Needleless Injector Dual-Energy Segmentation Combustion Residue
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Solution Overview
Problem
Existing needleless injectors face challenges in achieving repeatable and accurate delivery of substances to target regions due to residue generation from powder propellants used for energy, which can contaminate the injection substance and affect its quality.
Innovation Solution
A dual-energy injection system where one energy source uses combustion to apply primary ejection energy and another, non-combustion based energy source applies secondary ejection energy, minimizing residue exposure by using combustion products to break energy accumulation mechanisms, ensuring the substance reaches the target region effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a powder propellant is used to apply ejection pressure to the injection solution, then the injection solution can be ejected with sufficient force to penetrate the skin, but combustion residue is generated that may contaminate the injection solution and affect its quality
Solution Approach 1:
The patent segments the ejection process into two distinct stages with different energy sources: first, combustion of a propellant provides initial ejection force to penetrate the skin; second, decomposition of an azo compound provides continued ejection force without generating harmful residues that would contaminate the injection solution. This segmentation allows each stage to use the most appropriate energy source for its specific function.
Solution Approach 2:
The azo compound acts as an intermediary energy source between the combustion phase and the final delivery of the injection solution. It decomposes to provide gas pressure that continues the ejection process after combustion stops, serving as a bridge that transfers the injection solution from the ejection chamber to the target region without direct contact with combustion residues.
2Power
If combustion of explosive is used to apply primary ejection energy, then high pressure can be generated for effective ejection, but residue from combustion may affect the substance intended for injection
Solution Approach 1:
The ejection energy is segmented into primary energy from combustion and secondary energy from azo compound decomposition. The combustion provides the powerful initial impulse needed for effective ejection, while the azo compound decomposition provides a cleaner secondary energy source that maintains substance quality during the continuation of the ejection process.
Solution Approach 2:
The azo compound serves as an intermediary that protects the substance intended for injection from direct exposure to combustion residues. It decomposes in a controlled manner to provide continued pressure, acting as a buffer between the combustion process and the injection solution, thereby maintaining the reliability and quality of the medicinal substance.
3Device complexity
If a single combustion-based energy source is used, then the device structure can be simplified, but it is difficult to prevent contact between combustion products and the substance intended for injection
Solution Approach 1:
The energy source is segmented into two distinct components: a combustion-based propellant for initial ejection and an azo compound for secondary ejection. This segmentation, while increasing device complexity, successfully prevents harmful contact between combustion products and the injection solution by using the azo compound decomposition as a barrier and continuation mechanism.
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
This configuration ensures the substance is delivered accurately and safely to the target region without exposure to combustion residues, maintaining its quality and achieving consistent ejection pressures for effective delivery.
Implementation Method 1
an ignition portion that combusts ignition charge and discharges combustion products, thereby applying primary ejection energy to the substance intended for injection
Implementation Method 2
an energy accumulation portion that accumulates energy to be further applied to the substance intended for injection... wherein the energy accumulation portion is configured to release the energy accumulated in the energy accumulation portion by using the combustion product that is discharged
Data Source
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AI summary
An injector according to the present invention includes an encapsulating portion configured to encapsulate a substance intended for injection, a first application portion configured to combust ignition charge and discharge a combustion product thereby applying a primary ejection energy to the substance intended for injection that is encapsulated in the encapsulating portion, an energy accumulation portion configured to accumulate an energy to be further applied to the substance intended for injection, the energy being different from the primary ejection energy applied by the first application portion, and a second application portion configured to release the energy accumulated in the energy accumulation portion by using the discharged combustion product thereby applying, as a secondary ejection energy, the released energy to the substance intended for injection. With this configuration, the substance intended for injection can be caused to suitably reach the target region without affecting the substance intended for injection to be ejected.