Analyzing the data from my sleep tests

[davehedgehog]

Hey all, I have had two sleep tests, one which was observational, and another with a CPAP. I have just got copies of the reports and printouts and want to do my own analysis. I have an appt. with my doc in a few days and another with the sleep center to set me up with a CPAP, but I want to make sure I understand the details. So, a few questions:

• - The report has a section headed diagnosis that says:
  
  " -Obstructive Sleep Apnea 327.23
  - Periodic Limb Movements of Sleep 327.51"
  
  However, there is no real interpretation of this. What do these numbers represent?
• The sleep efficiency of the first (obervation) test was 85.1%. The second with the CPAP was 94.8% That's a big improvement, but how does that fit into the scale of things?
• The number of arousals on the observation study was 249. On the CPAP one, it was 127. Again, that's an improvement, but could it be better?
• What are the other bits of data in here that I should be researching?

Thanks in advance,

[elena88]

gee, if you can give us more information that would be great..

here are some terms for a sleep study, and below that a sample of an actual sleep study..

Patients estimate of sleep latency is patients estimate of sleep duration
Epworth score is the test they give to see how sleepy you are in daytime

total sleep time: how long you were actually sleeping
stage one sleep is in minutes and a percentage of total sleep time
stage two sleep same
stage three sleep same
Rem minutes same, and most people have their apneas in rem, or the majority of them
WASO (wake time after sleep onset)
sleep latency is how many minutes or hours to get to sleep
Sleep effienciency how long you slept from the time you were ready for sleep

Respirtory events:
Central are clear away events where your brain didnt tell you to breath..
obstructive are just that, tongue dropped back into throat..
mixed are both together
hypopnea is a shallow breath, fifty percent oxygen
total number of events ( added together)
maximum seconds longest time of one event that happened

oximetry data: desaturation events index gives an average of events
lowest SA02 will give lowest percentage that you dropped that night while aslepp
arousal data: total number of arousals
leg movement arousals this will be a number
snoring arousals also a number
arousal index average of how many per hour you had of slight awakenings from one stage of sleep to another
spontaneous arousals the number which happened
respiratory arousals a number of how many you had
respiratory arousal index average of that..

example of sleep study stats:

Patient: *******
Patients estimate of sleep latency 120 minutes, patients estimate of sleep duration 2 hours..
Epworth score: 0
Sleep data:
time in bed 6.1 hrs
total sleep time: 66.5 minutes
stage one sleep 2.0 minutes 3.0%
stage two sleep 60.5 minutes 91%
stage three sleep 4.0 minutes 6%
Rem 0.0 minutes 0.0%
WASO (wake time after sleep onset) 174.5 minutes or 2.9 hours
sleep latency 125.5 minutes or 2.09 hours to get to sleep
Sleep effienciency 18.1 %

Respirtory events:
Central 4, obstructive 28, mixed 0, hypopnea 16
total number of events 48
maximum seconds 29.5

oximetry data: desaturation events index 33.4 lowest SA02 81%
arousal data: total number of arousals 86
leg movement arousals 0.0
snoring arousals 0.0
arousal index 77.6/hr
spontaneous arousals 41
respiratory arousals 45, respiratory arousal index 40. 6 /hr

[OCSleeper]

• - The report has a section headed diagnosis that says:
  
  " -Obstructive Sleep Apnea 327.23
  - Periodic Limb Movements of Sleep 327.51"
  
  However, there is no real interpretation of this. What do these numbers represent?

Looks like you've been given a diagnosis...

A related classification, the International Classification of Diseases, Clinical Modification (ICD-9-CM), is used in assigning codes to diagnoses associated with inpatient, outpatient, and physician office utilization in the U.S. Volume 3 (procedures) is used in assigning codes associated with inpatient procedures. The ICD-9-CM is based on the ICD but provides for additional morbidity detail and is annually updated.
(reference: http://www.cdc.gov/nchs/icd/icd9.htm)

[davehedgehog]

Looks like you've been given a diagnosis...

Ah, I see: the numbers are diagnostic codes for OSH and the leg thing. I thought they were some sort of indication of the degree of the diagnosis.

[davehedgehog]

gee, if you can give us more information that would be great

Okay, from the numbers that you mentioned, here are a few, with the numbers being for the observation/cpap sleep studies

• sleep efficiency: 85.1% / 94.8%
• Obstructive Apnea: 8 / 1
• central apnea 0 / 2
• arousal index 40.4 / 18.2
• Stage N1 7.3% / 5.1%
• Stage N2 76.5% / 68.1
• Stage N3 4.87 % / 5.69%
  Stage R 11.4% / 21.2%

I was also diagnosed with PLMS (Perioidic Limb Movements of Sleep), so any experience with dealing with this would be good to hear about.

[brazospearl]

dave, there's good news/bad news about the PLMS. The bad news is that some of us have real problems with that in addition to apnea, and that can be tricky to manage. The good news is that some of us only have the limb movements if the apnea is untreated or not treated effectively. This means that the movements are part of our gasping/arousal apnea issue, and when we aren't fighting for breath all night the limb movements dissipate. I don't know if there's any way to tell beforehand which group you're in.

[davehedgehog]

Brazospearl, yeah, that pretty much ties in with what I have been reading elsewhere. I don't know where I might fall on that scale, although I suspect that the issues are wider, as I am getting a lot of leg/arm pain during the day as well. I am hoping that it is apnea related and not something else I have to try and deal with...