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[Pressure] What is mean- support pressure on auto BIPAP
#1
Hello, I'm back with another question.
From yesterday I switched on an rented auto bipap from an auto cpap(also rented) because I had problems with my ears(barotrauma) due to expiratory pressure.
And now, I am trying to understand the role of Min.and Max.pressure support on my auto PRS One Bipap -Bi flex(D760 model). I have done some reading, but still don't understand how pressure support works.
My DME set the I/E pressure on my rented machine thus; Ip=12, Ep=4, bi-flex=2 and Min & Max SupPress=0, but i guess something is goes wrong, as though something would explode in my nostrils when inspire.
On the autoCpap the pressure was set to 8-12.
Thank you.
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#2
G'day adin67. It's a little while since I read anything about how pressure support works, so my memory might be a bit hazy...

Basically on bipap type machines the exhale pressure (epap) is set to maintain a patent airway, to try and prevent the onset of obstructive apneas. The inhale pressure (ipap) is varied in response to flow limitations and apneas. The difference between epap and ipap is the pressure support. ipap = epap + ps So if your EPAP = 10 and your PS = 5, then ipap = 10 + 5 = 15.

With auto bilevel machines, both the epap and ps are automatically adjusted up and down to optimise the therapy. There's a good diagram to explain this here:
http://www.resmed.com/uk/assets/images/t...-pic-l.jpg
DeepBreathing
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