Post Reply 
Sleep Study Results
Author Message
vsheline Offline

Advisory Members

Posts: 1,907
Joined: Jul 2012

Machine: S9 VPAP Adapt (USA Model# 36007, not better 36037 or 36067)
Mask Type: Full face mask
Mask Make & Model: F10 or SimPlus w/ 2Liners. MirageQuatro & Gecko gel pad
Humidifier: H5i
CPAP Pressure: 15 EPAP, PS 5-10
CPAP Software: ResScan

Other Comments: Marfan Syndrome, chronic bradycardia, occasional Cheyne-Stokes Respiration

Sex: Male
Location: California, USA

Post: #11
RE: Sleep Study Results
(11-08-2013 10:22 AM)Philipg33 Wrote:  can you give me a better understanding of RERA's?

Hi Phil,

RERA's are arousals from sleep that do not technically meet the definitions of apneas or hypopneas, but do disrupt sleep. They are abrupt transitions from a deeper stage of sleep to a shallower.

A RERA is characterized by increasing respiratory effort for 10 seconds or more leading to an arousal from sleep, but one that does not fulfill the criteria for a hypopnea or apnea. Therefore RERA's are not counted in the Apnea Hypopnea Index (AHI), which is the sum of the apneas and hypopneas per hour.

Apnea is at least 80% or 90% reduction in airflow lasting at least 10 seconds. (Standards vary.)

Hypopnea is at least 30% or 40% or 50% reduction in airflow lasting at least 10 seconds. (Standards vary.)

RERA's cause arousal but either the reduction in airflow was less than 30% or 40% or 50%, or the duration was less than 10 seconds.

There is an index (number of events per hour) which includes RERA's. It is called the respiratory disturbance index (RDI) — or respiratory distress index. The RDI is the AHI plus the number of RERA's per hour.

Here again is the link to the fantastic article "Flow Limitation/UARS and BiPAP" written by Dr Barry Krakow:
http://www.apneaboard.com/forums/Thread-...rry+krakow

Membership in the Advisory Member group should not be understood as in any way implying medical expertise or qualification for advising Sleep Apnea patients concerning their treatment. The Advisory Member group provides advice and suggestions to Apnea Board administrators and staff on matters concerning Apnea Board operation and administrative policies - not on matters concerning treatment for Sleep Apnea. I think it is now too late to change the name of the group but I think Voting Member group would perhaps have been a more descriptive name for the group.
(This post was last modified: 11-10-2013 02:34 AM by vsheline.)
11-09-2013 12:55 AM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
zonk Offline

Advisory Members

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: #12
RE: Sleep Study Results
From PRS1 manual:
RERA (Respiratory effort-related arousal) is defined as an arousal from sleep that follows a 10 second or longer sequence of breaths that are characterized by increasing respiratory effort, but which does not meet criteria for an apnea or hypopnea. Snoring, though usually associated with this condition need not be present. The RERA algorithm monitors for a sequence of breaths that exhibit both a subtle reduction in airflow and progressive flow limitation. If this breath sequence is terminated by a sudden increase in airflow along with the absence of flow limitation, and the event does not meet the conditions for an apnea or hypopnea, a RERA is indicated.

The manual available via Email (section three)
http://www.apneaboard.com/adjust-cpap-pr...tup-manual
11-09-2013 01:28 AM
Find all posts by this user Post Reply Quote this message in a reply
vsheline Offline

Advisory Members

Posts: 1,907
Joined: Jul 2012

Machine: S9 VPAP Adapt (USA Model# 36007, not better 36037 or 36067)
Mask Type: Full face mask
Mask Make & Model: F10 or SimPlus w/ 2Liners. MirageQuatro & Gecko gel pad
Humidifier: H5i
CPAP Pressure: 15 EPAP, PS 5-10
CPAP Software: ResScan

Other Comments: Marfan Syndrome, chronic bradycardia, occasional Cheyne-Stokes Respiration

Sex: Male
Location: California, USA

Post: #13
RE: Sleep Study Results
(11-09-2013 01:28 AM)zonk Wrote:  From PRS1 manual:
... The RERA algorithm monitors for a sequence of breaths that exhibit both a subtle reduction in airflow and progressive flow limitation. If this breath sequence is terminated by a sudden increase in airflow along with the absence of flow limitation, and the event does not meet the conditions for an apnea or hypopnea, a RERA is indicated.

ResMed bi-level machines currently do not attempt to detect/report RERA's. This is an area in which Philips Respironics machines appear to have detection and reporting which is more advanced than ResMed machines.

Unless electrodes are used to monitor brain waves and muscle effort (like is done during a sleep study), in any RERA detection algorithm there will be some chance that a RERA occurred but was not recognized (a RERA was missed, not reported), and there will be some chance that an unusual breathing pattern may be mistaken for a RERA (a RERA was falsely reported).

The PRS1 algorithm for RERA detection seems very conservative, with a fairly elaborate set of criteria to be met before a RERA is scored. I think the PRS1 algorithm for RERA detection may miss a few RERA's but is quite unlikely to falsely report a RERA event by mistake.

If the PRS1 RERA detection algorithm says a certain number of RERA events occurred, very likely at least that many did occur.

Membership in the Advisory Member group should not be understood as in any way implying medical expertise or qualification for advising Sleep Apnea patients concerning their treatment. The Advisory Member group provides advice and suggestions to Apnea Board administrators and staff on matters concerning Apnea Board operation and administrative policies - not on matters concerning treatment for Sleep Apnea. I think it is now too late to change the name of the group but I think Voting Member group would perhaps have been a more descriptive name for the group.
(This post was last modified: 11-09-2013 03:07 AM by vsheline.)
11-09-2013 02:50 AM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
zonk Offline

Advisory Members

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: #14
RE: Sleep Study Results
Hi vsheline, thank you for clarification
I only wanted to tell Philipg33 about the manual as he got new swanky "System One" machine today
11-09-2013 03:02 AM
Find all posts by this user Post Reply Quote this message in a reply
Philipg33 Offline

Members

Posts: 17
Joined: Oct 2013

Machine: Respironics Remstar Auto System One DS560
Mask Type: Full face mask
Mask Make & Model: Resmed Quattro Air
Humidifier: Attached
CPAP Pressure: 9-10
CPAP Software: Not using software

Other Comments:

Sex: Male
Location:

Post: #15
RE: Sleep Study Results
Thanks guys for further explaining. Much to learn here for sure! I am having problems with the humidifier of this new "swanky" machine. I'll start a new thread on it as someone else may need that in the future.


Thank you again!
11-09-2013 09:59 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
Post Reply 


Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  [Diagnosis] Waiting for sleep study results...got Pulse Ox in the meanwhile jds2001 10 221 Yesterday 03:13 AM
Last Post: kwhenrykerr
  sending sleep study to another doctor's office sleepytimegal 3 203 11-30-2016 10:26 PM
Last Post: Mosquitobait
  Accuracy of Resmed AS10 vs Sleep Study Type IMSleeplessInSeattle 5 411 11-28-2016 12:11 AM
Last Post: sleepytimegal
  Sleep Study: Nasal vs. Full Mask harmon k 2 281 11-20-2016 06:38 PM
Last Post: harmon k
  When is it time to get another sleep study done. duece12345 7 327 11-19-2016 11:51 PM
Last Post: Sleepster
Question First Machine, First Night, First results..Help please? SJGino 9 365 11-18-2016 11:55 PM
Last Post: SJGino
Question [Diagnosis] Sleep Study Report: Lowest Desaturation vs Lowest Saturation blueelement2016 4 245 11-09-2016 02:37 AM
Last Post: blueelement2016

Forum Jump:

Who's Online (Complete List)