Multi-Chamber Carpule Administration Device with Mixing and Venting Indicators
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Solution Overview
Problem
Existing administration devices for multi-chamber carpules, such as two-chamber carpules, lack clear indicators for the completion of the mixing and venting processes, making it difficult for users to ensure that the active substance is fully dissolved and the device is properly primed for administration, which can lead to incorrect dosing.
Innovation Solution
An administration device with a display system that indicates the position of the carpule relative to the housing after mixing and venting is complete, using visual and acoustic signals to ensure the user recognizes the completion of these processes, preventing misuse and ensuring reliable dosing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If multi-chamber carpules are used to store active ingredients in liquid form with extended shelf life, then storage stability is improved, but the complexity of the administration device increases due to the need for mixing mechanisms
Solution Approach 1:
The carpule is divided into multiple chambers (first chamber for active ingredient in dried/lyophilized form, second chamber for dissolving liquid) separated by movable stoppers. This segmentation allows the active ingredient to be stored in a stable dried form extended shelf life while enabling mixing through stopper displacement when needed
Solution Approach 2:
The active ingredient is prepared in advance in dried or lyophilized form in the first chamber, and the dissolving liquid is pre-filled in the second chamber. This preliminary preparation extends shelf life by avoiding degradation that would occur if the active ingredient were stored dissolved, while the mixing mechanism activates these pre-prepared components only when needed
2Reliability
If the mixing process is carried out slowly to avoid foaming and damage to the active substance, then product quality is improved, but the administration time increases
Solution Approach 1:
The stoppers are designed to be movable rather than fixed, allowing dynamic control of the mixing process. The stoppers can be displaced at controlled rates, enabling the mixing to be performed slowly enough to avoid foaming and damage to the active substance while still completing the process in reasonable time
Solution Approach 2:
The dissolving liquid acts as an intermediary that transfers from the second chamber to the first chamber through controlled displacement of stoppers. This intermediary mechanism allows the active ingredient to be gradually dissolved without excessive agitation that would cause foaming, while the liquid flow rate can be controlled to balance mixing quality and administration time
3Ease of operation
If the user must actively perform the priming process to vent the liquid line, then control over the administration device is improved, but the risk of user error increases
Solution Approach 1:
The device incorporates a display device that provides visual feedback to the user about the position of the carpule and the status of the mixing and venting processes. This feedback mechanism guides the user through the correct操作步骤, reducing the risk of user error while maintaining user control over the administration process
Solution Approach 2:
The device is designed to automatically perform the venting function through the display-guided process, reducing the need for complex manual operations by the user. The system essentially services itself by automatically venting the liquid line while providing feedback to confirm completion, thereby reducing user error risk
4Loss of information
If visual and acoustic display signals are added to indicate completion of mixing and venting, then user guidance is improved, but device complexity increases
Solution Approach 1:
The display device utilizes visual indicators such as color changes or different visual signals to indicate the completion of mixing and venting processes. This provides clear information to the user about process status without requiring complex electronic systems, maintaining simplicity while effectively communicating critical information
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
The invention relates to a device for administering an active substance from a multi-chamber carpule comprising at least one first chamber holding a solid active substance and a second chamber holding a dissolving liquid for the active substance. Said device also comprises a mixing device for mixing the active substance with the dissolving liquid and a housing accommodating the mixing device. The invention is characterized by at least one first indication (15; 21) for marking or indicating a position of the multi-chamber carpule (4) relative to the housing (1) upon completion of the mixing step and a second indication (16; 22) for marking or indicating a position of the carpule (4) relative to the housing (1) upon completion of a venting step of the carpule (4).