Medication Delivery Device Dual-Count Reliability

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Solution Overview

Problem

Current medication delivery devices lack a reliable and cost-effective mechanism to accurately detect repeated physical interactions, such as dose settings and injections, which is crucial for ensuring proper medication administration.

Innovation Solution

A medication delivery device equipped with a housing, a rotatable dose button, a printed circuit board, a switch, and a controller that receives signals from the switch to generate counts using different techniques, determining the reliability of these counts to track interactions and communicate injection events wirelessly over an unencrypted channel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a simple, low-cost switch is used to detect repeated physical interactions, then device cost and complexity are reduced, but measurement precision and reliability of detecting interactions may deteriorate

Engineering Contradiction:
Improvedevice costVSAvoiddetection accuracy
Core Design Contradiction:
Ease of manufactureVSMeasurement precision

Solution Approach 1:

The controller implements feedback by comparing the first count from the simple switch with a second count from an alternative sensing mechanism. This feedback loop allows the system to verify detection accuracy and compensate for potential errors in the low-cost switch, thereby maintaining measurement precision while using inexpensive components.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent replaces or supplements the mechanical switch with alternative sensing techniques (such as optical, magnetic, or capacitive sensors) to verify the mechanical switch's readings. This substitution provides a non-contact or complementary method to cross-validate the simple switch's detection, ensuring accuracy without relying solely on the low-cost mechanical component.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If multiple counting techniques are implemented to verify reliability, then measurement precision and reliability are improved, but device complexity increases

Engineering Contradiction:
Improvedetection reliabilityVSAvoidcontroller complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The controller dynamically selects which counting technique to use based on real-time conditions. For example, it may switch between the simple switch and alternative sensing methods depending on detected signal quality, operational mode, or environmental factors. This dynamic approach ensures reliable detection while keeping the controller's operational logic manageable through context-dependent decision-making.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system implements partial verification by applying multiple counting techniques selectively rather than continuously. It may use the simple switch for routine operations and only engage alternative counting methods when anomalies are detected or during critical phases, thereby achieving sufficient reliability without the full complexity of continuous multi-technique verification.

Inventive Principle:
Principle #16Partial or excessive action

3Object-affected harmful factors

If encrypted data is transmitted over unencrypted wireless channels, then security is improved, but communication reliability may worsen due to potential interference on unencrypted channels

Engineering Contradiction:
Improvedata securityVSAvoidcommunication reliability
Core Design Contradiction:
Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent introduces an intermediary encryption layer that processes data before transmission. The encryption module acts as a mediator between the secure data source and the unencrypted wireless channel, transforming sensitive information into encrypted form that maintains security even when transmitted over unreliable or unencrypted communication paths. This intermediary function protects data integrity and confidentiality despite channel vulnerabilities.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS20230001098A1Medication delivery device with sensing system
Publication Date: 2023.01.05 ELI LILLY & CO
  • US20230001098A1 patent drawing
  • US20230001098A1 patent drawing
  • US20230001098A1 patent drawing

AI summary

Medication delivery devices are provided having a housing comprising a reservoir sized sufficiently to hold medication, a dose button being rotatable relative to the housing to select a dose size of the medication for an injection, a printed circuit board, a switch mounted to the printed circuit board, and a controller in communication with the switch. The controller is configured to generate a first count of a set of signals using a first counting technique, generate a second count of the set of signals using a second counting technique, and determine, based on the first and second count, reliability data of the first and/or second count. The controller can connect, using a wireless communication module, to a remote computing device to wirelessly communicate with the remote computing device over an unencrypted wireless communication channel, and transmit, using the wireless communication module, encrypted data to the remote computing device.