Drug Delivery Device Assembly with State-Change Indicators
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drug delivery devices lack a clear and efficient method to distinguish between used and unused conditions, leading to potential misuse and increased risk of incorrect assessment, especially in emergency or self-administration scenarios.
Innovation Solution
A drug delivery device assembly featuring a housing unit with a cap that covers the dispensing end, including machine-readable information features that change visibility or readability based on the device's state, allowing for quick and accurate determination of whether the device has been used, using snap features and movable members like plungers or needle covers to indicate the dispensed condition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If intensive visual investigations of external appearance are used to determine device usage status, then assessment accuracy may be improved, but assessment time increases and investigator fatigue increases
Solution Approach 1:
The patent employs color-changing indicators that provide immediate visual distinction between used and unused devices. The indicator changes color based on the device state, eliminating the need for intensive visual investigation and enabling rapid accurate assessment.
Solution Approach 2:
The patent replaces manual visual inspection with machine-readable information features that can be quickly scanned and decoded by automated systems, reducing both time and human fatigue while maintaining or improving assessment accuracy.
2Measurement precision
If remote or tiny features are inspected to verify device usage status, then assessment accuracy may be improved, but assessment time increases and ease of operation deteriorates
Solution Approach 1:
The patent uses prominently displayed color-changing indicators that are easily visible and require no close inspection or remote feature examination, making assessment simple and intuitive while maintaining high accuracy.
Solution Approach 2:
The patent replaces manual inspection of tiny features with machine-readable codes that can be quickly scanned from a distance, improving both ease of operation and verification accuracy simultaneously.
3Device complexity
If no clear distinction features are provided, then device complexity is reduced, but reliability deteriorates due to potential misuse
Solution Approach 1:
The patent incorporates simple color-changing indicators that provide clear distinction between used and unused devices without adding significant structural complexity, thereby maintaining reliability while preventing misuse.
Solution Approach 2:
The patent uses machine-readable information features that can be easily integrated into the device structure without significant complexity increases, providing reliable distinction and preventing unauthorized reuse through automated verification.
Data Source
AI summary
An assembly for a drug delivery device, the assembly comprising: a housing unit, the housing unit comprising a housing for receiving a reservoir and a dispensing mechanism configured to dispense liquid drug content from the reservoir in a dispensing operation, a cap which is releasably connected to the housing unit, the cap, when connected to the housing unit, at least partially covers a distal dispensing end of the assembly, which is uncovered when the cap is disconnected from the housing unit, a first information feature having coded first content, wherein the first information feature is machine-readable to retrieve the first content from the first information feature, a second information feature, wherein the first information feature is visible and/or machine-readable when the cap is connected to the housing unit and removable together with the cap from the housing unit or rendered unreadable when the cap is disconnected from the housing unit.