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[Pressure] Pressure Increase
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me50 Offline

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Post: #1
Pressure Increase
What would cause a machine to increase the pressure when there isn't an event, snoring, leaks, etc.? I also noticed that there was a cluster of events with leaks well controlled but the pressure was not increased.
(This post was last modified: 03-01-2014 10:59 PM by me50.)
03-01-2014 10:39 PM
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DeepBreathing Offline
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Machine: Resmed S9 VPAP Adapt
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Location: Perth, Western Australia

Post: #2
RE: Pressure Increase
(03-01-2014 10:39 PM)me50 Wrote:  What would cause a machine to increase the pressure when there isn't an event, snoring, leaks, etc.?

Poltergeist? Wink

Maybe it was an event you're not monitoring like a flow limitation? Can you post a screendump of the relevant graphs?

DeepBreathing
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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
03-01-2014 10:50 PM
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me50 Offline

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Posts: 2,559
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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

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Sex: Undisclosed
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Post: #3
RE: Pressure Increase
(03-01-2014 10:50 PM)DeepBreathing Wrote:  
(03-01-2014 10:39 PM)me50 Wrote:  What would cause a machine to increase the pressure when there isn't an event, snoring, leaks, etc.?

Poltergeist? Wink

Maybe it was an event you're not monitoring like a flow limitation? Can you post a screendump of the relevant graphs?

can show you the data. do you want to see pressure, events, leaks or which ones?
03-01-2014 11:00 PM
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DeepBreathing Offline
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Machine: Resmed S9 VPAP Adapt
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CPAP Software: ResScan SleepyHead

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Sex: Male
Location: Perth, Western Australia

Post: #4
RE: Pressure Increase
(03-01-2014 11:00 PM)me50 Wrote:  can show you the data. do you want to see pressure, events, leaks or which ones?

Let's try pressure, leak, flow limitation, snore, respiration rate and event flags. That should cover most things.

DeepBreathing
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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
03-01-2014 11:07 PM
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me50 Offline

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Machine: resmed S9 VPAP Auto
Mask Type: Nasal mask
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CPAP Software: SleepyHead

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Post: #5
RE: Pressure Increase
I do sleep on my back because I cannot go to sleep when I try to sleep on my side (which is my favorite sleeping position) and because of another issue. I try to sleep on my side every night and I lay there awake.
(This post was last modified: 03-02-2014 03:18 AM by me50.)
03-01-2014 11:55 PM
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DeepBreathing Offline
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Machine: Resmed S9 VPAP Adapt
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CPAP Software: ResScan SleepyHead

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Sex: Male
Location: Perth, Western Australia

Post: #6
RE: Pressure Increase
Hi me50

From that chart it looks like each pressure increase was initiated by a cluster of flow limitations. According to the Apnea Board wiki, these are: "Partial closure of the upper airway, which impedes the flow of air into the lungs". As I understand it, your airway is trying to relax into an apnea condition, so the machine senses this and raises the pressure to keep the airway patent, preventing the apnea from occurring.

DeepBreathing
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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
03-02-2014 12:06 AM
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zonk Offline

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Post: #7
RE: Pressure Increase
(03-01-2014 10:39 PM)me50 Wrote:  What would cause a machine to increase the pressure when there isn't an event, snoring, leaks, etc.?
Snoring, flow limitation and some mouth breathing/leaks especially the period around 11 and 11.30

If you sleep on your back ... try to avoid it and sleep on your side
(This post was last modified: 03-02-2014 02:35 AM by zonk.)
03-02-2014 02:16 AM
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Lukie Offline

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Post: #8
RE: Pressure Increase
(03-02-2014 12:06 AM)DeepBreathing Wrote:  Hi me50

As I understand it, your airway is trying to relax into an apnea condition, so the machine senses this and raises the pressure to keep the airway patent, preventing the apnea from occurring.

Mmmmm that may be why my machine is increasing the pressure from 6 to 10 which in turn causes me to overbreathe and have a cluster of centrals. You're damned if you do and damned if you don't.
Is it better to have a bunch of hyponeas or a bunch of centrals.
I think my centrals last longer than my hyponeas.
03-02-2014 10:51 AM
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me50 Offline

Advisory Members

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: #9
RE: Pressure Increase
(03-02-2014 10:51 AM)Lukie Wrote:  
(03-02-2014 12:06 AM)DeepBreathing Wrote:  Hi me50

As I understand it, your airway is trying to relax into an apnea condition, so the machine senses this and raises the pressure to keep the airway patent, preventing the apnea from occurring.

Mmmmm that may be why my machine is increasing the pressure from 6 to 10 which in turn causes me to overbreathe and have a cluster of centrals. You're damned if you do and damned if you don't.
Is it better to have a bunch of hyponeas or a bunch of centrals.
I think my centrals last longer than my hyponeas.

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.
03-02-2014 11:28 AM
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DeepBreathing Offline
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Posts: 2,296
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Machine: Resmed S9 VPAP Adapt
Mask Type: Full face mask
Mask Make & Model: F&P Simplus
Humidifier: Resmed H5i
CPAP Pressure: EPAP: 9 - 15 PS: 3 - 10
CPAP Software: ResScan SleepyHead

Other Comments:

Sex: Male
Location: Perth, Western Australia

Post: #10
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. 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.

DeepBreathing
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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
03-02-2014 06:46 PM
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