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A comment on Bike crash left Spokane man unconscious, so his Apple Watch called 911. Parent comment

Re:Bike crash left Spokane man unconscious, so his Apple Wat... by BjoernKW on Tuesday September 24, 2019 @07:27PM (#21065821)
It watches the heartbeat, probably arrhythmias specifically. You can't monitor blood pressure with just a watch. You need a blood pressure cuff for that.
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Re:Bike crash left Spokane man unconscious, so his Apple Wat... by Symmetry on Wednesday September 25, 2019 @09:41AM (#21070661)
The Apple watch can look at blood oxygen levels too which might have been what triggered the alert.
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Re:Bike crash left Spokane man unconscious, so his Apple Wat... by swayvil on Tuesday September 24, 2019 @08:46PM (#21066417)
Does it watch heartbeat via the gyroscope? If so then that's a darn sensitive gyroscope.
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Re:Bike crash left Spokane man unconscious, so his Apple Wat... by defap on Tuesday September 24, 2019 @08:51PM (#21066440)
Via an optical sensor that can perform photoplethysmography.
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