Swelling Polymer for Noninvasive Gastric Volume Reduction
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Solution Overview
Problem
Current weight loss methods, including pharmaceuticals and invasive procedures, are either ineffective or pose serious risks such as small bowel obstruction due to lack of differential degradation in gastric and intestinal environments.
Innovation Solution
Development of polymeric formulations that swell in the stomach and rapidly degrade in the intestine, allowing for controlled gastric volume reduction and safe, non-invasive weight management without the risk of small bowel obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If intragastric balloons are used to reduce gastric volume, then weight loss effectiveness is improved, but invasive procedures and serious side effects occur
Solution Approach 1:
The patent uses a biodegradable polymer formulation that is ingested and then naturally degraded by intestinal enzymes. The polymer is designed to be temporary in the stomach (providing volume reduction) but then disappears in the intestine without requiring removal procedures. This eliminates the need for invasive balloon placement and removal surgeries.
Solution Approach 2:
The patent replaces the mechanical intragastric balloon system with a chemical/biological system. Instead of using a physical balloon that requires surgical insertion and removal, the invention uses a polymer formulation that is degraded by intestinal enzymes. This substitution eliminates the mechanical invasive procedure while achieving the same weight loss effect through gastric volume reduction.
2Volume of stationary object
If compressed cellulose derivative is used to expand in stomach, then gastric volume reduction is achieved, but small bowel obstruction risk increases
Solution Approach 1:
The patent modifies the degradation parameters of the polymer formulation to achieve differential degradation rates. The polymer is designed to resist degradation in the acidic stomach environment (maintaining volume reduction effect) but degrades rapidly in the neutral/basic intestinal environment. This parameter change eliminates the obstruction risk by ensuring complete degradation before the polymer reaches the small bowel.
Solution Approach 2:
The patent applies different degradation characteristics to different parts of the gastrointestinal tract. The polymer formulation is designed with local quality differences: it maintains structural integrity in the stomach (for volume reduction) but is susceptible to enzymatic degradation in the intestine. This local differentiation of properties solves the contradiction between maintaining gastric volume reduction and preventing intestinal obstruction.
3Stability of the object's composition
If polymer maintains integrity in stomach, then gastric volume reduction is achieved, but polymer may cause obstruction in intestine
Solution Approach 1:
The patent introduces dynamic degradation characteristics to the polymer formulation. Instead of a static polymer that maintains constant integrity, the formulation is designed to be dynamically stable in the stomach (resisting degradation) but dynamically degradable in the intestine. This dynamic property allows the polymer to adapt its stability based on the environmental conditions of different gastrointestinal segments.
Solution Approach 2:
The patent uses intestinal enzymes as an intermediary to mediate the degradation of the polymer. The polymer is designed to be resistant to gastric enzymes but susceptible to intestinal enzymes. This intermediary mechanism allows the polymer to maintain integrity where needed (stomach) while being safely degraded where necessary (intestine), preventing obstruction without compromising gastric volume reduction.
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 polymeric formulations effectively reduce gastric volume, providing a safe and reversible method for weight management by maintaining integrity in the stomach and degrading quickly in the intestine, thus avoiding complications like small bowel obstruction.
Implementation Method 1
swelling upon absorbing water from gastric fluid to increase its size
Implementation Method 2
degradable by an intestinal enzyme or exposure to an intestinal pH
Data Source
AI summary
Provided are ingestible polymeric formulations and oral dosage forms for the reduction of gastric volume in the treatment of overweight and obese patients. The formulation includes an acid-sensitive, gelatin coating over a dehydrated hydrophilic polymer. When ingested, the acid-sensitive coating is quickly dissolved by gastric secretions and the hydrophilic polymer is exposed to the aqueous environment of the gastric milieu. The polymer absorbs water and expands to the point that will not allow the polymer to pass beyond the pyloric valve, and the expanded polymer is therefore trapped in the stomach.