Interpretation of ResScan Graph

General Discussion on any topic relating to CPAP and/or Sleep Apnea.
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Breathe Jimbo
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Interpretation of ResScan Graph

Post by Breathe Jimbo » Fri Sep 24, 2010 12:30 pm

I just looked at my first night of full data in ResScan 3.11. Used for 9.03 hours. AHI: 0.8. Central: 0.1. The Events graph shows one Central spike with a 10.0 box. I suspect that means the machine recorded one 10-second pause without obstruction as a Central apnea, and not that I had 10 Central apneas at that point in my sleep. Am I correctly interpreting that spike as meaning 10.0 seconds rather than 10 events?

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rickelia
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Re: Interpretation of ResScan Graph

Post by rickelia » Fri Sep 24, 2010 12:38 pm

I am very new to reading these too but how I read it and please someone correct me if I am wrong but the Red line shows the when the event happened and the number above it in the box shows the pressure you were at when you had the event as it corresponds with how high the red line is on the chart. See Y axis.

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Breathe Jimbo
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Re: Interpretation of ResScan Graph

Post by Breathe Jimbo » Fri Sep 24, 2010 12:42 pm

I'm at a fixed pressure of 13, so I doubt the number in the box [10] means the pressure when the event occurred. My EPR is at 2, so my pressure should never be below 11, and then only after an inhalation. The event occurred substantially after my 10-minute ramp.

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GertJan
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Re: Interpretation of ResScan Graph

Post by GertJan » Fri Sep 24, 2010 12:47 pm

Hi Jimbo,

You are right, the number in the box indicates the duration of the event in seconds.
It is not the pressure.

Gert-Jan

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jdm2857
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Re: Interpretation of ResScan Graph

Post by jdm2857 » Fri Sep 24, 2010 1:16 pm

To be clear, ResScan records each event separately. For apneas, both the height of the bar and the number at the top represent the duration of the apnea in seconds. For hypopneas, only the time of the event (and not the duration) is recorded. Remember, though, that both apneas and hypopneas must last for at least 10 seconds to meet their definitions.
jeff

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Breathe Jimbo
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Re: Interpretation of ResScan Graph

Post by Breathe Jimbo » Fri Sep 24, 2010 2:18 pm

Then I'm very happy having an AHI of 0.8 last night because my AHI was 59.6 during the first phase of my sleep study, before PAP was applied. Such a substantial decrease looks like successful treatment to me! Frankly, the hardest part of all this was getting a machine with full data capability. I wish everyone had the same excellent results; I'm sad to see so many people struggling.

My second night with full data my AHI was 0.5. I hope I continue to have such good results. I still sense a sleep debt, but it appears to be decreasing gradually.

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Last edited by Breathe Jimbo on Sat Sep 25, 2010 1:18 pm, edited 1 time in total.

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kempo
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Re: Interpretation of ResScan Graph

Post by kempo » Fri Sep 24, 2010 2:35 pm

I think ReScan records the event when the event ends. Red column = obstructive, Black column = central, and Yellow column = unknown. The box at the top of the column contains the number of seconds the event lasted.

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rickelia
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Re: Interpretation of ResScan Graph

Post by rickelia » Fri Sep 24, 2010 6:16 pm

Thanks for the correction. After reading where I was wrong I looked over some of my reports and noticed I have alot of events that are clustered around the start and end of my sleep session. Is it possible these are false positives? Talking or situating the mask?

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jlk
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Re: Interpretation of ResScan Graph

Post by jlk » Fri Sep 24, 2010 6:51 pm

Talking seems to show up as a central with my S-9 Auto. I read somewhere that your not supposed to talk with it on, must be why. Nice machine still. Breath Jimbo, you are doing excellent. The fully data capable unit is the only way to go imo. jlk

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jweeks
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Re: Interpretation of ResScan Graph

Post by jweeks » Fri Sep 24, 2010 10:24 pm

rickelia wrote:Thanks for the correction. After reading where I was wrong I looked over some of my reports and noticed I have alot of events that are clustered around the start and end of my sleep session. Is it possible these are false positives? Talking or situating the mask?
Hi,

Events when you start to fall asleep are common. Even people without OSA tend to have a few central events as they are falling asleep. Events at the end of the night are also not uncommon. However, it might be that these events were what woke you up. You might want to check the pressure level graph to make sure that (1) you are not maxing out in pressure when you are in deeper sleep stages, and (2) that your lower pressure level isn't to far below your 95% level. It should typically be only about 2 CM below your 95% pressure level.

-john-