Google 研究用普通智能手表无袖带检测高血压
Google's AI detects high blood pressure from a regular smartwatch without a cuff
Google Research 的 AI 可借助普通智能手表检测高血压迹象，无需血压袖带做校准，相关研究已发表在 Nature。该系统利用手表已有的脉搏与运动传感器，神经网络从近 50 万小时传感器数据中学习脉搏与心跳模式，再按多天数据计算高血压概率。
研究给出无袖带血压检测的对照数据，读者可据此判断可穿戴健康监测的当前边界。
A Google Research AI can detect signs of high blood pressure using a regular smartwatch, with no blood pressure cuff needed for calibration. The AI relies on two sensors already built into modern watches—a pulse sensor and a motion sensor—according to a Google blog post. The study was published in Nature.
A neural network learned from nearly 500,000 hours of sensor data by comparing short segments and figuring out which ones belonged to the same person, picking up typical pulse and heartbeat patterns without any diagnoses to guide it. The system then averages these patterns over several days and calculates a probability for high blood pressure. Google's health model SensorFM also learns from smartwatch data.
In a study of 196 people across five US research sites, the watch spotted hypertension about as well as a traditional cuff, identifying 65.8 percent of those with high blood pressure compared to 55.3 percent for the standard in-office measurement.
Google says the findings have been folded into the blood pressure trends feature in the Google Health app, but the method is still a research project and doesn't replace a diagnosis. The goal is to nudge people toward getting checked. More than half of people with high blood pressure don't know they have it, according to Google.
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来源：The Decoder · the-decoder.com