What is the next step in treating eustachian tube dysfunction if the " long term" tubes fail? obviously you can't keep having surgery every few years

Can repeat tubes: Actually, many people do get multiple sets of tubes throughout their adult life. There has been some papers on laser tuboplasty to surgically enlarge the eustachian tube and some attempts at stenting the et opening, but so far no consistently good results are available to alter practice patterns among most ENT doctors. It's a difficult problem with imperfect solutions at this point