Adaptive Inhaler Airflow Control for Consistent Drug Delivery
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Solution Overview
Problem
Existing inhalers lack reproducibility in delivering the active ingredient due to variations in user-specific inhalation techniques, affecting the vapor quality and drug delivery based on individual inhalation strength.
Innovation Solution
The inhaler measures airflow during inhalation, compares it to a stored breath profile, and adjusts the delivery mechanism (heating element, piezoelectric element, or gas compressor) to match the user's inhalation pattern, providing feedback and ensuring consistent drug delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a preset, user-independent delivery mechanism is used, then the device structure is simple, but the vapor quality and drug delivery consistency deteriorate due to variations in user inhalation techniques
Solution Approach 1:
The patent implements a feedback mechanism where a sensor detects the user's inhalation characteristics (flow rate, duration, depth) in real-time, and this information is used to dynamically adjust the delivery of active ingredient. The control unit modifies the vaporization parameters based on the detected inhalation profile, ensuring consistent drug delivery regardless of variations in user technique.
Solution Approach 2:
The delivery mechanism transitions from a static, preset system to a dynamic one that adapts to user-specific inhalation patterns. The system adjusts delivery parameters (such as heating power, nebulization rate) in real-time based on detected inhalation characteristics, making the delivery mechanism responsive and adaptable rather than fixed.
2Speed
If the delivery element is activated based on simple negative pressure detection, then the activation response is fast, but the dosage control precision deteriorates due to lack of correlation with user-specific air volume
Solution Approach 1:
The sensor system provides continuous feedback on the actual air volume and flow characteristics during inhalation. The control unit uses this feedback to adjust the delivery rate of active ingredient in real-time, ensuring that the dosage is precisely correlated with the user's actual inhalation volume rather than relying solely on simple pressure-triggered activation.
Solution Approach 2:
The system dynamically changes delivery parameters (such as heating temperature, nebulization pressure, or pump rate) based on the detected inhalation parameters. This allows the dosage to be precisely controlled as a function of the actual air volume inhaled, transforming the control from a simple binary on/off based on pressure to a continuous adjustment based on multiple inhalation parameters.
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 approach enhances reproducibility of the smoking experience and ensures precise dosage by adapting to individual inhalation patterns, preventing overdoses and ensuring consistent drug delivery.
Implementation Method 1
a sensor system with a flow measuring device for measuring the volume and/or mass flow of the air flowing through the air duct
Implementation Method 2
an ultrasonic nebulizer that vaporizes or atomizes liquid using a piezoelectric element
Implementation Method 3
an ultrasonic nebulizer that vaporizes or atomizes liquid using a piezoelectric element
Implementation Method 4
A delivery element can be a heating element, an ultrasonic nebulizer that vaporizes or atomizes liquid
Implementation Method 5
a gas compressor that builds up gas pressure and thereby atomizes or vaporizes liquid through a nozzle
Implementation Method 6
a nebulizing membrane in which liquid is vaporized or atomized by high-frequency vibration of the membrane
Data Source
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AI summary
The invention relates to an inhaler (10), comprising: - a housing (11); - an air channel (30), which extends in the housing (11), between at least one air inlet opening (32) and a suction opening (24); - a dosing element (21) for vaporizing or nebulizing liquid supplied by the dosing element (21), for addition to air flowing in the air channel; - an electronic control device (15); - an electronic data store (35); and - a sensor system (33) having a flow-measuring device (37) for measuring the volumetric and/or mass flow rate of the air flow flowing through the air channel (30). The electronic control device (15) is designed to capture a plurality of air flow measurement values over at least part of the duration of an inhalation draw by means of the flow-measuring device (37), to compare the plurality of air flow measurement values with a draw profile stored in the data store (35), and to output a control signal on the basis of the comparison of the plurality of air flow measurement values with the stored draw profile.