Feasibility Study to Assess a Trans-nasal Intestinal Potential Difference Probe

A total of 10 healthy adult volunteers will be enrolled in this study. All consented participants will be receive the same intervention. A Nasal tube will be inserted through nares until reaching the small intestine. This will be confirmed by m-mode OCT. Once secured, we will start infusing Ionic solution into the intestine so that IPD Probe can measure the potential difference between this and the control reading. The control reading is measured by infusing the same ionic solution subcutaneously on large muscle groups.