My bridge angel Foxy was diagnosed with LP 2 years before she left us. Interestingly enough she had had a hemangiopericytoma removed 2 years prior to that.
We opted not to do the surgery, mostly because we didn't find a vet who had a lot of experience doing the surgery. We did manage to keep her comfortable and crisis free for those 2 years with only one hospitalization. Keeping her cool was crucial, as was keeping her calm with no trips outside the house as that would get her too excited and made her breathing worse. We inititally treated with benedryl, but had pred on hand to give if the benedryl didn't work.
We learned the hard way not to take her ANYWHERE 6 months later as I had taken her to a friends where we were having a blood donor clinic. The vet techs who ran it were going to do a blood panel on her. I figured we would be okay as medical help was there, and she was familiar with the house and people It turned out to be a really bad move. She got really happy excited, and wouldn't settle down. We gave her some pred which she promptly vomitted. Then her breathing became really laboured. It took her home and when after 15 minutes she didn't improve we took her to an eVet and she was admitted in guarded condition. The next day, our vet sent her home and gave us something to calm her should we ever need it. We never took her anywhere but the vets from then on. She actually did pretty well with her own treatment plan for another year. In the end Foxy left us when her body just gave up at age 13 3/4. Ironically her breathing was fine at the end.