It appears that the sensor was incorrectly wrapped around your finger. Having the sensor on too tight or too loose can cause errors with the test.
There is no need to strap the device tightly. If you experience any discomfort, readjust the adhesive wrap so the sensor gently attaches to your finger, without stretching the wrap.
Similarly, the sensor should not be too loose. As long as the sensor maintains contact with your finger and stays in position during the night, we will be able to collect data for your sleep test.
Need more support? The ResMed team would love to have a chat with you! You can reach us on 1800 737 633. Alternatively, you can email us on email@example.com.