I’m a paramedic so I’m somewhat familiar with this procedure used on humans mainly temporary after a traumatic injury. They can be permanent but from my understanding can have significant complications since the body treats it as a foreign object. He will probably still have some airway issues and have to take meds for the rest of his life.

I asked a vet I know and he sent me this link. Pretty informative. I hope it helps.

https://leadervet.com/articles-papers/tracheal-stent-implantation-for-canine-tracheal-collapse/