Cyclo Olefin Polymer Waveguide for Surgical Illumination
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Solution Overview
Problem
Conventional surgical illumination systems face challenges with heat buildup, mechanical limitations, and optical property degradation due to excessive heat, weight, and sterilization methods, leading to suboptimal performance and safety concerns during medical procedures.
Innovation Solution
The use of cyclo olefin copolymer (COC) or cyclic olefin polymer (COP) materials for surgical retraction and illumination systems, which provide improved light transmission efficiency, mechanical strength, and resistance to heat and moisture, while maintaining optical stability and biocompatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high intensity incandescent lighting is used for surgical illumination, then illumination intensity is improved, but heat generation increases causing unwanted coagulation of blood and heating of patient's body
Solution Approach 1:
The patent transitions from incandescent lighting to LED lighting, fundamentally changing the illumination source parameter. LEDs provide high illumination intensity while generating minimal heat, thus resolving the contradiction between illumination intensity and heat generation. The LED light source operates at lower temperatures while maintaining or improving illumination quality.
Solution Approach 2:
The patent replaces the thermal-based incandescent lighting system with an electroluminescent LED system. This substitution eliminates the need for high-temperature operation to achieve bright illumination, thereby reducing heat generation and associated harmful effects while maintaining illumination intensity.
2Reliability
If conventional waveguide materials are used for light conduction, then light transmission is achieved, but transmission characteristics become unstable under extended use and during sterilization
Solution Approach 1:
The patent employs a composite construction where an optical waveguide is integrated within a catheter assembly that includes multiple functional layers. The waveguide is surrounded by a protective sheath and integrated with radiopaque markers and distal protection mechanisms. This composite structure protects the waveguide during sterilization and extended use, maintaining transmission stability while enabling repeated sterilization cycles and long-duration procedures.
Solution Approach 2:
The patent incorporates a protective sheath or coating around the optical waveguide before it undergoes sterilization or extended use. This pre-applied protective layer cushions the waveguide against thermal stress during sterilization and mechanical stress during prolonged procedures, preventing degradation of transmission characteristics and enabling reliable performance over extended durations.
3Reliability
If precision optical polymers are used for waveguide fabrication, then optical properties are improved, but mechanical properties are limited restricting application in medical situations
Solution Approach 1:
The patent integrates the precision optical polymer waveguide within a composite catheter assembly that includes a support structure made of more mechanically robust materials. The waveguide is embedded or surrounded by a protective sheath that provides mechanical strength and flexibility, allowing the system to withstand bending, compression, and sterilization processes while the optical polymer maintains its superior light transmission properties.
Solution Approach 2:
The patent applies different material properties to different parts of the device: the waveguide core uses precision optical polymer for optimal light transmission, while the surrounding sheath and support structures use materials with enhanced mechanical properties. This local differentiation allows each component to excel at its primary function while the composite assembly achieves both optical and mechanical reliability required for medical applications.
4Loss of energy
If acrylic is used for waveguide fabrication, then light transmission efficiency is improved compared to polycarbonate, but acrylic is brittle and can shatter and has low glass transition temperature making it intolerant to heat buildup
Solution Approach 1:
The patent replaces the acrylic waveguide with a optical waveguide made from heat-resistant optical polymer or glass that maintains high light transmission efficiency while tolerating higher temperatures. The waveguide is integrated within a composite catheter assembly that includes thermal management features and protective sheathing, enabling the system to withstand heat buildup during sterilization and prolonged use without deformation or degradation of optical properties.
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 COP-based systems offer enhanced light transmission, mechanical durability, and resistance to heat and moisture, ensuring effective and safe illumination during surgical procedures without compromising optical properties or biocompatibility.
Implementation Method 1
The waveguide is formed of a cyclo olefin copolymer (COC) or a cyclo olefin polymer (COP) and conducts light from the proximal end to the distal end
Data Source
AI summary
An illuminated medical system comprises a medical instrument and a light transmitting waveguide. The waveguide projects lights from a distal portion of the waveguide toward a target area. The waveguide is formed primarily of a cyclic olefin copolymer or a cyclic olefin polymer.