Best practices for using the application

rPPG - By Face

 

In order to get accurate vital-sign readings, follow the instructions below:

• Device:
• The mobile device should be in a fixed position during the entire measurement.
• The device should be placed 30-40cm from the subject.
• The device battery level should be at least 20%.
• The device should be at forehead height or higher and positioned perpendicular to the subject’s face.
• Do not use the application when the device is in power save mode.

• Subject:
• Each measurement set is for a single person.
• The subject must be sitting or standing still during the measurement.

• The subject should have a fully exposed face and look at the screen throughout the whole measurement.

• The subject must stay still as much as possible and avoid any movement (including talking)

• Look at the screen during the whole measurement

• Environmental conditions:
• No light source behind the subject's face.
• No direct sunlight.
• Preferably using a cold light (>4500K), and not a monochrome light.
• No lighting changes during the measurement.
• The recommended minimal light level on the subject face is 400 LUX, and the light in room should be uniformly distributed
• Avoid any highly reflective objects in the room, such as mirrors, glass windows/tables, etc
• Avoid movement of other personnel in the vicinity of the subject.

• Measurement:
• Duration – The full measurement duration is 2.5 minutes.
• Vital signs appearance - each vital sign appears when there is sufficient data. However, there may be cases in which a summary value is not available for some vital signs.

 

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PPG - By Finger

When using the By Finger (PPG) mode, the following recommendations apply:

• Device:
• The mobile device should be in a fixed position during the entire measurement.
• The device should be held by hand.
• The device’s battery level should be at least 20%.
• Do not use the application when the device is in power save mode.

• Subject:
• The subject must be sitting or at rest during the measurement.
• The hand should rest comfortably at heart level.
• iOS - Use the index finger to fully cover both the rear flashlight and the relevant rear camera.
• Android - Use the index finger to fully cover the relevant rear camera, without covering the rear flashlight.
• When placing the finger on the camera, apply moderate pressure.
• Avoid movement of the finger during the measurement.

• Environmental conditions:
• Should not be in complete darkness.

• Measurement:
• Duration – The recommended duration for the finger measurement is 1.5 minutes (90 seconds).

Finger Placement for iOS devices when using PPG

Finger Placement for Android devices when using PPG