CGM Sensor Assembly Sealing for Blood and Liquid Leakage
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Solution Overview
Problem
Conventional continuous glucose monitoring (CGM) systems face issues with liquid leakage and potential damage to internal components due to improper assembly and blood exposure during insertion, leading to wound infection and device malfunction.
Innovation Solution
A physiological signal monitoring device with a base, biosensor, transmitter, and sealing unit, featuring multiple sealing members to prevent liquid leakage through defined pathways, and a design that allows secure assembly to minimize exposure to contaminants and blood.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the biosensor and transmitter are individually packaged and assembled by the user, then the device is easier to manufacture and transport, but the sensing device is more easily exposed to leakage if the user has not securely coupled the sensing device together
Solution Approach 1:
The device is divided into separate components (biosensor and transmitter) that are individually packaged and assembled by the user. The biosensor includes a mounting seat that can be separately assembled to the base, and the transmitter is separately packaged. This segmentation enables easier manufacturing and transportation while maintaining reliability through designed coupling mechanisms and sealing structures.
Solution Approach 2:
A sealing member is introduced as an intermediary element between the biosensor mounting seat and the transmitter. This sealing member prevents liquid leakage pathways that could form during user assembly, thereby maintaining reliability while allowing the device to remain segmented for ease of manufacture and assembly.
2Loss of time
If the transmitter is coupled to the biosensor right after the insertion process, then the device can be used immediately, but the blood flowing out of the wound may damage the internal components of the device
Solution Approach 1:
The base is designed with an integrated mounting seat that is pre-assembled before insertion. The sealing member is pre-positioned in the base structure, creating a sealed environment before the insertion process begins. This preliminary action ensures that when the transmitter is coupled immediately after insertion, blood cannot contaminate the internal components through pre-established sealing pathways.
Solution Approach 2:
The sealing member acts as an intermediary barrier between the external environment (where blood may flow) and the internal components of the device. It is positioned to seal the interface between the mounting seat and the transmitter, preventing blood from reaching sensitive electronic components while allowing immediate coupling of the transmitter after insertion.
3Reliability
If multiple sealing members are added to prevent liquid leakage, then the reliability of the device is improved, but the device complexity increases
Solution Approach 1:
The sealing member is designed to serve multiple functions simultaneously: it seals the interface between the mounting seat and transmitter to prevent liquid leakage, provides structural support for securing the transmitter to the base, and creates a barrier against blood contamination. This multi-functionality improves reliability without proportionally increasing device complexity.
Solution Approach 2:
The sealing member is integrated into the base structure rather than being a separate, additional component. The sealing function is merged with the mounting and structural functions of the base, thereby improving leakage prevention while minimizing the increase in overall device complexity.
Data Source
AI summary
A physiological signal monitoring device includes a base, a biosensor mounted to the base, a transmitter, and a sealing unit. The base is adapted to be mounted to a skin surface of a host. The biosensor includes a mounting seat and a sensing member that is mounted to the mounting seat. The sensing member is adapted to be partially inserted underneath the skin surface of the host for measuring an analyte of the host and to send a corresponding physiological signal. The transmitter is for receiving and transmitting the physiological signal, and has a bottom portion. The transmitter covers the base while the bottom portion faces the base. The sensing member is coupled to the transmitter. The sealing unit is used to seal paths through which a liquid possibly penetrates into an interior of the physiological signal monitoring device so as to avoid damage of the device.