Noninvasive Carotid Compression for Emboli Detection and Prevention
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Solution Overview
Problem
Current devices for detecting and preventing cerebral emboli during medical interventions are inadequate, as they either fail to reliably detect emboli or cannot prevent their propagation to the brain in a timely manner, and existing preventive measures often cause additional trauma or limitations in blood flow, leading to a high risk of complications.
Innovation Solution
A non-invasive device that uses controlled compression of the carotid and vertebral arteries, combined with vascular probes for real-time monitoring and feedback, to detect emboli and prevent their entry into the brain by creating a pressure gradient that diverts them away from cerebral circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transcranial Doppler ultrasound is used to detect cerebral emboli, then continuous detection and monitoring is achieved, but the device cannot prevent emboli propagation and requires complex positioning equipment
Solution Approach 1:
The patent extracts the detection and prevention functions into separate modular components. The detection system uses transcranial Doppler to identify emboli, while the prevention system uses independent carotid compression devices with inflatable balloons. This separation allows each component to be optimized independently, reducing overall system complexity while maintaining reliable detection and effective prevention capabilities.
Solution Approach 2:
The patent introduces an intermediary control system that processes Doppler signals and automatically triggers compression when emboli are detected. This automated feedback loop eliminates the need for complex manual coordination between detection and prevention systems, simplifying operation while ensuring timely intervention.
2Reliability
If intravascular filters are inserted to prevent emboli, then emboli capture is achieved, but additional trauma and procedural risks are introduced
Solution Approach 1:
The patent replaces the invasive mechanical filter system with a non-invasive external compression system. Instead of inserting physical barriers into the vasculature, the system uses inflatable balloons applied to the carotid arteries to mechanically obstruct emboli flow. This substitution eliminates all procedural risks associated with intravascular device insertion while maintaining effective emboli prevention.
Solution Approach 2:
The patent introduces the carotid artery compression as an intermediary mechanism between emboli source and brain. Rather than directly filtering emboli in the aorta or carotid artery lumen, the external compression creates a mechanical barrier at the carotid level, preventing emboli from reaching cerebral circulation without requiring intravascular device placement.
3Reliability
If carotid compression is applied to prevent emboli, then emboli influx is blocked, but blood flow to the brain may be limited
Solution Approach 1:
The patent implements periodic rather than continuous compression. The system compresses the carotid arteries only during detected embolic events, allowing normal blood flow between events. This periodic action maintains prevention effectiveness during critical moments while preserving adequate cerebral perfusion during intervals, avoiding the risks of sustained compression.
Solution Approach 2:
The patent uses real-time Doppler feedback to control compression timing and duration. When emboli are detected, the system automatically activates compression and maintains it until emboli passage is confirmed. The feedback mechanism ensures compression is applied only when necessary, preventing both emboli and unnecessary blood flow restriction during non-embolic periods.
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 device effectively detects cerebral emboli and prevents their entry into the brain, reducing the risk of stroke by using controlled compression mechanisms that are safer and more effective than existing methods, while maintaining adequate blood flow to the brain.
Implementation Method 1
creating a pressure gradient that diverts them away from cerebral circulation
Implementation Method 2
vascular probes for real-time monitoring and feedback, to detect emboli
Data Source
AI summary
A device for the prevention of stroke is provided that has a processor, a compression system, a compression member, and a vascular probe carried by the compression member. The vascular probe senses a parameter of a circulation system from a closed neck artery that is not being externally accessed. The processor processes the closed parameter and based upon this processing communicates with the compression system to instruct the compression system to actuate the compression member. The compression member and vascular probe are external to the interior of the patient when the vascular probe senses the closed parameter of the circulation system.