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Nasal catheters designed to widen the Eustachian tube passages to restore normal drainage and function. These catheters typically consist of a soft plastic tube that is introduced to reach the pharyngeal ostium of the Eustachian tube through a dedicated nasal endoscope (i.e., a micronasoscope). The catheter includes a balloon at its distal tip intended to enlarge the patient\'s Eustachian tube, clearing the passageways and restoring normal tube opening, ventilation, and drainage. Eustachian tube dilation catheters are typically used during minimally invasive endoscopic surgery procedures such as those performed to treat otitis media.
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