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[Pressure] Pressure Increase
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me50 Offline

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Posts: 2,559
Joined: Aug 2013

Machine: resmed S9 VPAP Auto
Mask Type: Nasal mask
Mask Make & Model: Wisp and Silicone Head gear
Humidifier: resmed H5i
CPAP Pressure: 18/8
CPAP Software: SleepyHead

Other Comments:

Sex: Undisclosed
Location: USA

Post: #11
RE: Pressure Increase
(03-02-2014 06:46 PM)DeepBreathing Wrote:  
(03-02-2014 11:28 AM)me50 Wrote:  I thought that pressure increases started when an apnea was detected, not before it was detected. I have done a little research on that to see but I still haven't found an article that explains the process. I have to admit that lately my time has been limited and I have not had time to spend specifically on this. I realize that the machine may use snoring and/or flow limitation to determine that an apnea is coming, but, I thought that the pressure increase wouldn't occur unless an apnea actually happened, not before. I do sleep on my back, not by choice, but necessity.

From the Resmed site: A ResMed device with AutoSet delivers only the pressure you need when you need it. It senses your pressure needs by monitoring your airflow. Certain patterns of airflow indicate the coming of an upper airway obstruction, which will cause an apnea, hypopnea, or snoring... Responds effectively - automatically increases the pressure if it detects flow limitation, snore, or apnea – giving you three lines of defence.

So it's a pretty smart machine - it can (sometimes) anticipate an apnea and prevent it before it happens.

Thanks Paul! Guess I should have been thinking b/c I had it somewhat wrong
03-02-2014 06:51 PM
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worn_out_in_lebanon Online

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Posts: 270
Joined: Jan 2015

Machine: Resmed A10 Autoset
Mask Type: Full face mask
Mask Make & Model: F20 (newest Resmed ffm)
Humidifier: Included, ClimateLine tubing
CPAP Pressure: 13-15, EPR:0
CPAP Software: SleepyHead

Other Comments: I.T. Project Manager. Started CPAP therapy March 16, 2015. Untreated AHI 39.

Sex: Male
Location: TN

Post: #12
RE: Pressure Increase
(03-02-2014 11:28 AM)me50 Wrote:  I thought that pressure increases started when an apnea was detected, not before it was detected. I have done a little research on that to see but I still haven't found an article that explains the process.

According to an article I found a week or so ago, there are "responding events" and "predictive events". The machines respond after the fact to an actual apnea. They change pressure proactively in the event of flow limitations and/or snoring.

http://www.apneaboard.com/forums/Thread-...ks-general
(This post was last modified: 03-30-2015 01:58 PM by worn_out_in_lebanon.)
03-30-2015 01:57 PM
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