need help figuring out rdi/ahi from silverlining software.

seagull · Post by **seagull** » Sat Aug 20, 2005 2:38 pm

Howdy, I think I read earlier posts that said you have to figure out the rdi/ahi figures on silverlining. If so, could someone tell me how to do it. I see the apnea/hypopnea numbers. Am I just missing the bottom line?
Thanks.
Also did you read in back of manual that the 420e considers hypopneas to be a 60 percent drop in breathing vs. 30-50 percent that I have read is typical. I thought that was interesting. At least I think that is what it was saying. I could be wrong.

TXKajun · Post by **TXKajun** » Sat Aug 20, 2005 5:10 pm

seagull, what I do is look at the first page that comes up when I download my data. The right side of the screen, the right hand column has all the apnea, hypopnea, etc information, including an index of them in the far right hand column. I simply add up the numbers from the apnea and hypopnea indexes and consider that my ahi.

Hope that helps (and that it's right!!)

This therapy WORKS!!!

WillSucceed · Post by **WillSucceed** » Sun Aug 21, 2005 12:48 pm

I add the apnea, apnea /CA and the hypopnea numbers. An average night of these for me is less than 1.0 per hour.

You might try looking at the graphical data. You will notice that where an apnea and an apnea /CA occur at the exact same time, the machine does not count this as 2 events, only one.

Sleepless on LI · Post by **Sleepless on LI** » Sun Aug 21, 2005 3:27 pm

I add the apnea, apnea /CA and the hypopnea numbers. An average night of these for me is less than 1.0 per hour.

I'm not on the Silverlining software (Encorepro I have) but I know it's important, after adding up your OAI and your HI, to divide by the number of hours your slept. If you had 7 events total and slept for 7 hours, your would have an AHI of 1. But if you have a total of 7 and slept for 2 hours, then your AHI would be 3.5. Don't forget to divide by the number of hours you actually slept. It would make a big difference.

By the way, WAY TO GO, WillSucceed. Glad to hear your AHI is so low.

ozij · Post by **ozij** » Sun Aug 21, 2005 10:15 pm

In SL3, the program does the dividing for you - and gives you the the number of events and right next to it, the Index/h, which means the number of events per hour. No need do divide one again.

An AHI is an Apnea Hypopneas Index[/] - the total of Apneas + the total of hypopneas divided by the total time you've slept, which give the average number of events per hour.

O.