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[CPAP] CPAP vs BiPAP
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Keifer4 Offline

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Posts: 1
Joined: Mar 2012

Machine: Resmed S7
Mask Type: Full face mask
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Humidifier: none
CPAP Pressure: 9.3
CPAP Software: Not using software

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Sex: Male
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Post: #1
CPAP vs BiPAP
What is the difference between a CPAP and a BIPAP?
06-27-2013 06:18 PM
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RonWessels Offline

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Posts: 465
Joined: Jun 2013

Machine: REMstar Auto AFlex DS560TS
Mask Type: Nasal mask
Mask Make & Model: ComfortGel Blue
Humidifier: REMstar Heated Tube DS6T
CPAP Pressure: 11 - 20
CPAP Software: SleepyHead

Other Comments: CMS50F Pulse Oximeter

Sex: Male
Location: Ontario, Canada

Post: #2
RE: CPAP vs BiPAP
A CPAP produces a fixed pressure, whereas a BPAP produces different pressure at inhale vs at exhale. Now, complicating the issue is that modern CPAP machines implement an "exhale relief" feature (ResMed calls it EPR, Respironics calls it CFlex) whereby the pressure is lowered by up to 3 cmH2O when the machine detects an exhale.

The basic difference is that the inhale/exhale pressure difference on a CPAP machine is limited to 3 cmH2O, whereas a BPAP machine can have that difference up to 10 cmH2O. In addition, CPAP machines tend to be limited to a maximum pressure of 20 cmH2O, whereas BPAP machines tend to go up to 25 cmH2O.

Strictly speaking, "BiPAP" is the Respironics name for their BPAP (Bilevel Positive Airway Pressure) machines. According to Wikipedia, "BPAP" is the accepted generic term. I believe it is also called "VPAP" by some manufacturers.

Oh, and BPAP machines will be more expensive.
(This post was last modified: 06-27-2013 07:05 PM by RonWessels.)
06-27-2013 06:58 PM
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trish6hundred Offline

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Posts: 6,452
Joined: May 2012

Machine: Resmed S9 AutoSet for Her
Mask Type: Full face mask
Mask Make & Model: Fisher & Paykel Simplus
Humidifier: H5i Heated Humidifier
CPAP Pressure: 10 - 7-20 Cm H2O
CPAP Software: Not using software

Other Comments: I started CPAP in 2008. Totally blind since birth.

Sex: Female
Location: Missouri, USA

Post: #3
RE: CPAP vs BiPAP
Hi Keifer4,
WELCOME! to the forum.!
Hang in there for more answers to your question and best of luck.

trish6hundred
06-27-2013 07:15 PM
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zonk Offline

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Posts: 7,908
Joined: Feb 2012

Machine: A10 AutoSet
Mask Type: Nasal mask
Mask Make & Model: Activa LT
Humidifier: Integrated /ClimateLineAir
CPAP Pressure: 9/13
CPAP Software: ResScan

Other Comments: CPAP since Nov 2010

Sex: Male
Location: Australia

Post: #4
RE: CPAP vs BiPAP
beside cost, both treat obstructive apnea. ASV machines treat central apnea and other respiratory issues

the difference between inhale (IPAP) and exhale (EPAP) pressures of BIPAP (pressure support) can be set higher than CPAP expiratory pressure relief which can help someone who require high pressure or/and cannot tolerate breathing out against the pressure

should be one machine does all three modes ... CPAP, APAP, and bi-level
06-27-2013 07:52 PM
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