A Study of Subcutaneous Injection in Healthy Participants

This is a device feasibility study designed to evaluate the practicality of delivering a high-viscosity solution subcutaneously using various injection parameters, including volume, rate, and needle length. The goal is to assess the usability and operational performance of a delivery setup (Havard apparatus syringe pump and related components) to inform design requirements for future large-volume injection devices. No active drug is administered in this study, and no health outcomes are being evaluated. The study duration is approximately 40 days, including screening, injection assessments, and follow-up.