Photobiomodulation Light Source Device for Stroke Hemiplegia

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Solution Overview

Problem

Stroke survivors often experience hemiplegia, leading to impaired functional mobility due to muscle weakness, spasticity, and joint pain, which current treatments inadequately address.

Innovation Solution

The use of photobiomodulation therapy (PBMT) with a light source device that includes a cluster of light delivery sources, a permanent magnet, a processing unit, and a power source, applied in pulsed, continuous, or super-pulsed modes to stimulate a phototherapeutic response in muscles affected by hemiplegia.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional treatments are used for hemiplegia, then basic medical care is provided, but functional mobility and muscle strength are inadequately improved

Engineering Contradiction:

Improvefunctional mobility improvementVSAvoiddaily activity capability

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent replaces conventional mechanical rehabilitation methods with photobiomodulation therapy using light energy. The light source device delivers specific wavelengths (630nm, 810nm, 905nm) to stimulate cellular processes, achieving functional mobility improvement through optical-biological interactions rather than mechanical intervention

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention applies specific light parameters (wavelengths of 630nm, 810nm, and 905nm; power density of 50-200 mW/cm²; treatment duration of 10-20 minutes) to achieve therapeutic effects. These parameter changes target cellular cytochrome c oxidase to enhance ATP production, reduce inflammation, and improve muscle function in hemiplegic patients

Inventive Principle:

Principle #35Parameter changes

2Reliability

If multiple light sources with different wavelengths are used, then therapeutic effectiveness is enhanced, but device complexity increases

Engineering Contradiction:

Improvephototherapeutic responseVSAvoidlight source configuration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines three different light sources (630nm red light, 810nm near-infrared, and 905nm infrared) into a single integrated light source device. This merging allows simultaneous delivery of multiple wavelengths to different tissue depths, enhancing therapeutic effectiveness while maintaining a unified device structure

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The light source device is designed with multi-functionality to address various aspects of hemiplegia treatment. It can target different tissue depths and physiological processes using different wavelengths, making it a universal therapy device for muscle strength, nerve conduction, and inflammation management

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12296187B2Photobiomodulation therapy to improve functional mobility of stroke survivors

Publication Date: 2025.05.13 MEDICAL QUANT USA MULTI RADIANCE MEDICAL

AI summary

Photobiomodulation therapy (PBMT) can be used to improve functional mobility of stroke survivors. A light source device can be contacted to a subject's skin proximal to an area of hemiplegia within a subject due to the stroke. A light signal (with wavelengths from the red to infrared part of the spectrum) can be applied in at least one of a pulsed operating mode, a continuous operating mode, and a super-pulsed operating mode through the light source device to the area of hemiplegia. The light signal is applied for a time sufficient to stimulate a phototherapeutic response in the area of hemiplegia to improve the functional mobility of the subject.