Non-Collapsible Catheter Tube With Dynamic Pressure Equalization
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Solution Overview
Problem
Existing indwelling fecal management catheters exert excessive pressure on the sphincter muscle, leading to potential damage and leakage of fecal matter around the catheter tube.
Innovation Solution
A non-collapsible catheter tube design with a compressible material that conforms to tissue and a pressure management system using check valves and vents to maintain optimal pressure equilibrium, reducing pressure on the sphincter and minimizing leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a collapsible catheter tube is used, then the catheter can accommodate patient movement and compress to reduce pressure, but it creates a leakage path for fecal matter around the outside of the catheter tube
Solution Approach 1:
The catheter tube employs a flexible yet non-collapsible design that can deform elastically to accommodate patient movement while maintaining its structural integrity to prevent collapse and leakage. The flexible material allows the tube to conform to tissue movement without compromising its ability to maintain a sealed passage.
2Reliability
If a fixed volume air pocket is used to provide an improved seal, then the seal to rectal tissues is enhanced, but the pressure increases during bowel movement, patient movement or patient sitting, possibly damaging the sphincter muscle
Solution Approach 1:
The air pocket system transitions from a fixed volume to a dynamic volume that can adjust in response to changing conditions. Check valves and vents are incorporated to allow the air pocket to expand or contract, maintaining optimal pressure equilibrium. This dynamic adjustment prevents excessive pressure buildup during bowel movements or patient movement while preserving the seal quality.
Solution Approach 2:
The pressure management system uses check valves and vents that respond to pressure changes within the air pocket. When pressure exceeds a certain threshold, the vent allows air to escape; when pressure drops, the check valve prevents excessive collapse. This feedback mechanism automatically maintains pressure within a safe range, preventing damage to the sphincter muscle while preserving seal integrity.
3Reliability
If a non-collapsible tube is used to prevent leakage, then drainage effectiveness is improved, but excessive pressure is exerted on the sphincter muscle
Solution Approach 1:
The catheter tube is designed to be non-collapsible under normal drainage conditions to maintain effective fecal matter conveyance. However, the tube incorporates compliant sections or materials that allow controlled deformation under excessive pressure, reducing the force exerted on the sphincter muscle while preserving drainage functionality.
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 solution effectively reduces pressure on the sphincter muscle while ensuring efficient fecal drainage with minimal leakage, enhancing patient comfort and hygiene.
Implementation Method 1
the catheter tube comprises a material that compresses to reduce excessive pressure on surrounding tissue and accommodate patient movement
Implementation Method 2
a pressure management system using check valves and vents to maintain optimal pressure equilibrium
Data Source
AI summary
An apparatus according to certain embodiments generally includes an elongated tubular member having a proximal end and an opposite distal end, and an inflatable balloon surrounding the distal end. The elongated tubular member comprises an outer tube, a non-collapsible inner tube positioned within the outer tube, and a compressible material positioned between the outer tube and the inner tube.