I am speaking from personal experience and while from what I've been told complications are rare, both myself and my DD5 have experienced them. Here are our stories:
When I was a young child I had many ear infections. At age 6 (mid 1970's) I had my adenoids removed and tubes put in my ears. The tubes eventually came out and we thought all was well. At age 8 it was discovered that I had lost 75% of the hearing in my left ear. The hole from the tube had never closed up and actually got bigger leaving a large hole in my eardrum. I had to have reconstructive surgery on my left eardrum. At that time the surgery to repair my eardrum was relatively new and from what I was told (too young to remember exactly) took about 5 hours to complete. I do remember spending a week in the hospital though. I did regain the majority of my hearing in my left ear after the reconstructive surgery but to this day I still have chronic ear pain though actual infections are rare.
Fastforward to my second DD's first birthday... and her first ear infection. After 3 months of consecutive ear infections, at 15 months it was decided that she should have tubes put in her ears. I was not thrilled with the idea and was basically told that I was an anomaly and that my fears were unfounded. After the tubes fell out, it was discovered there was a perforation in her left eardrum that had not healed. Yes, you guessed it folks, the same ear that I had problems with 25 years earlier!! Needless to say I was extremely upset and angry that my concerns were blown off by the ENT that did her surgery. He left the state shortly after her diagnosis and we switched doctors (we would have anyway) to a pediatric ENT with a national reputation who has been wonderful, but the story does not end here.
Our new ENT had decided not to repair the perforated eardrum at that time since it was quite small and as he put it was acting like a "natural tube" and he thought she might need a second set of tubes he didn't want to close it up yet... she was about 2.5 at the time. Fast forward to this past summer, DD is now 5.5 and gets her first bad ear infection in nearly three years. Our ped is concerned with the condition of the perforated eardrum and sends us to the ENT. By the time of our appointment the infection has cleared up, and he tells us the ear looks good, the perforation is still there, but still acting as a tube so he's going to leave it alone.... but there is a serious problem with the right ear!
The tube in the right ear has not healed properly. I'm going to try to explain this the best I can, her eardrum had become depressurized. Instead of being tight like a drum, it was sucked into the ear in a kind of v-shape. He was afraid a cholesteotoma (a type of tumor) was forming. On September 23 he removed her adenoids hoping this would help her underdeveloped eustachian tubes and put a tube in her right ear with the hopes of repressurizing her eardrum. He also removed fiberous growths from her ear. Her right eardrum is extremely fragile. As of her post-op appointment in October, things are looking good. Her eardrum is back in the normal position and her hearing is in the low normal range which is consistent for children with tubes. She will go back in March to be examined and have another hearing test.
I fully expect that she will need further surgery to repair her eardums when she gets older but right now things look good. I did not write this to scare you, but I did want to relay my personal experience.
Mary