Kink Detection in Cannula via Pressure-Induced Diaphragm Deformation
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Solution Overview
Problem
Current closed-loop insulin administration systems for diabetes management lack effective detection mechanisms for obstructions in cannulas or catheters, which can lead to inconsistent medication delivery and potential complications.
Innovation Solution
A kink detection system integrated into the disease management device, utilizing a diaphragm and sensors (capacitive or conductive) to measure pressure changes and alert the user if the pressure exceeds a threshold, ensuring uninterrupted fluid flow and safe medication delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a kink detection system with diaphragm and sensors is integrated into the disease management device, then the reliability of medication delivery is improved, but the device complexity increases
Solution Approach 1:
The kink detection system is nested within the existing disease management device structure. The diaphragm is positioned within the fluid flow path, and the sensor is integrated into the device housing, allowing the detection functionality to be contained within the existing device boundaries without requiring a completely separate system.
Solution Approach 2:
The diaphragm serves multiple functions: it acts as a pressure-sensitive element for kink detection, a flow restrictor to maintain pressure differential, and a structural component of the fluid delivery system. This multi-functionality reduces the need for additional separate components.
2Measurement precision
If pressure sensing components are added to detect obstructions, then the detection precision is improved, but the device complexity increases
Solution Approach 1:
The diaphragm acts as an intermediary element that converts pressure changes caused by kinks into measurable displacement or force. This intermediary mechanism amplifies the pressure signal, allowing simple sensors to detect subtle obstructions with high precision without requiring complex pressure sensing electronics.
Solution Approach 2:
The patent replaces complex electronic pressure sensing systems with a mechanical diaphragm-based detection system. The diaphragm's physical displacement in response to pressure changes can be detected by simple capacitive or conductive sensors, eliminating the need for complex piezoelectric or strain gauge-based pressure transducers.
3Productivity
If the cannula is implanted in the patient for continuous medication delivery, then the productivity is improved, but the risk of kinks and obstructions increases
Solution Approach 1:
The kink detection system provides real-time feedback about the cannula's condition to the patient and/or healthcare provider. When a kink or obstruction is detected through pressure changes, the system generates an alert that allows for immediate intervention, preventing medication delivery failure and enabling timely cannula replacement.
Solution Approach 2:
The detection system identifies kinks and obstructions before they completely block medication delivery. By detecting pressure changes at early stages, the system allows for preventive action to be taken, ensuring continuous therapeutic effectiveness and preventing complete treatment interruption.
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
The system effectively detects kinks or obstructions in the cannula, preventing medication delivery disruptions and enhancing the reliability of insulin administration, thereby improving patient safety and device performance.
Implementation Method 1
a diaphragm coupled to the fluid receiving portion, the diaphragm configured to deform in correspondence with a change in pressure in the fluid received
Implementation Method 2
the sensor can comprise a capacitive sensor... an electrical capacitance of the touchpad is configured to correspond to movement of the diaphragm
Implementation Method 3
the sensor comprises a conductive sensor... the conductive strip is configured to stretch as the pressure in the fluid is increased
Data Source
AI summary
Systems and methods relate to a kink or obstruction detection system for use in a minimally invasive implant, such as a disease management device. The kink or obstruction detection system can detect changes in pressure in the fluid flow path of a fluid being delivered to a patient. The kink or obstruction detection system can be included in a device between a pump and the cannula.