Why did my SleepStrip show an E at the end of the study?
The E on the display indicates an invalid study. This is usually caused by the patient removing the SleepStrip before the minimum study time has elapsed (less than 4.5 hours on the face), which may occur without the patient even being aware. Loss of flow signal may also result in an E reading, which can happen if the patient slept with his face buried in the pillow, or his hand flat on the sensors.
