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Permalink Reply by Andy on November 12, 2009 at 8:28pm

Hi Jan,

Funny you should ask... I just got a copy of all of my stats so far. "So far" being a little over three weeks.

I'm on a CPAP with fixed pressure of 8.

My AI is pretty much under 1.0, with 4 nights over 1.0.

My HI ranges from 4.5 to 9.1.

My AHI ranges from 5.3 to 10.5

My lowest usage in a night was 4 hours, 13 minutes, and my best night was 8 hours and 18 minutes. That's pretty remarkable, considering pre-CPAP I was only "sleeping" about 4 hours per night.

I just calculated the averages in Excel (Nerd Alert!)

Usage; 6:48 hours
AI: 0.87
HI: 6.56
AHI: 7.43

Not sure what all of this means, but I hope it helps!

;)

.

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Permalink Reply by Andy on November 12, 2009 at 8:32pm

Oh, in answer to my own question...

Rock had posted this reference:

AHI is the total number of apneas plus the total number of hypopneas divided by the total number of hours slept:

AHI 0-4=healthy
AHI 5-15=mild
AHI 16-29=moderate
AHI 30+= Severe

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Permalink Reply by dave foster on November 12, 2009 at 8:57pm

Before cpap i was at 60 AHI, after cpap 4AHI, so i guess ive made progress

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Permalink Reply by dave foster on November 12, 2009 at 8:59pm

PS the doc said my sleep apnea was extreem, on a scale of 1-10 i was a 9 or 9 1/2. not good at all

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Permalink Reply by Mary Z on November 14, 2009 at 5:11pm

Hi Jan,
My AHI and AI are all over the place. On the 12th AHI 9.3, AI 3.2,last night AHI 15.6, AI 7.7. I started BiPap less than a month ago and am still getting the pressure titrated.
Good luck, keep us posted on how you're doing.

Mary Zimlich

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Permalink Reply by Brian Arnold on November 25, 2009 at 11:14am

I would suspect it's different per person.

My doc really knocked it out of the park in getting things right first try, it seems.

Three months ago, when I had my first sleepy study, I clocked in AHI of 122. I got put on a pretty nice machine (See http://www.sleepguide.com/forum/topics/pr-system-one-auto-cpap for the machine I have) with pressure between 13 and 18. First night stats on the machine had me down to an AHI of about 7, which steadly and fairly rapidly decreased.

I don't have any detailed reports for specifically per-night, but I can get a 7-day and 30-day average from it, and for those, I'm currently showing 1.5 and 1.8 respectively, with very little variance. I haven't seen a number over 2 there in over a month.

That being said, I'm sure there's some variation, because sometimes the average is down at like 1.2 and other times jumps to 1.8, which I'd say means I'm probably oscillating between 1-3 AHI each night.

My pressure averages out at about 14.5, just as something else to note.

I'm still very much a newbie (and relatively inactive on forums), but I figured I'd jump in here with my recent stats.

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Permalink Reply by Juan Beer on November 25, 2009 at 11:21am

I am fairly new to this (Bipap for about three weeks).

None of these abbreviations mean anything to me. They were never discussed by my doctor, technician, nor were they included in the literature provided with my machine,

I cannot imagine how to retrieve any such information. I know there is a short term card in the machine to administer my prescription and provide the supplying company with feedback on usage and results, but I don't know how to read it. I doubt that it is meant to provide this information to the user as it is to be returned after a month or two with no replacement to be expected.

Am I missing something important here?

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Permalink Reply by Carolyn on November 25, 2009 at 11:23am

How do I find out this information? I just got the ResMed S8 AutoSet II. Is it Data capable for me?

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Permalink Reply by Pamela Simmons on November 25, 2009 at 11:27am

I have been on cpap for going on two years and have no clue what any of that is about..........my doctor has said nothing to me about this. I would love to be informed on my stats.

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Permalink Reply by RockRpsgt on November 25, 2009 at 11:42am

AI is your apnea index which is the number of apneas per hour of sleep
HI is your hypopnea index which is the number of hypopneas per hour of sleep.
AHI is apnea+hypopnea index. This is how many apneas and hypopneas you have per hour of sleep.
RDI is the total number of respiratory events per hour of sleep. This would include RERAs, hypopneas, and apneas.

Your daily AHI/RDI is likely to jump around as it is a one night snap shot of your sleep. Once your optimal pressure is found even though your daily numbers might fluctuate your average or mean RDI/AHI should stay pretty much the same. There are quite a few things that will effect your nightly numbers including colds, humidity levels, congestion, bed partner, pets,stress, anxiety, medications or sleep hygeine

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Permalink Reply by Peter Hollard on November 25, 2009 at 12:01pm

Hey Jan

I have been on an APAP machine for three months now and my apnea is much improved.. my AHI was 23 before this, my blood count was all over the place and I was going to sleep at the wheel while driving in the afternoon.

Titration suggested a pressure setting of 11.8 however by trial and error I have found that a range between 9-12 is most effective. My AHI after bouncing about a bit is now pretty stable at 4-4.5 . My usage is on average 5 hours a night. My blood count has returned to normal and I no longer feel drowsy in the afternoon. It truly is a dramatic improvement in the quality of my life.

Hang in there this is really very effective therapy...

Cheers

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Permalink Reply by Andy on November 25, 2009 at 12:27pm

Hi Carolyn,

Here's what I do on my ResMed S8 AutoSet II in order to read my results:

There are four buttons just under the LCD screen. These are called Left, Right, Up, and Down.

To enter the patient data menu, press and hold both the Left and Right buttons for at least three seconds, until the display reads REVIEW.

Press the Left button to enter the REVIEW menu
Press the Down button until RESULTS is displayed
Press the Left button to enter the RESULTS menu
Press the Left button to enter the EFFICACY menu
Press Down to display LEAK results
Press Down to display AHI results
Press Down to display AI results
Press Down to display HI results
Press Right to exit the EFFICACY DATA menu
Press Right to exit the RESULTS menu
Press Right to exit the REVIEW menu

This procedure enables you to read all of your results, but it does not allow you to make any changes. so, you should be able to read the results without worrying about messing anything up.

Hope this helps!

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