Important Information About Spo2 Measurements - Withings ScanWatch Series Installation And Operating Instructions Manual

5. 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.
6. Do not move or speak for the 30 seconds necessary to take the measurement.
7. 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.

Important information about SpO2 measurements

Factors that may degrade the performance of reflectance pulse oximetry and
heart rhythm analysis via photoplethysmography include:
• Bright sunlight
• Presence of strong electromagnetic fields
• Failure to apply the device correctly (loose wristband application, not on top
of the wrist)
• Tattoos on the wrist in the region of the optical sensor
• Excessive motion of the arm, wrist, or fingers
• Low perfusion caused by ambient temperature below the recommended
operation range, or by certain conditions such as Raynaud's syndrome
• Significant levels of dysfunctional hemoglobin (carboxyhemoglobin,
methemoglobin)
• Venous pulsations
• Intravascular dyes such as cardio green or methyl blue
• Blood-flow restrictions due to arterial catheters, blood pressure cuffs, or
infusion lines
• Hypotension, serious vasoconstriction, serious anemia, or hypothermia
ScanWatch
v1.0 | August, 2020
EN - 72