Retention Drainage Catheter With Segmented Filter Membrane
Solution Overview
Problem
Foley retention drainage catheters are prone to obstruction due to debris accumulation, create suction forces that disrupt bladder mucosa, and retain residual fluid, leading to incomplete drainage and increased risk of urinary tract infections.
Innovation Solution
A multi-lumen filter membrane internal interstitial drainage channel catheter with a segmented retention element and perforated filter membrane, which creates expandable cavities and channels to prevent obstruction, distribute suction forces, and reduce residual fluid, allowing for parallel drainage and improved fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If drainage ports are made larger to improve drainage capacity, then fluid drainage efficiency is improved, but debris accumulation and obstruction risk increase
Solution Approach 1:
The drainage system is segmented into multiple drainage ports distributed along the catheter length, converting a single large-port system into multiple smaller ports. This segmentation maintains total drainage capacity while reducing debris accumulation in each individual port, as debris is less likely to block multiple smaller openings simultaneously.
Solution Approach 2:
A filter membrane is introduced as an intermediary component between the bladder and drainage ports. This membrane acts as a mediator that allows fluid passage while blocking debris, resolving the contradiction between maintaining open drainage ports and preventing debris accumulation.
2Productivity
If drainage ports are positioned to maximize drainage, then fluid removal is improved, but suction forces disrupt bladder mucosa integrity
Solution Approach 1:
The suction force is segmented and distributed across multiple drainage ports along the catheter rather than concentrated at a single location. This distribution reduces the suction force intensity at each port, minimizing mucosal disruption while maintaining overall drainage effectiveness through the combined action of multiple ports.
Solution Approach 2:
The drainage system transitions from a single-point suction to a distributed linear arrangement of multiple ports along the catheter length. This dimensional change from point to line distribution spreads the suction force over a larger area, reducing local tissue stress and preventing mucosal disruption.
3Ease of operation
If drainage ports are located proximally for easy access, then catheter insertion is simplified, but residual fluid remains in the bladder
Solution Approach 1:
The drainage function is segmented into multiple ports distributed along the catheter length, with ports positioned at both proximal and distal locations. This segmentation allows the catheter to drain fluid from multiple regions of the bladder simultaneously, ensuring complete drainage including residual fluid that would be inaccessible to a single proximal port.
Solution Approach 2:
The drainage system extends from a single proximal drainage point to a distributed arrangement of multiple ports along the catheter length. This dimensional extension allows fluid to be drawn from multiple locations including distal bladder regions, ensuring complete drainage while maintaining the proximal catheter insertion advantage.
Data Source
AI summary
A multi-lumen catheter, for insertion into and draining a body cavity, that mitigates the risk of obstruction of the drainage ports and drainage lumen of the catheter, reduces the detrimental effects caused by the suction forces of the drainage ports on the body cavity being drained, and reduces the risk of infection of the body cavity being drained by decreasing the residual volume of fluid retained in the body cavity being drained. These advantages are achieved by the novel approach of disposing a perforated filter membrane over a segmented retention element and also over the drainage ports of the drainage lumen of the catheter thereby creating internal interstitial drainage channels and internal interstitial drainage cavities.