Скачать или смотреть Checking Oxygen Level Wasn't Easy 🔴

The small device that clips onto your finger and shows your oxygen level in seconds was not born out of convenience but from one man’s relentless curiosity. In 1972, Japanese biomedical engineer Takuo Aoyagi discovered that two simple lights - red and infrared - could reveal how much oxygen your blood was carrying. While companies dismissed his idea as useless, his discovery quietly became the foundation of one of the most important medical tools in modern history.

By the 1980s, American and European firms turned Aoyagi’s research into billion-dollar industries, producing the pulse oximeter that doctors, astronauts, and even COVID patients depend on today. The tragedy? Aoyagi himself was ignored for decades before receiving recognition. What was once a painful, invasive test is now a simple red glow on your finger - a story of genius, neglect, and how innovation can save lives in silence.

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