Glucose Sensor-Transmitter Bayonet Coupling for Stable Wear
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Solution Overview
Problem
Current durable insertion devices for glucose sensors are complex, prone to wear and damage, require multiple steps, and often necessitate carrying both the sensor and insertion device, with issues related to on-body device stability, robustness of connections, and user comfort.
Innovation Solution
A medical sensor device with a sensor assembly and transmitter assembly that uses a bayonet-style mechanical interface allowing axial movement and rotation for secure attachment, featuring snap arms for tactile feedback and a self-tightening mechanism to ensure proper alignment and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bayonet-style mechanical interface is used for sensor-transmitter connection, then connection robustness and device stability are improved, but device complexity increases
Solution Approach 1:
The device is divided into separate sensor assembly and transmitter assembly components that connect through a bayonet-style mechanical interface. This segmentation allows each component to be optimized independently while providing a robust, reliable connection mechanism that resolves the contradiction between connection robustness and device complexity.
2Ease of operation
If the sensor and transmitter are integrated into a single unit, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The sensor assembly and transmitter assembly are merged into a single integrated unit that functions as one cohesive device. This merging improves ease of operation by eliminating the need to handle separate components, while the modular design allows the integration complexity to be managed through standardized connection interfaces.
3Stability of the object's composition
If a durable, reusable insertion device is used, then device stability is improved, but ease of manufacture and hygiene requirements worsen
Solution Approach 1:
The sensor assembly is designed as a disposable, single-use component that is discarded after insertion, eliminating the need for durable reusable insertion devices. This approach simplifies manufacturing by allowing the sensor to be manufactured with simpler, less expensive materials and structures, while the transmitter remains reusable and durable.
Data Source
AI summary
A medical sensor device includes a sensor assembly including an underside surface for attachment against a patient's skin, a sensor portion to detect a characteristic of the patient, and sensor assembly contacts which in operation carry signals representing the detected characteristic. The device also includes a transmitter assembly removably engageable with the sensor assembly and including circuitry to take the signals from the sensor assembly contacts and to transmit readings of the detected characteristic to external equipment. The device also includes mechanical interface components on the sensor assembly and the transmitter assembly which allow the transmitter assembly to be brought into abutment with the sensor assembly at a first angular position via relative axial movement between them, and then allow a relative rotation of the assemblies with respect to one another towards a second angular position and presents axial separation of the assemblies in the second angular position.