Investigate this: The critical design specifications would be discerned by performing a number of steps. Reviewing existing literature for methods of stimulation, safe physical stimulation limits$,$ and which pathways to target. There would need to be significant conversations with gastrointestinal specialists and neurologists that specialize in the enteric system to discern what methods would be appropriate for long$-$term usage. After taking those into consideration, building and testing of short$-$term prototypes to test for efficacy would be the first step followed by redesigns based on patient feedback and targeting a design for materials with longevity in mind. Once an adequate, safe, and effective device is developed, regulatory compliance would be sought after