Can pe tubes fall backward into the head instead of into the ear canal?

Unlikely. I have seen this once in 15 years... It happens but highly unlikely.
Ear tubes. Yes, tympanostomy tubes can fall into the middle ear although infrequently. I have seen it only twice in my umpteenth years of practice.

Related Questions

My 3 year old is on her 2nd set of pe tubes (t&a removed).Left tube is in the ear canal & is infectioned. Is it recommended/safe to replace this tube?

Ear tubes. If the tube has come out and infections return, it is reasonable to replace the tube. Consider adenoidectomy if it hasn't been done yet. Don't worry, your child will most likely grow out of this. Read more...
Seek Consult. Discuss this with your doctor. Replacing the tube is safe and a standard procedure, but your child may not require this if they only have a few infections now. As mentioned, the vast majority of children get through this. And many need replacement tubes, so don't worry. Discuss this with your doctor as the answer depends on the specifics with your child. Read more...

I take nasal spray lying down before sleep then I sleep on my left side can nasal spray block the ear canal/eustachian tube thanks?

It Can. The eustachian tubes open on each side above and behind the soft palate. If there is liquid covering the "cup" where the eustachian tube opens, then yes, the fluid can run down the tube towards the back of the ear drum. Read more...
Doubtful. It would be highly unlikely. But the nasal spray is designed to be used when you are in an upright position and thus i would not recommend using it lying down since it will likely be less effective. Read more...

As a pilot, I use a headset with foam tips that go into ear canal. I also suffer from frequent otitis media. Can they be related? Ent is considering tympanostomy. Can I use this headset w/ ear tubes?

Ask ENT. There shouldn't be a reason why you cannot continue to use your headset with ear tubes in place. Discuss your concerns with the ENT doctor prior to the procedure. Read more...
Ear infections. When anything, including q tips, fingers, or other foreign objects are inserted into the ear canals, many things can happen. All these and especially your headset foam tips are a culture medium for bacteria. Soft tissue infections of the canals, eardrums, or middle ear can result, and the foam tips can push foreign material, wax, dirt, or other debris into the canals or drum. See your ENT doc. Read more...