Tissue Marking Composition for Irregular Specimens Without Smearing

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Solution Overview

Problem

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

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 to various tissue types without migration, and providing clear color differentiation under both reflective and transmitted light.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional marking compositions are applied to irregularly shaped tissue specimens, then the tissue can be marked, but the marking composition migrates or smears leading to inaccurate marking

Engineering Contradiction:

Improvemarking accuracyVSAvoidmigration and smearing

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the viscosity parameter of the marking composition to approximately 70-110 KU at room temperature, and controls the rheology modifier content (associative polyurethane 0.01-1.0 wt%, phyllosilicate 0.01-2.0 wt%, or cellulose 0.01-0.25 wt%) to achieve optimal balance between flowability and resistance to migration, preventing smearing while allowing proper application on irregular tissue surfaces

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses a composite formulation combining film forming resin (acrylic resin), rheology modifier (associative polyurethane, phyllosilicate, or cellulose), and colorant in specific proportions to create a marking composition that maintains structural integrity on irregular tissue surfaces while preventing migration and smearing

Inventive Principle:

Principle #40Composite materials

2Reliability

If the marking composition dries quickly, then adhesion is improved and migration is prevented, but the composition may not have enough time to penetrate and adhere to irregular tissue surfaces

Engineering Contradiction:

Improveadhesion strengthVSAvoiddrying time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent optimizes the viscosity parameter (70-110 KU) and rheology modifier concentration to control the drying rate, allowing sufficient time for the composition to penetrate and adhere to irregular tissue surfaces while preventing excessive migration before complete drying

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces purely evaporative drying mechanisms with a controlled rheological system where the associative polyurethane, phyllosilicate, or cellulose modifiers create a gel-like structure that slows evaporation and extends the effective adhesion window, allowing the marking composition to bond to irregular surfaces before final drying

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If the marking composition is applied to ensure accurate marking, then tissue margin status can be determined, but false positives occur due to migration into fissures or crevasses

Engineering Contradiction:

Improvemargin status identificationVSAvoidfalse positives

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent changes the viscosity to 70-110 KU and controls rheology modifier content to prevent the marking composition from penetrating into fissures and crevasses of irregular tissue surfaces, ensuring markings remain on the exterior surface only, thereby eliminating false positives in margin status identification

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses a disposable marking composition with controlled rheological properties that sets quickly and permanently on the tissue surface, preventing any subsequent migration or smearing that could lead to false positives, ensuring single-use accuracy without requiring re-marking

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

4Reliability

If conventional marking compositions are used, then marking can be applied, but color differentiation is not distinct under different lighting conditions

Engineering Contradiction:

Improvecolor distinguishabilityVSAvoidlighting condition dependence

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

The patent selects colorants with high contrast and distinct spectral characteristics that maintain clear differentiation under both reflected ambient light and transmitted light, ensuring accurate color identification regardless of lighting conditions in the operating room or pathology lab

Inventive Principle:

Principle #32Color 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 achieves high adherence and distinct color recognition, reducing false positives and ensuring accurate surgical resection by maintaining marking integrity on diverse tissues, including fatty, bone, and muscle, and withstands pathological processing.

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 EffectAdhesion: Adhesive

Data Source

PatentUS20260042922A1Compositions for marking tissue and methods of making the same

Publication Date: 2026.02.12 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.