Ascertaining the success of metabolic/bariatric surgery procedures and modifying their dynamics today lack noninvasive, accurate, and objective assessment technology. The feasibility of a method for measuring the cross-sectional area of and flow through the upper gastrointestinal system by electromagnetic induction is described. Our method depends on the change in resonance frequency of a series circuit (capacitor, inductor, and resistor) when changing the induction parameters. This is done by placing a coil constructed of multiple loops of wire around a substance of high magnetic permeability. A large coil and a 52-in-circumferencesimulation, 2-chambered, cylinder and a small coil and a test tube were used for these studies. Five feasibility experiments were performed using a standard protocol. Results demonstrated that using both the large coil and the small coil apparatus, the magnetic permeability compared with air of 3 paramagnetic substances Viron filings, Ferrite75, and Ferrite 78Vwere roughly equivalent, although the results showed greater differentiation with the small coil; lactated Ringer solution in the middle chamber of the large coil cylinder showed no change in various resonance frequencies; and sensitivity discrimination using the small coil between a 2-cm and a 1.5-cm tube filled with iron filings demonstrated reasonable sensitivity for the system, with comparable outcomes for the large coil.