Blade Insert Illuminator Waveguide Design
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Solution Overview
Problem
Current surgical illumination techniques, particularly using fiber optic devices integrated into blade retractors, suffer from inadequate illumination of deep tissues due to limited light emission area, diffuseness, and susceptibility to debris or blood obstruction, leading to inefficient light transmission and high power requirements for external light sources.
Innovation Solution
A blade insert illuminator system comprising light input, conducting, and output portions made from suitable materials like acrylic or polycarbonate, designed to minimize light loss through total internal reflection and optimized optical structures, allowing efficient light transfer from external sources to the surgical field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If fiber optic devices are integrated into blade retractors to illuminate deep tissue, then illumination of deep tissue is achieved, but the light emission area is very small and requires constant repositioning
Solution Approach 1:
The illumination system is divided into multiple segments: a light source component, a light conducting portion (waveguide), and a light output portion with optical structures. This segmentation allows each component to be optimized independently, with the light conducting portion maintaining a fixed position while the light output portion can be positioned at different locations along the blade retractor channel.
Solution Approach 2:
The patent transitions from point-source illumination (fiber optic tip) to distributed linear illumination by introducing a light conducting portion that extends along the blade channel. This dimensional change from a single point to a distributed structure allows illumination at multiple positions without requiring constant repositioning of the light source.
2Illumination intensity
If fiber optic devices are used for illumination, then deep tissue illumination is provided, but the light is very diffuse and does not adequately illuminate the tissue of interest
Solution Approach 1:
The light output portion incorporates specially designed optical structures (such as light directing elements or output windows) that are specifically configured to direct light toward the tissue of interest. This local optimization ensures that light is delivered effectively to the specific area where surgery is being performed, rather than providing diffuse illumination throughout the entire field.
3Illumination intensity
If fiber optic devices are used for illumination, then deep tissue illumination is achieved, but the emission area is very small and any debris or blood will block the majority of illumination
Solution Approach 1:
The patent combines multiple light conducting portions into a single integrated illumination system that spans a significant portion of the blade retractor channel. This merging of light conducting elements creates a distributed illumination system where multiple light paths work together, ensuring that if one path is partially blocked by debris or blood, other paths can still provide illumination, thereby maintaining reliability.
4Ease of manufacture
If external illumination sources such as ceiling or wall mounted lights are used, then illumination is provided, but the illumination of deep tissue is poor
Solution Approach 1:
The patent introduces a light conducting portion (waveguide) as an intermediary between the external light source and the deep tissue. This intermediary component captures light from external sources and efficiently transmits it through the blade retractor channel to the deep tissue, solving the problem of poor illumination depth while maintaining the simplicity of using external light sources.
5Illumination intensity
If fiber optic systems are used for illumination, then deep tissue illumination is provided, but the system is very expensive and requires specialized cutting, grinding and polishing
Solution Approach 1:
The patent changes the material parameters by using optical plastics (such as acrylic or polycarbonate) instead of traditional glass fiber optics. These plastic materials can be easily molded and manufactured using standard manufacturing processes, eliminating the need for specialized cutting, grinding, and polishing operations, while still providing effective deep tissue illumination.
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 system provides improved illumination with reduced light loss, enabling the use of lower power LEDs, minimizing heat generation and cost, and enhancing usability by allowing modular and customizable light delivery to specific areas of interest.
Implementation Method 1
The light conducting portion of a blade insert illuminator typically is responsible for conducting light from the light input section to the light output section. It may be simply a section of optical material designed to support total internal reflection
Implementation Method 2
The light output portion of a blade insert illuminator contains specially designed output optical structures that allow light to be extracted from the illuminator to shine onto a predetermined area of interest
Data Source
AI summary
A blade insert illumination system includes one or more illumination elements composed of a transparent or semitransparent polymer that is preferably biocompatible and sterilizable. The illumination elements operate as a waveguide and may incorporate optical components such as, for example, facets, lenses, gratings, prisms and or diffusers to operate as precision optics for customized delivery of the light energy. The illumination elements may be modular, allowing components to be mixed and matched for different sizes of blade retractors, or may be a single integrated unit.