Healthy Adult, 31-year old male
Central Sleep Apnea & AF
Central Sleep Apnea & Atrial Fibrillation
Signal Quality Issues: The Signal Quality Line
- Signal Loss – The mobile app was not able to communicate with the recorder and therefore no signal is received for that period. The result will be a gap in the analysis.
- Artifact – Poor sensor contact or excessive motion during recording will result in signal noise that does not produce valid output. The result is a signal that does not have the appearance of a physiological signal and may exceed the upper and lower extremes of the graph.
- Physiological abnormalities – In patients with chronic arrhythmia, the SleepImage System may be unable to provide to analyze the signal successfully. In these cases, the signal quality line will be yellow, amber, or red, even though the input signal is absent any signal loss or artifact. If a patient is suspected of having arrhythmia, please refer them to the appropriate specialist for further evaluation. The SleepImage System is not intended to rule in or rule out arrhythmia.
The Signal Quality Line is displayed on every screen of the SleepImage Report: Study Overview, Study Detail, and the Raw Data page. It is recommended to navigate to the Raw Data for signal review for any study that does not have a “predominantly green” Signal Quality Line, or extended areas of suboptimal signal quality. See SleepImage System IFU and Introduction to SleepImage for details.
Example 1 - Temporary Signal Loss
Example 2 - Extended Signal Loss
Example 3 - Signal Artifact
Example 4 - Arrhythmia
Important! Please note that the SleepImage System is not intended to aid in identification or diagnosis of any arrhythmias. The information below is provided to explain how to review the Signal Quality Line. If you suspect a patient has arrhythmias, please proceed appropriately.