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Long cycles visible in Sleepyhead
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tfield98 Offline

Members

Posts: 8
Joined: Jan 2016

Machine: AirSense 10 AutoSet
Mask Type: Nasal pillows
Mask Make & Model: ResMed AirSense 10 AutoSet
Humidifier: Built-in
CPAP Pressure: 4-7.4
CPAP Software: SleepyHead

Other Comments:

Sex: Male
Location: Seattle, WA USA

Post: #1
Long cycles visible in Sleepyhead
AHI was 15 when tested. Now AHI is usually less than 1

In Sleepyhead, I observe some long periodic cycles in mask pressure coinciding with most other measures (Tidal, Resp. rate, etc.) See attachment.

I'm just curious of these cycles reflect my sleep state (REM, etc.) or something else? Is the machine gradually lowering pressure to the minimum that works and then bumping it back up, or ???

Tom

Using:

ResMed AirSense 10
AutoSetModel
P10 Pillows
PAP Mode: APAP
Min 4 Max 8 (cmH2O)


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05-06-2016 03:56 PM
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big_dave Online

Advisory Members

Posts: 411
Joined: Apr 2012

Machine: PR System One DS560
Mask Type: Nasal pillows
Mask Make & Model: F&P Pilairo Q or ResMed Mirage Activa
Humidifier: PR System One
CPAP Pressure: 14 - 20
CPAP Software: SleepyHead

Other Comments: Former ResMed S8 Autoset II user

Sex: Male
Location: Eugene, Oregon

Post: #2
RE: Long cycles visible in Sleepyhead
Your machine is functioning as designed. With your low AHI, you don't need to do anything unless the pressure swings are bothering you.

The ResMed AutoSet algorithm always tries to get back to the machine's minimum pressure, and then it increases the pressure if it detects that it has dropped the pressure too far. It may be overcompensating a little. I doubt that it has anything to do with stages of sleep.

If the pressure swings are bothering you, you might want to increase the minimum pressure a little, or even switch to fixed pressure because you're already using a narrow pressure range. Don't tamper with success if you're not bothered by the pressure swings.
05-06-2016 04:31 PM
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richb Online

Advisory Members

Posts: 542
Joined: Jun 2015

Machine: Resmed AirCurve 10 ASV
Mask Type: Nasal mask
Mask Make & Model: ResMed Mirage FX
Humidifier: Built in
CPAP Pressure: Epap 6 Ipap 8 Auto ASV
CPAP Software: ResScan SleepyHead

Other Comments: Idiopathic Central Apnea

Sex: Male
Location: Vermont

Post: #3
RE: Long cycles visible in Sleepyhead
(05-06-2016 03:56 PM)tfield98 Wrote:  AHI was 15 when tested. Now AHI is usually less than 1

In Sleepyhead, I observe some long periodic cycles in mask pressure coinciding with most other measures (Tidal, Resp. rate, etc.) See attachment.

I'm just curious of these cycles reflect my sleep state (REM, etc.) or something else? Is the machine gradually lowering pressure to the minimum that works and then bumping it back up, or ???

Tom

Using:

ResMed AirSense 10
AutoSetModel
P10 Pillows
PAP Mode: APAP
Min 4 Max 8 (cmH2O)

Notice what stays constant? The flow rate. The machine is making adjustments to keep the flow rate constant. Changes in breathing during sleep cycles causes the machine to increase pressures to keep the flow rate constant.

Rich
05-06-2016 04:37 PM
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