Polymeric Acid Gas Generation for Controlled Drug Delivery
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Solution Overview
Problem
Existing drug delivery devices using chemical reaction systems face challenges in controlling the rate of gas generation, particularly for slow delivery of high-concentration proteins and high-viscosity pharmaceuticals, as existing systems often result in rapid and unpredictable therapeutic fluid administration.
Innovation Solution
A liquid base-polymeric acid chemical reaction system is introduced, which includes a housing with separate chambers for a liquid base, polymeric acid, and therapeutic fluid, allowing controlled gas generation to regulate the delivery rate by adjusting variables such as water content, acid concentration, surface area-to-volume ratio, and cross-linking of the polymeric acid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a liquid acid-powder base reaction system is used to generate propellant gas, then gas generation occurs rapidly, but the delivery rate of therapeutic fluid becomes uncontrollable and too fast
Solution Approach 1:
The patent changes the physical state parameters of the reactants from liquid acid-powder base to liquid base-liquid acid system, and further optimizes by using polymeric acid with controlled molecular weight, cross-linking degree, and viscosity. These parameter changes enable precise control over reaction rate and gas generation speed, achieving reliable control over therapeutic fluid delivery rate.
Solution Approach 2:
The patent employs composite material strategies by combining polymeric acid with specific molecular structures and cross-linking agents to create a reaction system with tailored properties. The composite nature of the polymeric acid system provides both controlled reaction kinetics and stable gas generation, resolving the contradiction between speed and reliability.
2Duration of action of moving object
If existing chemical reaction systems are used, then gas generation occurs, but the rate cannot be controlled for slow delivery of high-viscosity pharmaceuticals
Solution Approach 1:
The patent utilizes parameter changes in the polymeric acid system, specifically adjusting molecular weight, cross-linking density, and viscosity, to control the reaction kinetics. These parameter adjustments enable the system to deliver high-viscosity pharmaceuticals at controlled slow rates, providing both extended delivery duration and ease of operation through programmable delivery profiles.
Solution Approach 2:
The patent introduces dynamic control capabilities by making the delivery rate adjustable and programmable. The system can adapt the gas generation rate and therapeutic fluid delivery rate in real-time, enabling slow delivery when needed while maintaining ease of operation through user control and programmability.
3Productivity
If rapid gas generation is produced, then therapeutic fluid is delivered quickly, but control over delivery speed is lost
Solution Approach 1:
The patent applies parameter changes to the polymeric acid-liquid base reaction system, optimizing molecular weight, cross-linking, and viscosity parameters to achieve predictable gas generation rates. This enables reliable and predictable therapeutic fluid delivery speed while maintaining high productivity through efficient gas utilization.
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 system enables controlled and slower delivery of therapeutic fluids, ensuring a consistent and adjustable delivery rate, suitable for high-concentration proteins and high-viscosity formulations, by modulating the reaction rate and gas production within the drug delivery device.
Implementation Method 1
the liquid base reacts with the polymeric acid to generate a propellant gas that delivers the therapeutic fluid from the device
Data Source
AI summary
A chemical reaction system is disclosed for use in a device for delivering a therapeutic fluid comprising a liquid base and a polymeric acid. A reaction rate of the chemical reaction system is capable of being adjusted by adjusting at least one of surface area-to-volume ratio, acid concentration, and cross-linking of the polymeric acid.