Infrared-Activated Tissue Marking for Tattoo Removal
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Solution Overview
Problem
Current methods for removing tattoos are invasive, costly, and pose health risks due to the need for multiple treatments and the use of hazardous materials, especially when attempting to remove multicolored tattoos, and often result in collateral damage to the skin.
Innovation Solution
Development of tissue marking compositions that can be rendered colorless using infrared radiation, eliminating the need for encapsulation, additional reactive species, and dispersal of pigments, allowing for single-treatment removal with minimal skin damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visible laser radiation is used for tattoo removal, then pigment particles can be targeted and broken down, but collateral damage occurs to the skin and surrounding tissue due to absorption of radiation by the skin
Solution Approach 1:
An intermediary substance (infrared-absorbing compound) is introduced into the tattoo ink composition. This intermediary selectively absorbs infrared radiation and converts it to heat, which then thermally degrades the pigment particles. The infrared radiation itself does not directly interact with the pigment, thus avoiding the collateral damage associated with visible laser radiation while still achieving effective tattoo removal.
Solution Approach 2:
The patent replaces the direct mechanical/optical interaction of visible laser radiation with pigment particles by substituting it with a thermal field generated through infrared absorption. Instead of using visible light that directly damages skin, the system uses infrared radiation that is converted to heat by the intermediary compound, which then indirectly destroys the pigment through thermal degradation, reducing direct radiative damage to surrounding tissue.
2Reliability
If multiple laser treatments are used for tattoo removal, then pigment particles can be dispersed by biological processes, but the process becomes costly, painful, and requires multiple sessions
Solution Approach 1:
The pigment particles are pre-loaded with infrared-absorbing compounds during the tattooing process itself. This preliminary incorporation of the heat-generating intermediary means that when infrared radiation is applied during removal, the pigment particles immediately generate heat and degrade, eliminating the need for multiple gradual treatment sessions. The removal process becomes a single-step procedure because the destructive mechanism is already in place within the pigment particles.
Solution Approach 2:
The patent fundamentally changes the removal mechanism from gradual biological dispersal after repeated mechanical disruption to immediate thermal degradation. By changing the physical-chemical state of the pigment particles (incorporating infrared-absorbing compounds) and changing the energy delivery method (using infrared radiation instead of visible laser), the process achieves complete removal in a single treatment rather than requiring multiple sessions over time.
3Reliability
If green and yellow pigments are targeted with current laser methods, then removal is attempted, but these pigments are virtually impossible to remove with available lasers
Solution Approach 1:
The infrared-absorbing compounds serve as universal mediators that work with all pigment colors including green and yellow. Since the infrared radiation is absorbed by the intermediary compound rather than directly by the pigment, the effectiveness does not depend on the pigment's color-specific absorption characteristics. This universal mechanism allows the same infrared laser system to effectively remove tattoos of any color, overcoming the limitations of color-specific visible laser wavelengths.
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 solution enables safe, efficient, and permanent tattoo removal by converting colored compounds to a colorless state without dispersal, reducing health hazards and treatment complexity, applicable to a wide range of colors with minimal skin damage.
Implementation Method 1
the colored compound is capable of being rendered colorless by unimolecular cleavage of the fragmentation group upon exposure of the tissue marking to a source of infrared radiation
Implementation Method 2
heat generation from absorption of infrared radiation by the infrared-absorbing compound
Implementation Method 3
unimolecular cleavage of the fragmentation group upon exposure of the tissue marking to a source of infrared radiation
Implementation Method 4
the thermally labile substituent undergoes fragmentation to a sufficient extent to render the colored compound colorless
Data Source
AI summary
Provided are methods of applying a tissue marking to a tissue and rendering said tissue marking colorless when desired, comprising implanting into the tissue an amount of the tissue marking in sufficient quantity to form a detectable marking, said tissue marking comprising at least one colored compound comprising a thermally activatable fragmentation group and at least one infrared absorbing compound, wherein the at least one colored compound is capable of being rendered colorless by unimolecular fragmentation of the thermally activatable fragmentation group when the tissue marking is non-imagewise exposed by a source of infrared radiation and applying sufficient infrared radiation to a sufficient amount of the tissue marking to render the tissue marking colorless when desired.