Quick - How low can you go on BiPAP exhalation pressure?
Quick - How low can you go on BiPAP exhalation pressure?
I was planning on picking up an old cheap BiPAP Auto M Series to 10am this morning, thinking that the exhalation pressure can be set to zero or near zero (as opposed to 4cm, which I can already get to with my current machine with an EPR of 3 and a inhalation pressure of 7). But the manual seems to be saying the minimum pressure setting is 4cm. Can a newer/different model go lower than that?
I want zero resistance to breathing out, so is there a BiPAP machine in existence that can set that low of an exhalation pressure? Or am I not clear on the limitations or purpose of BiPAP.
I want zero resistance to breathing out, so is there a BiPAP machine in existence that can set that low of an exhalation pressure? Or am I not clear on the limitations or purpose of BiPAP.
_________________
Humidifier: S9™ Series H5i™ Heated Humidifier with Climate Control |
Additional Comments: S9 AutoSet, Pilario Q, Phillips DreamWear large and medium frame, Wisp, ResMed Quatro fx large and medium, AirFit P10, ResMed (Activa?) |
diagnosed: 6cm
PR BiPAP Auto M-series (700M) w/broken heater
ResMed S9 AutoSet
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ResMed quatro fx large & medium
RM “active cell” “shallow” (Activa?)
RM air fit P10
F&P Pilario Q
Phillips DreamWear large frame and medium frame
Phillips Wisp
PR BiPAP Auto M-series (700M) w/broken heater
ResMed S9 AutoSet
Masks:
ResMed quatro fx large & medium
RM “active cell” “shallow” (Activa?)
RM air fit P10
F&P Pilario Q
Phillips DreamWear large frame and medium frame
Phillips Wisp
- ChicagoGranny
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Re: Quick - How low can you go on BiPAP exhalation pressure?
Wow. Even for a small, elderly woman, (like me) 4 cm is barely perceptible on exhale.
What's going on that you have such a problem with exhale?
What's going on that you have such a problem with exhale?
Re: Quick - How low can you go on BiPAP exhalation pressure?
Zero resistance = turn the machine offphopap wrote:
I want zero resistance to breathing out, so is there a BiPAP machine in existence that can set that low of an exhalation pressure? Or am I not clear on the limitations or purpose of BiPAP.
_________________
Machine: ResMed AirSense™ 10 AutoSet™ CPAP Machine with HumidAir™ Heated Humidifier |
Mask: Fisher & Paykel Vitera Full Face Mask with Headgear (S, M, or L Cushion) |
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Re: Quick - How low can you go on BiPAP exhalation pressure?
4 cm is pretty much as low as any of the cpap/apap/bipap machines can go.
There is one machine that might do 3 cm but that's it and I forget which brand it is.
There is one machine that might do 3 cm but that's it and I forget which brand it is.
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If you want to try the Eclipse mask and want a special promo code to get a little off the price...send me a private message.
Re: Quick - How low can you go on BiPAP exhalation pressure?
That's the DeVilbiss IntelliPAP AutoBiLevel.Pugsy wrote:4 cm is pretty much as low as any of the cpap/apap/bipap machines can go.
There is one machine that might do 3 cm but that's it and I forget which brand it is.
To the OP: 3 or 4 cm is as low as an xPAP machine goes. That much positive air pressure is needed to ensure that the CO2 you exhale is properly vented.
It's the difference in IPAP and EPAP pressure that can make it easier to exhale with a bilevel. You may find using a PS = 4 or 4.5 cm (which can't be done on an APAP) is enough of a drop in pressure that exhaling is easier than with a Resmed APAP with EPR = 3.
_________________
Machine: DreamStation BiPAP® Auto Machine |
Mask: Swift™ FX Nasal Pillow CPAP Mask with Headgear |
Additional Comments: PR System DreamStation and Humidifier. Max IPAP = 9, Min EPAP=4, Rise time setting = 3, minPS = 3, maxPS=5 |
Re: Quick - How low can you go on BiPAP exhalation pressure?
Pugsy:
DeVilbiss Intellipap DV57 Auto Bi-level may be the one you remember.
Bilevel Pressure Range.......................................................................................................3-25 cmH2O
But even setting the min to 3 cm H2O might not feel all that different from 4 cm H2O.
DeVilbiss Intellipap DV57 Auto Bi-level may be the one you remember.
Bilevel Pressure Range.......................................................................................................3-25 cmH2O
But even setting the min to 3 cm H2O might not feel all that different from 4 cm H2O.
_________________
Mask: Oracle HC452 Oral CPAP Mask |
Humidifier: DreamStation Heated Humidifier |
Additional Comments: EverFlo Q 3.0 Liters O2 PR DSX900 ASV |
Oracle 452 Lessons Learned Updated
DSX900 AutoSV with HC150 extra humidifier and Hibernite heated hose
Settings: EPAP Min-10.0, EPAP Max-17, PS Min-3, PS Max-10, Max Pressure-20, Rate-Auto, Biflex-1.
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DSX900 AutoSV with HC150 extra humidifier and Hibernite heated hose
Settings: EPAP Min-10.0, EPAP Max-17, PS Min-3, PS Max-10, Max Pressure-20, Rate-Auto, Biflex-1.
Sleepyhead and Encore Pro 2.21.
Re: Quick - How low can you go on BiPAP exhalation pressure?
Exhaling pressure of 5 cm H2O in a CPAP is similar to using a straw to blow bubbles in a glass with less than 2 inches of water in it.
Try it out.
Try it out.
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see my recent ResScan treatment results:
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Re: Quick - How low can you go on BiPAP exhalation pressure?
Only if you put the farthermost end of the straw at the bottom of the glass.avi123 wrote:Exhaling pressure of 5 cm H2O in a CPAP is similar to using a straw to blow bubbles in a glass with less than 2 inches of water in it.
Re: Quick - How low can you go on BiPAP exhalation pressure?
I wish I knew. Right now I wish I was a small, elderly woman At the end of my exhales I observe that I'm not finished breathing out and the pressure from the machine is preventing the completion of my exhalation, and my physical response is that I'm suffocating.ChicagoGranny wrote:Wow. Even for a small, elderly woman, (like me) 4 cm is barely perceptible on exhale.
What's going on that you have such a problem with exhale?
_________________
Humidifier: S9™ Series H5i™ Heated Humidifier with Climate Control |
Additional Comments: S9 AutoSet, Pilario Q, Phillips DreamWear large and medium frame, Wisp, ResMed Quatro fx large and medium, AirFit P10, ResMed (Activa?) |
diagnosed: 6cm
PR BiPAP Auto M-series (700M) w/broken heater
ResMed S9 AutoSet
Masks:
ResMed quatro fx large & medium
RM “active cell” “shallow” (Activa?)
RM air fit P10
F&P Pilario Q
Phillips DreamWear large frame and medium frame
Phillips Wisp
PR BiPAP Auto M-series (700M) w/broken heater
ResMed S9 AutoSet
Masks:
ResMed quatro fx large & medium
RM “active cell” “shallow” (Activa?)
RM air fit P10
F&P Pilario Q
Phillips DreamWear large frame and medium frame
Phillips Wisp
Re: Quick - How low can you go on BiPAP exhalation pressure?
Terms: Does "xPAP" mean "any of the various types of CPAP"? "PS" means what?robysue wrote:Pugsy wrote: To the OP: 3 or 4 cm is as low as an xPAP machine goes. That much positive air pressure is needed to ensure that the CO2 you exhale is properly vented.
It's the difference in IPAP and EPAP pressure that can make it easier to exhale with a bilevel. You may find using a PS = 4 or 4.5 cm (which can't be done on an APAP) is enough of a drop in pressure that exhaling is easier than with a Resmed APAP with EPR = 3.
_________________
Humidifier: S9™ Series H5i™ Heated Humidifier with Climate Control |
Additional Comments: S9 AutoSet, Pilario Q, Phillips DreamWear large and medium frame, Wisp, ResMed Quatro fx large and medium, AirFit P10, ResMed (Activa?) |
diagnosed: 6cm
PR BiPAP Auto M-series (700M) w/broken heater
ResMed S9 AutoSet
Masks:
ResMed quatro fx large & medium
RM “active cell” “shallow” (Activa?)
RM air fit P10
F&P Pilario Q
Phillips DreamWear large frame and medium frame
Phillips Wisp
PR BiPAP Auto M-series (700M) w/broken heater
ResMed S9 AutoSet
Masks:
ResMed quatro fx large & medium
RM “active cell” “shallow” (Activa?)
RM air fit P10
F&P Pilario Q
Phillips DreamWear large frame and medium frame
Phillips Wisp
Re: Quick - How low can you go on BiPAP exhalation pressure?
Is the machine reversing pressure from exhale to the higher inhale pressure, like it's not following your breathing?
_________________
Machine: ResMed AirCurve 10 ASV Machine with Heated Humidifier |
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Re: Quick - How low can you go on BiPAP exhalation pressure?
By "reversing", I guess you mean "switching" the pressure back to the higher inhale pressure. That's a good question - if, hypothetically, it's not following my breathing, how would I confirm that is occurring, and how would I fix the problem?klv329 wrote:Is the machine reversing pressure from exhale to the higher inhale pressure, like it's not following your breathing?
_________________
Humidifier: S9™ Series H5i™ Heated Humidifier with Climate Control |
Additional Comments: S9 AutoSet, Pilario Q, Phillips DreamWear large and medium frame, Wisp, ResMed Quatro fx large and medium, AirFit P10, ResMed (Activa?) |
diagnosed: 6cm
PR BiPAP Auto M-series (700M) w/broken heater
ResMed S9 AutoSet
Masks:
ResMed quatro fx large & medium
RM “active cell” “shallow” (Activa?)
RM air fit P10
F&P Pilario Q
Phillips DreamWear large frame and medium frame
Phillips Wisp
PR BiPAP Auto M-series (700M) w/broken heater
ResMed S9 AutoSet
Masks:
ResMed quatro fx large & medium
RM “active cell” “shallow” (Activa?)
RM air fit P10
F&P Pilario Q
Phillips DreamWear large frame and medium frame
Phillips Wisp
Re: Quick - How low can you go on BiPAP exhalation pressure?
3cmh2o is the lowest i've seen on a bi-level machine. The Resmed AirCurve 10 vAUTO can be set that low.
Machine: ResMed AirCurve 10 ST
Mask: Fisher & Paykel Simplus FFM
Mask: Fisher & Paykel Simplus FFM
Re: Quick - How low can you go on BiPAP exhalation pressure?
Hypothetically, you would check it against a backup machine or two.
_________________
Machine: ResMed AirCurve 10 ASV Machine with Heated Humidifier |
Mask: Swift™ LT Nasal Pillow CPAP Mask with Headgear |
Additional Comments: Resmed Aircurve 10 ASVAUTO Min Epap 10.4, Max Epap 11.6, PS 1.6-12.0 |
Re: Quick - How low can you go on BiPAP exhalation pressure?
At this point it would be helpful if you could use the User Control Panel to fill in your equipment profile.
Some CPAP's are quicker to turn around from exhale to inhale than others and that may be what is happening to you.
Most users are not sensitive to this effect but, rarely, some are. Because of commentary on this forum concerning this issue, I chose a Respironics machine instead of a ResMed because I felt that it might be an issue for me.
PS generally refers to Pressure Support, or the difference between exhale pressure and inhale pressure. The exact definition depends on the manufacturer and on the exact model of machine. On my machine, it tells the firmware (software controlling the machine) what the minimum difference it must maintain between the two. The maximum difference is the pressure difference between minimum EPAP value and the maximum IPAP value (or maximum pressure whichever is lowest).
ResMed machines do it differently and also take into account a function called EPR. I'm not up to speed on the ins and outs of that line of machine.
Some CPAP's are quicker to turn around from exhale to inhale than others and that may be what is happening to you.
Most users are not sensitive to this effect but, rarely, some are. Because of commentary on this forum concerning this issue, I chose a Respironics machine instead of a ResMed because I felt that it might be an issue for me.
PS generally refers to Pressure Support, or the difference between exhale pressure and inhale pressure. The exact definition depends on the manufacturer and on the exact model of machine. On my machine, it tells the firmware (software controlling the machine) what the minimum difference it must maintain between the two. The maximum difference is the pressure difference between minimum EPAP value and the maximum IPAP value (or maximum pressure whichever is lowest).
ResMed machines do it differently and also take into account a function called EPR. I'm not up to speed on the ins and outs of that line of machine.
_________________
Mask: Oracle HC452 Oral CPAP Mask |
Humidifier: DreamStation Heated Humidifier |
Additional Comments: EverFlo Q 3.0 Liters O2 PR DSX900 ASV |
Oracle 452 Lessons Learned Updated
DSX900 AutoSV with HC150 extra humidifier and Hibernite heated hose
Settings: EPAP Min-10.0, EPAP Max-17, PS Min-3, PS Max-10, Max Pressure-20, Rate-Auto, Biflex-1.
Sleepyhead and Encore Pro 2.21.
DSX900 AutoSV with HC150 extra humidifier and Hibernite heated hose
Settings: EPAP Min-10.0, EPAP Max-17, PS Min-3, PS Max-10, Max Pressure-20, Rate-Auto, Biflex-1.
Sleepyhead and Encore Pro 2.21.