Contactless Methods For Measuring Respiratory Rate: A Review
2020
Recent advances in understanding the importance of respiratory frequency ( ${ f}_{ R}$ ) as a sensitive marker of a variety of physiopathological stressors are fostering growing interest in respiratory monitoring. This interest is further stimulated by the ever-increasing efforts that companies are devoting to the development of systems measuring ${ f}_{ R}$ . There are a variety of techniques based on different sensors and technologies for ${ f}_{ R}$ monitoring. These techniques are commonly classified as contact-based or contactless, depending on whether the system which embeds the sensor is in contact with the body or not. This review is focused on the contactless methods for ${ f}_{ R}$ monitoring. We have introduced the main fields of use where contactless respiratory monitoring is important and provided a taxonomy to classify the most popular contactless techniques for ${ f}_{ R}$ monitoring. Finally, we have described the performances of the most popular methods, the main open challenges, and the main perspectives.
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