Esophageal Balloon Reflux Control via Pressure Gradient
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Solution Overview
Problem
Conventional enteral feeding systems fail to effectively prevent gastro-esophageal reflux during gastric-enteral feeding, leading to reflux fluid accumulation, which can result in complications such as aspiration pneumonia and bacterial infections, particularly in neonates, infants, and critically ill patients.
Innovation Solution
A pressure-regulated system involving an inflatable tampon-bladder with a double lumen enteral feeding tube, featuring a gastric bladder and an esophageal balloon connected by a conduit to a pressure-regulating unit, which maintains a pressure greater than gastric pressure to prevent reflux, and an automated pump that monitors and adjusts feeding rates based on relative gastro-esophageal pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional enteral feeding tubes are used, then the feeding system is simple, but gastro-esophageal reflux occurs and reflux fluid accumulates in the patient's passages
Solution Approach 1:
The patent implements a nested structure where an inner feeding tube is positioned within an outer feeding tube. The inner tube delivers nutrition to the stomach while the outer tube provides an additional pathway for reflux fluid drainage. This nested configuration allows the system to prevent reflux accumulation without requiring a completely separate device, thereby addressing the contradiction between reliability and complexity.
Solution Approach 2:
The feeding tube system is segmented into distinct functional components: an inner tube for primary feeding, an outer tube for reflux management, and separate lumens for different fluid pathways. This segmentation allows each component to perform its specific function efficiently, preventing reflux while maintaining overall system manageability despite increased structural complexity.
2Reliability
If feeding fluid pressure is increased to prevent reflux, then reflux prevention improves, but the system cannot receive back flow of reflux fluid
Solution Approach 1:
The patent introduces a drainage lumen within the outer feeding tube that acts as an intermediary pathway. This separate channel allows reflux fluid to bypass the high-pressure feeding pathway and drain directly from the patient's passages to the exterior. The intermediary drainage path enables the system to maintain high feeding pressure for reflux prevention while simultaneously providing an escape route for reflux fluid, thus resolving the contradiction between reliability and adaptability.
3Reliability
If a pressure-regulated system with tampon-bladder is implemented, then reflux prevention is effective, but the device complexity increases
Solution Approach 1:
The outer feeding tube is designed with multiple functions: it serves as a structural support for the inner tube, provides an additional feeding pathway, and contains the drainage lumen for reflux fluid removal. By making the outer tube multi-functional, the patent reduces the need for separate components, thereby mitigating the increase in device complexity while maintaining effective reflux control through pressure regulation.
4Device complexity
If reflux fluid accumulation is allowed to occur, then the system remains simple, but complications such as aspiration pneumonia and bacterial infections occur
Solution Approach 1:
The patent extracts the harmful reflux fluid from the patient's system by providing a dedicated drainage pathway through the outer tube's lumen. This extracted fluid is removed from the body entirely, preventing it from accumulating in the passages and eliminating the harmful effects of aspiration and infection. The extraction principle directly addresses the contradiction by adding minimal structural complexity to achieve significant health benefit.
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 system effectively reduces gastric reflux into the esophagus, preventing reflux fluid accumulation and minimizing the risk of complications like aspiration pneumonia by maintaining a controlled pressure gradient, thus ensuring safe and efficient enteral feeding.
Implementation Method 1
maintains a pressure within the esophageal bladder greater than gastric pressure to prevent gastric contents from refluxing into the patient's esophagus
Implementation Method 2
The gastric balloon or electronic monitor device at the end of the enteral feeding tube senses and measures the intragastric pressure
Data Source
AI summary
An enteral feeding unit or system that minimizes the occurrence of gastro-esophogeal-pharynegal reflux during feeding is described. The enteral feeding unit or device includes an automatable feeding pump with a feedback sensor for sensing a relative pressure in a patient's stomach and esophagus, and a regulator system for controlling or monitoring feeding rate to said patient as a function of said relative gastro-esophageal pressure. The system includes a stomach probe that has a fluid-tight closure of the esophagus. The stomach probe, according to the invention, is characterized by a tampon-bladder for watertight closure of the esophagus, in which the tampon-bladder forms from flexible and/or elastic material at least a closed inner cavity for the reception of a fluid medium, through a means (11) of establishing a prescribed pressure for the medium in the tampon-bladder (16) by an inner lumen forming the actual stomach probe, from which an outer hose-like lumen (18) extending to the tampon-bladder (16) is so arranged that between the outer lumen (18) and the inner lumen (17) a channel is formed connected to the inner cavity of the tampon-bladder (16) arranged on the outer lumen (18) by a number of openings (20), whereby the inner cavity of the tampon-bladder (16) is connected via the canal formed between the inner and outer lumina (17, 18) with the means of production of pressure in the tampon-bladder, that is, with a suitably graded reservoir or equalizing vessel (11) for the liquid medium situated above the tampon-bladder and outside the patient.