Humanity owes a debt to Takuo Aoyagi, the inventor of the modern pulse oximeter.— Danielle Ofri (@danielleofri) May 3, 2020
He devised a formula to cancel out the “pulsatile noise” of the heartbeat, enabling a steady read of oxygen with red & infrared light.
Sadly, he died on 4/18 of #COVID https://t.co/noUWJb9BjB pic.twitter.com/kqsTkbqL2p