PEO-Coated Thermal Cutting Element for Precise Tissue Severing
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Solution Overview
Problem
Existing surgical instruments face challenges in accurately severing treated tissue after energy-based tissue treatment, as they rely on mechanical knives or inefficient energy-based cutting methods.
Innovation Solution
A thermal cutting element is developed, featuring a Plasma Electrolytic Oxidation (PEO) coated substrate with a heating element that connects to different electrical potentials, allowing for precise thermal cutting of tissue, integrated into a surgical instrument's jaw member with a tissue-treating plate and attachment flange for secure placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mechanical knife is used to cut tissue after energy-based treatment, then the tissue can be severed, but the precision and accuracy of cutting is compromised
Solution Approach 1:
The patent replaces the mechanical knife system with an energy-based thermal cutting element that uses electrical resistance heating to sever tissue. This substitution eliminates the need for mechanical blade advancement between jaw members, thereby improving cutting precision while maintaining manageable device complexity through integrated heating elements.
Solution Approach 2:
The thermal cutting element serves multiple functions: it provides cutting capability after energy-based treatment, integrates directly into the jaw member structure, and eliminates the need for separate mechanical knife mechanisms. This multi-functionality improves precision while streamlining the overall instrument design.
2Productivity
If conventional energy-based cutting methods are used, then tissue can be severed, but the efficiency and effectiveness of cutting is insufficient
Solution Approach 1:
The patent employs controlled electrical resistance heating with adjustable power delivery to optimize cutting performance. By varying electrical parameters (voltage, current, pulse duration) applied to the heating element, the system achieves efficient and reliable tissue severing with predictable thermal effects.
Solution Approach 2:
The thermal cutting element utilizes pulsed or cyclic electrical energy delivery to heat and sever tissue efficiently. This periodic activation allows controlled thermal accumulation while preventing excessive heat buildup, thereby improving both cutting efficiency and reliability.
3Manufacturing precision
If a thermal cutting element with PEO coating is used, then cutting precision is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent uses a composite structure consisting of a substrate material (e.g., aluminum or stainless steel) coated with a Plasma Electrolytic Oxidation (PEO) ceramic layer. This composite provides precise dimensional stability and controlled thermal properties while using established coating technologies that balance manufacturing feasibility with performance requirements.
Solution Approach 2:
The PEO coating is applied selectively to specific regions of the heating element where precise thermal control and tissue interaction are required. This localized treatment achieves manufacturing precision where needed while keeping the overall manufacturing process manageable through selective rather than universal complex treatment.
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 effectively and efficiently severs treated tissue using controlled thermal energy, providing a reliable and precise method for tissue cutting within surgical instruments, enhancing surgical precision and safety.
Implementation Method 1
a heating element disposed on the PEO coating and including first and second end portions adapted to connect to different potentials of electrical energy to heat the heating element
Implementation Method 2
a Plasma Electrolytic Oxidation (PEO) coating disposed on the substrate
Data Source
AI summary
A thermal cutting element for a surgical instrument includes a substrate, a Plasma Electrolytic Oxidation (PEO) coating disposed on the substrate, and a heating element disposed on the PEO coating and including first and second end portions adapted to connect to different potentials of electrical energy to heat the heating element. A jaw member of a surgical instrument includes a structural frame including a proximal flange portion and a distal body portion, a jaw housing surrounding the distal body portion of the structural frame, a tissue-treating plate disposed atop the jaw housing and defining a longitudinal slot therethrough along at least a portion of a length thereof, and the thermal cutting element disposed within the longitudinal slot.