Universal Self-Limiting Electrosurgical Return Electrode
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Solution Overview
Problem
Existing electrosurgical return electrodes are limited in their versatility and safety, requiring multiple sizes and orientations to accommodate different patient sizes and weight categories, which can lead to increased surgical costs and risks of patient burns due to inadequate contact or improper use.
Innovation Solution
The development of a universal safety electrosurgical return electrode with self-limiting characteristics, designed to distribute electrosurgical current non-uniformly across a wide area, allowing safe use with patients of any size and weight category, featuring a symmetrical construction with multiple working surfaces and adjustable impedance to prevent excessive current density and temperature rises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sized electrodes are used to accommodate different patient sizes, then patient safety is improved, but device complexity and surgical costs increase
Solution Approach 1:
The patent describes a universal return electrode designed to be used with patients of substantially any size, replacing the need for multiple sized electrodes. The electrode achieves this through a standardized design that maintains safe current density across different patient populations, thereby reducing device complexity while preserving patient safety.
Solution Approach 2:
The electrode incorporates adjustable impedance characteristics that can be modified to optimize performance for different patient sizes. By changing the electrical parameters of the electrode rather than its physical dimensions, the system achieves versatility without requiring multiple electrode sizes, thus reducing complexity.
2Reliability
If sticky pads are used to ensure adequate contact, then patient burn risk is reduced, but surgical costs increase due to disposable nature
Solution Approach 1:
The patent acknowledges that disposable sticky pads have been used to prevent burns but notes the high cost. The invention provides a reusable alternative that maintains burn prevention capabilities while eliminating the need for repeated purchases, thereby reducing surgical costs associated with disposable materials.
3Adaptability or versatility
If adult sized electrode is used on baby, then electrode availability is improved, but current density increases causing burns
Solution Approach 1:
The universal electrode incorporates adjustable impedance parameters that allow it to adapt to different patient sizes. When used on smaller patients, the electrode's electrical characteristics are modified to maintain safe current density levels, preventing burns while preserving versatility across patient populations.
4Reliability
If power settings are limited to control current density, then patient safety is improved, but surgical effectiveness decreases
Solution Approach 1:
The electrode is designed with self-limiting characteristics that automatically control current density without requiring external power limitations. The electrode's inherent electrical properties ensure safe current distribution, allowing the ESU to operate at full power settings while the electrode itself prevents excessive current density, thus maintaining both safety and surgical effectiveness.
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 universal safety electrosurgical return electrode ensures safe and effective electrosurgical procedures across various patient sizes without the need for multiple electrode sizes or complex monitoring systems, reducing the risk of burns and operational complexities.
Implementation Method 1
If a relatively high current density is produced at the return electrode, the temperature of the patient's skin and tissue will rise in this area and can result in an undesirable patient burn
Implementation Method 2
medical procedures of cutting tissue and/or cauterizing leaking blood vessels are performed by utilizing radio frequency (RF) electrical energy
Data Source
Figure 1~2A
Figure 2B~3
Figure 4~5
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.