While smartwatches and smart rings cannot directly determine if the wearer is deceased, they can infer an abnormal condition or cessation of vital activity from some biometric signals and sensor data. Below are the differences between a case in which the wearer is deceased and a case in which the wearer has simply been removed.
Signs that the wearer is dead
Cessation of heart rate:
While a living person’s heart rate is always detected, a deceased person’s heart rate stops completely. If the heart rate sensor fails to detect a heartbeat for an extended period of time, it may signal an abnormality.
Sudden drop in blood oxygen level (SpO2):
A sudden drop in blood oxygenation and extremely low values may indicate cessation of breathing.
Changes in skin temperature:
In the event of death, the body temperature gradually approaches the ambient temperature. A sudden drop in body temperature or a steady low temperature may indicate an abnormality.
Complete cessation of movement:
If the accelerometer or gyro sensor detects no movement at all for an extended period of time, this may indicate cessation of activity.
Signs of dislodging
Skin contact detection:
When a smartwatch or smart ring is removed from the body, skin contact sensors (e.g., optical or electrical impedance sensors) detect that skin contact has been lost.
Motion Patterns:
When a smartwatch or smart ring is removed from the body, it detects that the device is no longer in contact with the skin.
When removed, the device changes the movement pattern of the area in which it is placed. For example, if the device is placed on a desk, no slight movement will be detected.
Sensor data stoppage:
When disconnected, bio-data such as heart rate and blood oxygen level will cease.
Conclusion.
The differences between cases where the wearer is deceased and cases where the wearer has removed the device can be summarized as follows
If deceased:
Complete cessation of heart rate
Rapid drop in blood oxygenation
Rapid drop in body temperature or approaching ambient temperature
Complete cessation of movement for an extended period of time
If the device is disconnected:
Loss of skin contact detection
Interruption of biometric data
Changes in movement in the dislodged position (no micro-movement detected where placed)
By comprehensively analyzing these data, smart devices can detect abnormal conditions and prompt emergency responses. However, the device itself does not determine that the person is “dead,” but only informs the user of the abnormality.
NB.
This text is based on asking the AI; the AI’s answers may not always be correct. Important information should be checked.
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