Compact Adherence-Tracking Device for Metered-Dose Inhaler

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Solution Overview

Problem

Existing adherence-monitoring devices for metered dose inhalers (MDIs) are often bulky, require customized inhalers, have inadequate provision for encouraging adherence, and lack real-time feedback and accurate recording of inhalation and exhalation techniques.

Innovation Solution

A compact adherence-monitoring and tracking device that integrates with conventional MDIs, featuring an electro-mechanical system with sensors and a microcontroller to capture and process real-time data on inhalation flow rates, technique, and adherence, providing immediate feedback and customizable alerts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If adherence-monitoring devices are integrated with conventional pMDI, then adherence tracking capability is improved, but device bulk and complexity increase

Engineering Contradiction:

Improveadherence tracking capabilityVSAvoiddevice bulk

Core Design Contradiction:

Extent of automationVSVolume of moving object

Solution Approach 1:

The electronic components (transducer, microcontroller, memory, display) are nested within a compact housing that integrates with the pMDI actuator. The transducer is positioned within the flow path of the actuator, and the entire electronic assembly is contained within a space-efficient structure that does not significantly increase the overall device volume.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The device performs multiple functions within a single integrated unit: it monitors adherence by detecting actuator operation, tracks inhalation technique via flow rate measurement, provides real-time feedback through display, and communicates usage data. This multi-functionality reduces the need for separate devices and minimizes overall bulk.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If customized inhaler components are used for monitoring, then measurement precision is improved, but ease of manufacture deteriorates

Engineering Contradiction:

Improveinhalation technique recording accuracyVSAvoidcustomized inhaler requirement

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The monitoring system is segmented into independent functional modules: a transducer module for flow rate detection, a microcontroller module for data processing, a memory module for storage, and a display module for feedback. This modular segmentation allows each component to be manufactured and tested separately, then assembled into the final device, improving ease of manufacture while maintaining measurement precision.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The transducer acts as an intermediary component that interfaces with the conventional pMDI flow path without requiring customization of the inhaler itself. It measures flow rate through the existing actuator mechanism and converts it into electrical signals for processing, enabling accurate inhalation technique recording while maintaining compatibility with standard pMDI devices.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If real-time feedback system is implemented, then adherence encouragement is improved, but energy consumption increases

Engineering Contradiction:

Improveadherence encouragementVSAvoidbattery consumption

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The display provides feedback in periodic intervals rather than continuous operation. The microcontroller processes sensor data and updates the display at optimized intervals, and the system enters low-power sleep modes between active periods. This periodic action pattern provides sufficient real-time feedback for adherence encouragement while significantly reducing overall energy consumption compared to continuous operation.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system implements feedback through the display unit that provides real-time visual information to the user about adherence status and inhalation technique. This feedback mechanism encourages proper usage behavior without requiring continuous high-energy operation, as the feedback is delivered in response to specific user actions and system events.

Inventive Principle:

Principle #23Feedback

4Loss of information

If multiple sensors are integrated for comprehensive monitoring, then measurement completeness is improved, but device complexity increases

Engineering Contradiction:

Improveinhalation data completenessVSAvoidelectronic system complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The flow rate transducer serves multiple measurement functions simultaneously: it detects inhalation flow rate for technique assessment, measures the timing and duration of inhalations for adherence tracking, and monitors the overall usage pattern. By combining these functions into a single sensor system, the device achieves comprehensive data collection while minimizing the number of separate components and reducing electronic system complexity.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12213798B2Adherence-tracking and monitoring device for metered-dose inhaler

Publication Date: 2025.02.04 CIPLA LTD

AI summary

An adherence-monitoring and tracking device captures usage of a metered dose inhaler (MDI). The device includes an enclosure for enclosing a metered dose inhaler (MDI), and an electro-mechanical system forming a part of enclosure to sense and log the operation of the MDI. The electro-mechanical system includes at-least one transducer to capture one or more parameters pertaining to an operation of the MDI by the user. A microcontroller processes the captured parameters, and an output-unit renders data pertaining to operation of the MDI.