Exfixiation Meaning?

What is the meaning of the word Exfixiation?
It's very easy to confuse Exfixiation with Asphyxiation but I'm not sure they mean the same thing.
Asphyxiation is when you can't breathe but what is Exfixiation?
Searched the dictionary and the word is not listed.

That's a new word for me.

Asphyxia is a condition of severely deficient supply of oxygen to the body that arises from being unable to breathe normally. An example of asphyxia is choking. Asphyxia causes generalized hypoxia, which primarily affects the tissues and organs.

Exfixiation must be related.
Maybe is the presence of too much air wich is also bad for you.

It's just spelled incorrectly. It was being spelled phonetically.