The history of Casio watches

Re:The history of Casio watches by FabHK on Tuesday November 11, 2025 @09:13PM (#45895653)

1992 BP-100:

> World’s first watch with optical blood pressure monitor > The BP-100 calculated blood pressure by analyzing changes in blood flow measured by an optical sensor and ECG signals. No wristwatch had ever incorporated a blood pressure monitor before. Simply touching a fingertip to the sensor produced a reading — and unlike conventional monitors, it was accurate without requiring constriction of the arm.

Wow. Why don't we have that yet in today's smartwatches?

[ Parent | on HN ]

Re:The history of Casio watches by dragonwriter on Tuesday November 11, 2025 @09:41PM (#45895832)

> Why don't we have that yet in today's smartwatches?

Because it doesn't actually work for accurately tracking individual BP changes over time, though it may be useful for broad aggregates.

https://ieeexplore.ieee.org/document/9630063

[ Parent | on HN ]

Re:The history of Casio watches by yourapostasy on Tuesday November 11, 2025 @09:26PM (#45895728)

I'm guessing they aren't widespread yet in doctors' offices due to cost. As near as I can tell, the results are acceptable for clinical settings?

[ Parent | on HN ]