Questions about the Use of a Trelegy Machine

Hello Everyone, Pt diagnosed with COPD and congestive heart failure this time last year. Has been readmitted 1/19/18 to 1/31/18 out for about 2 weeks and admitted again for 4 days for shortness of breath and slight fever. Went to the PCP Tues. for follow-up and there was talk of placing her on a triolgy machine. She currently uses an oxygen cannula during the day and a Bipap at night.

My questions are;
1)...Is this almost the same as a Bipap?
2)...How is it different?
3)...Do they prescribe this for end stage COPD?
4)...Does the use of a Triolgy machine mean permanent use?
5)...What are the pros and cons of use?
6)...How do patients feel about use it?
7)...Any questions to ask the pulmonary Dr next Friday?

Any help is greatly appreciated.