Hello Guest, Welcome to Apnea Board !
As a guest, you are limited to certain areas of the board and there are some features you can't use.
To post a message, you must create a free account using a valid email address.

or Create an Account

New Posts   Today's Posts

[Diagnosis] Sleep Study Report: Lowest Desaturation vs Lowest Saturation

First, thanks for this great forum. I have been reading many posts and learned so much over the past couple weeks.

I received my home sleep study data report today. I think it is the default printout from the ResMed ApneaLink. It is branded ResMed in the upper right of the page.

I am confused about this section:

ODI Oxygen Desaturation Index: 15.1 (normal <5/h)
Average saturation: 95 (normal 94-98%)
Lowest desaturation: 84 (normal column is blank)
Lowest saturation: 71 (normal 90%-98%)
Baseline Saturation: 98%

Can anyone help me understand this information?

I am really confused as to the difference between "lowest desaturation" and "lowest saturation."

The above data means my blood oxygen level reached a low point of 71% is that correct? I am not sure what the 84% means.

Also if anyone knows of a thread or link that has more detailed information about each of the ResMed ApneaLink results categories I would definitely be interested in reading it. However this was my most burning question and the one I wanted to start with.

Thank you!

Post Reply Post Reply
This is in PubMed, so should be somewhat reliable:

I tried using Google for the phrase "lowest desaturation" and found a number of references, some in medical speak and some in English. Give it a try.

The normal range seems to be 95-100%.
Please organize your SleeyHead screenshots like this.
I'm an epidemiologist, not a medical provider. 
Post Reply Post Reply
Hi blueelement2016,
WELCOME! to the forum.!
Hang in there for more answers to your questions, good luck to you with your CPAP therapy.

Post Reply Post Reply

I have never seen the term "lowest saturation", I have no idea what that is. The rest appears to say that you have 15.1 desaturation events per hour, with a low of 84% and an average over the night of 95% (normal). 84% is not incredibly bad, but it is not healthy either.
Post Reply Post Reply
Thank you all!

Post Reply Post Reply

Possibly Related Threads...
Thread Author Replies Views Last Post
  BPAP Titration Sleep Study HalfAsleep 143 3,305 Yesterday, 11:57 AM
Last Post: HalfAsleep
Question [Diagnosis] What Was Your Sleep Study AHI? Sheepish 24 727 01-08-2018, 05:55 PM
Last Post: PollCat
  Finally got a copy of sleep study Josephdfco 14 473 01-01-2018, 06:51 AM
Last Post: Apnea Infant
Gross [Diagnosis] Sleep study results bugo 2 168 12-26-2017, 05:36 PM
Last Post: Sleeprider
  Hi! I have a CPAP machine, but do I need it? Sleep study attached Grazi 14 687 12-17-2017, 07:59 PM
Last Post: Sleep2Snore
  Normal or NOT my report numbers I am at a lost Lise C Gervais 17 575 12-12-2017, 11:27 PM
Last Post: Shin Ryoku
  How do I fix my report, for dot physical? Tslade1co 5 318 12-07-2017, 11:48 PM
Last Post: DeepBreathing

Forum Jump:

New Posts   Today's Posts

About Apnea Board

Apnea Board is an educational web site designed to empower Sleep Apnea patients.

For any more information, please use our contact form.