Implanted CSF Flow Sensor for Shunt Malfunction Detection
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Solution Overview
Problem
Current methods for detecting shunt malfunction in hydrocephalus patients are invasive, costly, and prone to false alarms, lacking a non-invasive and accurate means to assess cerebrospinal fluid flow and shunt functionality.
Innovation Solution
A system comprising an implanted sensor with a flow sensing detection element, processor, and transceiver, paired with an external reader for wireless communication, power management, and user interface, enabling non-invasive monitoring of cerebrospinal fluid flow and shunt performance without the need for costly imaging tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CT or MRI scans are used to diagnose shunt malfunction, then diagnostic accuracy is improved, but cost and invasiveness increase
Solution Approach 1:
The patent replaces complex imaging systems (CT/MRI) with a simple flow sensor that directly measures CSF flow through the shunt. This substitution uses a straightforward flow detection mechanism instead of expensive and invasive imaging technology, maintaining diagnostic accuracy while reducing cost and complexity.
Solution Approach 2:
The flow sensor is implanted within the shunt itself, allowing the shunt to monitor its own functionality. This self-monitoring capability eliminates the need for external diagnostic procedures, providing continuous accurate feedback on shunt performance without requiring costly imaging tests.
2Ease of operation
If ShuntCheck III is used to detect shunt malfunction, then non-invasive monitoring is achieved, but measurement precision deteriorates due to low sensitivity and user-dependency
Solution Approach 1:
The patent replaces the external skin cooling method with an internal flow sensor that directly measures CSF flow. This substitution eliminates user-dependency and significantly improves sensitivity by placing the sensor within the shunt where it directly contacts the flowing fluid, providing accurate measurements without compromising non-invasive monitoring.
Solution Approach 2:
The flow sensor acts as an intermediary element implanted within the shunt, bridging the gap between the CSF flow and the monitoring system. This intermediary provides direct, accurate measurement of flow conditions while maintaining the non-invasive nature of the overall system through wireless communication.
3Ease of operation
If MEMS or ultrasound technology is used to detect CSF flow, then non-invasive detection is achieved, but measurement precision deteriorates due to limited capability to detect low flow
Solution Approach 1:
The patent replaces external MEMS or ultrasound detection methods with an internal flow sensor that directly measures CSF flow within the shunt. This substitution provides superior low-flow detection capability by placing the sensor in direct contact with the fluid, enabling accurate measurement of the low flow rates typical in CSF shunts while maintaining non-invasive monitoring.
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 provides accurate, non-invasive, and proactive monitoring of cerebrospinal fluid flow, reducing false alarms and enabling timely intervention by offering continuous or on-demand flow data and historical analysis through a user-friendly interface.
Implementation Method 1
the sensing element includes at least one temperature sensor
Implementation Method 2
the sensing element includes at least one pressure sensor
Data Source
AI summary
The present invention provides sensor systems and methods of using the same. The sensor systems include implantable sensors and readers configured to communicate with the implantable sensors. The implantable sensors are attachable to catheters and work with the readers to determine the presence of fluid flow and to calculate an absolute measure of fluid flow rate within a catheter. The sensor systems are capable of monitoring the flow of CSF fluid within shunt catheters, such as hydrocephalus shunt catheters.