Tissue Marking Composition for Fast Drying and Crisp Edges

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Solution Overview

Problem

Existing tissue marking compositions fail to accurately adhere to irregularly shaped tissues, migrate, and are not distinguishable under different lighting conditions, leading to potential false positives and unnecessary surgeries.

Innovation Solution

A marking composition comprising a film-forming resin, rheology modifier, and colorant with specific viscosity and rheology modifier amounts, ensuring quick drying and secure adhesion without migration, and distinct color differentiation under various lighting conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the marking composition dries slowly, then it has sufficient time to adhere properly to the tissue, but the composition smears or migrates on the tissue surface affecting marking fidelity

Engineering Contradiction:

Improvemarking fidelityVSAvoiddrying speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The patent optimizes the viscosity parameters of the marking composition (specifically 70-110 Krebs Units at room temperature) and controls the composition of film-forming resins and rheology modifiers to achieve the desired balance between drying speed and migration prevention. This parameter optimization allows the composition to dry quickly while maintaining marking fidelity.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If the marking composition migrates to an unintended location on the tissue surface, then the marking accuracy is compromised, but increasing adhesion strength may cause the composition to run or drip

Engineering Contradiction:

Improvemarking accuracyVSAvoidapplication control

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent carefully controls the viscosity parameters (70-110 Krebs Units) and the composition of rheology modifiers to prevent both migration and running/dripping. This optimized parameter range ensures the composition remains controllable during application while preventing unwanted migration to unintended locations.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The marking composition uses a composite formulation combining specific film-forming resins with rheology modifiers (associative polyurethane, phyllosilicate, or cellulose) to achieve the desired balance between adhesion and flow control. This composite material approach allows simultaneous prevention of migration and running.

Inventive Principle:

Principle #40Composite materials

3Reliability

If the marking composition migrates into a fissure or crevasse in the tissue, then the pathology report may show a false positive, but increasing penetration ability may cause the composition to spread beyond the intended marking area

Engineering Contradiction:

Improvemargin status accuracyVSAvoidmarking precision

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent optimizes viscosity (70-110 Krebs Units) and surface tension characteristics of the marking composition to allow controlled entry into fissures and crevasses for accurate margin marking, while preventing excessive spread beyond the intended marking area. This parameter control ensures reliability in margin status determination.

Inventive Principle:

Principle #35Parameter changes

4Reliability

If the marking composition does not adhere quickly and securely, then accurate analysis in the pathology lab is compromised, but rapid adhesion may cause the composition to dry too fast for proper application

Engineering Contradiction:

Improveadhesion reliabilityVSAvoidapplication time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent optimizes the viscosity parameters (70-110 Krebs Units) and film-forming resin composition to achieve rapid adhesion and drying (within minutes) while ensuring secure and reliable marking. This parameter optimization allows sufficient application time while achieving quick drying for accurate pathology analysis.

Inventive Principle:

Principle #35Parameter changes

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 composition provides accurate tissue marking with crisp edges, rapid drying, and clear color distinction, reducing false positives and improving surgical precision.

Implementation Method 1

a rheology modifier comprising an associative polyurethane, a phyllosilicate, a cellulose, or a combination thereof

Methodology Applied

Scientific EffectRheology modification:

Implementation Method 2

a film forming resin comprising an acrylic resin

Methodology Applied

Scientific EffectFilm formation:

Data Source

PatentUS12473443B2Compositions for marking tissue and methods of making the same

Publication Date: 2025.11.18 VECTOR SURGICAL LLC

AI summary

A marking composition for marking a tissue specimen is provided. The marking composition includes a film forming resin including an acrylic resin, a rheology modifier including an associative polyurethane, a phyllosilicate, a cellulose, or a combination thereof, and a colorant. The composition has a viscosity of about 70 KU to about 110 KU at room temperature. If the composition includes a rheology modifier comprising cellulose, it is in an amount of about 0.01 wt % to about 0.25 wt % based on the total weight of the composition.