Intestinal Recirculation Valve for Short Bowel Syndrome
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Solution Overview
Problem
Patients with short bowel syndrome (SBS) face challenges in absorbing sufficient nutrients due to the shortened length of their small intestine, leading to the need for total parenteral nutrition (TPN) with associated long-term complications.
Innovation Solution
A system and process for recirculating distal intestinal content into the proximal small bowels, creating a fully internal recirculation loop within the intestine to enhance nutrient absorption, without the use of external pumps, bags, or artificial passages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If total parenteral nutrition (TPN) is used to maintain nutritional needs in SBS patients, then survival is achieved, but long-term complications including liver disease and gut atrophy occur
Solution Approach 1:
The intestinal tract is segmented to create a recirculation loop where distal intestinal content is diverted back to the proximal small bowel. This segmentation allows the same intestinal content to pass through the absorption surface multiple times, effectively increasing the functional length of the small intestine in SBS patients while avoiding TPN-related liver damage and gut atrophy
Solution Approach 2:
The recirculation system enables continuous passage of intestinal content through the small bowel multiple times, maintaining continuous nutrient absorption opportunity. This continuous action replaces the need for TPN by keeping the gut mucosa stimulated and functional, preventing atrophy while ensuring adequate nutrition
2Quantity of substance
If the small intestine is shortened due to disease or surgery, then the natural absorption capacity is reduced, but TPN provides nutrition with significant morbidity
Solution Approach 1:
The recirculation loop adds a temporal dimension to the spatial limitation. Instead of relying solely on the physical length of the small intestine, the system makes the content circulate multiple times through the available length, effectively multiplying the absorption opportunity without requiring additional physical space or complex external medical management
3Quantity of substance
If distal intestinal content is recirculated back to the proximal small bowel, then nutrient absorption capacity is increased, but a controllable valve system is required to regulate flow
Solution Approach 1:
The valve system is designed to be self-regulating, using the natural pressure gradients and flow dynamics of the intestinal content to automatically control recirculation. The system leverages the body's own physiological mechanisms rather than requiring complex external control devices, reducing overall system complexity while maintaining effective nutrient absorption
Data Source
AI summary
A recirculation system for recirculating intestinal content within an intestinal tract of a subject including a recirculation pathway extending from a distal portion of the intestinal tract to a proximal portion of the intestinal tract forming a recirculation loop for recirculating the intestinal content through the proximal portion of the intestinal tract to increase nutrient absorption from the intestinal content. An externally controllable valve is disposed in the recirculation pathway for controlling flow of intestinal content through the recirculation pathway.