Self‐Manipulating Sodium Ion Gradient‐Based Endogenic Electrical Stimulation Dressing for Wound Repair

Abstract

Abstract Endogenous electric field (EF) originating from differences in ionic gradients plays a decisive role in the wound healing process. Based on this understanding, a self‐manipulating sodium ion gradient‐based endogenic electrical stimulation dressing (smig‐EESD) is developed to achieve passive, non‐invasive, endogenic electrical stimulation of wounds, which avoids the side effects of electrode occupancy, electrochemical reactions, and thermal effects present in traditional exogenous electrical stimulation. smig‐EESD reduced the potential at the center of the wound by specifically absorbing Na+ in the exudate, ultimately strengthening the wound endogenous EF. Importantly, smig‐EESD converted the active transport dependent on Na + /K + ‐ATPase into passive diffusion by adsorbing extracellular matrix Na+, and the saved ATP consumption promoted tissue repair process. smig‐EESD regulated innate and adaptive immune responses by upregulating the secretion of multiple cytokines, thereby suppressing injury‐associated inflammatory responses and reducing scar formation. smig‐EESD reveals an endogenic electrical stimulation strategy that is independent of electrodes and circuits, and provides new insights into the future development of electronic medicine.