ASV Question -- Hypopneas vs Apneas

Hi,

(See the information below) I have two questions regarding hypopneas:

1. Is my assumption correct that the ASV scored Hypopneas that would have been CAs or OAs, if the ASV had NOT done its job by "forcing" a breath before a Clear Airway or Obstructive event occurred?

2. Based upon the results and the settings, do you have any advice on pressure settings that might lower the hypopneas?
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I have been on ASV for eight nights.

My current settings are:

Max Pressure: 25.0
Max EPAP: 15.0
Min EPAP: 8.0
Max PS: 15.0
Min PS: 4.0
Bi-Flex: Off
BPM: Auto

(NOTE: My follow-up appointment is a month away. The only adjustment I have made (after the first night) was to change my BPM TO AUTO. That first night I could NOT sync my breathing with the machine. That first night my Patient Triggered Breaths was 58.0. On AUTO it has been in the low to mid-90s.)

The first night Doc's Rx were:
Rate: 11 PBM
Timed Insp: 1.2 seconds
Rise Time: 2
Ramp Time: 5 minutes

Here are the eight night ASV average stats:

AHI: 5.56
HI: 5.17
CA: 0.26
OA: 0.12

Obviously, apneas are great; however, my concern is about the numbers of Hypopneas.

Above I pasted two graphs.

1. The first graph was from last night. I had ZERO Clear Airway and ZERO Obstructive Events, but I had 51 Hypopneas.

2. The second graph was when I was on the S9 Elite straight CPAP. That night I had 85 Central Apneas.

Grand-PAP wrote:Based upon the results and the settings, do you have any advice on pressure settings that might lower the hypopneas?

Try Min PS: 5.0

It's also possible that the Min EPAP is just a shade low. Try 8.5 and/or 9.0. But I would go with the Min PS of 5.0 first. That would tend to keep the airway open when inhaling.

And yes, those hypopneas would have been either CA or OA events. And they would most likely be obstructive. So, increasing the pressure support may help better splint open the airway.

But don't go overboard. If it does not get better, making it higher won't make it better .. and might make the central apnea worse.

Just my two cents worth.

"StillAnotherGuess"

Try Min PS: 5.0

"JohnBFisher"

But I would go with the Min PS of 5.0 first?

Thanks to both for your "two cents worth"!!

Last night I raised the Min PS to 5.0. I realize that one night does not a trend make, but the results were excellent:

AHI: 1.9
HI: 1.6
OA: 0.1
CA: 0.2

I'll stick with these pressures for a couple of weeks to evaluate!

Thanks again!