Automated Inhaler Testing Carousel with Actuation Control
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Solution Overview
Problem
Current inhaler testing methods are inefficient and lack automation, leading to inconsistent drug delivery and manual errors in measuring aerodynamic particle size, which can result in either deposition on the throat or exhalation of medicament without therapeutic effect.
Innovation Solution
An automated inhaler testing apparatus with a rotatable carousel, actuating mechanisms, and a control unit to shake and actuate the inhaler, ensuring controlled delivery of medicament into multiple tubes for analysis, along with an inhaler shaking apparatus for formulation optimization and a washing device for automated tube cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual testing methods are used, then device complexity is reduced, but productivity and measurement precision deteriorate
Solution Approach 1:
The testing apparatus is divided into distinct functional modules: a rotatable carousel holding multiple tubes, an inhaler retaining apparatus, actuating mechanisms for shaking and actuation, and a control unit. Each module performs a specific function, allowing the system to handle multiple inhaler doses simultaneously through automated sequential testing, thereby improving productivity without overwhelming complexity
Solution Approach 2:
The inhaler retaining apparatus serves multiple functions: it secures the inhaler in position, receives shaking actuation to mix the formulation, receives actuation to dispense medicament, and positions the inhaler for sequential delivery to multiple tubes on the carousel. This multi-functionality improves testing efficiency by eliminating the need for separate devices for each operation
2Measurement precision
If automated testing is implemented, then productivity and measurement precision improve, but device complexity increases
Solution Approach 1:
The control unit coordinates the carousel rotation, inhaler actuation timing, and tube positioning based on predetermined test parameters. This automated feedback control ensures consistent aerodynamic particle size measurements by precisely controlling the delivery and sampling process, reducing manual errors while maintaining manageable system complexity through centralized control
Solution Approach 2:
The apparatus is designed to automatically perform the complete testing sequence without continuous manual intervention. The control unit manages the automated workflow where the carousel rotates to position tubes, the inhaler is shaken and actuated in sequence, and medicament is automatically delivered to each tube for analysis, improving measurement precision through consistent automated operation
3Productivity
If multiple tubes are used for testing, then productivity improves through parallel testing, but loss of substance increases due to sampling distribution
Solution Approach 1:
The carousel is pre-loaded with multiple tubes before testing begins. The control unit predetermines which tubes will receive which doses based on the testing protocol. This preliminary preparation allows parallel testing of multiple inhaler doses without requiring additional medicament handling or redistribution, improving productivity while minimizing substance loss through efficient predetermined allocation
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 apparatus ensures consistent and efficient testing of inhalers, optimizing drug delivery by automating the shaking and testing process, reducing manual errors and improving the analysis of medicament distribution, while the washing device streamlines the cleaning of tubes for further analysis.
Implementation Method 1
an inhaler shaking apparatus that shakes the inhaler prior to the test
Implementation Method 2
measuring or characterizing the aerodynamic particle size of atomized medicament, which is released upon actuation of a valve assembly
Data Source
AI summary
Inhaler testing apparatus includes a frame, a rotatable carousel rotatably mounted on said frame and that support tubes each having a closed end and an open end, an inhaler retaining apparatus on said frame that retains an inhaler being tested, and actuating mechanisms on the frame for moving the inhaler retaining apparatus in two directions, for shaking and actuating the inhaler being tested. A control unit controls rotation of the carousel and the actuating mechanisms to move the carousal relative to the inhaler being tested to cause controlled shaking of the inhaler and delivery of material from the inhaler into each tube. Analysis of the material in the tubes constitutes a test of the inhaler.