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Doctor insights on: Ambulatory Polysomnography Test

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Are all polysomnography testings overnight?

Are all polysomnography testings overnight?

Not necessarily : Typically psgs are overnight as most people sleep at night. However most sleep centers will perform daytime psgs to accommodate shift workers. Multiple sleep latency tests are somewhat similar to psgs and are usually done during th daytime to evaluate possible narcolepsy and idiopathic hypersomnia. Maintenance of wakefulness tests are done during the day as well. ...Read more

Polysomnography (Definition)

Polysomnography is a sleep study. A sleep study monitors you as you sleep, or try to sleep. One of the popular disorders it assesses ...Read more


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How accurate are polysomnography exams?

How accurate are polysomnography exams?

Not perfect: There are no medical tests that are perfect. That means that the are sensitive enough to diagnose everyone with the condition for which the test is being done and they are specific enough to rule out a diagnosis if the test is negative. Having said that there are different types of sleep studies and they are quite good tests and greater than 90% sensitive. ...Read more

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Dr. Jeffrey Ng Dr. Ng
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What is the definition or description of: polysomnography?

Dr. Jeffrey Ng Dr. Ng
1 doctor agreed:
What is the definition or description of: polysomnography?

Sleep Study: Polysomnography is a sleep study. A sleep study monitors you as you sleep, or try to sleep. One of the popular disorders it assesses for is sleep apnea. ...Read more

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What is the age limit for having a polysomnography?

What is the age limit for having a polysomnography?

No age limit: There is no age limit for a sleep study that i've ever heard of. Anyone with excessive daytime sleepiness or with witnessed cessation of breathing while sleeping should have a sleep study. If abnormal, they would likely benefit from good sleeping habits, loss of weight if overweight and cpap. ...Read more

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I had polysomnography. Please explain: increased spindle densities seen throughout record.(I don't take benzodiazepines). ?

I had polysomnography.  Please explain: increased spindle densities seen throughout record.(I don't take benzodiazepines). ?

Sleep spindles: Increased sleep spindles may be associated with effective stage 2 sleep, if there is no medication caused that so increased sleep spindles may be associated with good memory. ...Read more

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Had polysomnography. Please explain: increase in phasic motor activity w/o stereotypical behaviors seen during REM sleep. ?

Had polysomnography.  Please explain: increase in phasic motor activity w/o stereotypical behaviors seen during REM sleep.  ?

Jump around: in sleep. This needs to be interpreted in the context of all the other brain findings of the sleep study. by itself it isn't all that important and doesn't indicate much except a potential problem for interrupted sleep. especially for the person next to you. ...Read more

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24-Hour Ambulatory pH Test or 24 Hour esophageal impedance-pH test. Are these the same tests or two different tests?

24-Hour Ambulatory pH Test or 24 Hour esophageal impedance-pH test. Are these the same tests or two different tests?

Not the same.: The two tests are not the same, but they are carried out very similarly. The impedance portion of the study allows your doctor to determine how much non-acid reflux is occurring. It is an outpatient study involving a very thin tube to pass into your esophagus overnight. It is very useful in determining the best way to treat acid reflux. Good luck. ...Read more

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Right now I am undergoing a 48 hour ambulatory eeg test and I am a regular cannabis user, will this alter my results in any negative ways?

Right now I am undergoing a 48 hour ambulatory eeg test and I am a regular cannabis user, will this alter my results in any negative ways?

Cannabis: Daniel Amen, MD does research on the brain and cannabis. He finds differences in brains of those using cannabis. Please be sure to tell your doc that you are using this substance because it can impact his/her reading of your results. Peace and good health. ...Read more

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Have twitching in shoulder. Doctor wanted to see it happen, but it does not happen on demand. EMG=normal. Should the Dr run an ambulatory EEG test?

Have twitching in shoulder. Doctor wanted to see it happen, but it does not happen on demand. EMG=normal. Should the Dr run an ambulatory EEG test?

Possibly: If you know when the twitching occurs most often (maybe keep a diary for a short while) and can note what you were doing at the time that could help. Also, they might wish to run a CNV test - to check the function of the nerves. Twitching is often as a result of a nerve issue so that might be more helpful than the EEG. ...Read more