The result of a one-time measurement with ScanWatch depends on the measurement conditions. Performing multiple measurements allows you to better monitor SpO2 by creating a trend.
To make sure that the measured value is as close as possible to the real physical value, or if the measurement is qualified as "inconclusive", make sure that your watch is correctly positioned and tightened, and that your gesture follows these best practices.
- Place your watch on your non-dominant wrist, 1 cm from the wrist bone.
- Make sure that your ScanWatch is not loose on your wrist. Tighten the band until it is snug but comfortable. When the watch moves, your skin should move along with it.
- Wearing the watch closer to the elbow can help you to obtain a better fit.
How to perform an accurate SpO2 measurement
- Make sure to wear the watch at least 3 to 4 minutes before the measurement.
- Rest your arm on a table, with the hand relaxed and in an open position.
- Do not move or speak for the 30 seconds necessary to take the measurement.
- Push lightly on the top of the watch with your other hand to improve the contact between the skin and the watch, making sure that the bottom of the watch remains flush with the skin.
- Low pulsatile signal often occurs when your hands and/or arms are cold. In this case, rubbing the skin that will be in contact with or around the sensor may help.
Note: For best results, we recommend using the fluoroelastomer wristband provided with ScanWatch.