HI is high..why?

Jim Bassett · Post by **Jim Bassett** » Wed Feb 07, 2007 6:30 am

6 weeks now on apap snd my numbers are:

Pressure 12.2
Leaks .02 L/S

AHI 13.2
AI .3
HI 12.9

Hours 6

Why is my HI so high and what can I do to bring this down?
Not sure I understand what HI is and its effect on my sleep.

Thanks gang....I appreciate all the info acquired in this forum.

cflame1 · Post by **cflame1** » Wed Feb 07, 2007 6:32 am

What's your pressure settings?

Any other conditions?

Jim Bassett · Post by **Jim Bassett** » Wed Feb 07, 2007 6:37 am

apap press is set to 8 and 14. Both settling times are OFF I am using a Soyala nasal mask as I do not mouth breathe.

oldgearhead · Post by **oldgearhead** » Wed Feb 07, 2007 6:44 am

I would try Min 10, Max 14, if your titrated pressure is within that pressure
band..

sleepyWI · Post by **sleepyWI** » Wed Feb 07, 2007 6:46 am

I found by titrating myself at a series of constant pressures that my AI and HI responded a little differently to changes in pressure and i had to find a pressure to minimize both. Some on here feel the HI's are not very important but for me they were the difference between no sleep and good sleep.

jimbassett · Post by **jimbassett** » Wed Feb 07, 2007 7:21 am

OK Now I'm logged back in with the right name spelling....sheesh!

My titrated pressure was 9.5 I had very little OSA at that time. My apap
was originally set to 7 and 18. On advice from others I reduced the high end
to 14 and eventually moved the low end to 8 So now it is 8 and 14. Even thru
all of this my pressure stayed from 10.6 to 12.4 and the AHI's were all pretty much the same. I have never mouth breathed, don't snore, and have reasonably good air passage
thru my nose. I only had one Central Apnea at the titration study and I slept for 6 hrs.
that night. I just don't understand this constant high HI reading. Thanks Jim

bdp522 · Post by **bdp522** » Wed Feb 07, 2007 7:46 am

I didn't do well on apap. I set my machine on cpap and do much better. Have you tried setting the machine at 9.5 as cpap? Might be worth a try.

Brenda

Wulfman · Post by **Wulfman** » Wed Feb 07, 2007 9:27 am

bdp522 wrote:I didn't do well on apap. I set my machine on cpap and do much better. Have you tried setting the machine at 9.5 as cpap? Might be worth a try.

Brenda

This would be my suggestion, too.

Den

jimbassett · Post by **jimbassett** » Wed Feb 07, 2007 5:13 pm

OK I have it changed over to CPAP and will try that tonight @ 9.0 pressure. I don't like the ramp so turned it off. Thanks All

Slinky · Post by **Slinky** » Wed Feb 07, 2007 5:32 pm

Another thought: could it be that altho you are not mouth breathing, during the night your air pressure builds enough in your mouth to cause an "escape" of air thru your lips? Just one little crack causing a flutter of air to escape?

You could try some PoliGrip on your lips for a couple of nights and see if that makes any difference. Just make one change at a time, whatever that change is, and stay w/that change for at least 3 days, better yet a week.

CollegeGirl · Post by **CollegeGirl** » Wed Feb 07, 2007 6:29 pm

If trying straight CPAP does not improve things for you, there are two things I would be looking at, if I were in your shoes:

1) GERD. Do you have GERD? If you don't think you have it, please note that it can be silent. Get your doc to check it out. Essentially, when there's too much damage from acid, the soft tissue is scarred and hardened, and it's more difficult for CPAP to push this tissue aside.

2) Centrals. If you're one of the rare people that have centrals induced by pressure changes in the auto, the straight cpap should help, anyway. But if you're having other kinds of centrals, it won't, and your AHI will still be high. Though I'm sure your AHI is lower than it was, you're still not close to "normal" range. I'd definitely be going back to the doctor if none of these solutions seem to work.

GoofyUT · Post by **GoofyUT** » Wed Feb 07, 2007 7:54 pm

Relax! You're obviously using a ResMed APAP, since ResMeds report leak in L/s, whereas Respironics reports in L/min.

ResMeds are notorious for aggressively scoring hypopneas. And, if you DO NOT have "settling" enabled for a period of time long enough to typically allow you to fall asleep, then it will artifactually score normal variations in your non-autonomic (wakeful) breathing as you are settling down into sleep as hypopneas. Many of us were astonished as we watched our ResMeds actually increasing pressure aggressively as we were laying there AWAKE!

Unless you know that those hypopneas that your ResMed is scoring are CLINICALLY significant, that is, accompanied by significant oxygen desaturations, I wouldn't worry about the high HI, if it were me. With ResMeds, high HIs are often artifacts that are NOT clincially significant. Just my opinion tho.

Hope this helps.

Chuck

pedroski · Post by **pedroski** » Wed Feb 07, 2007 8:04 pm

Hi Jim,

Chuck's right. I also have a Resmed and was worried about hypops being high - I average 6.7 AHI and 6.6 of it is HI, and everyone said we're supposed to get AHI below 5. But the guys here have reassured me that it's a feature of the Resmed that they score hypops higher than the other flow generators. The AI is much more important.

That's one great feature of this forum. I'm much more relaxed since learning that. Hypops are shallow breathing. The main criterion is how you feel during the day. If you feel like crap then chase it down, but if you're feeling good, I'd do like Chuck said and relax.

Peter

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HI is high..why?

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