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PRS1 BiPAP Auto -- True max pressure?
06-12-2013, 03:03 AM
Regarding the PR System One, Series 60, Auto BiPAP, is the maximum inhale pressure a true maximum? For example, if one sets the max inhale at 20 cm H2O, and one experiences a complete airway blockage that cannot be broken through with a pressure of 20, will the machine increase pressure short term over 20 to break through the blockage.
06-12-2013, 01:17 PM
No, it only goes to 20. For higher, you have to get another machine. Some VPAPs and bilevels go higher I think.
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06-12-2013, 10:23 PM
(06-12-2013, 01:17 PM)PaulaO2 Wrote: No, it only goes to 20. For higher, you have to get another machine. Some VPAPs and bilevels go higher I think.
I checked with a supplier (commercial DME link removed). They said that the bipap auto has a max inhale setting of 25 cm h20.
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06-13-2013, 09:30 AM
(06-12-2013, 03:03 AM)Apnea 1 Wrote: Regarding the PR System One, Series 60, Auto BiPAP, is the maximum inhale pressure a true maximum? For example, if one sets the max inhale at 20 cm H2O, and one experiences a complete airway blockage that cannot be broken through with a pressure of 20, will the machine increase pressure short term over 20 to break through the blockage.
No, if it's set to a maximum of 20, it won't go above 20, even if you stop breathing.
Some machines can be set to a higher maximum, but they don't go above the "maximum" setting.
CPAP and BiPAP(bilevel) machines do not adjust pressure breath by breath. If you're having a lot of apneas, some of them will slowly increase the pressure over a period of several minutes.
ASV machines and some ventilators may take a "breath by breath" approach and rapidly increase pressure to make you take a breath now if you don't breathe on your own. "CPAP" or "bilevel" machines are sort of only concerned about how you breathe over a period of several minutes.
By the way, "breaking through" is sort of the wrong way to think about it. CPAP machines sort of "allow" you to breathe by reinflating a collapsed airway. They don't try to "push" air into your lungs past an obstruction. Think of it as trying to unkink the hose rather than trying force air through it. Remember you have to exhale against the CPAP pressure, too.
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