Optical Flow Measuring Apparatus for Inhalation Chamber
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Solution Overview
Problem
Current inhalation therapy devices, such as pressurized metered dose inhalers, face challenges in ensuring effective drug delivery to the lungs due to inadequate coordination between inhalation and actuation, leading to poor dosing and deposition of drug particles in the upper respiratory tract, especially in young children with erratic inspiratory cycles.
Innovation Solution
A flow measuring apparatus integrated into an inhalation apparatus, utilizing photo-detection devices with light sources and detectors to measure the presence, mass, and velocity of drug particles, providing real-time feedback to ensure efficient drug delivery by monitoring electromagnetic radiation disturbances and emitting notifications for proper inhalation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inhalation chamber is used to reduce particle velocity and improve drug deposition in the alveolar zone, then drug delivery effectiveness is improved, but the ability to monitor and verify efficient inhalation flow is lost
Solution Approach 1:
The patent implements a feedback mechanism by placing sensors (optical, capacitive, or thermal) in the inhalation chamber to detect particle flow characteristics. These sensors provide real-time information about whether the patient is inhaling efficiently, enabling verification of proper device usage and allowing the system to provide feedback to the user for improved inhalation technique.
Solution Approach 2:
The patent introduces sensor systems as intermediary elements within the inhalation chamber that mediate between the drug delivery function and the monitoring function. These sensors act as intermediaries that detect particle flow without interfering with the drug delivery process, enabling simultaneous achievement of both improved drug deposition and inhalation verification.
2Ease of operation
If pressurized metered dose inhalers are used for drug delivery, then portability and ease of use are improved, but coordination between inhalation and actuation becomes difficult leading to poor dosing
Solution Approach 1:
The patent employs feedback mechanisms through sensors that detect whether the patient has inhaled properly. This feedback allows the device to verify that the patient coordinated their inhalation with actuation, ensuring accurate dosing. The system can provide real-time feedback or post-event feedback to guide proper usage technique.
Solution Approach 2:
The patent replaces reliance on mechanical coordination (manual synchronization of inhalation and actuation) with sensor-based detection systems. Optical, capacitive, or thermal sensors detect the presence and characteristics of inhaled particles, substituting the need for precise mechanical timing with automated detection and verification.
3Measurement precision
If multiple sensors are placed in the inhalation chamber to monitor particle flow, then measurement precision of flow characteristics is improved, but device complexity increases
Solution Approach 1:
The patent implements multi-functional sensor systems that can perform multiple measurement tasks using the same sensor infrastructure. For example, optical sensors can simultaneously measure particle velocity, concentration, and flow rate. This universal approach allows precise flow characterization without proportionally increasing device complexity, as single sensor elements serve multiple diagnostic functions.
Solution Approach 2:
The patent utilizes different sensor types (optical, capacitive, thermal) that detect different physical parameters of the particle flow. By changing the measurement parameter rather than adding multiple identical sensors, the system achieves comprehensive flow characterization with minimal complexity increase. Each sensor type provides unique information about the inhalation process.
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 enhances the targeted delivery of drugs to the alveolar zone by optimizing inspiratory flow rates, reducing drug loss in the upper respiratory tract and ensuring adequate treatment by providing visual and audible feedback for proper inhalation techniques.
Implementation Method 1
the detector may be configured to measure disturbance of the electromagnetic radiation by said flow of particles from the inhalation chamber
Data Source
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AI summary
The present document describes a flow measuring apparatus for measuring a flow of particles through a section of a fluid dispensing apparatus, comprising at least one photo-detection device comprising a light source and a detector, wherein the light source is configured to emit electromagnetic radiation onto the detector along a light path, wherein the detector is configured to measure disturbance of the electromagnetic radiation by the flow of particles to provide measurements of the presence, mass and velocity of particles within said section of a fluid dispensing apparatus. Also described is an inhalation apparatus for drug delivery by inhalation comprising a flow measuring apparatus of the present invention.