Semi-Permanent Tattoo Ink Marking for Scar-Free Radiation Alignment
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Solution Overview
Problem
Existing radiation therapy marking methods, such as traditional ink markers and permanent tattoos, are inadequate due to their temporary nature or undesirable permanent scarring, which can deter patients from receiving necessary treatment.
Innovation Solution
A sterile, single-use tattoo device comprising a hypodermic safety needle and an ampoule containing semi-permanent, disappearing tattoo ink that remains visible for several weeks to months before being naturally removed by the patient's immune system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If permanent tattoo ink is used for marking radiation therapy patients, then the markings last throughout the treatment course, but the patient suffers permanent scarring and religious objections
Solution Approach 1:
The patent changes the chemical composition parameters of the tattoo ink by incorporating biodegradable polymers (PLA, PGA, PLC) instead of traditional permanent pigments. This parameter change allows the ink to maintain visibility for the treatment duration (2-6 months) while automatically degrading and being absorbed by the body, thereby eliminating permanent scarring while preserving marking durability.
Solution Approach 2:
The patent applies the concept of disposable/short-living materials by using biodegradable ink that serves its purpose temporarily and then naturally disappears. The ink is designed to be effective for the specific treatment duration (2-6 months) and then automatically degrades through immune system clearance, similar to how disposable medical supplies are used once and discarded, but in this case the material is absorbed by the body rather than removed.
2Object-affected harmful factors
If traditional ink markers are used for marking radiation therapy patients, then no permanent scarring occurs, but the markings are temporary and last only 2-48 hours
Solution Approach 1:
The patent modifies the temporal parameter of ink persistence by using biodegradable polymers with controlled degradation rates. The ink formulation includes polymers like PLA, PGA, and PLC that degrade over specific timeframes (2 weeks to 6 months), allowing clinicians to select the appropriate degradation rate based on treatment duration. This parameter change extends marking duration from hours to months while maintaining the non-permanent, scar-free characteristic.
3Duration of action of stationary object
If repeated tattooing is performed to maintain visible markings, then marking duration is extended, but patient pain and treatment complexity increase
Solution Approach 1:
The patent applies preliminary action by formulating the ink with biodegradable polymers that are pre-configured to degrade at specific rates matching treatment durations. The ink is designed upfront to provide sustained visibility (2-6 months) without requiring reapplication, and the degradation timeline is predetermined based on the polymer composition. This eliminates the need for repeated tattooing procedures while maintaining continuous marking visibility throughout the treatment course.
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
Provides precise, long-lasting markings for radiation therapy without scarring, accommodating patients' religious beliefs and ensuring accurate treatment alignment, while fading after therapy completion.
Implementation Method 1
an ampoule containing semi-permanent, disappearing tattoo ink that remains visible for several weeks to months before being naturally removed by the patient's immune system
Data Source
AI summary
The disclosure relates to a medical device for applying a semi-permanent tattoo ink to mark patients for medical procedures, including but not limited to radiation therapy in the treatment of various types of cancer. The tattoo ink is removable or disappears over a period of time following intradermal application.