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→Fancy Stuff: Other Data Available from SleepyHead
= Fancy Stuff: Other Data Available from SleepyHead =
UNDER CONSTRUCTION
TV, MV, and others. Also stuff for ASV users---Patient Triggered breaths, mask pressure etc. Also any other machine specific data that I know about: PB on Resmeds; SensAwake stuff for Icons; Expiratory Puffs (for either Icons or Intellipaps)
This is UNDER CONSTRUCTION and a very, very rough first draft of the material that will eventually be here.
Minute Ventilation is the total amount of air you breath in (or breath out) over the course of one minute. Unless you have a chronic ''daytime breathing problem'' like asthma or COPD, you can assume that these numbers are ok. They vary from person to person (based on size) and during solid sleep they are typically lower than when you're awake. I don't tend to look at these numbers much, except as a curiosity.
'''Respiratory Rate.'''
These are the numbers for your respiratory rate-- i.e. how many times you breathe each minute. Again, they're going to vary from person to person. I'm not sure why the min is so low here; it may be that during some part of the night there were some long apneas or several apneas close enough together to bring this down. If you've got copies of your sleep test you can compare the W-Avg, median, and 95% numbers to the respiratory rate on the sleep test if you want. Again, RR varies from person to person. For many people the RR goes down somewhat in solid sleep; for others it goes up.
Some people claim they can use the information from the RR graph and the minute ventilation graph or the tidal volume graph to distinguish possible REM cycles and possible arousals. Personally, I'm skeptical of such claims and don't think that I can pinpoint such things in my own data from these graphs
'''Inspiratory:Expiratory (ratio)'''
PR machines do not display this. Mathematically these numbers seem to be the Inspiratory Time in seconds divided by the Expiratory time in seconds, but I think this is actually being repored as a "percent" In other words, I think these numbers are actually computed as:
: [(Inspiratory Time in seconds)/(expiratory Time in seconds)] * 100%
[FIX THIS IT MAKES NO SENSE OUT OF CONTEXT OF THE ORIGINAL POST THIS WAS PULLED FROM] And in that case the meaning of the weighted average is that the length of your average inhalation is about 40% of the length of your average exhalation. In other words, the fact that all of these numbers are less than 100 means that your inhalations are shorter than your exhalations.
I have no idea if there is any clinical significance to this number or not. I suspect that for most of us, it's not a very useful number to worry about.
'''Insp TimeInspiratory Time (seconds)'''
These are the numbers for the lengths of your individual inhalations. Is there any clinical significance to the length of the inhalations? Not that I know of---if you don't have some kind of a daytime breathing problem as well as sleep apnea
'''Exp TimeExpiratory Time (seconds)'''
These are the numbers for the lengths of your individual exhalations. Is there any clinical significance to the length of the exhalations? Not that I know of---if you don't have some kind of a daytime breathing problem as well as sleep apnea
'''Tidal VolumeTidal Volume (ml)'''
ADD SOMETHING ABOUT TYPICAL AVERAGE TV NUMBERS?
Tidal volume is how much air you breath in during one inhalation. It's measured in mL and there are 1000 mL in one L. That's why these numbers are so much "bigger" looking than the minute ventilation numbers, which are measured in L/min.
The Tidal volume and the Minute Ventilation are related to each other:
: Minute Ventilation in L/min = (Tidal volume in mL/1000) * (Respiratory rate in breaths per minute)
Tidal volume is of great importance for people who are using an ASV machine since Tidal Volumes are used by the machine to figure out when to trigger inhalations. But for the rest of us? Tidal volume doesn't really have much significance if we don't have a daytime breathing problem.
Like Minute Ventilation and RR, the Tidal volume varies from person to person. And when we're asleep, our tidal volume typically is less than when we're awake. For now you can pretty much ignore the Tidal volume numbers.<br />
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