Thermal Cutting Element for Electrosurgical Instruments

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Solution Overview

Problem

Existing surgical instruments face challenges in accurately severing treated tissue after energy-based treatments, as they rely on mechanical knives which may not efficiently cut through treated tissue.

Innovation Solution

The development of an end effector for surgical instruments featuring a thermal cutting element that is electrically conductive, independently activatable, and exposed along the jaw housing, with a beveled surface or cutting spine to facilitate tissue dissection and cutting, which can be connected to an electrosurgical energy source for precise tissue cutting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a mechanical knife is used to cut treated tissue, then the tissue can be severed, but the cutting efficiency is insufficient and precision is reduced

Engineering Contradiction:

Improvecutting efficiencyVSAvoidcutting precision

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent replaces the mechanical knife system with an energy-based thermal cutting element that uses electrosurgical energy to cut tissue. This substitution eliminates the limitations of mechanical cutting while maintaining precision through controlled energy delivery to the tissue cutting surface.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the cutting mechanism from mechanical force to thermal energy by applying electrosurgical parameters. The thermal cutting element uses controlled temperature and energy delivery to achieve precise tissue cutting, improving both efficiency and precision compared to mechanical methods.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If a thermal cutting element is integrated into the electrosurgical forceps, then tissue cutting capability is enhanced, but the device complexity increases

Engineering Contradiction:

Improvetissue cutting capabilityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the thermal cutting element with the electrosurgical forceps by integrating it into the jaw members. This combination allows the forceps to perform both clamping and thermal cutting functions, enhancing versatility while managing complexity through unified design.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The electrosurgical forceps is designed with multi-functionality, incorporating both mechanical clamping and thermal cutting capabilities in a single device. The jaw members can perform sealing, cutting, and dissection functions, reducing the need for separate instruments.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If the thermal cutting element is exposed along the jaw housing, then tissue dissection capability is improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improvetissue dissection capabilityVSAvoidexposure precision

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The patent applies local quality by exposing the thermal cutting element only at specific portions of the jaw housing where tissue dissection is needed. This selective exposure provides enhanced dissection capability at critical locations while maintaining manufacturing feasibility through localized precision requirements.

Inventive Principle:

Principle #3Local quality

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 thermal cutting element allows for efficient and precise cutting of treated tissue, reducing the need for mechanical knives and enhancing the ability to dissect and score tissue effectively, improving surgical precision and efficiency.

Implementation Method 1

thermal cutting element... adapted to connect to an electrosurgical energy source... configured to facilitate tissue dissection upon activation

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

thermal cutting element... configured to facilitate tissue dissection upon activation... exposed distal end extending through a distal end of the jaw housing

Methodology Applied

Scientific EffectThermal ablation: Ablation

Data Source

PatentUS20230310063A1Thermal cutting elements, electrosurgical instruments including thermal cutting elements, and methods of manufacturing

Publication Date: 2023.10.05 COVIDIEN LP

AI summary

An end effector assembly for an electrosurgical instrument includes a pair of opposing jaw members each having a jaw housing supporting an electrically conductive tissue engaging surface thereon disposed in opposition relative to one another. The electrically conductive tissue engaging surfaces are adapted to connect to an electrosurgical energy source. A thermal cutting element is disposed the electrically conductive tissue engaging surface and is independently activatable relative to the electrically conductive tissue engaging surfaces and is adapted to connect to the electrosurgical energy source. The thermal cutting element is exposed along the length of the electrically conductive tissue engaging surface and includes an exposed distal end extending through a distal end of the jaw housing. The exposed distal end of the thermal cutting element is configured to facilitate tissue dissection upon activation thereof.