Post Reply 
[Equipment] Another strange noise from an S10
Author Message
archangle Offline
Wiki Editor
Advisory Members

Posts: 3,159
Joined: Feb 2012

Machine: ResMed S9 AutoSet
Mask Type: Nasal pillows
Mask Make & Model: ResMed Swift FX
Humidifier: ResMed S9 H5i
CPAP Pressure: 16-20
CPAP Software: ResScan SleepyHead EncoreBasic

Other Comments: Happy PAPper

Sex: Undisclosed
Location: USA

Post: #11
RE: Another strange noise from an S10
Please put your machine model into your profile. "S10" isn't enough. It should say what it is in the lower right corner of the front panel, below AirSense 10.

BTW, there is no "S10" model. ResMed says "AirSense 10" or "Air 10," but most of us say "A10."

ResMed uses what's called FOT Forced Oscillation Technique to try to distinguish central apnea from obstructive. Google it.

When you stop breathing, after 4 seconds or so, the machine starts sending little pulses of air down the hose to try and see if your airway is open.

Put on your machine, breathe for a while and then stop breathing. After about 4 seconds, it will start sending little pulses. You may or may not hear or feel the pulses. Depending on how the hose is lying, it may or may not move a bit.

Make a note of the time when you hear this sound. It will show up on your SleepyHead graphs as some "fuzz" on the mask pressure graph.

Get the free SleepyHead software here.
Useful links.
Click here for information on the main alternative to CPAP.
If it's midnight and a DME tells you it's dark outside, go and check it yourself.
05-06-2015 07:40 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
breathingwell Offline

Members

Posts: 13
Joined: Mar 2015

Machine: Resmed AirSense10 Autoset
Mask Type: Nasal pillows
Mask Make & Model: Resmed Swift FX
Humidifier: Resmed
CPAP Pressure: 6-16
CPAP Software: SleepyHead Other Software

Other Comments: SleepyHead v0.9.8-1

Sex: Male
Location: Indian River, MI & Hudson, FL

Post: #12
RE: Another strange noise from an S10
(05-06-2015 06:21 PM)trailrider Wrote:  The machine will send a series of rapid pulses of air at 0.25s intervals when you are having a CA event. It is trying to snap you out of it. This is described in the clinician's manual.

Quote page 8
The device detects both obstructive and central sleep apneas (CSA). CSA detection uses the Forced
Oscillation Technique (FOT) to determine the state of the patient’s airway during an apnea. When an
apnea has been detected, small oscillations in pressure (1 cm H2O peak-to-peak at 4 Hz) are added
to the current device pressure. The CSA detection algorithm uses the resulting flow and pressure
(determined at the mask) to measure the airway patency.
Thank you for that information. It would appear that could be what was going on. According to SleepyHead between 4:32 and 4:45 I had 10 CA's and the Cheyne Stokes breaths. During last night prior to that and after that was fairly clear. I had a total of 24 CA events for 8 hours. Total time in APNEA of 8:19. Higher than most nights.

I have also corrected my profile as I had not correctly identified my Resmed machine.
(This post was last modified: 05-06-2015 10:31 PM by breathingwell.)
05-06-2015 10:07 PM
Find all posts by this user Post Reply Quote this message in a reply
breathingwell Offline

Members

Posts: 13
Joined: Mar 2015

Machine: Resmed AirSense10 Autoset
Mask Type: Nasal pillows
Mask Make & Model: Resmed Swift FX
Humidifier: Resmed
CPAP Pressure: 6-16
CPAP Software: SleepyHead Other Software

Other Comments: SleepyHead v0.9.8-1

Sex: Male
Location: Indian River, MI & Hudson, FL

Post: #13
RE: Another strange noise from an S10
(05-06-2015 07:40 PM)archangle Wrote:  Please put your machine model into your profile. "S10" isn't enough. It should say what it is in the lower right corner of the front panel, below AirSense 10.

BTW, there is no "S10" model. ResMed says "AirSense 10" or "Air 10," but most of us say "A10."

ResMed uses what's called FOT Forced Oscillation Technique to try to distinguish central apnea from obstructive. Google it.

When you stop breathing, after 4 seconds or so, the machine starts sending little pulses of air down the hose to try and see if your airway is open.

Put on your machine, breathe for a while and then stop breathing. After about 4 seconds, it will start sending little pulses. You may or may not hear or feel the pulses. Depending on how the hose is lying, it may or may not move a bit.

Make a note of the time when you hear this sound. It will show up on your SleepyHead graphs as some "fuzz" on the mask pressure graph.

Archangel - thank you for correcting some misinformation I had about my machine. I have now corrected that on my profile and I will try your suggestion tonight when I am using the machine. I had tried to Google the term and of course I got an error message that Google was not available and I tried Yahoo Search and it gave me information about pulses in the feetThanks
05-06-2015 10:16 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
under pressure Offline

Preferred Members-2

Posts: 139
Joined: Feb 2014

Machine: ResMed Airsense 10 Autoset
Mask Type: Full face mask
Mask Make & Model: F&P Simplus
Humidifier: Integrated
CPAP Pressure: 11 - 14
CPAP Software: ResScan SleepyHead

Other Comments: Also use F&P Icon Auto and Z1 Auto for travel and Backup

Sex: Male
Location: Colorado

Post: #14
RE: Another strange noise from an S10
The FOT pulses are used to determine if your airway is blocked (obstructive apnea) or if your airway is open and you are just not breathing (central apnea). It is the method the machine uses to distinguish between the two kinds of apnea, it is NOT meant to "snap you" out of anything, just meant to distinguish between the two types of apnea.

The resulting flow or lack thereof helps the machine know what to do......if the FOT determines the airway is open (central apnea) the machine's algorithm will not raise pressure as that would not help a central apnea, it might actually make it worse. If on the other hand the FOT pulses show a closed airway as in obstructive apnea then the machine will raise pressure because that would be the proper response for an obstructive apnea.

Go to ResMed's web site for explanation of FOT.
05-06-2015 10:50 PM
Find all posts by this user Post Reply Quote this message in a reply
Post Reply 


Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  [CPAP] hose valve noise ArtistEd 7 235 12-05-2016 11:05 PM
Last Post: ArtistEd
  swift mask 'leak' noise--but not leaking... hegel 11 763 11-27-2016 09:53 PM
Last Post: Dangerous Dave
  Resmed S9 Escape, loud noise on inhale alacardkane 8 283 11-26-2016 06:20 PM
Last Post: Sleeprider
  [CPAP] Whining siren noise and bearing replacement/repair clintga 23 6,351 11-22-2016 02:52 PM
Last Post: Sleeprider
  [CPAP] ResMed AirSense 10 makes loud noise when inhaling. sanger 86 30,254 11-17-2016 09:14 PM
Last Post: comphelp
Question New Here - Strange Behaviour QT2U 26 1,832 10-23-2016 07:59 PM
Last Post: PaulaO2
  Airsense 10 autoset humming noise cheetah2112 8 1,005 09-22-2016 08:28 PM
Last Post: cheetah2112

Forum Jump:

Who's Online (Complete List)