Modular Dissolution Testing Apparatus with Independent Vessel Control
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Solution Overview
Problem
Conventional dissolution testing systems are inflexible and costly, as they are unitary integrated apparatuses that require replacement of the entire system when a single vessel fails, and do not allow for scalable or modular configurations, limiting their adaptability to varying testing needs.
Innovation Solution
A centrally controlled modular dissolution testing apparatus with detachable modules that can be easily added or removed, featuring a base unit with a controller that independently manages multiple modules, allowing for flexible configuration and reduced costs by enabling users to start with fewer vessels and expand as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a unitary integrated apparatus is used, then the system provides complete dissolution testing functionality, but the system cannot be scaled or modified and requires replacement of the entire system when a single vessel fails
Solution Approach 1:
The dissolution testing system is divided into separate modular vessels (first vessel, second vessel, third vessel) that can be independently attached to and detached from the base unit. Each vessel functions as an independent module with its own agitation and temperature control capabilities, allowing the system to be configured with 1-8 vessels according to testing needs. This segmentation enables individual vessel replacement without affecting other modules, resolving the contradiction between system reliability and scalability.
2Productivity
If a unitary integrated apparatus with multiple vessels is used, then sufficient data for statistical analysis can be obtained, but the system is costly and inflexible when testing needs change
Solution Approach 1:
The system configuration is made dynamic and adjustable rather than fixed. The base unit can accommodate 1-8 vessels depending on testing requirements, and the controller can be programmed with different test methods for various vessel configurations. This dynamic configurability allows the system to adapt productivity to actual needs without being constrained by a fixed complex structure, resolving the contradiction between data collection capacity and device complexity.
3Productivity
If six identical tests are run simultaneously in a conventional apparatus, then sufficient data for statistical analysis is provided, but all vessels must be at the same temperature and stirred at the same speed
Solution Approach 1:
Each vessel is equipped with independent temperature control and agitation control capabilities, allowing different test parameters to be applied to different vessels simultaneously. The controller can independently regulate temperature and stirring speed for each vessel while maintaining parallel testing capacity. This local quality control resolves the contradiction between productivity and test parameter variability by enabling customized testing conditions in each module.
4Device complexity
If a single motor powers multiple stirring apparatuses through belts or gear systems, then the system is mechanically integrated, but the system lacks modularity and requires full system replacement when a component fails
Solution Approach 1:
The mechanical system is segmented so that each vessel has its own motor and stirring apparatus rather than sharing a single motor through belts or gears. This segmentation provides mechanical integration within each module while enabling independent replacement of individual components. When a motor or stirring apparatus fails, only that specific vessel module needs to be replaced or repaired, not the entire system, resolving the contradiction between device complexity and ease of repair.
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 modular system reduces costs and simplifies maintenance by allowing users to add or replace individual modules, providing a scalable and adaptable solution for varying testing requirements while maintaining precise control over multiple test parameters.
Implementation Method 1
a paddle is used to stir the solution that results from the dissolution of the solute in the solvent
Implementation Method 2
The temperature of the solution in a vessel may be maintained by (1) placing the vessel in a temperature-controlled water bath or (2) using a heating jacket around the vessel
Data Source
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AI summary
In one embodiment, a modular dissolution-testing apparatus has a base unit adapted to hold and control operation of between one and eight dissolution-testing modules. The base unit has a programmable controller and a color touch screen for user interface with the controller and the modules. Each module includes a vessel for holding a solution of a dosage form dissolving in a solvent, an agitator apparatus for stirring the solution, and a motor to power - via a multi-motion assembly and a stirring shaft - stirring by, lifting of, and lowering of, the apparatus. Each module has a vessel heater and a temperature sensor, both communicatively connected to the controller for heating and regulating the temperature of the vessel contents. Each module is independently controllable by the controller, where control includes manually (by a user) or programmatically setting stirring speed, lifting and lowering apparatus, and starting and stopping stirring and heating.