I did my sleep test about three years ago. To this day i have never seen the doctor who created my RX. My first machine was a Resmed Escape with a fixed pressure of 15. I felt like i was suffocating all the time. I was ready to quit til i found this forum and found out that my cpap machine was a crappy model with no data, and non variable pressure.
I went through hell trying to get the machine changed or upgraded. I went back to the sleep doctor and plead with them to do something different. The "technician", assistant, not sure what her training was, she said, "well you don't have to use it."
Out of desperation, I was telling my DME about it and he said that he would try contacting the doctor's office and get an RX for the Autoset machine with variable pressure. HE got it done and now i have the Autoset.
My point is, the doctor did little to nothing to help me.
I have always been polite and respectful, so i can understand the frustration some of us have with "the system".
The trick is to find the weak point in the system, the person that if you apply reasonable pressure will make the decision that you want. You can have
someone typically is approachable, you just have to find out who and how.