Illuminated Suction Tube Waveguide to Minimize Surgical Heat
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Solution Overview
Problem
Conventional surgical illumination devices, such as headlamps and microscopes, often provide inadequate lighting due to poor directionality and anatomical obstructions, while integrated fiber-optic suction devices suffer from inefficiencies leading to heat and light loss at interfaces, posing safety hazards.
Innovation Solution
An illuminated suction apparatus with a metal suction tube surrounded by an optical cladding and an integrated illumination waveguide made of optical-grade polymer, using total internal reflection to transmit high-intensity light efficiently, eliminating non-transmissive zones and reducing heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If fiber optic cables are used to provide illumination in suction devices, then some level of illumination is achieved, but light losses at interfaces produce excessive heat causing thermal damage and fire hazards
Solution Approach 1:
The patent extracts the fiber optic cable from the suction device and replaces it with a solid-state waveguide made of optical-grade polymer. This removes the problematic fiber-to-fiber coupling interfaces that generate heat, while maintaining illumination functionality through total internal reflection in the waveguide structure.
Solution Approach 2:
The patent substitutes the mechanical fiber optic cable system with a solid-state waveguide system. The waveguide uses optical principles (total internal reflection) rather than mechanical fiber coupling, eliminating the interface losses that convert light energy into harmful heat.
2Use of energy by moving object
If fiber optic cables with high intensity light are used, then illumination is provided, but light losses at interfaces produce heat representing a fire hazard
Solution Approach 1:
The patent converts the potential harm of high-intensity light (which would generate heat at fiber interfaces) into a benefit by using solid-state waveguide technology. The same high-intensity light that would normally create fire hazards is now efficiently transmitted through the waveguide with minimal loss, providing bright illumination without dangerous heat generation.
3Illumination intensity
If conventional illumination sources like headlamps or microscopes are used, then lighting is provided, but the light is poorly directed or blocked by anatomical structures
Solution Approach 1:
The patent merges the illumination function with the suction device by integrating the waveguide directly into the suction catheter. This combination allows the light to be delivered precisely to the surgical site through the distal end of the suction device, improving directionality and eliminating the need for separate headlamps or microscopes that are blocked by anatomy.
4Loss of energy
If fiber optic cables are used in suction devices, then illumination is achieved, but light losses at interfaces reduce overall illumination efficiency
Solution Approach 1:
The patent replaces the mechanical fiber optic cable system with a solid-state waveguide. This substitution eliminates the multiple fiber-to-fiber coupling interfaces where light loss occurs, achieving superior illumination efficiency through total internal reflection in the waveguide structure.
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 ergonomic, high-intensity illumination directly to the surgical site, minimizing heat and glare, and allows customizable light profiles, enhancing surgical visibility and safety.
Implementation Method 1
The optical waveguide may have a refractive index between 1.46 and 1.7 and may have a numerical aperture between .33 and .70. The illumination waveguide serves to conduct light around the suction tube from the proximal end to the distal end of the illumination waveguide.
Data Source
Figure 1A~1B
Figure 2~2A
Figure 3~4
AI summary
An illuminated suction apparatus including a hand-held surgical device combining a high-performance non-fiber optic optical waveguide with suction. This device is useful in a wide array of surgical procedures including open and minimally invasive orthopedics. The illuminated suction device includes a metal or non-metallic suction tube having a proximal end and a distal end connected by a central portion. The proximal end of the suction tube is provided with fittings for connection to a vacuum source. The suction tube has an inner surface and an outer surface, with a layer of optical cladding having a refractive index that may be between 1.29 and 1.67 on the outer surface of the central section of the suction tube, and an illumination waveguide having a proximal end and a distal end.