How It Works


BresoDX® is a cordless single-user, home sleep test used to diagnose obstructive sleep apnea in adults.

BresoDX® is worn over the nose and mouth and captures multiple data streams by using two channels, a microphone and an accelerometer.

The microphone detects oronasal breath sounds, snoring, and apneas and hypopneas while sleeping.  The accelerometer detects head movement to estimate sleep time, and position of the head (supine or non-supine).


During a respiratory event, such as an apnea, normal breathing sounds are disrupted. These disruptions mimic the patterns a sleep technician would observe on a respiratory tracing report in a traditional PSG. The BresoDX® algorithm can detect those patterns and generate an AHI score that has been shown to be in 95% agreement with a the standard polysomnography test. In addition to detecting apneas and hypopneas, BresoDX® is also able to detect and quantify snoring episodes with over 97% accuracy.

Up to eight hours of overnight recording is saved onto a microSD card and then analyzed by a proprietary software algorithm to generate a BresoDX® Sleep Study Report, which is then interpreted by a healthcare professional.

Directions For Use

How It Works

Step 1
When you’re ready to begin the test, remove the battery pull tab (a).

How It Works

Step 2
Press the power button (b) on the front of the device. A green indicator light (c) will begin flashing. This indicates the device is recording and ready to use. This light will turn off after a few minutes to allow you to sleep comfortably.

How It Works

Step 3
Place BresoDX® over your nose and mouth, and adjust the strap (d) over your head for a secure, but comfortable fit. You should not feel extra pressure on your face. Go to sleep. For optimal data collection, 6 – 8 hours of sleep is recommended.

How It Works

Step 4
BresoDX® will automatically turn itself off after 8 hours of recording. Gently press and eject the microSD card (e). Insert the microSD card into the User Information Envelope, seal it, complete required information. Return as instructed by your health care provider.