I'm going to jump in here a bit. No, the eustachian tubes are part of the middle ear and they can become clogged and infected. Kids especially are prone to ear infections there but the eustachian tubes are not what the doctors insert into the kids' ears for drainage. We adults may have infections in them along with the sinuses and usually have decongestants to unblock them. (It's spring and that's what I'm dealing with now....)