How to Use OSCAR Software to Import Nonin 3150 BLE Data from the ResMed AirSense 11

Why This Method Works

When the Nonin 3150 BLE is paired with an AirSense 11, the oximeter data is written directly onto the same SD card that stores the machine’s high-resolution therapy data (pressure, flow, events, leaks, etc.). Beginning with OSCAR version 1.5.3 (and fully supported in later releases), OSCAR automatically recognizes and displays the Nonin SpO2 and pulse rate graphs when you import the card. Because both data streams share the same clock, the SpO2 trace is perfectly time-aligned with your breathing events—something separate oximeter imports cannot always guarantee.

What You Need

• ResMed AirSense 11 (or AirCurve 11) with an SD card inserted and recording enabled.
• Nonin 3150 BLE WristOx2 that is already paired with the AirSense 11 (see our pairing guide on TurnerMedical.com if needed).
• Fresh AAA batteries in the Nonin (Bluetooth use reduces battery life to roughly 24 hours).
• A computer (Windows, Mac, or Linux) with an SD card reader.
• The latest version of OSCAR software (free download from the official site: sleepfiles.com/OSCAR).

Step-by-Step Instructions

Step 1: Confirm Pairing and Record a Night of Data

1. On the AirSense 11, go to Settings → Pulse Oximeter and verify the Nonin 3150 BLE shows as connected.
2. Power on the Nonin, attach the finger sensor, and wear it on your wrist.
3. Start therapy as usual. The Nonin will stream SpO2 and pulse rate data to the AirSense 11 throughout the night, and the machine will write it to the SD card.
4. In the morning, allow the machine a few minutes after therapy ends so it finishes writing data, then power it off or wait until the activity light stops flashing before removing the card.

Tip: Keep other Bluetooth devices (phones, watches, earbuds chargers) away from the nightstand if you experience intermittent pairing. Fresh batteries in the Nonin also improve connection stability.

Step 2: Download and Install OSCAR (If You Haven’t Already)

1. Go to the official OSCAR download page: https://www.sleepfiles.com/OSCAR/.
2. Download the version for your operating system (Windows 10/11, macOS, or Linux).
3. Install the software and create a user profile when prompted. Personal details are optional and do not affect data import.

Step 3: Import the SD Card Data

1. Remove the SD card from the left side of the AirSense 11 (gently open the small cover).
2. Insert the card into your computer’s SD card reader (or USB card reader).
3. Open OSCAR.
4. Click the CPAP Importer icon on the welcome screen, or go to File → Import CPAP Data (or press F2 on Windows).
5. Navigate to the root of the SD card (the drive itself, not the DATALOG folder) and select it.
6. OSCAR will detect the ResMed data and import all sessions, including the Nonin 3150 BLE SpO2 and pulse rate data that was stored on the card.
7. Wait for the import to finish, then safely eject the SD card and return it to the AirSense 11 so future nights continue to be recorded.

Step 4: Enable Oximeter Graphs in OSCAR

1. In OSCAR, go to File → Preferences (on Mac it is under the OSCAR menu).
2. Select the Waveforms tab.
3. Scroll down to the Oximeter section.
4. Check the boxes for SpO2, Pulse Rate, and any other available oximeter parameters for both the Daily and Overview columns.
5. Click OK to save.
6. On the Daily page, look at the graph selector box (usually bottom-right of the chart area) and make sure the oximeter graphs are turned on (green checkmarks).

Once enabled, you will see SpO2 and pulse rate traces on the Daily view, time-aligned with your flow rate, pressure, events, and leak graphs.

Step 5: Review the Data and Generate Reports

1. Select the night you want to examine from the calendar or Daily view.
2. Scroll through the graphs to correlate SpO2 drops with respiratory events, pressure changes, or large leaks.
3. Look at the left-side statistics panel for session summary numbers (AHI, average/minimum SpO2, etc.).
4. Use the Overview and Statistics tabs to see longer-term trends.
5. To create a shareable report, use OSCAR’s built-in screenshot or print functions, or export selected data via the File menu where available.

Using the Data to Verify Your ResMed Is Working Properly

With both CPAP and Nonin data in the same view, you can quickly assess therapy effectiveness:

• AHI and Events: A low AHI with few residual events is a good sign. Check whether any remaining events cause meaningful SpO2 drops.
• SpO2 Stability: Most of the night should stay above 90–92%. Frequent or deep desaturations (especially 3–4% drops) that line up with events or flow limitation suggest settings may need adjustment.
• Leak Rate: Large leaks (often shown above the red line at 24 L/min on ResMed machines) can reduce therapy effectiveness and sometimes cause SpO2 dips. Address mask fit if leaks are high.
• Pressure Delivery: Confirm the machine is delivering the prescribed pressure range and responding to events as expected. SpO2 recovery after events helps confirm the pressure response is adequate.
• Overall Pattern: Stable SpO2, low AHI, and controlled leaks together indicate the ResMed is working well. Persistent issues should be discussed with your sleep physician or DME.

Because the Nonin data is perfectly synchronized with the AirSense 11 clock, you can trust the alignment when you review the charts with your clinician.

Troubleshooting Tips

• No oximeter graphs appear: Confirm the Nonin was paired and worn, batteries were fresh, and the SD card was in the machine all night. Re-check Preferences → Waveforms and the Daily graph selector.
• Intermittent or missing SpO2 data: Move other Bluetooth devices away from the machine. Ensure the Nonin stays within range (ideally on the same nightstand or nearby).
• Import errors or “no supported data”: Select the root of the SD card drive, not a subfolder. Format a new card to FAT32 if the current card has issues, and power-cycle the AirSense 11 after re-inserting the card.
• Summary statistics incomplete: Daily and Overview graphs are the most reliable. Full oximeter summary statistics have improved in recent OSCAR versions; update if you are on an older release.
• Clock or alignment issues: Because the data is written by the AirSense 11 itself, alignment is normally excellent. If something looks off, check the machine’s date/time settings.

Additional Notes

• Always return the SD card to the AirSense 11 after importing so the machine continues recording future nights.
• OSCAR is free, open-source software maintained by the Apnea Board community. It does not replace clinical interpretation—share reports with your healthcare provider for treatment decisions.
• For advanced Nonin-only reports (ODI, time below thresholds, etc.), you can also use Nonin nVISION software via USB, but OSCAR is the best tool for viewing the data side-by-side with full CPAP waveforms.

Ready to Start Monitoring?

Pair your Nonin 3150 BLE with your AirSense 11, import the data into OSCAR, and gain a clearer picture of how well your therapy is protecting your oxygen levels. Shop the Nonin 3150 BLE and related supplies at TurnerMedical.com.

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