AXG vs. Typical Home Sleep Test

 

First thing you should know:  Not all Home Sleep Tests are created equal:

Type 4: Records 3 channels. Airflow, thoracic or abdominal movement, and SpO2.  This is one of the two main HSTs (home sleep tests) utilized by HMO insurances in the Sacramento area.  Logically, we can all a see that this doesn’t have anything to do with sleep.  This type of test is more of a home breathing test with an all night oximeter added to it.  I certainly wouldn’t want to have a sleep disorder diagnosed with this type of device.  This is very often auto-scored, which means that whatever the computer spits out is what goes on the report.  These are notoriously very faulty.  See example below of this.  The clear breathing events are completely missed. (click to enlarge).  The top and bottom segments of the screenshot are the same channels at different speeds.  (top is the entire night, the bottom is only a 1 minute window.

You can also see how minimal the testing equipment is in the bottom image.  In this case, minimal is not better.

Type 4 ApneaLink Missed Events

Type 4 ApneaLink Missed Events

Minimal Type 4 Home Sleep Test

This test is also only used as a screening device.  Positive for sleep apnea?  Negative for sleep apnea?  Doesn’t matter.  You’re going back to the lab because the results are virtually always found to be “inconclusive.”  Why?  No EEG.  Without EEG, no breathing abnormalities can be validated or dismissed.  The report is just as inconclusive.  See the example below of this.  (click to enlarge)

ApneaLink Sample Report

Type 4 Home Sleep Test Report

Type 3: Records 4 channels. Same as Type 4, but adds ECG/heart rate.  This is the other test that is used more frequently, though not so much in the Central Valley.  It’s the same as above, but they add ECG.  You’ll find these mostly in Cardiologists offices since they like to have an all night tracing of ECG during sleep.

Type 2: Records minimum of 7 channels. EEG, EOG, EMG, ECG, respiratory airflow and effort, and SpO2.  At the bare minimum, this test outperforms Type 3 and 4 tests with ease.  Sleep times are correct with EEG.  This means that the Apnea Hypopnea Index and the Respiratory Disturbance Index are accurate.  EEG also means that the stages of sleep you entered and for how long are known.  This coupled with body position is very important when considering treatment options for patients found positive for Sleep Apnea.  Picture of Sleep Testing Patient.

AXG Sleep Diagnostics Type 2 Home Sleep Test

AXG Sleep Diagnostics Type 2 Home Sleep Test

 

AXG Sleep Diagnostics uses a Type 2 Home Sleep Test.  We record 20 channels making this the most comprehensive home sleep test available.  You can tell by this screenshot showing the raw data from one of our tests.  Not only does this mean that your results can be validated, we can even detect subtle Respiratory Effort Related Arousals that are missed by many sleep labs when diagnosing patients.  (click to enlarge)

Slow Wave Sleep during AXG Home Sleep Test

Slow Wave Sleep during AXG Home Sleep Test

All of this data is reported to our sleep physician for the most accurate diagnosis available in the comfort of your own home.  Sleep Testing in Sacramento couldn’t get any better.  See some of our sample reports below.

Sample AXG Report Pages

Sample AXG Report Pages

More Sample AXG Report Pages.

More Sample AXG Report Pages.

Please don’t hesitate to call or email if you have any questions:  916-996-0131

support@axgsleepdiagnostics.com