Post Reply 
[News] Oximetry detects OSA in stroke patients
Author Message
ApneaNews Offline
Apnea News Correspondent
Advisory Members

Posts: 170
Joined: Feb 2012

Machine: IBM Selectric II
Mask Type: Full face mask
Mask Make & Model: 3M N95 (it gets dusty in the newsroom)
Humidifier: Sears Kenmore (circa 1979)
CPAP Pressure: 3200 psi
CPAP Software: Other Software

Other Comments: I report, therefore I am.

Sex: Undisclosed
Location: In the newsroom (where else?)

Post: #1
Oximetry detects OSA in stroke patients
Oximetry detects sleep disorder in stroke patients

By Lucy Piper

Nocturnal oximetry is an accurate instrument for detecting and diagnosing sleep apnea syndrome (SAS) in patients with stroke, research indicates.

This screening instrument may offer physicians a good alternative to polysomnography, the standard diagnostic test, which is often not feasible in stroke rehabilitation settings because it is costly to use, requires technical expertise, and is an added burden for the patient, the researchers comment.

They found that nocturnal oximetry predicted SAS with a sensitivity of 77% and a specificity of 100%.

"Given the high prevalence of SAS in stroke, a positive oximetry result increased the likelihood of SAS to 100%, whereas a negative result lowered the probability to 17%," lead researcher Justine Aaronson (Heliomare Research and Development and Heliomare Rehabilitation Center, the Netherlands) and colleagues report.

The team analyzed sleep recordings obtained for 56 stroke patients. Of these, 46% had SAS diagnosed, predominantly obstructive apneas. The majority (78%) of SAS patients were male and they tended to be older and have a higher body mass index (BMI) than patients without SAS.

At an oxygen desaturation index (ODI) of 15 or above, pulse oximetry predicted SAS with a sensitivity of 77% and a specificity of 100%. Lowering the ODI to 5 or above increased sensitivity to 96%, but the specificity declined to 43%.

The researchers note in Stroke that the clinical variables of age, gender, and BMI all correlated significantly with the apnea-hypopnea index (AHI), but it was scores on the ODI that explained the vast majority of variance in AHI, at 87%.

Indeed, "age, gender, and BMI did not significantly add to the predictive value of oximetry," they report.

"Further validation of oximetry in larger samples is required to determine whether our findings can be generalized to other stroke samples," the team concludes.

fair use from:

The above post may contain copyrighted material the use of which has not always been specifically authorized by the copyright owner. The material available is intended to advance the understanding of Sleep Apnea treatment and to advance the educational level of Sleep Apnea patients with regard to their health. Sometimes included is the full text of articles and documents rather than a simple link because outside links frequently "go bad" or change over time. This constitutes a "fair use" of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material in this post is distributed without fee or payment of any kind for research and educational purposes. If you wish to use copyrighted material from this post for purposes of your own that go beyond "fair use", you must obtain permission from the copyright owner.
07-29-2012 09:38 AM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
Post Reply 

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  [News] Vitamin D - possible help for sleep apnea patients? ApneaNews 46 14,398 10-28-2016 05:01 PM
Last Post: scotty
  Oximetry report Sunshinepostell 3 451 09-09-2016 08:52 PM
Last Post: trish6hundred
  Predicting severity of sleep apnoea with just oximetry? Asjb 12 1,119 06-04-2016 03:34 PM
Last Post: eviltim
  Oximetry report - data interpretation Possum 10 2,125 05-22-2016 11:56 AM
Last Post: kwhenrykerr
  oximetry interpretation guide for sleepyhead sdb7802 2 545 04-22-2016 05:34 PM
Last Post: Possum
  Stroke directly caused by apnea Sleepyabby 23 1,979 03-09-2016 10:59 AM
Last Post: Phill
Exclaimation [News]  Special Safety Notice: ASV therapy for CSA patients with heart failure justMongo 16 4,248 06-07-2015 05:47 AM
Last Post: DocWils

Forum Jump:

Who's Online (Complete List)