Surgical Light Diffuser with Reflective Shell
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Solution Overview
Problem
Existing surgical lighting solutions are cumbersome, costly, and cause glare and shadows, interfering with the surgical site visibility and posing safety risks due to heat and electrical hazards.
Innovation Solution
A surgical-site lighting device that connects to an existing light source and uses a molded plastic shell with an inner reflective surface to distribute light evenly around the surgical site, preventing glare and reflections, and is designed to be inexpensive and easy to manufacture without the need for bulbs or electrical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If overhead lights are used to illuminate the surgical site, then the surgical site receives light, but the lights cause glare and shadows simultaneously
Solution Approach 1:
The lighting system is segmented into multiple directional light sources arranged around the surgical site, with each segment providing illumination from a specific angle. This segmentation allows the light to be distributed in a controlled manner that eliminates shadows while preventing glare to the surgeon's eyes and monitors.
Solution Approach 2:
The lighting device provides different lighting qualities at different locations: direct illumination toward the surgical site and controlled reflection away from the surgeon's line of sight. The local quality of light (direction, intensity, angle) is optimized for each specific area to achieve shadow-free illumination without glare.
2Illumination intensity
If head lamps are used to illuminate the surgical site, then the surgical site is illuminated, but the lamps cast shadows of hands or instruments
Solution Approach 1:
Instead of a single centralized light source that casts shadows, the system uses multiple segmented light sources positioned around the surgical site. Each light source illuminates a specific zone, and the combined effect provides uniform illumination that eliminates shadows cast by hands and instruments.
Solution Approach 2:
The lighting system transitions from a single-point (0D) or linear (1D) light source to a distributed array of light sources in two or three dimensions around the surgical site. This dimensional expansion allows light to reach all areas simultaneously from multiple angles, eliminating shadows.
3Illumination intensity
If small lamps with bulbs or LEDs are used, then localized illumination is achieved, but the devices become costly and complicated with multiple connections and bulky fixtures
Solution Approach 1:
Multiple light sources, mounting structures, and control mechanisms are merged into a single integrated device that attaches to the surgical instrument. This consolidation eliminates the need for separate bulbs, batteries, wiring, and mounting fixtures, reducing complexity while maintaining localized illumination.
Solution Approach 2:
The lighting device is designed with universal mounting capabilities that can attach to various surgical instruments without requiring instrument-specific modifications. The single device performs multiple functions: providing illumination, mounting securely, and eliminating the need for separate power sources or control systems.
4Illumination intensity
If light sources are incorporated into complex structures, then localized illumination is achieved, but manufacturing costs increase significantly
Solution Approach 1:
The lighting device is designed as a disposable or single-use component that can be manufactured inexpensively using molded plastic. This approach eliminates the need for expensive precision machining, complex assemblies, or durable materials, significantly reducing manufacturing costs while providing effective localized illumination during the surgical procedure.
Solution Approach 2:
The device transitions from using traditional bulb-based illumination to LED-based illumination, changing the light source parameter to enable smaller, cheaper, and more energy-efficient lighting. This parameter change allows the use of simple molded plastic housings instead of complex metal structures, reducing manufacturing costs.
5Illumination intensity
If traditional light fixtures with bulbs are used, then illumination is provided, but the bulbs generate heat that becomes a safety risk
Solution Approach 1:
The lighting system changes the light source parameter from incandescent bulbs to LEDs, which operate at much lower temperatures. This parameter change fundamentally reduces heat generation while maintaining or improving illumination efficiency, eliminating the safety risk associated with hot bulbs near surgical sites.
Solution Approach 2:
The system replaces the thermal-mechanical light generation process (incandescent bulbs converting electrical energy to light through heat) with an electroluminescence process (LEDs converting electrical energy directly to light with minimal heat). This substitution eliminates the harmful thermal byproduct while maintaining illumination.
6Illumination intensity
If any light source is used, then the surgical site is illuminated, but glares and reflections occur that are blinding or distracting
Solution Approach 1:
The lighting device provides different local qualities of light: direct illumination toward the surgical site with controlled intensity and angle, and reflected light directed away from the surgeon's line of sight. Each location receives light with the appropriate quality to prevent glare while maintaining illumination of the surgical field.
Solution Approach 2:
Instead of allowing light to reflect directly back toward the surgeon (which causes glare), the device inverts the reflection direction by using angled reflective surfaces to redirect light away from the surgeon's eyes and monitors. This inversion of the reflection path eliminates glare while preserving 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 device provides effective, shadow-free illumination of the surgical site, reducing the risk of glare and heat while being cost-effective and safe for use, enhancing surgical efficiency and safety by minimizing the need for overhead lighting and reducing the complexity of surgical procedures.
Implementation Method 1
light from the source is reflected within the device and emitted onto the site
Implementation Method 2
the outer shell of the device provides a substantially opaque shield that prevents the light from causing glares and reflections
Data Source
AI summary
Systems, devices and methods for illuminating sites (e.g., surgical sites) are provided. An illumination device (e.g., a surgical site light) includes a body (e.g., a plastic body) with a cross-sectional shape similar to an inward-facing asymmetrical C, and wherein the body is shaped to be placed proximal to a site (e.g., surgical site) and emit light onto the site from a plurality of directions while inhibiting the light from radiating away from the outside of the body.