Balloon Valve Catheter Resolving Reflux Sealing
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Solution Overview
Problem
Existing gastrostomy feeding devices suffer from unreliable anti-reflux valves that fail to prevent reflux over time due to clogging and stretching, leading to skin burns and infections, and lack the ability to control both inflow and outflow of fluids effectively.
Innovation Solution
A catheter design featuring a selectively inflatable external balloon and internal balloon valve that restricts fluid flow through the main fluid flow channel, allowing only fluids introduced under pressure to pass, eliminating the need for external valves and reducing the risk of leakage and reflux.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If membrane valves are used to prevent reflux, then the valve can seal under the influence of material resiliency, but the membrane becomes stretched by repeated use causing loss of sealing ability and leakage
Solution Approach 1:
The patent removes the traditional membrane valve component from the system and replaces it with a balloon valve mechanism. This extraction eliminates the problem of membrane stretching while maintaining the reflux prevention function through a different mechanical principle based on balloon expansion and compression.
Solution Approach 2:
The patent changes the physical state and mechanical properties of the valve from a flexible membrane that relies on material resiliency to an inflatable balloon structure that uses controlled volume expansion. This parameter change from two-dimensional membrane to three-dimensional inflatable structure fundamentally resolves the stretching issue.
2Device complexity
If flapper valves are used to prevent reflux, then the valve structure is simple, but the valve clogs and malfunctions after repeated uses
Solution Approach 1:
The patent introduces pneumatic principles by using an inflatable balloon valve controlled through fluid pressure. The balloon can be inflated to close the valve and deflated to open it, providing reliable reflux prevention without the clogging issues of flapper valves while maintaining reasonable structural complexity.
3Reliability
If valves are positioned for decompression, then special decompression sets are required to activate them, but this reduces ease of operation
Solution Approach 1:
The patent enables the valve to be operated directly at the device site without requiring external decompression sets. The balloon valve can be inflated and deflated through the device's own fluid pathway, allowing the system to serve itself and eliminating the need for additional external equipment.
4Reliability
If external valves and closure caps are used to control fluid flow, then the device can prevent reflux, but this increases the risk of dripping, backflow, and spillage
Solution Approach 1:
The patent merges the valve function directly into the internal structure of the catheter device by integrating the balloon valve within the fluid pathway. This eliminates the need for separate external valves and closure caps, creating a unified system that reduces interfaces where leakage and spillage could occur while maintaining reliable reflux prevention.
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 catheter provides a reliable, long-term positive sealing effect, reducing the risk of reflux, leakage, and backflow, while allowing controlled inflow and outflow of fluids, enhancing safety and convenience.
Implementation Method 1
an internal balloon valve that when inflated restricts fluid flow through the main fluid flow channel to only those fluids introduced to the main inlet port under pressure
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A catheter having a selectively inflatable external balloon and an internal balloon, where the internal balloon is operable as a valve to control fluid flow through a channel.