Catheter Balloon Hyperinflation Prevention via Volume Feedback
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Solution Overview
Problem
Pulmonary artery catheters face the risk of pulmonary artery aneurysm or rupture due to hyperinflation of the inflatable balloon during procedures, leading to complex and costly treatments.
Innovation Solution
A system comprising an injection device, a sensing device, and a controller that adjusts the actuation pressure of a pressure relief valve to prevent hyperinflation by monitoring the injected volume of fluid in the inflatable balloon, using a threshold curve to dynamically adjust the pressure and prevent excessive inflation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the catheter balloon is inflated to monitor hemodynamic variables, then the monitoring capability is improved, but the risk of pulmonary artery aneurysm or rupture increases due to hyperinflation
Solution Approach 1:
The system continuously monitors the injected fluid volume through a sensing device and provides feedback to a controller. The controller adjusts the actuation pressure of the pressure relief valve based on this feedback, creating a closed-loop control system that prevents hyperinflation while maintaining effective monitoring capability.
Solution Approach 2:
The actuation pressure of the pressure relief valve is dynamically adjusted based on the injected fluid volume. As the balloon inflates and volume increases, the actuation pressure threshold changes to prevent excessive inflation, thereby reducing the risk of pulmonary artery damage while allowing effective hemodynamic monitoring.
2Reliability
If a fixed pressure relief valve is used to prevent hyperinflation, then the safety against overinflation is improved, but the ability to adapt to different injection volumes and patient conditions deteriorates
Solution Approach 1:
The pressure relief valve transitions from a fixed, static device to a dynamic, adjustable component. The controller modulates the actuation pressure of the valve based on real-time injected volume data, enabling the system to adapt to varying injection volumes and patient-specific conditions while maintaining safety against overinflation.
Solution Approach 2:
The sensing device continuously measures injected fluid volume and provides feedback to the controller, which adjusts the pressure relief valve actuation pressure accordingly. This feedback mechanism enables the system to adapt dynamically to different injection scenarios and patient conditions, resolving the contradiction between safety and adaptability.
Data Source
AI summary
A system includes an injection device that is configured to be fluidly coupled to the catheter and a sensing device that is configured to sense an injected volume of fluid in the inflatable balloon of the catheter. A controller is coupled by a wired or wireless communication link to the sensing device to receive an injected volume signal from the sensing device. The controller is configured to determine an actuation pressure based on the injected volume of the fluid in the inflatable balloon. A pressure relief valve is fluidly coupled to the catheter and coupled by a wired or wireless communication link to the controller. The controller is configured to adjust the actuation pressure of the pressure relief valve based on the injected volume of the fluid in the inflatable balloon.