Analyte Sensor With Capillary Flow Control
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Solution Overview
Problem
Conventional methods for monitoring blood glucose levels in diabetic patients are invasive, inconvenient, and often fail to detect hyperglycemic or hypoglycemic conditions in a timely manner, leading to dangerous side effects due to the infrequent measurement intervals.
Innovation Solution
An integrated sensor system that includes an analyte sensor, a vascular access device, and a flow control system to regulate exposure to biological samples and a reference solution, allowing for continuous monitoring of glucose levels with a flow control device configured to manage the exposure of the analyte sensor to a biological sample and a reference solution according to a flow profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single point blood glucose meter is used for measurement, then device complexity is reduced, but measurement precision and reliability deteriorate due to infrequent measurement intervals
Solution Approach 1:
The patent implements continuous glucose monitoring by maintaining a catheter in the bloodstream that continuously draws blood samples through capillary action and delivers them to the sensor. This continuous flow enables uninterrupted glucose level measurement, eliminating the gaps inherent in single-point measurements while maintaining manageable system complexity through passive capillary-driven flow.
2Reliability
If continuous monitoring is implemented, then reliability improves, but device complexity increases due to additional components
Solution Approach 1:
The system employs capillary action within the catheter to automatically draw blood samples without requiring external pumps or power sources. The catheter self-regulates blood flow based on pressure gradients, eliminating the need for complex active pumping mechanisms and reducing overall device complexity while enabling continuous monitoring.
Solution Approach 2:
The patent extracts only the essential components needed for continuous monitoring: a catheter with integrated sensor, utilizing the body's own blood flow and pressure gradients. By removing unnecessary active components and relying on passive physiological forces, the system achieves continuous monitoring with minimized complexity.
3Ease of operation
If measurement interval is extended, then ease of operation improves, but measurement precision deteriorates due to missed hyperglycemic or hypoglycemic events
Solution Approach 1:
The continuous monitoring system continuously measures glucose levels without interruption, capturing all hyperglycemic and hypoglycemic events regardless of how quickly they occur. This eliminates the risk of missing transient glucose excursions that would occur with extended measurement intervals, while the automated nature maintains ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system enables continuous, accurate monitoring of blood glucose levels, reducing the risk of undetected hyperglycemic or hypoglycemic events and allowing for more informed insulin therapy decisions.
Implementation Method 1
an analyte (or a species derived from it) that is electro-active generates a detectable signal at an electrode
Implementation Method 2
the valve is configured and arranged with a gravity flow position and a controlled flow position
Data Source
AI summary
Systems and methods of use for continuous analyte measurement of a host's vascular system are provided. In some embodiments, a continuous glucose measurement system includes a vascular access device, a sensor and sensor electronics, the system being configured for insertion into communication with a host's circulatory system.