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Pulse oximetry is a noninvasive method for monitoring blood oxygen saturation. Peripheral oxygen saturation (SpO 2) readings are typically within 2% accuracy (within 4% accuracy in 95% of cases) of the more accurate (and invasive) reading of arterial oxygen saturation (SaO 2) from arterial blood gas analysis. [1]
In the early 1920s, manufacturers from Switzerland incorporated scales, to improve the speed, accuracy and reliability of the device measuring a patient's pulse. [6] Today, there is greater interest in smartwatch wearable devices due to their ability to perform many other biometric and technological functions aside from measuring pulse. [7]
The Apple Watch is a smartwatch developed by Apple, debuting in September 2014. [1] The watch accounts for US$20 billion of Apple's annual sales and a third of all smartwatch sales. [2] In October 2013, Cercacor Laboratories chief technology officer Marcelo Lamego emailed Apple chief executive Tim Cook with an idea for a new technology.
The Fitbit Charge 3, a wristband health and fitness tracker introduced in October 2018, was the first device to feature an oxygen saturation (SPO2) sensor; however, as of January 2019, it was non-functional and Fitbit did not provide an implementation timeline. [44] The Fitbit Charge 3 comes with two different-sized bands: small and large.
A smartwatch is a portable wearable computer that resembles a wristwatch. Most modern smartwatches are operated via a touchscreen , and rely on mobile apps that run on a connected device (such as a smartphone ) in order to provide core functions.
The Xiaomi Mi Smart Band 5 (Xiaomi Mi Band 5 in China) is a wearable activity tracker produced by Xiaomi Inc.It was announced in China on 11 June 2020, and went on sale on 18 June 2020 in China, [1] with a Global version released on 15 July 2020 [2] as Xiaomi Mi Smart Band 5.