Hello Guest, Welcome to Apnea Board !
As a guest, you are limited to certain areas of the board and there are some features you can't use.
To post a message, you must create a free account using a valid email address.

or Create an Account


New Posts   Today's Posts

How long does a sleep study need to be to detect central sleep apnoea
#1
I have had a sleep study done a year ago, I only got 2 hours sleep on my sleep study in which I was diagnosed with obstructive sleep apnoea, with a years worth of CPAP I still feel very tired and my memory is actually declining, my ENT suspects I have central sleep apnoea.

Is 2 hours on a sleep study adequate to rule out central sleep apnoea?
Post Reply Post Reply
#2
Which S9 is your machine? the name printed next to on/off button
The S9 (except S9 Escape and S9 Escape Auto) detect and score central apnea
Post Reply Post Reply
#3
A sleep study will miss a lot of central apnea unless it's a split night study. Some people have central apnea when not under CPAP pressure, but a lot of people only show it when they are under CPAP pressure.

Did they mask you up and try to determine a pressure setting?

In one sense, a sleep study should be done every night for several weeks on everyone to detect central apnea. I think everyone should have a fully data capable CPAP and it should be monitored to detect if you're developing central apnea.

I agree we need to know what CPAP machine you have.
Get the free SleepyHead software here.
Useful links.
Click here for information on the main alternative to CPAP.
If it's midnight and a DME tells you it's dark outside, go and check it yourself.
Post Reply Post Reply


#4
My memory is fading fast, OP uses S9 AutoSet
Please, add the name of the S9 in your profile, so I won't have to repeat the same question
Post Reply Post Reply
#5
(11-18-2015, 01:40 AM)archangle Wrote: A sleep study will miss a lot of central apnea unless it's a split night study. Some people have central apnea when not under CPAP pressure, but a lot of people only show it when they are under CPAP pressure.

Did they mask you up and try to determine a pressure setting?

In one sense, a sleep study should be done every night for several weeks on everyone to detect central apnea. I think everyone should have a fully data capable CPAP and it should be monitored to detect if you're developing central apnea.

I agree we need to know what CPAP machine you have.

I have a Resmed S9 AutoSet with H5i humidifier, on my sleep study I did an overnight study and an MSLT the next day but the odd thing was I got only 2 hours of sleep on my study and the next day I wasn't really tired I just lay down feeling fatigued.

I have played with varying my sleeping hours but nothing works. My Sleep specialist is refusing another sleep study saying that I do not have central sleep apnea but I don't see how they could have ruled that out in only 1 sleep study of 2 hour duration.
Post Reply Post Reply
#6
What does SleepyHead show in terms of central apnea?
Get the free SleepyHead software here.
Useful links.
Click here for information on the main alternative to CPAP.
If it's midnight and a DME tells you it's dark outside, go and check it yourself.
Post Reply Post Reply


#7
Monday 09th - 4 Clear Airway events, 1 hypopnea events
Tuesday 10th - 5 Clear Airway events, 2 hypopnea events
Wednesday 11th - 4 Clear Airway events, 2 hypopnea events
Thursday 12th - 9 Clear Airway events, 2 hypopnea events
Friday 13th - 8 Clear Airway events, 1 hypopnea events
Saturday 14th - 10 Clear Airway events, 2 hypopnea events
Sunday 15th - 1 Clear Airway event, 0 hypopnea events
Post Reply Post Reply
#8
Is that significant?
Post Reply Post Reply
#9
(11-18-2015, 12:12 PM)napnaptime Wrote: Monday 09th - 4 Clear Airway events, 1 hypopnea events
Tuesday 10th - 5 Clear Airway events, 2 hypopnea events
Wednesday 11th - 4 Clear Airway events, 2 hypopnea events
Thursday 12th - 9 Clear Airway events, 2 hypopnea events
Friday 13th - 8 Clear Airway events, 1 hypopnea events
Saturday 14th - 10 Clear Airway events, 2 hypopnea events
Sunday 15th - 1 Clear Airway event, 0 hypopnea events

Total events or events per hour.

Doesn't sound too bad if it's per hour, but look at your flow rate waveforms and see how long the individual events are.
Get the free SleepyHead software here.
Useful links.
Click here for information on the main alternative to CPAP.
If it's midnight and a DME tells you it's dark outside, go and check it yourself.
Post Reply Post Reply


#10
(11-21-2015, 03:31 PM)archangle Wrote:
(11-18-2015, 12:12 PM)napnaptime Wrote: Monday 09th - 4 Clear Airway events, 1 hypopnea events
Tuesday 10th - 5 Clear Airway events, 2 hypopnea events
Wednesday 11th - 4 Clear Airway events, 2 hypopnea events
Thursday 12th - 9 Clear Airway events, 2 hypopnea events
Friday 13th - 8 Clear Airway events, 1 hypopnea events
Saturday 14th - 10 Clear Airway events, 2 hypopnea events
Sunday 15th - 1 Clear Airway event, 0 hypopnea events

Total events or events per hour.

Doesn't sound too bad if it's per hour, but look at your flow rate waveforms and see how long the individual events are.

I don't know how to read this stuff I can barely read a page of a book my cognition is so messed up.
Post Reply Post Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
Ohmy Hypopnea, central and obstructive Stevie1under 10 224 7 hours ago
Last Post: Mark71
  New to Board not to Sleep Apnea Dr Bobs Patient 6 320 Today, 12:18 AM
Last Post: DrmWEaver
  Need advise on maintaining proper Sleep posture Sterling147 5 193 03-21-2017, 03:20 PM
Last Post: Hydrangea
  Cpap Mask left wrinkle lines in my face. How long doe they take to go away? Ihaveapnea 4 269 03-21-2017, 04:42 AM
Last Post: cant_sleep_in_nj
  Still sleepy after 9 months. Could only sleep for 6 hours. susilosaja 11 267 03-21-2017, 03:25 AM
Last Post: susilosaja
Sad [CPAP] My Sleep Apnea Story and CPAP Issue ihatesleepapnea2017 8 212 03-17-2017, 07:14 PM
Last Post: trish6hundred
  DOT and sleep tests angilar77 9 236 03-16-2017, 10:31 PM
Last Post: trish6hundred

Forum Jump:

New Posts   Today's Posts




About Apnea Board

Apnea Board is an educational web site designed to empower Sleep Apnea patients.

For any more information, please use our contact form.