The 3-way stopcock is indicated for managing flow in infusion therapies, allowing for the simultaneous or alternating administration of solutions, diverting the fluid flow, and access for in-line sampling or additions. Used in hospitals, clinics, emergency rooms, nursing homes, and home care services, it is particularly useful for treatments requiring precise flow control, continuous infusion therapy, venous access management, and procedures requiring the integration of multiple drugs or solutions without interrupting the infusion.