Portable Sunlight Phototherapy Device With UV/IR Filtering
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Solution Overview
Problem
Conventional phototherapy devices for treating neonatal jaundice are bulky, require power sources, and are not portable, making them unsuitable for use in developing nations where electricity is scarce, and natural sunlight therapy poses risks of UV exposure and overheating.
Innovation Solution
A portable phototherapy device that uses a flexible, transparent enclosure to filter UV and IR rays, allowing natural sunlight to be directed onto the infant without physical contact, and can be easily transported and assembled without power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional phototherapy devices use high-powered lighting in isolette tanks, then phototherapy effectiveness is improved, but device portability and ease of transport deteriorates
Solution Approach 1:
The patent replaces the mechanical/electrical high-powered lighting system with a natural sunlight-based system. The device uses a transparent enclosure to direct natural sunlight onto the infant, eliminating the need for electrical power sources, bulbs, and complex mechanical components while maintaining phototherapy effectiveness through the natural blue spectrum in sunlight.
Solution Approach 2:
The device utilizes natural sunlight as a free, self-replenishing light source that requires no external power supply, maintenance, or complex control systems. The transparent enclosure passively directs this natural light source onto the infant, making the system self-sufficient and highly portable.
2Ease of operation
If natural sunlight is used for phototherapy, then device portability and ease of use is improved, but harmful UV exposure and overheating risks increase
Solution Approach 1:
The patent introduces a transparent enclosure as an intermediary between natural sunlight and the infant. This enclosure selectively transmits beneficial blue spectrum light while blocking harmful UV rays and reducing excessive infrared radiation, thus mediating the interaction between sunlight and the infant to provide protection while maintaining therapeutic effectiveness.
Solution Approach 2:
The transparent enclosure provides localized quality control by allowing different wavelengths of light to pass through differently. It specifically permits blue spectrum light (450-470nm) to reach the infant for phototherapy while blocking UV radiation and filtering excessive infrared radiation, creating a selectively protected environment.
3Reliability
If conventional phototherapy devices require power sources, then phototherapy effectiveness is improved, but adaptability to environments without electricity deteriorates
Solution Approach 1:
The patent replaces the electrical power system with a passive optical system using natural sunlight. The transparent enclosure acts as a passive light director, eliminating all electrical components including power sources, bulbs, and control systems, thereby enabling the device to function in any environment with sunlight availability.
Solution Approach 2:
The device achieves universality by using natural sunlight as a universal light source available in most environments worldwide. The transparent enclosure provides a universal solution for directing this light, making the phototherapy device adaptable to diverse settings from rural areas without electricity to urban hospitals.
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
Provides effective phototherapy by converting unconjugated bilirubin into conjugated bilirubin, reducing the risk of complications like kernicterus, while being lightweight, easy to use, and adaptable to various environments.
Implementation Method 1
The enclosure formed around the incubator allows visible sunlight to enter the enclosure in any direction for treating the subject while partially filtering ultraviolet (UV) and infrared radiation (IR) rays of the visible sunlight
Implementation Method 2
certain wavelengths of light can isomerize the unconjugated bilirubin into conjugated bilirubin (which is water-soluble) through the skin
Data Source
AI summary
In an exemplary embodiment, a phototherapy device capable of delivering natural sunlight to a subject is provided. The phototherapy device includes a bassinet configured to hold a subject for treatment, an angular non-domed enclosure having an angled front wall and made from a flexible, transparent material connected to the incubator to create a space therein, and in some embodiments a support for supporting the bassinet. The enclosure formed around the bassinet allows visible sunlight to enter the enclosure in any direction for treating the subject while partially filtering ultraviolet (UV) and infrared radiation (IR) rays of the visible sunlight from entering the device, and is configured to direct incident IR rays out of the enclosure such that there is no build-up of heat that would harm the subject resting therein.