Intravascular Balloon Reperfusion Therapy with Feedback Control
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Solution Overview
Problem
After percutaneous coronary intervention (PCI), reperfusion therapy often faces challenges in ensuring optimal blood flow restoration to ischemic tissues, as increased blood flow can trigger inflammatory responses and oxidative damage, known as reperfusion injury, which may hinder the restoration of normal tissue function.
Innovation Solution
An intravascular reperfusion therapy device with a balloon and sensor system is positioned within a coronary vein to deliver reperfusion therapy, monitoring blood flow and pressure data to assess therapy progression, and adjusting the balloon's inflation to control back pressure and therapy delivery, using a feedback loop to adaptively manage the treatment and prevent injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blood flow is increased to restore tissue health after PCI, then tissue oxygenation is improved, but reperfusion injury occurs due to inflammatory response and oxidative damage
Solution Approach 1:
The balloon is inflated and deflated in periodic cycles to create oscillating back pressure in the coronary vein. This periodic action enhances microvascular perfusion and promotes tissue reperfusion while controlling the intensity and duration of blood flow increases, thereby reducing oxidative damage and inflammatory response associated with continuous high-flow reperfusion
Solution Approach 2:
The system dynamically adjusts the back pressure parameter by modifying balloon inflation pressure and duration based on real-time physiological feedback. By changing pressure parameters in a controlled manner, the system optimizes tissue perfusion while minimizing reperfusion injury through precise parameter modulation
2Ease of operation
If a balloon is used to generate back pressure for reperfusion therapy, then blood flow control is improved, but device complexity increases due to integration of sensor and control systems
Solution Approach 1:
The system merges the balloon inflation mechanism with physiological sensors (flow sensor, pressure sensor) and a control processor into an integrated device. This combination allows automatic feedback control where sensor data directly adjusts balloon inflation, simplifying the operational complexity despite the enhanced functionality
Solution Approach 2:
The device performs self-regulation through automatic feedback control. The processor receives physiological data from sensors and autonomously adjusts balloon inflation parameters without requiring continuous manual intervention, making the complex device easier to operate through self-managing control
3Measurement precision
If real-time monitoring is implemented to assess therapy progression, then treatment precision is improved, but loss of time occurs due to data processing requirements
Solution Approach 1:
The system implements real-time feedback by continuously monitoring physiological parameters (blood flow, pressure) and immediately using this data to assess therapy progression. The processor analyzes sensor data in real-time to determine treatment effectiveness and dynamically adjusts balloon inflation, eliminating delays between measurement and action
Solution Approach 2:
The monitoring and control operations continue uninterrupted throughout the reperfusion therapy. Sensors continuously measure physiological parameters, and the processor continuously processes this data to maintain optimal treatment, ensuring no loss of time in assessing therapy progression
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 approach effectively monitors and controls reperfusion therapy, minimizing reperfusion injury and ensuring improved and sustained blood flow to ischemic tissues, thereby enhancing tissue health and function.
Implementation Method 1
The balloon may generate a back pressure within a coronary vein to deliver reperfusion therapy to a myocardium
Implementation Method 2
The intravascular reperfusion therapy device may include a sensor (e.g., a sensing component), which may sense physiological data (e.g., flow data, pressure data, and/or the like) representative of blood flow through the blood vessel
Implementation Method 3
the processing system may control inflation of the balloon such that obstruction of the blood vessel, the generated back pressure, and delivery of the reperfusion therapy is controlled
Data Source
AI summary
A system includes an intravascular reperfusion therapy device configured to be positioned within a coronary vein to deliver reperfusion therapy to a myocardium of a heart associated with the coronary vein. The intravascular reperfusion therapy device includes a flexible elongate member, a sensor, and a balloon. The balloon is configured to generate back pressure within the coronary vein to deliver the reperfusion therapy. The system includes a processor circuit in communication with the intravascular reperfusion therapy device. The processor circuit is configured to receive, from the sensor, physiological data associated with blood flow through the coronary vein, determine, based on the physiological data, a progression of the reperfusion therapy delivered to the myocardium, and control, based on the progression of the reperfusion therapy, inflation of the balloon while the intravascular reperfusion therapy device is positioned within the coronary vein such that the back pressure within the coronary vein is controlled.