller patients.
3Reliability
If traditional conductive materials are used in the return electrode, then electrical conductivity is achieved, but interference with medical imaging techniques occurs
Solution Approach 1:
The return electrode employs composite materials that combine electrical conductivity with transparency to RF waves and other medical imaging wavelengths. This allows the electrode to maintain reliable electrical conductivity for electrosurgical current return while simultaneously preventing interference with medical imaging techniques such as RF-based imaging systems.
4Reliability
If self-limiting return electrodes with large geometries are used, then current density is self-limited to safe thresholds, but the electrode requires multiple sizes for different patient sizes
Solution Approach 1:
The return electrode design incorporates a flexible foam layer that enables a single electrode size to adapt to different patient sizes and body contours. This universal design maintains self-limiting current density characteristics while eliminating the need for multiple electrode sizes, as the flexible structure conforms to various body types and provides adequate contact area regardless of patient size.
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 solution provides a flexible and adaptable return electrode system that ensures consistent and secure contact with patients, maintains patient safety by preventing burns, and allows for effective use during various medical imaging procedures, enhancing the efficiency and safety of electrosurgical operations.
Implementation Method 1
self-limiting return electrodes were specifically designed to evenly distribute the current density over the entire contact area between the patient and the return electrode in order to reduce the risk of patient burns
Implementation Method 2
The conductive element includes a flexible fabric that is transparent to RF waves
Data Source
AI summary
An electrosurgical system comprises a return electrode that includes a conductive element disposed between two pads. The conductive element comprises a flexible, conductive fabric material and an electrical bus bar disposed along an edge of the fabric. The return electrode, including the conductive element, is transparent to RF waves and other wavelengths used in medical imaging systems.