Danish free-diving champion Stig Severinsen held his breath for over five minutes while in this water tank. He was at CES at the behest of a firm called Masimo which launched a new wearable health-monitoring device called the MightySat. The Masimo device monitored his pulse and oxygen saturation during his time in the tank. It fits on the end of the user’s fingertip and measures oxygen saturation as well as blood flow and pulse. It uses something called Signal Extraction Technology, or Masimo SET, that employs parallel signal processing engines to separate the arterial signal from sources of noise (including the venous signal) to measure SpO2 and pulse rate accurately, even during motion.
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