Raman Scattering for Cartilage Crosslinking Quantification

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Solution Overview

Problem

Current diagnostic tools lack the ability to effectively detect early stages of osteoarthritis, leading to limited treatment options and significant quality of life impacts for patients, as existing methods are either invasive or lack quantitative analysis for cartilage crosslinking changes.

Innovation Solution

A method utilizing Raman scattering to generate spatially-resolved quantification of cross-linking in cartilage, allowing for the detection of early osteoarthritis by measuring specific Raman spectrum peaks corresponding to cartilage crosslinking moieties, particularly pyridinium-type crosslinks, using Raman micro-spectroscopy and fiber optic probes for non-invasive, in vivo analysis.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If current diagnostic tools are used, then detection of early osteoarthritis is limited, but invasive procedures or major interventions are required

Engineering Contradiction:

Improvedetection capabilityVSAvoidinvasiveness

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent replaces mechanical/invasive diagnostic procedures with optical detection methods. Specifically, it uses Raman spectroscopy and second harmonic generation (SHG) imaging to detect collagen crosslinking changes in cartilage non-invasively, substituting surgical biopsies or joint replacements with light-based molecular imaging that can identify early osteoarthritis before symptoms appear

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces optical probes and spectroscopic techniques as intermediaries between the diagnostic system and the cartilage tissue. These optical tools act as mediators that can penetrate and analyze cartilage collagen structure without direct mechanical contact or invasion, enabling early detection of molecular changes associated with osteoarthritis

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If quantitative analysis of cartilage crosslinking is implemented, then early osteoarthritis detection is enabled, but device complexity increases

Engineering Contradiction:

Improvequantitative analysis capabilityVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent employs multi-functional optical probes that can perform both Raman spectroscopy and second harmonic generation imaging simultaneously or sequentially. This universal approach allows a single device to provide both molecular composition analysis (quantifying collagen crosslinking) and structural imaging, reducing the need for multiple separate complex systems while enabling comprehensive early osteoarthritis detection

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent utilizes changes in optical parameters (Raman shift frequencies, SHG signal intensity) to quantify collagen crosslinking density. By monitoring specific spectral parameters and their variations, the system can quantitatively assess cartilage degradation without requiring complex mechanical testing equipment or invasive measurements

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11497403B2Devices, methods, and systems for detection of collagen tissue features

Publication Date: 2022.11.15 THE TRUSTEES OF COLUMBIA UNIV IN THE CITY OF NEW YORK

AI summary

The present application discloses methods, devices, and systems for generating spatially-resolved quantification of cross-linking in cartilage based on Raman scattering of excitation light. The examples presented demonstrate that the method provides a discriminating power sufficient to distinguish early onset of osteo-arthritis even before a patient is symptomatic.