Endoluminal Suction Tube and Porous Body for Secure Leak Closure
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Solution Overview
Problem
Existing minimally invasive treatments for gastrointestinal tract perforations and anastomotic leaks, such as endoscopic stent placement and surgical re-operation, are invasive, have high morbidity and mortality rates, and are prone to complications like stent migration and infection.
Innovation Solution
A medical device comprising a tube with a porous body and a wire mechanism that applies negative pressure to accelerate wound healing, featuring a non-zero angle attachment system to prevent separation during removal, and optional components like a helical body or inflatable balloon for secure detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If endoscopic stent placement is used to treat GI tract perforations or anastomotic leaks, then the invasiveness is reduced compared to surgical re-operation, but the stent can migrate from the intended location and wall off infection at the treatment site, inhibiting drainage
Solution Approach 1:
The device divides the treatment system into separate functional components: a porous body for drainage and healing, a tube for suction, and a wire for positioning and removal. This segmentation allows each component to perform its specific function optimally while working together as a coordinated system, avoiding the migration issues of single-piece stents.
Solution Approach 2:
The porous body is positioned and secured at the treatment site before the tube is fully deployed. The wire is pre-positioned to enable controlled placement and subsequent removal. This preliminary positioning ensures stability during the healing process while maintaining the ability to remove the device when no longer needed.
2Reliability
If a tube with porous body is used to apply negative pressure for wound healing, then healing efficacy is improved, but the tube may separate from the porous body during removal
Solution Approach 1:
The device combines different materials and structures - the porous body made of porous material for fluid absorption, the tube for negative pressure application, and the wire for mechanical coupling. This composite construction ensures both effective wound healing through negative pressure and secure connection that prevents separation during removal.
Solution Approach 2:
The wire is configured to exert force at a non-zero angle relative to the central longitudinal axis of the tube, creating a curved or angled force vector rather than a straight linear pull. This angular configuration distributes stress more effectively and prevents direct separation forces that would cause the tube to detach from the porous body.
3Reliability
If surgical re-operation is performed to treat perforations or anastomotic leaks, then definitive treatment is achieved, but the procedure has high morbidity and mortality rates
Solution Approach 1:
The device extracts the essential therapeutic functions of surgical treatment (drainage, negative pressure application, and wound healing promotion) and delivers them through a minimally invasive endoscopic approach. This extraction allows achieving surgical-level treatment effectiveness without the high morbidity and mortality associated with open surgical re-operation.
Solution Approach 2:
The device uses negative pressure (suction) applied through the tube to achieve wound healing and tissue approximation. This pneumatic mechanism provides effective treatment that would otherwise require surgical intervention, significantly reducing morbidity and mortality while maintaining treatment effectiveness.
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
Facilitates efficient wound closure by reducing separation of the tube from the porous body during removal, thereby minimizing complications and enhancing healing efficacy.
Implementation Method 1
The tube may be configured to couple to a source of suction
Data Source
AI summary
A medical device may include a tube defining a lumen. The tube may be configured to couple to a source of suction. The medical device may include a porous body coupled to a distal portion of the tube. The porous body may include a plurality of openings in fluid communication with the lumen. The medical device may further include a wire coupled to the distal portion of the tube. The wire may be configured to move the distal portion of the tube and the porous body via a pulling force applied to the wire. The pulling force applied to the wire may exert a force on the tube that is at a non-zero angle relative to a central longitudinal axis of the tube.