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[Diagnosis] Can someone explain
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weeble Offline

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Machine: Resmed AirSense Autoset For Her S10
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Sex: Female
Location: Gold Coast Australia

Post: #1
Can someone explain
Hi again,
Sorry if this has been asked before - but can someone explain to me what exactly Flow Limitation is?

Last night my readings were all over the place and I noticed that my snoring was right up and above the very loud level. Looking back, when the flow limitation is steady, the snoring is minimal
Thanks in advance
09-04-2012 08:02 PM
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lonnieb Offline

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Machine: ResMed S9
Mask Type: Nasal mask
Mask Make & Model: Phillips ComfortGel Blue
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CPAP Pressure: 7 - 13
CPAP Software: ResScan SleepyHead

Other Comments: I intend to live forever. So far, so good:Steven Wright

Sex: Male
Location: Tennessee

Post: #2
RE: Can someone explain
hi weeble: I did a search and came up with this ,I didn't know either
Wikipedia: "Respiratory minute volume (or minute ventilation, or flow of gas) is the volume of air which can be inhaled (inhaled minute volume) or exhaled (exhaled minute volume) from a person's lungs in one minute...A normal minute volume is about 5–8 liters per minute in humans."


http://www.resmed.com/in/clinicians/comp...nc=dealers
09-04-2012 08:24 PM
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Sleepster Offline
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Machine: ResMed AirCurve10 VAuto
Mask Type: Full face mask
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CPAP Pressure: MaxI 13.6 | MinE 5.2 | PS 4.4
CPAP Software: ResScan SleepyHead

Other Comments: Diagnosed Nov 2011. Conquered aerophagia.

Sex: Male
Location: Houston, Texas

Post: #3
RE: Can someone explain
From our Apnea Board Wiki ...

Flow Limitation - Partial closure of the upper airway, which impedes the flow of air into the lungs.

Sleepster
Apnea Board Moderator
www.ApneaBoard.com


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.
(This post was last modified: 09-04-2012 08:39 PM by Sleepster.)
09-04-2012 08:32 PM
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zonk Offline

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Posts: 7,908
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Machine: A10 AutoSet
Mask Type: Nasal mask
Mask Make & Model: Activa LT
Humidifier: Integrated /ClimateLineAir
CPAP Pressure: 9/13
CPAP Software: ResScan

Other Comments: CPAP since Nov 2010

Sex: Male
Location: Australia

Post: #4
RE: Can someone explain
Basically flow limitation is like having a mini apnea (less than the 10 seconds required for an apnea to be scored)
S9 AutoSet respond to flow limitation by increasing pressure but not during an apnea while the S9 Elite limited to whatever pressure its set

ResScan symbols:
Mountain ......= good
1/2 Mountain = OK
Flat .............= bad
(This post was last modified: 09-04-2012 08:49 PM by zonk.)
09-04-2012 08:35 PM
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greatunclebill Offline

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Posts: 549
Joined: Feb 2012

Machine: Respironics System one Auto A-Flex
Mask Type: Full face mask
Mask Make & Model:
Humidifier: System one
CPAP Pressure: 8-12
CPAP Software: SleepyHead EncoreViewer

Other Comments: quattro fx full face

Sex: Male
Location: L.A. (Lower Alabama)

Post: #5
RE: Can someone explain
FL
Flow Limitation is a partial obstruction of the airway as detected by a change in the shape of the flow signal.
Flow Limitation Detection in Respironics System One..Auto Mode Only scoring only..Straight CPap or Straight BiPap modes does not score this event. The device looks for relative changes in the peak, flatness, roundness, or shape (skewness) of the inspiratory portion of the airflow waveform. These changes are observed both over a short period of time (groups of 4 breaths) and over a long period of time (several minutes). Statistical measures are used to help minimize false event detection while allowing the device to be sensitive to even small changes.

Flow Limitation Index
Changes in flow limitation are recorded as events. The Flow Limitation Index is calculated by the total number of flow limitation events per night divided by the hours of use. Note: The average is calculated by taking the total number of events divided by the number of therapy days. This can be used to indicate if there has been a significant degradation in the flow signal, resulting in a pressure increase. This value is only reported on auto pressure machines.

all terms are explained in the sleepyhead glossary. find it when you open sleepyhead by going to the help browser tab and clicking the Glossary of Sleep Disorder Terms link.

also at http://sourceforge.net/apps/mediawiki/sl...e=Glossary
09-04-2012 08:38 PM
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weeble Offline

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Machine: Resmed AirSense Autoset For Her S10
Mask Type: Nasal mask
Mask Make & Model: Wisp and DreamWear
Humidifier: AirSense
CPAP Pressure: 6-18
CPAP Software: ResScan SleepyHead

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Sex: Female
Location: Gold Coast Australia

Post: #6
RE: Can someone explain
Thanks for the replies - me thinks I may have to dump my elite and get an auto - just a bugger my sleep therapy company only prescribe fixed!
09-04-2012 08:47 PM
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PaulaO2 Offline
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Machine: S9 Autoset
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Location: western NC, USA

Post: #7
RE: Can someone explain
For my current machine, I just had my regular GP write out the script. I didn't do much research ahead of time 'cause I'm an idiot. So a script for a CPAP does not have to come from an expensive sleep doc.

PaulaO2
Apnea Board Moderator
www.ApneaBoard.com


Breathe deeply and count to zen.

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.
09-04-2012 09:11 PM
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zonk Offline

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Posts: 7,908
Joined: Feb 2012

Machine: A10 AutoSet
Mask Type: Nasal mask
Mask Make & Model: Activa LT
Humidifier: Integrated /ClimateLineAir
CPAP Pressure: 9/13
CPAP Software: ResScan

Other Comments: CPAP since Nov 2010

Sex: Male
Location: Australia

Post: #8
RE: Can someone explain
(09-04-2012 08:47 PM)weeble Wrote:  Thanks for the replies - me thinks I may have to dump my elite and get an auto - just a bugger my sleep therapy company only prescribe fixed!
You can get used one from secondwind with or without humidifier
I've noticed flow limitation on my charts when congested
I wouldn't worry about one night but if persists night after night than you can try increase pressure by the smallest increment and see if any difference without compromising sleep quality
09-04-2012 09:14 PM
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