SleepyHead data questions

(1) Is there some place that gives a total of the flags in the event graph? How many of each, individual durations, and total times? I can mouse over and see, but sometimes there are clusters (very thick line on graph) that are too close together for the mouse to separate.

(2) What is the Flow Limitations graph trying to tell me?

(3) Last night I had a cluster of CA occur; as I look down the graphs, I've got huge spikes in Resp. Rate, Tidal Volume, Insp. Time, Exp. Time, and the leading edge of my largest AHI plateau. It's also right about the time I'm starting to wake up. In general, how can I make use of correlations like this? (I gather that in this specific case, my waking up caused my breathing to transition form sleep-autopilot to awake-manual control, and the hand-off got bobbled around a bit. Or maybe I was rolling over prior to coming out of the fog.) So maybe there's nothing of import to this specific instance - but is there anything in general I can look for and maybe take back to my doctor?

(4) In the overview graphs, what do the different shades on the daily columns mean? Is there a way to get a detail for each different shading?

Ed

EdNerd wrote:(1) Is there some place that gives a total of the flags in the event graph? How many of each, individual durations, and total times? I can mouse over and see, but sometimes there are clusters (very thick line on graph) that are too close together for the mouse to separate.

zoom in. though some people like the events tab.

EdNerd wrote:(2) What is the Flow Limitations graph trying to tell me?

how bad your flow limitations were.

EdNerd wrote:(3) Last night I had a cluster of CA occur; as I look down the graphs, I've got huge spikes in Resp. Rate, Tidal Volume, Insp. Time, Exp. Time, and the leading edge of my largest AHI plateau. It's also right about the time I'm starting to wake up. In general, how can I make use of correlations like this? (I gather that in this specific case, my waking up caused my breathing to transition form sleep-autopilot to awake-manual control, and the hand-off got bobbled around a bit. Or maybe I was rolling over prior to coming out of the fog.) So maybe there's nothing of import to this specific instance - but is there anything in general I can look for and maybe take back to my doctor?

beats me.

EdNerd wrote:(4) In the overview graphs, what do the different shades on the daily columns mean? Is there a way to get a detail for each different shading?

the legends should be on each chart.

EdNerd wrote:Is there some place that gives a total of the flags in the event graph?

Events tab...right next to the "details" tab and under the different AHI bar graphs on the left.

(1) Found it!! Thanks.

(2) What is the Flow Limitations graph trying to tell me?

how bad your flow limitations were.

Ummm .... okay. What are "flow limitations"? If I see something here, am I looking for an obstruction in the mask or hose - some reason why the flow of air isn't getting from the machine to me? Or does "flow limitation" mean something else entirely?

(3) Beats me too. :8>)

(4) I'm looking at the AHI graph in the Overview tab. There is a title on the graph, and there is a string of data on top of the graph. But there's nothing that I can immediately see that correlates any certain data to a shade of color on a daily data column. Some columns have two shades, some have three. No clue what the different shades represent.

Ed

See how many of your questions are answered here
http://www.apneaboard.com/wiki/index.ph ... SleepyHead

For definitions or "what does this mean" check out the glossary.. Flow limitation definition is included.
http://sleepyhead.sourceforge.net/wiki/ ... p/Glossary

For "flow limitation" stuff...use the forum search function and pay special attention to posts made by forum member Jay Aitchsee or go read some of his posts.

We are never really told how to interpret the flow limitation graph from ResMed machines.
ResMed only briefly touches on it in their ResScan software explanations.
http://www.apneaboard.com/ResScan_Inter ... -Guide.pdf
Mainly we just say the more active or stuff you see...the worse it is.

Here's an example of a flow limitation graph that shows essentially no flow limitations to speak of.

EdNerd wrote:Ummm .... okay. What are "flow limitations"? If I see something here, am I looking for an obstruction in the mask or hose - some reason why the flow of air isn't getting from the machine to me? Or does "flow limitation" mean something else entirely?

something else entirely, watch this: https://www.youtube.com/watch?v=-gie2dhqP2c

EdNerd wrote:(4) I'm looking at the AHI graph in the Overview tab. There is a title on the graph, and there is a string of data on top of the graph. But there's nothing that I can immediately see that correlates any certain data to a shade of color on a daily data column. Some columns have two shades, some have three. No clue what the different shades represent.

ah, right, sorry, my bad, I forgot the programmer didn't have the sense to do that.

if you hover your mouse pointer over one of the bars on the chart, you'll get a popup and it'll list the numbers in that column, and can figure out which color corresponds to which number that way.

Pugsy wrote:We are never really told how to interpret the flow limitation graph from ResMed machines.
ResMed only briefly touches on it in their ResScan software explanations.
http://www.apneaboard.com/ResScan_Inter ... -Guide.pdf
Mainly we just say the more active or stuff you see...the worse it is.

Here's an example of a flow limitation graph that shows essentially no flow limitations to speak of.

the numbers on sleepyhead are just arbitrary, a result of the graphing engine the program uses...

basically it's 'nothing' at the bottom, to 'bad' at the top. (for Ed's benefit). and the more 'bad' it is, the more an auto machine would ramp up the pressure to stop them.

From looking at my own data, it appears that ResMed machines in the Auto mode increase the pressure when Flow Limitations reach the .05 SleepyHead mark. My own personal interpretation is that this can be thought of as a percentage, where .05 represents 5% reduction toward some value that ResMed considers a 100% Flow Limitation, i.e., 1.0. or, the amount of "flattening" of the Flow Wave that has occurred where 1.0 would be perfectly flat. Probably not the case, but a way to think about it.
In any event, since the machines seem to react at 0.05, it seems reasonable that this would be a number to strive to stay below.

Many thanks for the answers. The wiki really helps -- lots to dig through to help understand this stuff.

Ed