Post Reply 
Author Message
robysue Online
Wiki Editor
Advisory Members

Posts: 1,247
Joined: Oct 2013

Machine: PR Dreamstation BiPAP Auto
Mask Type: Nasal pillows
Mask Make & Model: Swift FX
Humidifier: PR Dreamstation humidfier
CPAP Pressure: min EPAP = 4; max IPAP = 9;
CPAP Software: SleepyHead EncoreBasic EncorePro

Other Comments: Papping since September 2010

Sex: Female
Location: Buffalo, NY

Post: #11
(02-18-2014 01:31 AM)Kate Wrote:  I don't know why the ASV machine isn't quieter. They say it is but it really isn't.
The ASV is changing the pressure much more often and in greater increments over shorter periods of time if you are using it in ASV mode. (And if you're not using ASV mode, then the question becomes: Why were you switched to such an expensive machine.)

In ASV mode, the machine will quite drastically increase the IPAP pressure over one or more inhalations while leaving the EPAP along when it is not happy with the way you are breathing---it's doing that in an effort to trigger inhalations. That's how this machine treats central apneas---it triggers an inhalation by increasing the difference between IPAP and EPAP when you are not breathing sufficiently well on your own, so on every timed or triggerd inhalation the pressure increases by as much as 10cm above the current EPAP pressure. And that, in turn, helps keep the CO2 overshoot/undershoot cycle from developing. But that 10cm increase in pressure on each inhalation can also be noisier than a plain old APAP.

So some of what you're dealing with is just the nature of the machine you are now using. Face farts are an issue with people using ASV machines simply because the sudden and significant pressure increases make it harder to keep a really sound seal on the mask once the ASV algorithm kicks in and starts triggering inhalations.
02-19-2014 10:35 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
JohnNJ Offline

Preferred Members-2

Posts: 103
Joined: Oct 2013

Machine: ResMed S9 AutoSet & ResMed Power Station II
Mask Type: Nasal pillows
Mask Make & Model: Respironics Wisp & ResMed Swift FX
Humidifier: ResMed H5i & ClimateLine (distilled / fresh daily)
CPAP Pressure: 9.4 - 10
CPAP Software: ResScan SleepyHead

Other Comments: First night - November 25, 2013

Sex: Male
Location: New Jersey, USA

Post: #12
Try wearing socks on your hands. It will not be as easy to remove your mask and you may wake up enough to figure out what the problem is. Just a suggestion before you try anything else.
02-20-2014 09:51 AM
Find all posts by this user Post Reply Quote this message in a reply
Kate Offline

Preferred Members

Posts: 85
Joined: Dec 2013

Machine: ResMed S9 VPAP S
Mask Type: Full face mask
Mask Make & Model: Philips Resperonics FitLife
Humidifier: ResMed S5i
CPAP Pressure: 8/4
CPAP Software: ResScan

Other Comments: VPAP always makes me feel like my avatar.

Sex: Female
Location: Poulsbo, Washington

Post: #13
I love it! lol !!!Thank you for the explaination of why this is happening and the socks.


:Using cpap then vpap since Feb.2013,
02-20-2014 11:39 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
Post Reply 

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  [Treatment] CPAP Habit forming? racprops 13 3,076 09-12-2013 06:08 PM
Last Post: archangle

Forum Jump:

Who's Online (Complete List)