Implantable Shunt Flow Sensing for Non-Invasive Occlusion Checks
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Solution Overview
Problem
Current methods for interrogating shunt functionality, particularly in ventriculoperitoneal shunts, are invasive, costly, and prone to errors, often requiring general anesthesia or radioactive isotopes, and fail to provide a simple, patient-centered solution for assessing shunt occlusion or malfunction.
Innovation Solution
A battery-free, MRI-compatible, fully-implantable fluid flow detector device that wirelessly communicates with shunt tubing to detect cerebrospinal fluid flow, using microfluidic channels and NFC chips for real-time data transmission to external devices, allowing non-invasive monitoring of flow rates and pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional shunt interrogation methods using general anesthesia or radioactive isotopes are used, then shunt functionality can be assessed, but patient morbidity and healthcare costs increase significantly
Solution Approach 1:
The patent replaces invasive mechanical and radioactive interrogation methods with a magnetic field-based detection system. An external magnetometer detects changes in the magnetic field caused by fluid flow through the shunt, eliminating the need for general anesthesia, radioactive isotopes, and invasive procedures while maintaining reliable shunt functionality assessment
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the shunt and the detection system. The shunt contains magnetic particles that respond to fluid flow, creating detectable magnetic field variations that serve as a non-invasive indicator of shunt functionality, thereby avoiding direct patient exposure to harmful interrogation methods
2Measurement precision
If invasive shunt interrogation procedures are performed, then shunt occlusion can be detected, but patient comfort and safety deteriorate
Solution Approach 1:
The patent substitutes invasive mechanical procedures with a non-invasive magnetic field detection method. The external magnetometer measures magnetic field variations caused by fluid flow through the shunt, providing precise occlusion detection without requiring patient exposure to anesthesia or invasive catheter manipulation
Solution Approach 2:
The shunt system performs self-diagnosis by incorporating magnetic particles within the shunt tubing itself. The fluid flow through the shunt automatically generates detectable magnetic field variations, allowing the shunt to indicate its own functionality status without requiring external invasive intervention
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
Enables accurate, non-invasive, and cost-effective monitoring of shunt functionality, reducing patient morbidity and healthcare costs by providing real-time data on cerebrospinal fluid flow, thereby preventing potential shunt failures.
Implementation Method 1
a pressure sensor in fluid flow communication with the microfluidic channel and in electrical communication with the processor and the wireless communication module, the pressure sensor configured to generate pressure data
Implementation Method 2
configured with wireless communication functions associated with the cerebrospinal fluid flow detection
Data Source
AI summary
Embodiments of a system for improved interrogation of shunt functionality are disclosed. The system includes a fluid flow detector having a microfluidic chamber configured for receiving the passage of bodily fluid flow. The fluid flow detector generates measurements and other data and provides wireless access to the same.