Hyperdermoclysis is a medical technique used to administer fluids subcutaneously, typically in patients who are unable to receive intravenous therapy. It involves the infusion of isotonic solutions into the tissue under the skin, allowing for gradual absorption into the bloodstream. This method is often employed in elderly patients or those with dehydration, providing an alternative to traditional IV hydration. Hyperdermoclysis is generally considered safe and can help improve patient comfort and hydration status.