A sterile, semi-rigid or rigid plastic or metal tube that is inserted through a nostril until the distal tip reaches into one of the nasal sinuses during a ear/nose/throat (ENT) procedure. It is connected directly or through an external tube or catheter to an irrigation and/or suction system for irrigation, infusion, or withdrawal of substances. It is usually used together with a stylet for ease of insertion; when in place the stylet is withdrawn leaving an open channel for the escape or instillation of fluid. It may also be used as a port through which instruments and/or probes can be passed to perform a variety of diagnostic, treatment, or surgical procedures. This is a single-use device.