I would guess there is nothing wrong with that machine.
There is pressure and there is flow. The pressures used in CPAP are in centimeters of water. Like the pressure to hold up a column of water 12 centimeters high.
Flow, the machine needs to be able to produce enough flow to attain the set pressure while you inhale plus an acceptable leak number. It's a small blower in there. This is no "Hoover." An open end hose is not going to produce much breeze -- it was never intended to.
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An in-lab sleep test is pretty definitive. If it indicates apena, you've really got it.
The effects of untreated apnea can be very serious. If you can stand it, CPAP is usually nearly a complete cure.
While it's possible that your machine was defective, I think you may have just misunderstood things.
To many people, you feel like you're trying to breathe into a hurricane when you first put it on. After you do it for a while, your lungs and chest muscles adapt to it, and you feel it much less. I use a pressure of 16, and I have to put my hand in the airflow to convince myself the machine is blowing.
Apnea is real, CPAP is real.
Many of the DME's (CPAP sellers) are shady characters who are used to ripping off patients on price and billing and give substandard service. However, the therapy is real and does save lives and improves the health of many people. I don't think many people are given CPAP if they don't really need it.
Get the free SleepyHead software here
for information on the main alternative to CPAP.
If it's midnight and a DME tells you it's dark outside, go and check it yourself.