Droplet Delivery Device with Accelerometer Mixing Verification
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Solution Overview
Problem
Current inhaler systems face challenges in delivering accurate, consistent, and verifiable doses of medication to the targeted lung passageways, with issues such as high droplet velocities leading to deposition in the mouth and throat, surface condensation, and inefficiency in delivering viscous drugs, which results in unwanted side effects and incorrect dosing.
Innovation Solution
A droplet delivery device equipped with an accelerometer and microcontroller unit that monitors and confirms proper shaking and orientation of the device, coupled with a feedback system for correct usage, and an ejector mechanism producing droplets with an average diameter of less than 5 microns, ensuring effective delivery to the pulmonary system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If current aerosol delivery systems are used to deliver medication, then the droplets are ejected with high velocity, but the droplets are deposited in the mouth and throat instead of reaching the distal lung
Solution Approach 1:
The patent changes the droplet ejection velocity parameter from high velocity (conventional systems) to low velocity (less than 10 m/s, preferably less than 5 m/s). This parameter change allows droplets to reach distal lung passageways without being deposited in the mouth and throat, thereby resolving the contradiction between ejection velocity and delivery accuracy.
2Quantity of substance
If larger total drug doses are required to achieve desired deposition in targeted areas, then the probability of unwanted side effects increases
Solution Approach 1:
The patent incorporates a feedback mechanism through the accelerometer that monitors device orientation and shaking. This feedback ensures proper patient usage and mixing of suspensions, leading to consistent and accurate dosing. By verifying correct usage, the system delivers the precise amount of drug needed without excessive dosing, thereby reducing the probability of unwanted side effects.
3Reliability
If repeated washing and cleaning are performed to prevent drug buildup on mesh aperture surfaces, then the risk of microbiological contamination is reduced, but the ejector mechanism may be damaged
Solution Approach 1:
The patent employs a disposable nebulizer cartridge that is discarded after a single use. This eliminates the need for repeated washing and cleaning of the ejector mechanism, preventing both microbiological contamination and damage to the ejector mechanism from cleaning agents. The disposable nature ensures hygiene while protecting the integrity of the ejector components.
4Adaptability or versatility
If viscous drugs and suspensions are delivered through aperture nebulizers, then the risk of clogging apertures increases
Solution Approach 1:
The patent requires the patient to shake the device before use, which preliminarily mixes the suspension to prevent settling and clogging. The accelerometer verifies that sufficient shaking has occurred. This preliminary mixing action ensures that viscous drugs and suspensions are properly homogenized before delivery, preventing aperture clogging while maintaining the ability to deliver various drug formulations.
5Stability of the object's composition
If the accelerometer verifies sufficient shaking to mix the volume of fluid, then the suspension is properly mixed, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical mixing verification systems with a simple accelerometer-based electronic detection system. The accelerometer monitors device orientation and shaking movements, and the microcontroller processes this data to verify sufficient mixing. This substitution achieves reliable suspension homogenization verification while keeping the device relatively simple through the use of compact electronic components.
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 device ensures accurate and consistent delivery of medication to the deep lung regions, reducing the risk of side effects and improving patient compliance by providing real-time feedback on correct usage and minimizing surface deposition and blockages.
Implementation Method 1
an accelerometer coupled to a power source and to the housing; a microcontroller unit coupled to the accelerometer and programmed to communicate a confirmation of sufficient movement of the droplet delivery device
Implementation Method 2
an ejector mechanism in fluid communication with the reservoir and the outlet; an ejector mechanism producing droplets with an average diameter of less than 5 microns
Data Source
AI summary
A droplet delivery device with an ejector mechanism and fluid reservoir includes an accelerometer to determine and communicate optimized mixing of fluid in the reservoir for inhalation of droplets, such as into the lungs, from the droplet delivery device.