Fluorescein Sodium Formulation for Cervical Lesion Detection

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Solution Overview

Problem

Current diagnostic methods for cervical cancer, such as colposcopy using acetic acid, suffer from low specificity, high false positive and false negative rates, and require extensive expertise, leading to inadequate detection and treatment of high-grade lesions, particularly in resource-constrained settings.

Innovation Solution

An optimized Fluorescein Sodium (FNa) formulation is developed as a contrast agent, adjusted for pH, osmolality, and tonicity, and applied topically to enhance fluorescence imaging for precise identification of cervical lesions, allowing for improved visualization and discrimination between high-grade and low-grade lesions without the need for extensive training or equipment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If acetic acid is used for colposcopy, then cervical lesions can be visualized, but the method suffers from low specificity and high false positive/negative rates

Engineering Contradiction:

Improvediagnostic accuracyVSAvoidfalse positive and false negative rates

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent changes the chemical parameters of the contrast agent from acetic acid to fluorescein sodium, adjusting pH, osmolality, and tonicity to optimize diagnostic performance. This parameter change enables higher specificity and accuracy in detecting cervical lesions while reducing false positives and negatives

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the mechanical/visual assessment method of acetic acid colposcopy with fluorescence imaging technology. The fluorescein sodium contrast agent produces fluorescent signals that can be detected and imaged, substituting the subjective visual interpretation with objective fluorescence detection, thereby improving measurement precision and reliability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If acetic acid colposcopy is performed, then cervical cancer screening can be conducted, but extensive expertise is required leading to inadequate detection in resource-constrained settings

Engineering Contradiction:

Improvescreening capacityVSAvoidexpertise requirement

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The fluorescein sodium contrast agent provides self-evident fluorescent visualization of cervical lesions that is objectively detectable without requiring extensive expert interpretation skills. The fluorescence signal itself serves as the diagnostic indicator, reducing dependence on operator expertise and enabling broader implementation in resource-constrained settings

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces the expertise-dependent visual assessment system with an objective fluorescence detection system. This substitution transforms the diagnostic process from one requiring extensive training to one that can be performed with standardized protocols, thereby improving ease of operation while maintaining or enhancing productivity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If optimized Fluorescein Sodium formulation is used, then diagnostic specificity and accuracy are improved, but additional steps for adjusting pH, osmolality, and tonicity are required

Engineering Contradiction:

Improvediagnostic specificityVSAvoidformulation preparation steps

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent performs preliminary adjustments of pH, osmolality, and tonicity during the formulation preparation stage. By addressing these parameters in advance during manufacturing or pre-preparation, the complex adjustment steps are completed before clinical use, ensuring optimal diagnostic performance without adding complexity to the point-of-care procedure

Inventive Principle:

Principle #10Preliminary action

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 FNa formulation provides higher specificity and accuracy in diagnosing cervical cancer, reducing false positives and negatives, enabling precise biopsies and potentially reducing overtreatment and missed diagnoses, while being cost-effective and accessible in low-resource settings.

Implementation Method 1

Methodology Applied

Scientific EffectFluorescence: Fluorescence

Data Source

PatentUS20240358861A1Compositions and methods of fluorescein sodium for early diagnosis of cervical cancer

Publication Date: 2024.10.31 THE MOEIN FAMILY TRUST

AI summary

Methods for early diagnosis of cervical intraepithelial neoplasia in low-income settings are disclosed. This invention primarily addresses inaccurate screening and diagnosis by developing, standardizing, and optimizing an innovative, highly-effective (high specificity, high sensitivity), and low-cost Fluorescein Sodium (FNa) staining method to replace the current burdensome (requires multiple visits), inherently inaccurate (low specificity, high sensitivity) Acetic Acid (AA) staining method.