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General Discussion on any topic relating to CPAP and/or Sleep Apnea.
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APN/HYP Index?

Postby Mtnman on Sat Jul 21, 2007 7:00 am

Hi all,

What is the APN/HYP Index reading I get on my APAP A-Flex? What is the range of readings, low to high?

I had my first night with my new machine and I'd say it went great! I breathed comfortably and my wife said I didn't snore AT ALL. That's big for her. I woke up earlier than I wanted to but I think it was because I was excited to get up and see how I felt. And I feel pretty darn good.

This machine is almost totally silent and the Nasalair II mask felt great. I didn't use the head straps, just the one velcro strap in back. I think I may find something to secure the hoses a little tighter behind my head though. Maybe a rubber band. I think the mask will fit even better if it his held more securely behind my head.

I'm almost anxious to get to tonight and try it again!




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Postby amos on Sat Jul 21, 2007 7:25 am

The apn/hyp or apnea/hypopnea index (AHI) is the average number of apnea and hypopnea events that you are having per hour. Anything under five is considered good.

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Postby darthlucy on Sat Jul 21, 2007 7:28 am

It's awesome that you had such a great night! If your total AHI is 5 or less, you're doing fantastic. AHI is a combination of AI (apneas) and HI (hypopneas). According to the clinician manual that I got for my S8 Elite, the primary difference between AI and HI is how much decrease in ventilation is present. If the decrease in ventilation is greater than 75%, the machine classifies the event as an apnea. If the decrease is 50% to 75%, it is classified as a hypopnea. So apneas are worse than hypopneas. I don't know what level of information your machine provides, but if you get AI's and HI's, you're better off if a larger portion of your AHI comes from HI's.

By way of example, I typically get an AHI of about 2.6. My AI is almost always 0, and the entire 2.6 is usually in HI's. I consider that a really good result!

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Got it!

Postby Mtnman on Sat Jul 21, 2007 7:30 am

Thanks for the help. My Indes was 3 so based on what I'm learning here, that good!

Thanks again...


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Postby Babette on Sat Jul 21, 2007 8:11 am

Great news your first night was so good! Once I started having good sleep with the NAII, I too would wake up earlier than I wanted to. All frisky and rarin' to go. Actually kind of annoying. Waking up at 5 am I could kinda deal with. But slowly it's pushing it's way back to 4 am, 3 am, 2 am... This past week I've been a bit better, but the week before - the 2 am "friskies" as I put it were KILLING ME! I'd have to get up, do stuff, EAT... grr...!!!


Mask: Nasal Aire II Prong CPAP Mask with Headgear
Humidifier: PR System One 60 Series Heated Tube Humidifier with Heated Tube
Additional Comments: Started XPAP 04/20/07. APAP currently wide open 10-20. Consistent AHI 2.1. No flex. HH 3. Deluxe Chinstrap.
I currently have a stash of Nasal Aire II cannulas in Small or Extra Small. Please PM me if you would like them. I'm interested in bartering for something strange and wonderful that I don't currently own. Or a Large size NAII cannula. :)

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Postby Bamalady on Sat Jul 21, 2007 10:29 am

It sounds as if you have your equipment tweaked pretty well! Good for you. If you run into problems, let us know.

Mask: Mirage Activa™ Nasal CPAP Mask with Headgear
Additional Comments: A-Flex, not C-Flex

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Postby Guest on Sat Jul 21, 2007 12:02 pm

Thanks Bamalady. Your advice worked perfectly. My machine is all set up!


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