Integrated Analyte Sensor and Infusion Device with Multi-Cannula Rotation
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Solution Overview
Problem
Diabetic patients using external infusion pumps face skin trauma, infection, and the need for frequent replacement of cannulas and biosensors due to their short useful life, which complicates insulin administration and analyte monitoring.
Innovation Solution
An integrated system with multiple cannulas and an extended-use analyte sensor configured for continuous monitoring and infusion, allowing for a seven-day continuous use with automated cannula retraction and replacement, minimizing skin irritation and reducing the frequency of site changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transcutaneous cannula placement is used for insulin delivery, then insulin infusion can be achieved, but skin trauma and infection risk occur at the infusion site
Solution Approach 1:
The system divides the infusion function into multiple cannulas (first and second cannulas) that can be independently positioned and activated. This segmentation allows rotation between sites, distributing the harmful effects of transcutaneous placement across multiple locations rather than concentrating damage at a single site.
Solution Approach 2:
The system dynamically switches between the first and second cannulas based on site condition and usage duration. The controller activates different cannulas at different times, creating a dynamic infusion system that adapts to skin condition changes and extends overall system reliability without continuous exposure at one location.
2Reliability
If short-life biosensors are used for analyte monitoring, then monitoring function is achieved, but frequent sensor replacement is required
Solution Approach 1:
The patent merges the analyte sensor with the extended-duration infusion system. The sensor remains in place continuously while the infusion cannulas are rotated, allowing the monitoring function to persist without interruption or replacement throughout the extended infusion period.
Solution Approach 2:
The system uses an extended-life sensor that exceeds the typical replacement schedule. By deploying a sensor designed for longer duration than conventional sensors, the system performs the monitoring function continuously without requiring intermediate replacement actions.
3Duration of action of moving object
If multiple cannulas are deployed for extended use, then infusion continuity is improved, but device complexity increases
Solution Approach 1:
The controller automatically manages the complexity of coordinating multiple cannulas and the sensor. The system self-regulates which cannula is active, tracks usage duration, and manages site rotation without requiring complex external control or user intervention, thereby handling the increased complexity internally.
Solution Approach 2:
The first and second cannulas are designed as interchangeable, multi-functional components that can both deliver insulin and serve as potential sensor sites. This universality reduces overall system complexity by using standardized components rather than specialized parts for each function.
Data Source
AI summary
Method and system for providing an integrated analyte monitoring system and on-body patch pump with multiple cannulas and a sensor combination is provided.